explain xkcd - User contributions [en]

2654: Chemtrails

2022-08-06T04:28:19Z

Pascal: /* Explanation */ ants are insects

{{comic
| number = 2654
| date = August 3, 2022
| title = Chemtrails
| image = chemtrails.png
| titletext = Ants have reverse chemtrails--regular citizens spraying chemicals everywhere they go to control the government.
}}

==Explanation==
{{incomplete|Created by an INKJET PRINTER FILLED WITH PERFUME. Do NOT delete this tag too soon.}}

{{w|Entomologist}}s study insects. {{w|Ant}}s are an insect that leaves chemical trails to and from food sources or other events. These chemical trails can guide other ants in the colony, for instance, to return to food. Biologists call such signaling chemicals {{w|pheromones}}. This comic uses chemtrail as a shortening of chemical trail.

[[Cueball]] is intentionally conflating ant chemical trails with {{w|chemtrails}}, the subject of a conspiracy theory that the government controls the population by spraying toxic or mind-/body-transformative chemicals from high altitude aircraft.

This myth may be partly based on the practice of {{w|cloud seeding}}, which uses chemical flares containing silver nitrate to attempt to increase precipitation,[https://www.vox.com/videos/23290459/cloud-seeding-manmade-rain-future-perfect] on studies of chemical mind control among ants,[https://www.sciencedirect.com/science/article/abs/pii/S0022191016301640] or on the effects of the common parasite ''{{w|toxoplasma gondii}}'' on cats' prey. Despite [[1677: Contrails|occasional conflation]], chemtrails are distinct from "contrails," short for "condensation trails," which are cloud-like lines in the sky created by airplane engines. Such linear cloud formations only sometimes arise from temperature and pressure disturbances of the passing engines, rather than any deliberate release, but are highly visible in the right conditions under flightpaths, and may have the appearance of "spraying" action. {{w|Nucleation#Examples of the nucleation of fluids (gases and liquids)|Vapor nucleation}} is central to both cloud seeding and contrails.

People sometimes attempt chemical manipulation of unwitting people in small areas (such as scent based marketing, or wearing scented products).[https://www.businessnewsdaily.com/3469-smells-shoppers-spend-more.html] There is very little evidence that sophisticated mind control posited by chemtrail conspiracists is possible, even after extensive research.[https://www.google.com/books/edition/Poisoner_in_Chief/U6iDDwAAQBAJ]

[[Ponytail]] is an entomologist, studying chemically mediated cooperative ant navigation. [[Cueball]] knows she will be annoyed when he tells her, "So, I hear you're really into chemtrails?" Indeed, he gets the reaction he hoped for when she objects strongly and rejects this with a loud, "'''No!!'''" The choice of terminology is often a sore spot for those who study a particular field in depth, for example entomological discussions of "slave-making" in socially parasitic species.[https://evolve.community.uaf.edu/2015/04/23/emantcipation-when-captured-ants-rise-against-their-captors/] [[Randall]] writes in the caption that such misuse is how to annoy people like Ponytail.

The title text humorously contrasts individual ants instinctively deciding how the whole colony behaves by using chemicals to indicate routes to food or dangers to motivate the colony to react to their individual experiences, with the human fear of loss of personal independence by being regulated by otherwise disconnected ruling elites, as depicted in the ant/technology interaction speculative fiction-themed [https://www.youtube.com/watch?v=fISvc-yUU1A "Infrared"] music video by the alt-rock band ''Placebo''.

Ants are a recurring theme, as are those who study them. See for instance [[638: The Search]] which specifically deals with ant's pheromone trails or [[1610: Fire Ants]]. Chemtrails were also the subject of [[966: Jet Fuel]], [[1677: Contrails]], and were mentioned in [[1803: Location Reviews]]. This comic has a similar format to [[2036: Edgelord]]: a simple one-panel interaction consisting of a (likely deliberate) misuse of a term in regards to a professional's work, followed immediately by the professional's upset outburst, and Randall's caption spelling out "How to annoy" the professional. Both seem related to Randall's [[:Category:My Hobby|hobbies]], as he seems to think a lot about how to annoy specific groups of people (perhaps in an attempt to minimize annoyances?).

==Transcript==

:[Cueball stands talking to Ponytail, who has her arms raised and has small lines above her head to indicate annoyance.]
:Cueball: So, I hear you're really into chemtrails?
:Ponytail: '''''No!!'''''

:[Caption below the panel:]
:How to annoy entomologists who study ant navigation

==Trivia==
*Whether ant gland secretion signalling is {{w|Turing completeness|Turing-equivalent}} is explored in Douglas Hofstadter's ''{{w|Gödel, Escher, Bach|Gödel, Escher, Bach: an Eternal Golden Braid}}''.
*Ponytail may conceivably be a professional entomologist who once worked with an editor who inserted the word "chemtrails" in one of her [https://link.springer.com/article/10.1007/s00359-019-01363-z comparative physiology] or [https://link.springer.com/article/10.1007/s10071-020-01354-7 ''Animal Cognition''] drafts competing before a peer review panel with papers by [https://bio.kuleuven.be/ento/pdfs/billen_procnev_2006_signal_variety.pdf Johan Bilen] of the Leuven University Zoological Institute and Harvard's [https://www.hup.harvard.edu/catalog.php?isbn=9780674045880 Rüdiger Wehner].

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Animals]]
[[Category:Chemistry]]
[[Category:Biology]]
[[Category:Puns]]
[[Category:Conspiracy theory]]

2632: Greatest Scientist

2022-06-14T19:10:58Z

Pascal: /* Transcript */ clarify "mathematical symbols"

{{comic
| number = 2632
| date = June 13, 2022
| title = Greatest Scientist
| image = Greatest Scientist.png
| titletext = "Ow! One of the petri dishes I left on the tower railing fell and hit me on the head. Hey, that gives me an idea..."
}}

==Explanation==
{{incomplete|Created by HISTORY'S WURST SCIENTIST - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the feats of six of history's most acclaimed scientists and combines them into one fictional act, claiming that this person was the greatest scientist in history. Pulling off a combination of all of these would, indeed, be rather impressive.{{Citation needed}}

These scientists are most likely {{w|Galileo Galilei}}, {{w|Benjamin Franklin}}, {{w|Alexander Fleming}}, {{w|Ivan Pavlov}}, {{w|Eratosthenes}}, and {{w|Isaac Newton}}.

The ground is noticeably curved in this comic, as the curvature of Earth is mentioned and measured, thus requiring curvature.

Humorously combining multiple science experiments into one was also a punchline in [[1584: Moments of Inspiration]]. Curved floors to represent Earths curvature were mentioned in [[2412: 1/100,000th Scale World]]

==Table of Experiments==
{| class="wikitable"
|+ List of experiments in the comic
|-
! Experiment in comic !! Experiment in reality !! Meaning !! Scientist
|-
| The Leaning Tower of Pisa || {{w|Galileo}} conducted [https://en.wikipedia.org/wiki/Galileo%27s_Leaning_Tower_of_Pisa_experiment an experiment] at the Leaning Tower of Pisa, where he dropped two objects to measure whether the rate at which objects fall is dependent on weight or is constant. || Galileo found that objects with different weights fall at the same rate, disproving Aristotle's statement which purported the opposite. However, {{w|Vincenzo Viviani}} had already discovered this. Galileo's experiment further developed experimentation in science, in opposition to the then-prevailing view that knowledge is learned by studying the writings of the ancients.|| {{w|Galileo Galilei}}
|-
|Flying a kite into a thunderstorm with lightning || In June 1752, Benjamin Franklin performed his famous {{w|kite experiment}} in which he attached a conductive wire to a kite and flew it near a thunderstorm. Attached to the kite was a key, which was further attached to a {{w|Leyden jar}}. || While the kite was not hit by lightning, "Franklin did notice that loose threads of the kite string were repelling each other and deduced that the Leyden jar was being charged." This is sometimes considered the discovery of the fact that lightning contains/is electricity. || {{w|Benjamin Franklin}}
|-
| Two moldy petri dishes || In August 1928, Alexander Fleming put ''Staphylococcus aureus'' into multiple petri dishes and then left to go on holiday/vacation. On September 3, he returned and found that one plate had mould on it. This plate was the only one that did not have ''S. aureus'' bacteria in it. He later repeated this experiment and {{w|History_of_penicillin#The_breakthrough_discovery|the result was confirmed}}. || The mould that Fleming had discovered produced penicillin, an antibiotic. This was the first time that a substance had been discovered that could ''reliably'' treat bacterial infections, having a huge impact on medicine across the world. || Sir {{w|Alexander Fleming}}
|-
| Salivating dog located next to a bell || [https://www.simplypsychology.org/pavlov.html In 1902 Ivan Pavlov conducted a study on dog reflexes] by giving dogs food and simultaneously ringing a bell. When the dog smelled and saw the food, it started salivating. Eventually, simply ringing the bell made the dog salivate, as the dog had associated the bell ringing with food. Pavlov also performed other, less humane experiments on other dogs. || This was the discovery of {{w|classical conditioning}}, where a stimulus is paired with an unrelated other thing through repeated exposure. The subject will eventually react to the unrelated thing in the absence of the stimulus. This is an example of taught reflexes, where a subconsious reaction like a reflex or instinct is taught. || {{W|Ivan Pavlov}}
|-
| The shadow angle of the dog determining the circumference of the Earth || |In the 200s BCE, the Greek philosopher Eratosthenes {{w|Earth's_circumference#Eratosthenes|measured the circumference of the Earth}}. While his exact method has been lost to time, a simplified version remains: At high noon on the summer solstice in Syene, Egypt, the sun was almost directly overhead. This was confirmed with a sundial. 5,000 stadia away in Alexandria, at the same time, the angle of the sun was measured with another sundial and converted into a fraction of the Earth's circumference. Some simple multiplication could then yield the circumference of the Earth. || The distance Eratosthenes calculated for the circumference of Earth was 250,000 stadia. This estimate was either 2.4% low or 0.8% high compared to modern knowledge, depending on whether he used Greek or Egyptian stadia - a remarkably accurate estimate for the time. || {{w|Eratosthenes}}
|-
| (Title text) A petri dish falling on the scientist's head, leading to a new discovery || Sir Isaac Newton, an inventor of calculus and discoverer of his famous {{w|Newton's laws of motion|Laws of Motion}}, also determined the basic mechanics of {{w|gravity}}. It's sometimes claimed that Newton came up with the notion of gravity when an apple fell from a tree and hit him on the head. While this is almost certainly an embellishment, Newton apparently told acquaintances that his inquiries into gravity were {{w|Isaac_Newton#Apple_incident|"occasion'd by the fall of an apple"}}. This purportedly led Newton to consider the question of what ''exactly'' caused the apple to fall straight to the ground. || This line of thinking ultimately let him to deduce the {{w|Law of Universal Gravitation}}, which is fundamental to understanding celestial mechanics. || Sir {{w|Isaac Newton}}
|}
It is also possible that the fact that two petri dishes fell in the comic but only one fell in the title text could be an obscure reference to {{w|Albert Einstein}}, through either the twins paradox or superposition. However, this connection is rather far-fetched and is more likely just a minor discrepancy.
==Transcript==
{{incomplete transcript |Please change this comment when editing this page. Do NOT delete this tag too soon.}}

:[On the left of the panel, there are some buildings and trees representing Pisa, Italy. One of these buildings is the Leaning Tower of Pisa. The height of the tower is labeled h1, the length of its shadow L1, and the angle θ1. Attached to the top of the tower, there is a kite string. The kite is in the top right, next to a thunderstorm. Two disks are shown falling from the kite onto a bell underneath. The bell goes "Ding! Ding!" Next to the bell is a dog. The height of the dog is labeled h2, the length of its shadow L2, and the angle θ2. The ground is noticeably curved.]

:[Caption below the panel:]
:History's greatest scientist was probably that one who measured the shadow of the Leaning Tower of Pisa while flying a kite into a distant thunderstorm where lightning caused two moldy Petri dishes to fall onto a bell next to a salivating dog whose shadow angle determined the circumference of the Earth.

{{comic discussion}}
[[Category: Science]]

2549: Edge Cake

2021-12-02T18:48:07Z

Pascal: /* Explanation */ skipped every century unless evenly divisible by 400

{{comic
| number = 2549
| date = December 1, 2021
| title = Edge Cake
| image = edge_cake.png
| titletext = Every time IERS adds or removes a leap second, they send me a birthday cake out of superstition.
}}

==Explanation==
{{incomplete|Created by FRINGE FRUITCAKE – Please change this comment when editing this page. Do NOT delete this tag too soon.}}

[[Megan]] (possibly an IERS agent) wishes Emily, represented as [[Hairbun]], Happy Birthday. This prompts a confused [[Cueball]] to ask if her birthday was sometime last month. Emily explains that she was born over the North Pole in a plane, meaning that she was born in every timezone at once. Technically though this is false, as there are some timezones (such as {{w|Nepal Standard Time|UTC+5:45}}) that are not represented at the north pole. Except for the one hour before it's midnight at the International Date Line, the date in eastern time zones is one day ahead of western time zones. She also says that it was February 29th (presumably it was also February 28 or March 1 in some time zones). February 29th only happens at most once every four years in the Gregorian calendar, adding to the confusion - people born on February 29th often celebrate their non-leap-year birthdays on arbitrary days (or {{w|The_Pirates_of_Penzance#Synopsis|not at all}}). Normally {{w|Birth aboard aircraft and ships|one could simply use the time in the airline company's native country}}, but the airline company was changing ownership from one country to another at the time, so this option has apparently been ruled out.

The punchline is that rather than try to identify the correct birthday for Emily, the {{w|BIPM}} has decided to let her have birthdays whenever she wants.

Both the comic title and Cueball's final line are puns on "{{w|edge case}}", an engineering term referring to situations or conditions that are unusual in a way likely to cause problems unless specifically accounted for. Edge pieces are generally only important with sheet goods (brownies sheet cakes, etc), which are typically cut into pieces creating a difference between pieces originating on the edge and pieces originating from the center. Since the sides of a cake are often frosted, an edge piece has two faces covered in frosting and a corner piece has three, while a center piece only has one. Depending upon your relative preferences between the surface (often icing over marzipan) and core body of the cake (which can be fruitcake, or some variety of spongecake, etc, but not actually obvious which until the cake is cut), it being an edge-faced slice can be considered a bonus. Cueball certainly seems to appreciate this.

The title text states that the {{w|IERS}} sends Emily a cake every time they add or remove a leap second, out of superstition (perhaps Megan is delivering that cake). The International Earth Rotation and Reference Systems Service is in charge of global time standards. It occasionally adds one leap-second to {{w|Coordinated Universal Time}} to adjust for changes in the rotation speed of the Earth.

==Transcript==
:[Megan is walking towards Cueball and Emily (who resembles Hairbun), holding a cake.]
:Megan: Happy birthday, Emily!
:Cueball: Wait, wasn't that last month? When's your birthday, anyways?
:Emily: It's complicated.

:[A diagram of a flight path over the North Pole, with meridian lines radiating out from the center. Emily's dialogue appears above the diagram, but she herself does not appear in this panel.]
:Emily: My mom went into labor on an arctic international flight that diverted directly over the North Pole.
:Emily: I was born in every time zone at once.

:[With Megan standing behind her, Emily holds out a plate of cake to Cueball.]
:Emily: It was also February 29th, and the airline was just changing ownership between countries.
:Emily: The International Bureau of Weights and Measures finally issued a declaration that it's my birthday whenever I want.
:Emily: Cake?
:Cueball: Nice, it's all edge pieces.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Hairbun]]
[[Category:Time]]

1732: Earth Temperature Timeline

2021-08-11T00:42:42Z

Pascal: /* Jokes in the comic */ fix link

{{comic
| number = 1732
| date = September 12, 2016
| title = Earth Temperature Timeline
| before = [[#Explanation|↓ Skip to explanation ↓]]
| image = earth_temperature_timeline.png
| titletext = [After setting your car on fire] Listen, your car's temperature has changed before.
}}

==Explanation==
{{TOC}}
This comic is a [[:Category:Timelines|timeline]] on how the temperature has changed from 20,000 BCE (Before {{w|Common Era}}) to the present day (2016), with three predictions for the rest of the 21st century depending on what actions are taken (or not taken) to stop CO₂ emission. This comic is a direct, but much more thorough, follow up on the previous global warming comic: [[1379: 4.5 Degrees]]. By having readers scroll through millennia of slow-paced natural changes, Randall uses the comic to confront the rapid temperature rise in recent years.

Over the past 100 years, human action has produced a large amount of {{w|CO₂ emissions}}, which have caused a rise in average global temperature through the {{w|greenhouse effect}}. This is called {{w|global warming}} and is part of a {{w|climate change}}, a subject that has become a [[:Category:Climate change|recurrent subject]] on xkcd. There are still many people who claim that this is not happening, or at least that it is not caused by any human actions, called {{w|Climate change denial|climate change deniers}}. One argument of theirs is that global warming is happening for natural causes, summarized with the phrase "temperature has changed before".

This comic shows that while temperature changes have indeed occurred before, the speed of the current temperature rise is much, much faster than those measured for many previous thousands of years. The comic became so popular that [[Randall]] [[#Popularity_of_comic|postponed the release]] of his next comic to keep this one on the front page one day longer.

The temperature curve is a dotted line most of the time, but from about 1850 to 2016 the measurement data is good enough to let the curve become a solid line indicating that this is not an estimate. Before 1850 the temperature is an estimate based on the [[#Sources|sources]] given. And likewise into the future the three possible curves are also dotted to show that they are predictions, based on how seriously the population of Earth takes knowledge (and comics) like this.

Although this is a topic Randall obviously takes very seriously, and by far most of the facts fit with known history, he still includes several [[#Jokes in the comic|jokes in the comic]]. See also the [[#Table of all elements|table]] explaining each item in the comic. After the election of {{w|Donald Trump}} for president later the year of this comic's release, it is possible that Randall believes that his worst fears (as expressed by the current path at the bottom) will hold up, with the actions taken by the new president.

The title text compares the saying that "the temperature has changed before" comparing temperature changes over thousands of years to the rapid global warming over the last century with saying that the "small" changes to the temperature a car experiences over the years of normal usage should not make you worried over the rapid temperature increase that happens when someone sets your car on fire. Randall previously used this joke in [[1693: Oxidation]].

===Jokes in the comic===
* By placing the invention of the internet at 1980 in the chart, just where the temperature curve starts its most rapid increase, Randall humorously implies that the internet caused the rise in temperature.
* At 13600 BCE a glacier is shown retreating from New York because of the warm up. It is disgusted by the new changes and proclaims: ''That’s it! I’m moving to Canada!'' This is a joke on [https://www.rollingstone.com/politics/politics-news/want-to-move-to-canada-if-trump-wins-not-so-fast-100658/ an idiom said by US citizens] to protest against changes in their country. As shown in the chart, the glacier takes 5000 years (13600-8400 BCE) to cross what would become the Canadian border (neither the United States nor Canada existed yet). Also, glaciers don't speak English, or any language for that matter.{{Citation needed}}
* At 13400 BCE it is mentioned that {{w|origin of the domestic dog|humans domesticate dogs}}. [[Megan]] talks to a wolf about to be tamed making a deal with it, that it can eat and sleep with the humans as long as they can yell at it for pooping indoors. This sounds like a sweet deal for the wolf until [[Cueball]] mentions that they will {{w|Dog breeding|breed}} it to be {{w|Chihuahua (dog)|very small}} and then dress it up in small {{w|Dog's fashion|costumes}}. The wolf says wait, but it is already too late...
* The {{w|Pokémon}} reference at 9000 BCE about them going extinct in North America (although Megan does proclaim that this is not a real fact). As the writing stated that ''Pokémon go extinct'' this can also be seen as a reference to a popular video game called {{w|Pokémon Go}} and hence also the comic [[1705|1705: Pokémon Go]].
* At 4500 BCE, next to "{{w|Proto-Indo-European language}} develops", [[Ponytail]] gets the idea to develop the language heavily inflected to make it difficult to remember all the verb endings for future students. This is a direct reference to the comic [[1709: Inflection]].
* The reference to the 1984 {{w|mockumentary}} about the fake rock band {{w|This Is Spinal Tap}} in conjunction with {{w|Stonehenge}} at 2200 BCE. In the movie the band ordered a giant 18 feet Stonehenge megalith but a writing mistake gives them one that is only 18 inches high.
**Another real band {{w|Nine Inch Nails}} is referenced 16000 BCE where Megan writes the bands stylized name NIИ on the wall next to [[Hairy]] who is in the process of painting the {{w|cave painting}} at {{w|Lascaux}} in France.
* Around the setting of the {{w|Iliad}} and the {{w|Odyssey}} (1200 BCE) a drawing of the {{w|Trojan Horse}} has writing on it that states: ''Not a trap''.
* Just below the previous entry also at 1200 BCE is the mentioning of the invasion of the {{w|Sea Peoples}}. This sounds so much like a reference to {{w|Mermaid|mermaids}}, often called {{w|Mermaid#One_Thousand_and_One_Nights|sea people}} that Randall feels the need to note that this invasion and these sea people is ''a real thing'' in a footnote. This is opposed to the Pokémon reference above where he notes that it is ''not a real fact''. The sea people was a seafaring confederation of groups known to have attacked ancient Egypt and other Bronze age civilizations around this time. It is widely regarded to be one of the major causes of the {{w|Late Bronze Age collapse|Bronze Age Collapse}}.
* The reference at 450 BCE compares the {{w|Battle of Thermopylae}} (also known as 300 Spartans) with the dramatized 2007 movie ''{{w|300 (film)|300}}'', but in the real world the fighting of course occurred [https://youtu.be/FCfdyroV7kc?t=12 at regular speed and with more clothing].
*There are other minor jokes but this list mentions all the major jokes.

===Table of all elements===
*Here is table including all elements in the chart with explanations including reading off temperature and year for each event from the curve.
**The year group is just an easy way to find the section.
**Element is a description mainly taken from the transcript.
**The actual year of an event has been read off more precisely on the chart.
***The central part of the element has mainly been used.
***Only rarely has ranges below 100 years been used but if a location is clearly midway between two hundred years intervals 50 year range has been used.
***Only when there are several posts close to each other has smaller range been used a few times.
**T (°C) is the number of degrees Celsius above or below the 1961-1990 average, which on this graph is set to zero, (i.e. not the number of physical degrees above or below this 0°C).
***These have been read of to 0.1°C rounding up or down. Lines have been inserted over the chart, 10 for each degree, to make this as accurate as possible.
***In a few cases where a maximum is reached 0.05°C has been used
**Explanation of each element.
{| class="wikitable"
!Year group
!Element
!Year
!T (°C)
!Explanation
|-
| rowspan="2"| 20000 BCE
| [An arrow goes from the dotted line to the central line at 0°C (representing the 1961-1990 average). In the middle of the line there is a temperature label:] 4.3°C At the start of our timeline, 22,000 years ago, Earth is 4°C colder than during the late 20th century. || 20000 BCE || -4.3 || The scale here is relative, showing the magnitude of change rather than an absolute temperature reading. As a rule, {{w|climate}} changes are compared with a 30 year interval, and the 1961-1990 average was {{w|Climate#Definition|chosen for convenience}} as the "normal" to compare temperature changes with, but any other choice of baseline would show the exact same changes. The {{w|Last glacial period}} (aka ice age) reached its {{w|Last Glacial Maximum|maximum extent}} approximately 22 to 24 thousand years ago.
|-

| {{w|Boston}} is buried under almost a mile of ice, and the {{w|glaciers}} reach as far south as {{w|New York City}}. [The Statue of Liberty is shown in front of a glacier front. [[Knit Cap]] is seen in the snowy landscape. The skyline of Boston is shown under a half a mile of ice.] || 19700 BCE || -4.3 || This shows what a difference 4 degree in global temperature means (massive effect), as opposed to four degrees on a daily weather wise scale (trivial). The Boston image is directly taken from [[1225: Ice Sheets]] about the ice age glacier coverage; it was also shown buried in ice in [[1379: 4.5 Degrees]].
|-
| rowspan="3"| 19500 BCE
| But the world is about to warm up. || 19500 BCE|| -4.3 || The warming process actually takes thousands of years, which this comic will portray down thousands of pixels to come. This is not a fast warm up, especially not compared to the one we are currently experiencing (at the bottom of the chart).
|-
| By this time, humans have already spread across {{w|Africa}}, {{w|Eurasia}}, and {{w|Australia}}. || 19300 BCE || -4.3 || {{w|Homo Sapiens}} successfully {{w|Recent_African_origin_of_modern_humans#Movement_out_of_Africa|migrated out of Africa}} somewhere between {{w|Recent_African_origin_of_modern_humans#Dating:_pre-or_post-Toba|130,000}} and {{w|Recent_African_origin_of_modern_humans#Coastal_route|70,000}} BCE.
|-
| They’ve created {{w|painting}}, {{w|pottery}}, {{w|rope}}, and {{w|Bow and arrow|bows and arrows}}, but haven’t developed {{w|writing}} or {{w|farming}}. || 19100 BCE || -4.3 || The {{w|History of painting#Pre-history|oldest known paintings}} date back to about 38,000 BCE. The {{w|Ceramic_art#History|oldest known pottery}} date back to about 20,000 BCE. The {{w|Rope#History|oldest known rope}} date back to about 26,000 BCE. The {{w|History_of_archery#Stone_Age_and_Bronze_Age_archery|oldest known arrows}} date back to about 70,000 BCE, but Randall seems to be mistaken about the bows which seems to be {{w|History_of_archery#Stone_Age_and_Bronze_Age_archery|at most 10,000 years old}}. Writing is mentioned again at 3500 BCE and farming at 10,000 BCE.

|-
| rowspan="2"| 19000 BCE
| Changes in the Earth’s orbit mean that more sunlight reaches the polar ice… || 18600 BCE || -4.2 ||{{w|Milankovitch cycles}} are repeated climate variations on a timescale of tens of millennia caused by cyclic variations in {{w|Orbital eccentricity|eccentricity}}, {{w|axial tilt}}, and {{w|precession}} of the {{w|Earth's orbit}}, which thus then determined climatic patterns on Earth. The Milankovitch cycles are referenced again around 4700 BCE.

|-
| [A line chart with a labeled Y-axis "Summer sun W/m2 at 60°N" with three labeled ticks ranging from 450-550. The curve starts up and then goes down five times and up four times ending down. There is one plateau towards the end compared to the rest of the curve where the ups and downs are quite alike.] || 18600 BCE || -4.2 || The chart shows the input of sun during summer time in the {{w|Northern hemisphere}} (at {{w|60° northern latitude}}) as the effect (W) per square meter (m2) which fluctuated in the range from 450-550 during the time shown in the chart. There is, however, no scale for the time between the peaks. This chart relates to the text about increasing sun to the polar ice in the entry above.

|-
| rowspan="1"| 18500 BCE
| [A map of the world. At the top is a light gray area covering {{w|North America}}, {{w|Greenland}} and northern {{w|Europe}} and most of the northern part of {{w|Russia}}. A similar gray area covers {{w|Antarctica}}. The gray areas are labeled as ice.] || 18300 BCE || -4.2 || This [[:Category:Maps|map]] shows where the ice covered the {{w|northern hemisphere}} (and Antarctica) during the {{w|Last Glacial Maximum}}. The continents have not moved much since then, but the lower water level caused by the amount of water bound up in the ice, can clearly be seen in several locations. For instance, the {{w|British islands}}, Greenland, and {{w|Papua New Guinea}} are connected to their respective neighboring continents. Also {{w|Alaska}} and Russia are connected through the ice sheets covering the northern part of the Earth.
|-
| rowspan="1"| 18000 BCE
| …And the ice sheets start to melt. || 17900 BCE || -4.1 || This was a slow process that takes 10,000 years. The ice is mentioned again at 13,600 and 8400 BCE.

|-
| rowspan="1"| 17500 BCE
| Temperatures have been creeping upward, but around this point, CO2 levels start to climb…|| 17300 BCE || -4.1 || Due to the release of gasses from various sources (dissolved in the ocean, trapped in {{w|permafrost}}, etc), {{w|Carbon dioxide in Earth's_atmosphere#Measuring ancient-Earth carbon dioxide concentration|atmospheric CO2 levels}} increased by 100 parts per million over a span of thousands of years. Modern civilization has added the same amount in a single century.

|-
| rowspan="1"| 17000 BCE
| …And then the warming speeds up. || 16700 BCE || -4.1 || It took 3000 years for the temperature to increase with one degree. So this sentence can be seen as sarcasm about the rate of natural climate change compared to modern {{w|anthropogenic}} (human caused) warming.

|-
| rowspan="1"| 16500 BCE
| [Cueball is standing with a spear just the right of the graph talking to a rabbit.] Cueball: Still pretty cold. || 16200 BCE || -4.0 || True, because although the temperature has risen with 0.3°C over the last 4000 years, it's still 4°C below the 1961-1990 average.

|-
| rowspan="2"| 16000 BCE
| [Megan touches the dotted line to the right of her, with Ponytail standing on the other side. The graph has finally passed the -4°C line below the 1961-1990 average.] || 15600 BCE || -3.9 || Megan is the first drawing on the left side of the curve. She seems to be pushing the temperature up.
|-
| [In the right part of the chart is an explanation of the data. Below the first two lines there are four drawings each showing possible temperature swings in reality compared to the smoothed data that represents the dotted curve of the entire chart. The dotted curve is shown in all four drawings and a thin line is shown running along it but with much more fluctuation left and right on the first two, a large spike right on the third and a large bump way right on the fourth. Above these there are two labels. The first labels is inside a bracket that covers the first three, and the last label is for the last drawing. Below is a list of sources.] Limits of this data: Short warming or cooling spikes might be “smoothed out” by these reconstructions but only if they’re small or brief enough. Possible Unlikely Reconstructions are from Shakun (2012) and Marcott (2013), scaled to Annan + Hargreaves (2013) estimate for the last glacial period. || 15600 BCE || -3.9 || This is Randall's pre-emptive response to skepticism about the accuracy of prehistoric data. {{w|Ice cores}} and similar records might miss individual year-to-year variation, but should catch sustained changes lasting many decades, which is the time scale that matters for climate. See links to the [[#Sources|sources below]].

|-
| rowspan="1"| 15500 BCE
| In what is now {{w|France}}, humans paint murals on the walls of the {{w|Lascaux}} caves [Hairy paints three animals, two with horns, and two humans, Cueball holding hand with Hairy who has a spear. On the other side of the central line Megan writes three letters, the last of which is reversed:] NIИ || 15200 BCE || -3.8 || A reference to the industrial techno band {{w|Nine Inch Nails}} as Megan writes the bands stylized name NIИ on the wall next to Hairy who is in the process of painting part of the {{w|cave paintings}} at Lascaux in France.

|-
| rowspan="1"| 15000 BCE
| Ice sheets around {{w|Alaska}} shrink, exposing a land bridge between Asia and North America [From around the bottom if this section and down to 11500 BCE the dotted curve moved steadily to the right towards warmed temperature peaking close to 1.5°C below the 1961-1990 average. Before this the temperature had not moved much away from that at the start.] || 14600 BCE || -3.5 || This land bridge is known as {{w|Beringia}}. It is mentioned again at 8300 when it disappears due to the rising seas.
|-
| rowspan="1"| 14500 BCE
| [Cueball walks right looking back at the graph behind him. Megan walks in front of him pointing further right.] Cueball: Cool. Humans reach {{w|North America}}. || 14200 BCE || -3.3 || This is approximately when the humans from {{w|Asia}} crossed the land bridge mentioned in the previous entry, from what is now {{w|Siberia}} to what is now {{w|Alaska}}. {{w|Settlement of the Americas}} occurred around the time shown in the chart, although {{w|Settlement_of_the_Americas#Chronology|it's possible}} that earlier humans did so by boat prior to the formation of the land bridge. Cueball's comment is a double entendre; it was figuratively "cool" that early people migrated this far, and the climate was literally cool compared to modern times.

|-
| rowspan="2"| 14000 BCE
| The edge of the ice withdraws from {{w|New York City}} and retreats north. || 13700 BCE || -3.1 || Even though the ice began to melt 4000 years before (at 18,000 BCE in the chart) it is first now that New York City is free of ice.
|-
| [A large glacier front speaks in a speech bubble with an arrow pointing at it. Behind is there are four peaks in the horizon and in front of it three small melting pools and some rocks on the ground.] Glacier: ''That’s it! I’m moving to Canada!'' || 13600 BCE || -3.0 || When US citizens are unhappy with changes in their country, they sometimes say they will move to Canada in protest. Here it is the glacier that is anthropomorphically unhappy with the climate changes. However this is a slow process; it crosses the Canadian border more than 5000 years later.

|-
| rowspan="2"| 13500 BCE
| Humans domesticate dogs (Date uncertain, may be much earlier) || 13400 BCE || -3.0 || See {{w|Origin of the domestic dog}}. This timeline event is not quite accurate. The first dogs differentiated from {{w|Gray wolf|wolves}} about {{w|Origin_of_the_domestic_dog#Time_of_domestication|23,500 years ago}}, but there was an event around 13500 BCE that increased the population size and may be attributable to domestication events.
|-
|| [Megan and Cueball is watching a wolf looking at them.] Megan: Okay, you can live in our homes and we’ll feed you, but we’ll still get mad if you poop on the floor. Wolf: Deal. Cueball: And we get to breed you to be tiny and dress you in little costumes. Wolf: …Wait. || 13100 BCE || -2.8 || Megan is making a deal with the wolf that it can eat and sleep with the humans as long as they can yell at it for pooping indoor. This sounds like a sweet deal for the wolf until Cueball mentions that they will {{w|Dog breeding|breed}} it to be {{w|Chihuahua (dog)|very small}} and then dress it up in small {{w|Dog's fashion|costumes}}. The wolf says wait, but it is already too late...

|-
| rowspan="2"| 13000 BCE
| {{w|Woolly Rhino}} goes extinct || 12900 BCE || -2.7 || Mainland woolly rhinos died in the {{w|Quaternary extinction event}}, but a small island population survived until {{w|Woolly_rhinoceros#Extinction|around 8000 BCE}}. Woolly rhinos likely became extinct in part due to {{w|Holocene extinction|over-hunting}}. Randall's choice of species on this chart seems to focus on animals that were greatly affected by humans, for good or ill.
|-
| {{w|Oregon}} is scoured by huge floods as glacial dams burst and lakes of meltwater flow to the sea || 12600 BCE || -2.2 || This is a reference to the {{w|Missoula Floods}} several cataclysmic floods that swept periodically across eastern {{w|Washington}} and down the {{w|Columbia River Gorge}} flooding much of eastern Washington and the {{w|Willamette Valley}} in western Oregon at the end of the last ice age. During the last {{w|deglaciation}} ice dams formed then burst several times between 13,000 and 11,000 BCE.

|-
| rowspan="1"| 12500 BCE
| Ice sheets withdraw from Chicago || 12200 BCE || -1.8 || The next step towards the Canadian border, after they left New York at 13,600 BCE.

|-
| rowspan="1"| 12000 BCE
| Humans settle {{w|Abu Hureyra}} in {{w|Syria}} || 11550 BCE || -1.6 || A well-preserved prehistoric village that existed from 11,000 to 7000 BCE (a little later than noted in the chart), allowing archaeologists to study how their culture developed.

|-
| rowspan="1"| 11500 BCE
| [An arrow on the left side of the dotted curve is pointing down along the dotted curve and to the left indicate temperature is declining again, meaning the dotted curve now moves left to colder temperatures. This only continues until 10500 BCE. It is only the second time something is noted on the left side after Megan at 16000 BCE] Temperatures start to decline, mainly in the Northern hemisphere This may be caused by changes in ocean circulation due to the floods of cold fresh meltwater flowing into the Atlantic as the North American ice sheet melts. This cooler period is called the {{w|Younger Dryas}} || 11300 BCE || -1.6 || In the Younger Dryas, the Earth cooled by almost one degree over 1000 years. There were {{w|Outburst flood#Glacial_floods_in_North_America_.288.2C000_to_15.2C000_years_ago.29|several floods}} during the end of the ice age but the most famous is the one from {{w|Lake Agassiz}}. A similar but less global effect could occur if the ice on {{w|Greenland}} melts too quickly and causes a {{w|shutdown of thermohaline circulation}}. Without the {{w|Gulf Stream}}, hot water would remain in the Gulf of Mexico and the Caribbean instead of warming the {{w|North Atlantic}} and Europe. The movie {{w|The Day After Tomorrow}} dramatized a worse-than-worst-case version of this, happening in days instead of centuries.

|-
| rowspan="1"| 11000 BCE
| [This is the first text to the left of the dotted curve:] Humans reach {{w|Argentina}} || 10900 BCE || -1.8 || The earliest evidence of {{w|Indigenous_peoples_in_Argentina#Prehistory|humans in Argentina}}. Finally the temperature graph has risen enough that there is space to write text on the left side of the curve.

|-
| rowspan="2"| 10500 BCE
| [An arrow pointing down along the right side of the dotted curve and to the right indicate temperature is increasing again, meaning the dotted curve now moves right to hotter temperatures. This continues until 8000 BCE where it levels out just above the 1961-1990 average.] Warming resumes || 10500 BCE || -1.8 || After 1000 years of slightly decreasing temperatures the warm up of Earth resumes. Over the next 3000 years the temperature increases 2.5°C, reaching a long plateau about 0.5°C above the 1961-1990 average around 7500 BCE.
|-
| Human settlements at {{w|Jericho}} ||10050 BCE || -1.4 || The {{w|Jericho#Pre-Pottery_Neolithic.2C_c._9500_BCE|first permanent settlement}} on the site of Jericho occurred around 9500 BCE, but there is evidence of {{w|Jericho#Natufian_hunter-gatherers.2C_c._10.2C000_BCE|non permanent settlement}} during this period, when cold and drought made permanent habitation in that region difficult.

|-
| rowspan="1"| 10000 BCE
| First development of {{w|farming}} || 9750 BCE || -1.1 || This is now called the {{w|Neolithic Revolution}}, i.e. the wide-scale transition of many human cultures from a lifestyle of {{w|Hunter-gatherer|hunting and gathering}} to one of {{w|agriculture}} and settlement. The {{w|history of agriculture}} began independently in several locations with both {{w|domestication}} of animals and the farming of different {{w|cereals}}. One of the first regions to develop farming was the {{w|Fertile Crescent}}. This is also around this time that the last ice age is said to have ended.

|-
| rowspan="2"| 9500 BCE
| {{w|Saber-toothed cat}} goes extinct || 9200 BCE || -0.3 || Although one of these (Smilodon) was known as the {{w|saber-toothed tiger}}, most saber-toothed "cats" are not related to tigers, or any modern {{w|cats}} at all, but can be viewed as examples of convergent evolution. {{w|Smilodon}} became extinct around 8000 BCE, and the last Saber-toothed cat first became extinct around 7000 BCE, which does not fit very well with Randall's range. Indirectly humans may have caused the extinction of the Saber-toothed cat by over-hunting their {{w|megafauna}} prey, depriving the cats of food sources.

|-
| {{w|Horses}} disappear from {{w|North America}} || 9100 BCE || -0.2 || The {{w|evolution of the horse}} began millions of years ago in North America; early species {{w|Evolution_of_the_horse#Miocene_and_Pliocene:_true_equines|migrated across Beringia into Eurasia}} before their predecessors {{w|Evolution_of_the_horse#Pleistocene_extinctions|died out}}.

|-
| rowspan="4"| 9000 BCE
| | Last North American {{w|Pokémon}} go extinct [Cueball with a spear and Megan is looking up at this last “fact”.] Megan: That is not a real fact. || 8900 BCE || -0.1 || Pokemon are not real. This faux-extinction is likely a reference to the {{w|Pokémon Go}} game, which Randall spoofed in [[1705|1705: Pokémon Go]]. Virtual Pokémon now thrive throughout the entire world, and are most commonly found near [http://time.com/4443225/pokemon-go-affluent-white-neighborhoods-report/ affluent first world neighborhoods].

|-
| Temperatures reach modern levels || 8800 BCE || 0.0 || It took 11,200 years for the temperature to increase 4.3°C. It's possible that human-created effects will produce an equal change in a few hundred years.
|-
| Rising seas cut off the {{w|land bridge}} between North America and Asia || 8700 BCE || 0.1 || {{w|Beringia}} was freed of ice in 15,000 BCE. This is an example of what happens when the temperature rises and glaciers melt. Sea levels are rising again as ice on {{w|Greenland}} and {{w|Antarctica}} continues to melt.

|-
| {{w|Cattle}} domesticated || 8500 BCE || 0.2 || Cattle feature prominently in the comic [[1338: Land Mammals]].

|-
| rowspan="2"| 8500 BCE
| Ice sheets retreat across the Canadian border || 8400 BCE || 0.3 || Finally the glacier that began retreating from New York around 13,600 BCE succeeded in moving to Canada as it had threatened to do...
|-
| Temperatures start to level out slightly above 1961-1990 levels || 8050 BCE || 0.4 || The next 3000 years the temperature stays within 0.2°C degree of a temperature 0.5°C above the 1961-1990 average. A very long and stable period.

|-
| rowspan="1"| 8000 BCE
| [The above sentence breaks over the 8000 BCE line. From here a maximum in temperature on the chart is reached at 0.5°C above the 1961-1990 average, which will not be overtaken until 2000 CE. It stays almost constant here until 5000 BCE where a slight cooling begins.] || 8000 BCE || 0.4 || This is the only five hundred year span with no events listed fully inside. Maybe because nothing happens with the temperature.

|-
| rowspan="2"| 7500 BCE
| This warm, stable period is called the {{w|Holocene Climate Optimum}} || 7400 BCE || 0.5 || Some skeptics like to say "[http://www.skepticalscience.com/10000-years-warmer.htm it was warmer in the Holocene]." This is no longer true. Global temperature began encroaching Holocene levels in 1998, and has equaled or possibly exceeded them since 2014.
|-
| {{w|Jiahu}} settled in China || 7050 BCE || 0.5 || Jiahu is another prehistoric settlement, similar to Abu Hureyra (12000 BCE), that was extensively studied by archaeologists.

|-
| rowspan="2"| 7000 BCE
| Final collapse of the North American ice sheet leads to rapid 2-4m sea level rise… || 6800 BCE || 0.55 || The temperature almost reached 0.6°C above the 1961-1990 average before this happened and caused the slight decrease in temperature mentioned below.
|-
| [A small arrow points down and left to the right of the dotted curve. There is a small decrease in temperature but it is very small and would have been missed without the arrow and label.] …And a period of cooling in the Northern hemisphere || 6550 BCE || 0.5 || A 0.05 degree decrease in 200 years again refers to the theme of slow natural climate change.

|-
| rowspan="1"| 6500 BCE
| As seas rise to near their modern levels, Britain is cut off from mainland Europe || 6300 BCE || 0.45 || This is a reference to the flooding of {{w|Doggerland}}.

|-
| rowspan="1"| 6000 BCE
| Humans develop copper metalworking || 5600 BCE || 0.5 || The {{w|copper age}} was relatively brief before humans discovered how to make {{w|bronze}}.

|-
| rowspan="2"| 5500 BCE
| Massive volcanic eruption in {{w|Oregon}} creates crater lake || 5300 BCE || 0.55 || {{w|Crater Lake}} is the caldera at the top of Mount Mazama, a collapsed stratovolcano. If it erupted again, it could become a Somma volcano (see [[1714: Volcano Types]]).
|-
| {{w|Gold}} metalworking || 5050 BCE || 0.6 || The temperature peaks here at just a bit more than 0.6°C above the 1961-1990 average. It will not rise above this level until the global warming sets in in the 1900s.

|-
| rowspan="2"| 5000 BCE
| {{w|Invention of the wheel}} || 4900 BCE || 0.6 || Wheels are one of the most important inventions of humanity. They feature in many xkcd comics, such as [[1075: Warning]].
|-
| [To the right of the dotted curve is an arrow pointing down and slightly left. From here temperature decreases very slowly but steadily from 0.5°C above the 1961-1990 average until 1000 BCE where a stable plateau is reached around the 1961-1990 average.] Earth begins to cool slowly mainly due to regular cycles in its orbit || 4800 BCE || 0.5 || Again a reference to the {{w|Milankovitch cycles}} mentioned in detail at 18,600 BCE. Here they cause a cooling rather than a heating as they did back then.

|-
| rowspan="3"| 4500 BCE
| {{w|Proto-Indo-European language}} develops || 4400 BCE || 0.5 || Most of the languages in Europe, the Middle East, and India share a surprising number of common roots. PIE is the theoretical ancestor from which they descend. Randall mentions this language family in many comics, such as [[890: Etymology]].
|-
| [To the right of the curve Ponytail holds up a hand towards Cueball.] Ponytail: Let’s make our language heavily inflected, so future students have to memorize a zillion verb endings! Cueball: Okay! || 4400 BCE || 0.5 || Ponytail gets the idea to develop the language heavily inflected to make it difficult to remember all the verb endings for future students and Cueball is okay with that. This is a direct reference to the comic [[1709: Inflection]].
|-
| Permanent settlements in the {{w|fertile crescent}} || 4200 BCE || 0.5 || The Fertile Crescent is one of those things you're supposed to remember from grade school. A lot of historic milestones happened there, such as the pyramids of Giza, the code of Hammurabi, and the Abrahamic religions.

|-
| rowspan="2"| 4000 BCE
| Horses domesticated || 3950 BCE || 0.5 || Horse riding was the greatest advance in land travel until the invention of engines. Horses appear in many xkcd comics, such as [[936: Password Strength]].
|-
| {{w|Minoan culture}} arises on Crete || 3700 BCE || 0.5 || Minoan culture invented many strange and wonderful things, such as the Labyrinth at Knossos and {{w|Bull-leaping}}.

|-
| rowspan="4"| 3500 BCE
| {{w|Egyptian mummification}} || 3500 BCE || 0.5 || xkcd has discussed mummification in {{what if|134|What If? 134: Space Burial}}.
|-
| Rise of the {{w|Indus Valley civilization}} || 3300 BCE || 0.5 || The largest bronze-age civilization.
|-
| Invention of {{w|writing}} in {{w|Sumer}} “{{w|prehistory}}” ends, “{{w|history}}” begins || 3200 BCE || 0.5 || Our knowledge of prehistoric events must rely on digging up artifacts and making inferences. After this time, it became possible to find descriptions of past people and events, which is the definition of history. (Old guy in Sumer: Kids these days with their new-fangled stone tablets, instead of using their memory...)
|-
| Earliest human whose name we know (Pharaoh {{w|Iry-Hor}} in Egypt) || 3100 BCE || 0.5 || The first named person we know of today! This was also mentioned as a "cool fact" in the title text of [[1355: Airplane Message]].
|-
| rowspan="5"| 3000 BCE
| {{w|Three Sovereigns and Five Emperors}} period in China || 2800 BCE || 0.4 || The temperature has finally dropped below 0.5°C above the 1961-1990 average after almost 2000 years of cooling from 0.6°C above the 1961-1990 average.
|-
| {{w|Gilgamesh}} || 2700 BCE || 0.4 || Gilgamesh was probably a Sumerian king whose tales were exaggerated into mythology.
|-
| {{w|Imhotep}} || 2600 BCE || 0.4 || Imhotep was not a pharaoh, but a wise commoner who was elevated to chancellor, high priest, and post-mortem divinity.
|-
| {{w|Maya civilization|Mayan}} culture emerges || 2600 BCE || 0.4 || Like the ancient Egyptians, Mayans are remembered for pyramids and {{w|logograph}}s.
|-
| {{w|Great Pyramid}} constructed || 2650 BCE || 0.4 || xkcd has discussed pyramids in [[1717: Pyramid Honey]] and {{what if|95|What If? 95: Pryamid Energy}}.

|-
| rowspan="3"| 2500 BCE
| {{w|Corded Ware culture}} in Europe || 2500 BCE || 0.3 || The term Corded Ware was invented by an archaeologist; no civilization actually called themselves that.
|-
| [To the left of the curve two rock musicians with long hair and electrical guitars are standing on either side of a small gate made of three slabs of stone, one on top of the other two standing stones.] {{w|Stonehenge}} completed || 2200 || 0.3 || This is a reference to the 1984 {{w|mockumentary}} about the fake rock band {{w|This Is Spinal Tap}}. In the movie the band wanted a giant Stonehenge prop 18 feet high, but a writing mistake gives them one that is only 18 inches.
|-
| {{w|Chariots}} developed || 2000 BCE || 0.3 || But {{w|Chariots of Fire}} came much later.

|-
| rowspan="3"| 2000 BCE
| {{w|Alphabetic writing}} developed in Egypt || 1750 BCE || 0.2 || Obligatory reference to xkcd [[1069: Alphabet]].
|-
| Last {{w|mammoth}}s on a tiny Siberian island go extinct || 1650 BCE || 0.2 || Many of the {{w|Pleistocene megafauna}} died in the {{w|Quaternary extinction event}}. Like the {{w|woolly rhino}} (see 12900 BCE) these animals likely became extinct in part due to {{w|Holocene extinction|humans hunting them}}, which may be why Randall included them in the chart. Most of the mammoths died out before 8000 BCE but {{w|Woolly_mammoth#Extinction|some survived in remote areas}} and the last known population died on {{w|Wrangel Island}} in the {{w|Arctic Ocean}} around 2000 BCE, slightly earlier than Randall shows here.
|-
| {{w|Minoan eruption}} || 1600 BCE || 0.2 || This volcano may have led to the downfall of Minoan civilization.

|-
| rowspan="5"| 1500 BCE
| {{w|Iron smelting}} || 1400 BCE || 0.1 || The beginning of the {{w|Iron Age}}.
|-
| {{w|Olmec}} civilization develops in Central America || 1350 BCE || 0.1 || No, Maggie, not Aztec, [http://vimeo.com/34002760 Olmec].
|-
| [A Trojan horse with two Cueball-like guys in front and a third standing on its back. Its back is at three Cueball’s height and its head rises to the level of the Cueball on its back. It stands on a platform with four wheel on the visible side. There is text on the horse] Setting of the ''{{w|Iliad}}'' and the ''{{w|Odyssey}}'' Text on horse: Not a trap || 1250 BCE || 0.1 || A reference to the {{w|Trojan War}} qua the drawing of the {{w|Trojan Horse}}. The horse was a big trap letting the soldiers hidden inside it into {{w|Troy}}. This explains why it has ''Not a trap'' written on it. Else they would not have taken the giant wooden horse present from their sworn enemies into their city just like that... Note that the Trojan horse isn't mentioned in the Iliad, and only recalled in passing by the characters in the Odyssey.
|-
| Invasion of the {{w|Sea peoples}}* * A real thing || 1200 BCE || 0.1 || {{w|Mermaid#One_Thousand_and_One_Nights|Sea people}} might sound like a reference to mythical {{w|mermaid}}s, so Randall feels the need to footnote that this event was ''a real thing'' (as opposed to his Pokémon reference, which he notes is ''not a real fact''). The sea peoples were a seafaring confederation of groups known to have attacked ancient Egypt around this time.
|-
| {{w|Polynesians}} explore the Pacific Ocean || 1000 BCE || 0.1 || {{w|Polynesian navigation}} was surprisingly widespread.

|-
| rowspan="8"| 1000 BCE
| [From 1000 BBC to 1000 CE the temperature is stable and very close to the 1961-1990 average.] || 1000 BCE || 0.1 || The temperature has fallen from the Holocene Optimum by half a degree to just a bit above the the 1961-1990 average. It will stay in this range for the next 2000 years.
|-
| {{w|Solomon}} || 1000 BCE || 0.1 || Solomon may have been a real historical king, but he probably did not threaten to chop a baby in half.
|-
| {{w|Iliad}} and {{w|Odyssey}} composed || 900 BCE || 0.1 || These classic myths were written more than 300 years after their supposed events. Archaeologists believe the city of {{w|Troy}} existed (and was destroyed by war around the right time period), but characters like Helen, Odysseus, and Achilles did not.
|-
| Rise of {{w|Greek city-states}} || 800 BCE || 0.1 || This is ''Sparta'', along with Athens and several others.
|-
| {{w|Neo-Assyrian Empire}} || 800 BCE || 0.1 || Hi, you may remember us from such kings as Adad-nirari and Sennacherib.
|-
| {{w|Ancient Olympic Games|First Olympics}} || 750 BCE || 0.1 || The first of the ancient Olympic Games is traditionally dated to 776 BC.
|-
| {{w|Zapotec civilization|Zapotec}} writing in modern Mexico || 600 BCE || 0.0 || Another Central American culture that fell to the Spanish invasion.
|-
| {{w|Confucius}} || 550 BCE || 0.0 || "He who knows all the answers has not been asked all the questions."

|-
| rowspan="10"| 500 BCE
| The stuff in the {{w|300 (film)|movie ''300''}}, but regular speed and with more clothing || 450 BCE || 0.0 || A reference to the {{w|Battle of Thermopylae}} by comparison with the 2007 movie ''300'' about this battle. The real Spartans wore armor, and real humans don't [http://www.google.com/search?q=300+slow-motion fly through the air in slow motion when struck].
|-
| {{w|Buddha}} || 450 BCE || 0.0 || Randall also mentions other religious figures like {{w|Jesus}} and {{w|Muhammad}}.
|-
| {{w|Nazca Lines}} || 350 BCE || 0.0 || These huge ancient drawings are difficult to see from ground level, leading some people to believe that they were intended for aliens.
|-
| {{w|Alexander the Great}} || 350 BCE || 0.0 || One of the most successful conquerors of the iron age, known for supposedly cutting the {{w|Gordian Knot}}.
|-
| {{w|Mayan hieroglyphics}} || 250 BCE || 0.0 || The {{w|Maya Calendar}} was probably created hundreds of years later.
|-
| {{w|Ashoka the Great}} || 250 BCE || 0.0 || The {{w|Edicts of Ashoka}} proselytized Buddhism across the continent.
|-
| {{w|Paper}} invented || 200 BCE || 0.0 || A significant step up from stone tablets or even papyrus.
|-
| {{w|Asterix}} || 100 BCE || 0.0 || Fictional main character in ''The Adventures of Asterix'', a comic series set around 50 BCE when {{w|Julius Caesar}} conquered {{w|Gaul}}.
|-
| {{w| Teotihuacan|Teotihuacán}} metropolis || 100 BCE || 0.0 || Another ancient city much beloved by archaeologists, even though they don't know who built it.
|-
| {{w|Julius Caesar}} || 50 BCE || 0.0 || Aside from being a conqueror, dictator, and deity, Julius had a big impact on {{w|Julian Calendar|calendars}}. The month of Quintilis was renamed July to honor him, and he was famously assassinated on the ides (middle day) of March.
|-

|-
| rowspan="8"|1 BCE 1 CE
| [Instead of a zero, there are two numbers for each of the two scales before (1 BCE) and after Christ (1 CE)] || 0 CE || -0.1 || Originally the year range went directly from 1 BC to 1 AD. The year zero has since been added for ease of mathematical and astronomical calculations.
|-
| {{w|Roman Empire}} || 1 CE || -0.1 || Julius never held the title "Emperor"; his adoptive son Augustus was the first to do so.
|-
| {{w|Jesus}} || 1 CE || -0.1 || Randall also mentions other religious figures like {{w|Buddha}} and {{w|Muhammad}}.
|-
| [To the left and erupting volcano.] {{w|Pompeii}} || 100 CE || -0.1 || The volcano is {{w|Mount Vesuvius}} which exploded in 79 CE and is famous for burying everyone in the close by city Pompeii preserving peoples bodies inside the huge amount of ash that swallowed the city very rapidly. Today it has given the archeologist lots of knowledge about the culture of that time.
|-
| {{w|Three Kingdoms}} period || 250 CE || -0.1 || Not just a series of movies and video games, but an actual thing that happened in China.
|-
| {{w|Gupta empire}} || 700 CE || -0.1 || Not as great as Ashoka, but still a pretty important time in the history of India.
|-
| Various groups take turns sacking {{w|Rome}} || 550 CE || -0.1 || 500 years is a pretty successful span for an empire.
|-
| {{w|Attila the Hun}} || 550 CE || -0.1 || He probably would not mind being remembered as one of the most infamous barbarians in history.

|-
| rowspan="4"| 500 CE
| {{w|Muhammad}} || 600 CE || 0.0 || Randall also mentions other religious figures like {{w|Buddha}} and {{w|Jesus}}
|-
| {{w|Tang Dynasty}} || 750 CE || 0.0 || A golden age in China, responsible for the development of printing, gunpowder, and many other advances.
|-
| [An arrow to the right of the dotted curve pointing down, takes a swing far out from the curve and then bends back again. The text label next to it breaks into the next 500 period. The dotted curve stays stable at the 1961-1990 average along this arrow.] {{w|Medieval warm period}} in Europe and some northern regions (too regional to affect the global average much) || 900 CE || 0.0 || Changes in ocean currents caused various regions to warm up while others cooled.
|-
| {{w|Leif Eriksson}} || 950 CE || 0.0 || Probably the first European explorer to reach North America.

|-
| rowspan="7"| 1000 CE
| [To the left a drawing of a compass with needle pointing the black end towards north east. There are labels for the four main directions (N, S, W, E) and a label next to it:] {{w|Magnetic compass}} navigation || 1050 CE || 0.0 || It's much easier to sail to the Orient when you can orient yourself.
|-
| [The dotted curve moves to the left towards lower temperature reaching a minimum around 1650 CE of about 0.6°C below the 1961-1990 average at the {{w|Little Ice Age}}.] || 1150 CE || -0.1 || This less than half a degree drop in temperature over 500 years was enough to cause the "Little Ice Age" which resulted in extended ice coverage in the winters in instance Europe. See more below at the entry for the Little Ice Age.
|-
| {{w|Ghengis Khan}} || 1200 CE || -0.2 || Mongol emperor. {{w|Gengar}} is not named after him, but [http://bulbapedia.bulbagarden.net/wiki/Kangaskhan_(Pokémon) Kangaskhan] and [http://awoiaf.westeros.org/index.php/Khal the Khals] are.
|-
| {{w|Zheng He}}’s fleet explores Asia and Africa || 1400 CE || -0.3 || He explored farther than European contemporaries like Dias or de Gama.
|-
| {{w|Aztec Empire|Aztec Alliance}} || 1400 CE || -0.3 || Aztec dominance only lasted a century until Cortes arrived, but their cultural legacy is indisputable.
|-
| {{w|Printing press}} || 1450 CE || -0.3 || {{w|Johannes Gutenburg}} ushered in the {{w|Age of Enlightenment}}.
|-
| {{w|Christopher Columbus|Columbus}} || 1490 CE || -0.3 || The time given here references when Christopher Columbus reached the {{w|Americas|New World}} in 1492. The five events around 1500 CE lies very close together but it fits with Columbus fitted in just before 1500.

|-
| rowspan="2"| 1500 CE
| {{w|European Renaissance}} || 1500 CE || -0.3 || From here on, the chart has labels for each 100 year increment instead of 500, but the scale stays the same. Important events happens so much faster in these last five hundred years, there isn't enough space to write all of them, so Randall has had to be selective. He includes {{w|Isaac Newton}} but leaves out {{w|Albert Einstein}}, includes {{w|airplane}}s but leaves out {{w|car}}s, etc.
|-
| {{w|Shakespeare}} || 1600 CE || -0.4 || xkcd references Shakespeare many times, such as [[79: Iambic Pentameter]] and [[1026: Compare and Contrast]].

|-
| rowspan="2"| 1600
| {{w|Isaac Newton|Newton}} || 1650 CE || -0.4 || Isaac Newton appears in various xkcd comics, such as [[626: Newton and Leibniz]].
|-
| [To the right of the dotted curve there is an arrow pointing down that makes a swing in towards the curve and then back out again. This is the coldest it has been since 9500 BCE. It is labeled:] ”{{w|Little Ice Age}}” || 1650 CE || -0.4 || This was not a true geologic Ice Age, just a slightly chilly period when the temperature fell a fraction of a degree, but still colder than it had been through 11,000 years of human civilization. In Europe the winters were so cold that the river {{w|Thames}} {{w|Little_Ice_Age#Europe|froze over}} hard enough to hold {{w|River Thames frost fairs}} between 1607 and 1814. And in 1658 {{w|Sweden}} crossed the {{w|Danish Straits}} on foot to invade {{w|Copenhagen}} in the {{w|March Across the Belts}}. It was only possible due to the harsh winters of the Little Ice Age, demonstrating how much half a degree of climate change can mean.

|-
| rowspan="2"| 1700
| {{w|Steam engines}} || 1750 CE || -0.4 || The {{w|Age of Steam}} heralded the upsurge of human CO2 emissions.
|-
| {{w|United States Declaration of Independence|Unites States Independence}} || 1770 CE || -0.3 || On July 4, 1776.

|-
| rowspan="3"| 1800
| {{w|Industrial Revolution}} || 1825 CE || -0.3 || Not to be confused with {{w|Industrial music}} such as Nine Inch Nails.
|-
| {{w|Electrical telegraph|Telegraphs}} || 1830 CE || -0.3 || [https://youtu.be/gEGQUgWBQL4?t=56s -. --- .-- --..-- / - .... . / -- --- - .... . .-. / --- ..-. / ... .- -- ..- . .-.. / -- --- .-. ... . / .- .-.. .-- .- -.-- ... / ... . -. - / - .... . / .-.. .- -.. / --- ..- - / --- -. / .- / .... --- .-. ... .]
|-
| [After this the dotted curve becomes solid.] || 1850 CE || -0.3 || From 1850 weather records became sufficiently accurate and widespread to greatly improve the precision of climate measurements. Hence the curve stops being an estimate and thus also stops being a dotted curve and becomes solid.

|-
| rowspan="6"| 1900
| {{w|Airplane}}s || 1900 CE || -0.3 || xkcd discusses airplanes many times, such as [[726: Seat Selection]] and {{what if|30|30: Interplanetary Cessna}}.
|-
| {{w|World Wars}} || 1930 CE || -0.2 || Likewise, there are many xkcds on this topic, such as [[261: Regarding Mussolini]] and {{what if|100|100: WWII Films}}.
|-
| [The solid line takes a step to the right close to the 1961-1990 average. Over the rest of the 1900s it moves closer to the 1961-1990 average, crossing it before 2000 where it almost reaches the maximum temperature of 0.5 °C above the 1961-1990 average from earlier in 8000 BCE.] || 1940 CE || -0.2 || This is what the previous 14000 pixels of comic has been leading up to. After a laborious 20 millennia of gradual and meandering climate change, it should be clear that a full degree of warming in a single century is unprecedented in human history, and very unlikely to be natural variation.
|-
| {{w|Fossil fuel}} CO2 emissions start rapidly increasing || 1950 CE || -0.1 || The infamous [http://www.skepticalscience.com/Hockey-stick-or-hockey-league.html "hockey stick"] starts around here.
|-
| {{w|Nuclear weapons}} || 1950 CE || -0.1 || The Working Group on the 'Anthropocene' suggests dating the {{w|Anthropocene}} epoch from ~1950. The week after this comic [[1736: Manhattan Project]] with a mushroom cloud was released.
|-
| {{w|Internet}} || 1980 CE || 0.1 || The origin of the internet dates back to 1960 but it began growing rapidly in 1980. By placing the invention of the {{w|internet}} at 1980 in the chart, just where the temperature curve starts its most rapid increase, Randall uses this [[552: Correlation|correlation]] to humorously imply that the internet caused the rise in temperature. This is also where the temperature crosses the 1961-1990 average, which has to happen somewhere due to the {{w|Intermediate Value Theorem}}.

|-
| rowspan="2"| 2000
| {{w|Northwest Passage}} opens || 2000 CE || 0.4 || This was dramatic evidence that the climate had changed. When global warming removes enough sea ice to create shipping routes that never existed before, then it is clear to people that ''something'' is changing, even if they disregard who/what is responsible for the change.
|-
|[From here to present day the solid line increases rapidly and in 2016, present day, is almost reaches 1°C above the 1961-1990 average, with about 0.8°C above the 1961-1990 average.] || 2016 CE || 0.8 || '''Notice''': [http://www.skepticalscience.com/argument.php?a=11&p=2 Warming did not stop] in 1998.

|-
| rowspan="3"| 2016
| | Present day || 2016 CE || 0.8 || Today, just after the two hottest months ever measured since 1850 had ended (July and August 2016), this comic was released with the message displayed very clearly here below. Act now or fry...
|-
| [From here the curve once again becomes dotted as this is the future. After one dot it splits in two and after the first two dots another split between them occurs forming three possible future dotted curves.] || 2016 CE || 0.8 || Here stops the data and the projection into the future begins so the curve again becomes dotted. Three different scenarios are depicted.
|-
|The first curve bending down before the others, and thus to the right of the other two reaches about 1.2°C above the 1961-1990 average and then goes straight down and stops at the 2100 line. An arrow points to it from the left and a label is written partly before and the rest after the 2100 line to the left of the curve:] Best-case scenario assuming immediate massive action to limit emissions || 2100 CE || 1.2 || If humanity does all in its power to stop global warming we might be able to halt the global warming already before 2050 keeping the maximum temperature to just 1.2°C above the 1961-1990 average. Only 0.4°C above today's temperature. (Note that this is not, in fact, the absolute best-case scenario, as it assumes that no new greenhouse gasses are either added to or removed from the atmosphere in the future; the temperature rise could be kept to an even lower level if some or all of the already-emitted greenhouse gasses were removed from the atmosphere.)

|-
| rowspan="2"| 2100
| [The middle curve bends a little down after reaching 1.3°C above the 1961-1990 average, and then continues this path reaching 2°C above the 1961-1990 average in 2100. An arrow point from below to it and a label is written below the curve and below 2100 line:] Optimistic scenario|| 2100 CE || 2.0 || If all the current realistic preventions are implemented, which might not be so realistic, then we may not even stop the warming but slow it down so we "only" reach 2°C above the 1961-1990 average in 2100 CE but it would not stop there. This is half the temperature change experienced since the ice age, but the other way. This was directly referenced in the title text of [[1379: 4.5 Degrees]]: ''That's only HALF an ice age unit (IAU), which is probably no big deal.''
|-
| [The last line continues along the path from the last 16 years of the solid line reaching 4.2°C above the 1961-1990 average at 2100, almost as far on the other side of the 1961-1990 average in 150 years as it took 14,000 years to move from the other side from the start of the chart. Another arrow point to this from below with a label below the curve and below 2100 line:] Current Path || 2100 CE || 4.2 || In this last scary scenario Randall assumes the temperature keeps rising steadily by extrapolating along the slope of the last two to three years. Randall has warned about the hazards of [[Extrapolating]], but this line is in fact [http://www.skepticalscience.com/climate-best-to-worst-case-scenarios.html below the worst case predictions]. If this comes true we will reach a temperature increase taking us from the 1961-1990 average and in just 125 years to 4.2°C above this average. That is just as far above this average in that short time span as the ice age temperature was below. And it took more than 11,000 years for nature to reach such an increase. Randall already contemplated what this would be like in the +1 ice age unit (IAU) panel of [[1379: 4.5 Degrees]] two years ago, as well as in [[164: Playing Devil's Advocate to Win]] almost 10 years ago. He may get to ''enjoy quite a ride'' as he "wished" for back then.

There is no reason to assume the temperature will not keep rising past 2100 CE, so the {{w|Cretaceous Thermal Maximum|"Hothouse Earth"}} of the early {{w|Cretaceous period}} mentioned in the 4.5 degree comics +2 IAU panel might come to pass in future centuries if we continue on our current path. On the bright side, modern civilization might collapse if this trend keeps up, which would drastically cut our releases of carbon dioxide and other greenhouse gasses into the atmosphere. But then again, positive feedback from methane in melting {{w|permafrost}} might take over... Good luck Earth.
|}

===Sources===
The image attributes climate data sources as "Shakun et al. (2012), Marcott et al. (2013), Annan and Hargreaves (2013), HadCRUT4, IPCC":
* Shakun et al. (2012) - [http://www.nature.com/nature/journal/v484/n7392/full/nature10915.html Nature], [http://www.atm.damtp.cam.ac.uk/mcintyre/shakun-co2-temp-lag-nat12.pdf (pdf)]
* Marcott et al. (2013) - [http://science.sciencemag.org/content/339/6124/1198 Science], [http://content.csbs.utah.edu/~mli/Economics%207004/Marcott_Global%20Temperature%20Reconstructed.pdf (pdf)]
* Annan and Hargreaves (2013) - [http://www.clim-past.net/9/367/2013/cp-9-367-2013.html Climate of the Past] [http://www.jamstec.go.jp/frsgc/research/d5/jdannan/LGM_temp.pdf (pdf)]
* {{w|HadCRUT}} - [http://www.metoffice.gov.uk/hadobs/hadcrut4/ Official site]
* {{w|Intergovernmental_Panel_on_Climate_Change|IPCC}} -[http://www.ipcc.ch/ Official site]

==Transcript==
'''Note''' there are several spelling errors in the comic, so please do only correct spelling errors that are not part of the comic! See more in the [[#Trivia|trivia section]].
:[A large heading, followed by a sub-caption. Below that two lines with a statement in between:]
:<big>A timeline of Earth’s average temperature</big>
:since the last ice age glaciation
:When people say “The climate has changed before,” these are the kinds of changes they’re talking about.

:[A very long chart below the headings above is headed with a label for the scale of the X-axis above the chart. Below that a sub-caption. To the left an arrow down to the top of the chart pointing to the dotted curves starting point (at -4.3°C below the 1961-1990 average) with a label above the arrow. And arrow pointing left to the left of the center and another pointing right to the right of the center has labels. Below these is the temperature scale of the X-axis, with 9 ticks between the borders each with a label ranging from -4 to +4°C compared to the 1961-1990 average, but with another step in each direction not labeled towards to axis so the chart covers -5 to +5°C compared to the 1961-1990 average.]
:'''Temperature'''
: Compared to the 1961-1990 average
:Start
:Colder
:Warmer
:-4°C -3°C -2°C -1°C 0°C +1°C +2°C +3°C +4°C

:[To the right of the chart is a gray text standing on the side down along the outer boarder of the chart with the sources for the chart:]
: Source: Shakun et. al. (2012) , Marcott et. al. (2013), Annan and Hargreaves (2013) , HadCRUT4, IPCC 

:[The chart is split in 10 columns by the temperature scale and the borders. The two central columns are white, and then from there to the left the background becomes a faded color that changes from light blue to blue at the edge in four steps. Similarly to the right the color changes from light red to red. To the left there is a time scale taking 500 years leaps from 20,000 BCE all the way to year 1, where there are two years, one for BBC and one for CE. The 500 year leaps continue until 1500 CE and from there the steps are down to 100 years until 2100 with also present day 2016 labeled. After 1500 the CE is omitted. The labels stop there, but there is space below covering down to 2200 CE. There is clearly visible division line across the chart on the level of each of the 500 step, and fainter lines for each of the 100 steps all the way even though only the last 5 of these 100 steps are labeled. There is a similar clear line at 2016. Below each step on the Y-axis is noted, and then any text starting before the next step is noted below indented. If there are extra image belonging to text this is indented once more. The graph that the whole chart is about is a dotted line that begins at the “start” point mentioned above at -4.3°C and then begins to go straight down. It will change left and right all the way down. To being with all text and most drawings are to right of the dotted curve. Whenever something is to the left it will be noted. When it says to the left above something, and then nothing over the next, then the next will be to the right. Only at the very bottom are there more entries to the left than right. ]
:20000 BCE
::[An arrow goes from the dotted line to the central line at 0°C. In the middle of the line there is a temperature label:]
::4.3°C
::At the start of our timeline, 22,000 years ago, Earth is 4°C colder than during the late 20th century.
::Boston is buried under almost a mile of ice, and the glaciers reach as far south as New York City.
:::[The Statue of Liberty is shown in front of a glacier front. A very tiny Cueball is on top of the glacier. The drawing is labeled and so is also the glacier.]
:::New York
:::Ice
:::[Cueball (wearing a knit cap with a pom-pom is seen walking in a snowy landscape leaving black footprints behind him. He walks through the white central part of the chart.]
:::[The skyline of Boston is shown with two clear buildings among all the other. Above it is a line and in between this area has been filled with thin lines. The drawing is labeled and so is this area. Also the skyline has an arrow pointing at it with a label:]
:::Boston
:::Ice
:::Modern skyline

:19500 BCE
::But the world is about to warm up.
::By this time, humans have already spread across Africa, Eurasia, and Australia.
::They’ve created painting, pottery, rope, and bows and arrows, but haven’t developed writing or farming.

:19000 BCE
::Changes in the Earth’s orbit mean that more sunlight reaches the polar ice…
:::[A line chart with a labeled Y-axis with three labeled ticks. The curve starts up and then goes down five times and up four times ending down. There is one plateau towards the end compared to the rest of the curve where the ups and downs are quite alike.]
:::Summer sun W/m2 at 60°N
:::550
:::500
:::450

:18500 BCE
::[A map of the world. At the top is a light gray area covering North America, Greenland and northern Europe and most of the northern part of Russia. A similar gray area covers Antarctica. There are two labels in the gray area above and one in the gray area below:]
::Ice Ice
::Ice

:18000 BCE
::…And the ice sheets start to melt.

:17500 BCE
::Temperatures have been creeping upward, but around this point, CO2 levels start to climb…

:17000 BCE
::…And then the warming speeds up.

:16500 BCE
::[Cueball is standing with a spear just the right of the graph talking to a rabbit.]
::Cueball: Still pretty cold.

:16000 BCE
::[Megan points to the graph to the right of her and between her and Ponytail standing on the other side. Mean is the first drawing on the left side of the dotted curve, which has hardly moved since the beginning, only to just on the other side of 4°C.]
::[In the right part of the chart is an explanation of the data. Below the first two lines there are four drawings each showing possible temperature swings in reality compared to the smoothed data that represents the dotted curve of the entire chart. The dotted curve is shown in all four drawings and a thin line is shown running along it but with much more fluctuation left and right on the first two, a large spike right on the third and a large bump way right on the fourth. Above these there are two labels. The first labels is inside a bracket that covers the first three, and the last label is for the last drawing. Below is a list of sources.]
::Limits of this data:
::Short warming or cooling spikes might be “smoothed out” by these reconstructions but only if they’re small or brief enough.
:::Possible Unlikely
::Reconstructions are from Shakun (2012) and Marcott (2013), scaled to Annan + Hargreaves (2013) estimate for the last glacial period.

:15500 BCE
::In what is now France, humans paint murals on the walls of the Lascaux caves
::[Hairy paints three animals, two with horns, and two humans, Cueball holding hand with Hairy who has a spear. On the other side of the central line Megan writes three letters, the last of which is reversed.]
:::NIИ

:15000 BCE
::Ice sheets around Alaska shrink, exposing a land bridge between Asia and North America
::[From around the bottom if this section and down to 11500 BCE the dotted curve moved steadily to the right towards warmed temperature peaking close to -1.5°C. Before this the temperature had not moved much away from that at the start.]

:14500 BCE
::[Cueball walks right looking back at the graph behind him. Megan walks in front of him pointing further right.]
::Cueball: Cool.
::Humans reach North America.

:14000 BCE
::The edge of the ice withdraws from New York City and retreats North.
::[A large glacier front speaks in a speech bubble with an arrow pointing at it. Behind is there are four peaks in the horizon and in front of it three small melting pools and some rocks on the ground.]
::Glacier: ''That’s it! I’m moving to Canada!''

:13500 BCE
::Humans domesticate dogs
::(Date uncertain, may be much earlier)
::[Megan and Cueball is watching a wolf looking at them.]
::Megan: Okay, you can live in our homes and we’ll feed you, but we’ll still get mad f you poop on the floor.
::Wolf: Deal.
::Cueball: And we get to breed you to be tiny and dress you in little costumes.
::Wolf: …Wait.

:13000 BCE
::[Randall did not use the normal spelling for Woolly Rhino, but this is an accepted alternative spelling:]
::Wooly Rhino goes extinct
::Oregon is scoured by huge floods as glacial dams burst and lakes of meltwater flow to the sea

:12500 BCE
::Ice sheets withdraw from Chicago

:12000 BCE
::Humans settle Abu Hureyra in Syria

:11500 BCE
::[An arrow on the left side of the dotted curve is pointing down along the dotted curve and to the left indicate temperature is declining again, meaning the dotted curve now moves left to colder temperatures. This only continues until 10500 BCE. It is only the second time something is noted on the left side after Megan at 16000 BCE]
::Temperatures start to decline, mainly in the Northern hemisphere
::This may be caused by changes in ocean circulation due to the floods of cold fresh meltwater flowing into the Atlantic as the North American ice sheet melts.
::This cooler period is called the Younger Dryas

:11000 BCE
::[This is the first text to the left of the dotted curve:]
::Humans reach Argentina

:10500 BCE
::[An arrow pointing down along the right side of the dotted curve and to the right indicate temperature is increasing again, meaning the dotted curve now moves right to hotter temperatures. This continues until 8000 BCE where it levels out just above 0°C.]
::Warming resumes
::Human settlements at Jericho

:10000 BCE
::First development of farming

:9500 BCE
::Saber-toothed cat goes extinct
::[To the left:]
::Horses disappear from North America

:9000 BCE
::[To the left, Randall spelled Pokémon wrong:]
:::Last North American Pokemon go extinct
:::[Cueball with a speak and Megan is looking up at this last “fact”.]
:::Megan: That is not a real fact.
::Temperatures reach modern levels
::Rising seas cut off the land bridge between North America and Asia
::Cattle domesticated

:8500 BCE
::Ice sheets retreat across the Canadian border
::Temperatures start to level out slightly above 1961-1990 levels

:8000 BCE
::[The above sentence breaks over the 8000 BCE line. From here a maximum in temperature on the chart is reached at 0.5°C which will not be overtaken until 2000 CE. It stays almost constant here until 5000 BCE where a slight cooling begins.]

:7500 BCE
::[To the left:]
::This warm, stable period is called the Holocene Climate Optimum
::[To the left:]
::Jiahu settled in China

:7000 BCE
::Final collapse of the North American ice sheet leads to rapid 2-4m sea level rise…
::[A small arrow points down and left to the right of the dotted curve. There is a small decrease in temperature but it is very small and would have been missed without the arrow and label.]
::…And a period of cooling in the Northern hemisphere

:6500 BCE
::[To the left:]
::As seas rise to near their modern levels, Britain is cut off from mainland Europe

:6000 BCE
::Humans develop copper metalworking

:5500 BCE
::[To the left:]
::Massive volcanic eruption in Oregon creates crater lake
::Gold metalworking

:5000 BCE
::[To the left:]
::Invention of the wheel
::[To the left. To the right of the dotted curve is an arrow pointing down and slightly left. From here temperature decreases very slowly but steadily from 0.5°C until 1000 BCE where a stable plateau is reached around 0°C.]
::Earth begins to cool slowly mainly due to regular cycles in its orbit

:4500 BCE
::[To the left:]
:: Proto-Indo-European language develops
:::[To the right of the curve Ponytail holds up a hand towards Cueball.]
:::Ponytail: Let’s make our language heavily inflected, so future students have to memorize a zillion verb endings!
:::Cueball: Okay!
::[To the left:]
::Permanent settlements in the fertile crescent

:4000 BCE
::Horses domesticated
::[To the left:]
::Minoan culture arises on Crete

:3500 BCE
::Egyptian mummification
::Rise of the Indus Valley civilization
::[To the left:]
::Invention of writing in Sumer “prehistory” ends, “history” begins
::Earliest human whose name we know
::(Pharaoh Iry-Hor in Egypt)

:3000 BCE
::''Three Sovereigns and five emperors'' period in China
::Gilgamesh
::[To the left:]
::Imhotep
::Mayan culture emerges
::[To the left:]
::Great Pyramid constructed

:2500 BCE
::Corded Ware culture in Europe
::[To the left of the curve two rock musicians with long hair and electrical guitars are standing on either side of a small gate made of three slabs of stone, one on top of the other two standing stones.]
::Stonehenge completed
::Chariots developed

:2000 BCE
::[To the left:]
::Alphabetic writing developed in Egypt
::Last mammoths on a tiny Siberian island go extinct
::[To the left:]
::Minoan eruption

:1500 BCE
::[To the left:]
::Iron smelting
::Olmec civilization develops in Central America
::[A Trojan horse with two Cueball-like guys in front and a third standing on its back. Its back is at three Cueball’s height and its head rises to the level of the Cueball on its back. It stands on a platform with four wheel on the visible side. There is text on the horse]
:::Setting of the ''Iliad'' and the ''Odyssey''
:::Text on horse: Not a trap
::[To the left:]
::Invasion of the Sea peoples*
::* A real thing
::Polynesians explore the Pacific Ocean

:1000 BCE
::[From 1000 BBC to 1000 CE the temperature is stable and very close to 0°C.]
::[To the left:]
::Solomon
::[Randall spelled Iliad wrongly this time:]
::Illiad and Odyssey composed
::[To the left:]
::Rise of Greek city-states
::Neo-Assyrian empire
::[To the left:]
::First Olympics
::Zapotec writing in modern Mexico
::[To the left:]
::Confucius

:500 BCE
::[To the left:]
::The stuff in the 300 (film)|movie ''300'', but regular speed and with more clothing
::Buddha
::Nazca Lines
::[To the left:]
::Alexander the Great
::[To the left:]
::Mayan hieroglyphics
::Ashoka the Great
::[To the left:]
::Paper invented
::[To the left:]
::Asterix
::Teotihuacán metropolis
::[To the left:]
::Julius Caesar

:[At the year 0, there is instead two numbers for each of the two scales before and after Christ:]
:1 BCE
:1 CE
::[To the left:]
::Roman Empire
::Jesus
::[To the left and erupting volcano.]
::Pompeii
::Three Kingdoms period
::[To the left:]
::Gupta empire
::[To the left:]
::Various groups take turns sacking Rome
::[Randall spelled Attila wrong:]
::Atilla the Hun

:500 CE
::Muhammad
::[To the left:]
::Tang Dynasty
::[An arrow to the right of the dotted curve pointing down, takes a swing far out from the curve and then bends back again. The text label next to it breaks into the next 500 period. The dotted curve stays stable at 0°C along this arrow.]
::Medieval warm period in Europe and some northern regions (too regional to affect the global average much)
::[To the left:]
::Leif Eriksson

:1000 CE
::[The dotted curve moves to the left towards lower temperature reaching a minimum around 1650 of about -0.6°C at the Little Ice Age.]
::[To the left a drawing of a compass with needle pointing the black end towards north east. There are labels for the four main directions and a label next to it:]
:::N
:::W E
:::S
:::Magnetic compass navigation
::[To the left:]
::Ghengis Khan
::Zheng He’s fleet explores Asia and Africa
::[To the left:]
::Aztec Alliance
::[To the left:]
::Printing press
::[To the left:]
::Columbus

:1500 CE
::European Renaissance
::[To the left:]
::Shakespeare

:1600
::[To the left:]
::Newton
::[To the right of the dotted curve there is an arrow pointing down that makes a swing in towards the curve and then back out again. At -0.6°C this is the coldest it has been since 9500 BCE. It is labeled:]
::”Little Ice Age”

:1700
::Steam engines
::[To the left:]
::Unites States Independence

:1800
::Industrial Revolution
::[To the left:]
::Telegraphs
::[After this the dotted curve becomes solid.]

:1900
::[To the left, and on the line for 1900:]
::Airplanes
::[To the left:]
::World Wars
::[The solid line takes a step to the right close to 0°C. Over the rest of the 1900s it moves closer to 0°C crossing it before 2000 where it almost reaches the maximum temperature of 0.5 °C from earlier in 8000 BCE.]
::Fossil fuel CO2 emissions start rapidly increasing
::[To the left:]
::Nuclear weapons
::[To the left:]
::Internet

:2000
::Northwest Passage opens
::[From here to present day the solid line increases rapidly and in 2016 present day is almost reaches 1°C, with about 0.8°C.]

:2016
::[To the left on the line for 2016:]
::Present day
::[From here the curve once again becomes dotted as this is the future. After one dot it splits in two and after the first two dots another split between them occurs forming three possible future dotted curves. The first curve bending down before the others, and thus to the right of the other two reaches about 1.2°C and then goes straight down and stops at the 2100 line. An arrow points to it from the left and a label is written patly before and the rest after the 2100 line to the left of the curve:]
::Best-case scenario assuming immediate massive action to limit emissions

:2100
::[The middle curve bends a little down after reaching 1.3°C and then continues this path reaching 2°C in 2100. An arrow point from below to it and a label is written below the curve and below 2100 line:]
::Optimistic scenario
::[The last line continues along the path from the last 16 years of the solid line reaching 4.2°C at 2100, almost as far on the other side of 0°C in 150 years as it took 14000 years to move from the other side from the start of the chart. Another arrow point to this from below with a label below the curve and below 2100 line:]
::Current Path

==Trivia==
*There have been several ''[[:Category:Large drawings|large drawings]]'' in the history of xkcd, some of which are bigger than this one (for instance [[1110: Click and Drag]]).
**Among those that can be viewed in one go, without downloading a larger file or moving around, this is by far the longest.
**The next longest is probably [[482: Height]].
*The timeline starts at 20,000 BCE (22,000 years ago) and ends at 2100 CE, thus covering 22,100 years.
*There are several spelling mistakes.
**Most obvious is the second time Randall wrote the word "Iliad," because he just spelled it correctly at 1500 BCE and then spelled it ''Illiad'' at 1000 BCE with two "L"s.
**Attila the Hun becomes ''Atilla the Hun'' with ''one'' T and ''two'' L's.
**Pokémon is spelled ''Pokemon'', but then again, that is not so strange for Randall (see [[1647: Diacritics]]). Despite that, he usually spells it correctly, as in [[1705|1705: Pokémon Go]].
**Note that the fact that woolly rhinoceros becomes ''Wooly rhino'' with only one l is not a spelling mistake but an alternative spelling of the word.
*The following notable facts are absent
**1850: methodical temperature record begins. However, this fact is indirectly indicated when the temperature curve becomes solid around 1850 and until present day.
**The entire swing period between 20 and 200 thousand years prior to now would depict temperature swings with increasing frequency and amplitude (ref geological record). But of course, this could not be included in a comic that only goes back to 20,000 BCE.
**During much of the 300 million years prior to that, the Earth was significantly warmer than now. However, the data's temporal precision decreases with age; seemingly abrupt changes millions of years ago might have happened over centuries or millennia. Hence, the older data is not usable to compare rates of change.

===Popularity of comic===
This comic became popular with a much broader audience than most xkcd comics. It was discussed admiringly by news sites such as [http://www.popsci.com/xkcd-earth-average-temperature-timeline Popular Science], [http://reason.com/blog/2016/09/14/send-around-this-xkcd-climate-change-web Reason], [http://www.slate.com/blogs/bad_astronomy/2016/09/13/xkcd_takes_on_global_warming.html Slate], [http://www.smithsonianmag.com/smart-news/new-comic-masterfully-shows-how-climate-has-changed-through-time-180960451/ Smithsonian], [http://www.forbes.com/sites/ericmack/2016/09/13/heres-22000-years-of-climate-changes-in-a-single-comic/ Forbes], [https://www.vox.com/2016/9/12/12891814/climate-change-xkcd-graphic Vox], [https://www.npr.org/sections/goatsandsoda/2016/09/14/493925781/epic-climate-cartoon-goes-viral-but-it-has-one-key-problem NPR], [https://qz.com/780391/xkcd-tells-the-entire-history-of-humanity-and-climate-change-in-one-cartoon-chart/ Quartz], [https://www.sciencealert.com/why-4-5-million-years-of-fluctuating-global-temperatures-can-t-explain-climate-change-today Science Alert] and [https://www.climatecentral.org/news/climate-change-xkcd-comic-20696 Climate Central]. It was promoted by famous individuals such as [https://twitter.com/elonmusk/status/775632728548970500 Elon Musk] and even [https://twitter.com/unfccc/status/776129715799224320 twitted by the UN council on Climate Change], and obviously hated on by vocal {{rw|climate_change|climate change deniers}} and {{rw|crank|cranks}} such as [https://www.reddit.com/r/dataisbeautiful/comments/53poul/josh_takes_on_xkcds_climate_timeline/ Anthony Watts]{{rw|Anthony_Watts|debunked}} and [http://joannenova.com.au/2016/09/how-to-make-climate-graphs-look-scary-a-reply-to-xkcd/ Joanne Nova]{{rw|Joanne_Nova|debunked}}

Saying the "dotted line comes from computer models" is a bit inaccurate. Prehistoric temperature reconstructions are based on lots of measurements from lots of places around the planet: ice cores, lake and ocean sediments, etc. which are the best proxy records of climate change. From those measurements, one infers temperature, so [[Randall Munroe]] [https://www.scpr.org/news/2016/09/15/64670/epic-climate-cartoon-goes-viral-but-it-has-one-key/#comment-2900724860 may be more correct than he realises]. Calling that process computer modeling stretches the meaning of the phrase. For more {{rw|rationalist}} critique of this chart not driven by the agenda of pushing {{rw|pseudoscientific}} beliefs which are against the worldwide consensus, see [https://www.climatecentral.org/news/climate-change-xkcd-comic-20696 t][https://reason.com/2016/09/14/send-around-this-xkcd-climate-change-web/ h][https://www.npr.org/sections/goatsandsoda/2016/09/14/493925781/epic-climate-cartoon-goes-viral-but-it-has-one-key-problem i][https://www.scpr.org/news/2016/09/15/64670/epic-climate-cartoon-goes-viral-but-it-has-one-key/ s] and most insightfully, [https://scienceblogs.com/gregladen/2016/09/13/everybody-always-gets-this-wrong-even-smart-people this].

*Due to increased interest, Randall decided to push the release of the next comic [[1733: Solar Spectrum]] one day back for a rare [[:Category:Thursday comics|Thursday release]] instead of the scheduled [[:Category:Wednesday comics|Wednesday release]].
**He [http://web.archive.org/web/20160915101125/http://xkcd.com/ noted this] above [[:image:1732_Earth_Temperature_Timeline_header_text_changed_for_all_comics.png|all the comics]] in the [[:image:1732_Earth_Temperature_Timeline_header_text_changed.png|header text on xkcd]]:
::''Note: Since a lot of new people are here looking for this chart today,''
::''I'll be posting Wednesday's comic on Thursday instead.''
:*Before that, the [http://web.archive.org/web/20160912181546/https://xkcd.com/ normal heading] with the release day of xkcd was shown.
:*This was (of course) still there Tuesday the [http://web.archive.org/web/20160913231501/http://xkcd.com/ day after] the release, because it was first on Wednesday there were reason to note the delay.
:*It stayed in place even [[:image:1732_Earth_Temperature_Timeline_header_text_changed_also_when_next_comic_was_released.png|for some time after]] the "Wednesday" comic was released on Thursday, but was [http://web.archive.org/web/20160915154605/http://xkcd.com/ then removed] before [[:image:1732_Earth_Temperature_Timeline_header_text_back_to_normal_shortly_after_next_comic_was_released.png|noon (EST)]] on Thursday.
:**Randall did thus not post a link to this comic in the header text for new visitors to use, only giving them that one extra day.
:*Even though the next comic was released on a Thursday, the scheduled Friday comic [[1734: Reductionism]] was still released as planned.
:**This was also the first time this occurred on xkcd - see [[1734:_Reductionism#Trivia|this trivia item]] from the Friday comic.
*On 2019-3-1, this comic became one of the six [[Design of xkcd.com|footer]] comics.
==== Removal of warning and footnote ====
*This comic's popularity was possibly the reason that both the more-than-10-year-old [[xkcd warning]] as well as the [[footnote#Original_footnote|original footnote]] was [[footnote#Removal_of_original_footnote|removed]] on the day of this comic's release.
**The next footnote was added 22 days later.

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Large drawings]]
[[Category:Charts]]
[[Category:Timelines]]
[[Category:Line graphs]]
[[Category:Maps]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Hairy]]
[[Category:Comics featuring real people]] 
[[Category:Multiple Cueballs]]
[[Category:Climate change]]
[[Category:Science]]
[[Category:Animals]]
[[Category:Music]] 
[[Category:Fiction]] 
[[Category:Sport]] 
[[Category:Religion]] 
[[Category:Internet]]
[[Category:Pokémon]]
[[Category:Footer comics]]
[[Category:Puns]] 
[[Category:Volcanoes]]
[[Category:Nuclear weapons]]

2485: Nightmare Code

2021-07-07T07:04:02Z

Pascal: The letters themselves are not shown.

{{comic
| number = 2485
| date = July 5, 2021
| title = Nightmare Code
| image = nightmare_code.png
| titletext = Charsets even used to be known as 'alpha-bets' before that word's obvious negative associations caused it to die out.
}}

==Explanation==
{{incomplete|Created by a SCARY ONGOING NANOBOT SWARM, for real human behaviors are so useful! Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
Although not directly mentioned, this comic is another in a [[:Category:COVID-19|series of comics]] related to the {{w|2019–20 coronavirus outbreak|2020 pandemic}} of the {{w|coronavirus}} {{w|SARS-CoV-2}}, which causes {{w|COVID-19}}.

It is the (far) future and, due to the mists of time, humans seem to have generally forgotten the Greek language. Its writing system survives in the public consciousness only as a means of assigning names to nightmarish phenomena.

A person using futuristic technology is giving a presentation or lecture. The content of his projected screen includes the names of the first four letters of the Greek alphabet, which he refers to as the Nightmare Code. The presenter expects that the list is familiar to his audience, but that it is novel information to them that it used to have a purpose other than providing arbitrary names to hurricanes, virus variants, and nanobot swarms.

Atlantic Hurricanes and tropical storms are {{w|Tropical_cyclone_naming|named}} once they have sustained wind speeds of 33 knots (61 km/h; 38 mph) or more. The names for these storms go from A-W each year (each letter has a name randomly chosen from a predefined list), with {{w|Tropical_cyclone_naming|21 names allocated each yearly period}}. When the 21 names are exhausted, Greek letters were once used to continue naming storms as needed, although the World Meteorological Organization decided not to use Greek letters when naming storms from 2021 onward. Perhaps in this vision of the future, the naming lists have given way to using the Greek alphabet exclusively.

Virus variants may also be {{w|Variants_of_SARS-CoV-2|given names}} once they are deemed sufficiently nightmarish. At the time of this writing, eleven variants of {{w|SARS-CoV-2}} have been labeled with Greek letters. Previously, variants were named informally for the region in which they were identified (as were many viruses themselves), but this practice has ceased due to risks of discrimination and the {{w|perverse incentive}} of countries to suppress health information for the sake of saving face. A place may become (in)famously known as the origin of a disease by such a name, even if it originated elsewhere; an example is {{w|Spanish flu}}, which was actually first observed in Kansas, USA. Nowadays vague names such as 'bird flu' or partly-informed geographic names tend to be better referenced by their {{w|hemagglutinin}} and {{w|neuraminidase}} subtypes, such as "H1N1" and "H9N2". The more technical coronavirus identification system uses a term such as "lineage B.1.617.2", whose awkwardness makes it unlikely to replace better-known names such as the "Kent variant" or "Indian variant".

Another set of historic nightmares the audience clearly knows about, which are still in our own future, are nanobot swarms, presumably nanoengineering failures and/or deliberate misuses of nanotechnology of the {{w|Gray goo}} type. Significant recurring or sequential events have seemingly earned the need to differentiate their outbreaks, and Greek letters have been used to do this. One may even be tempted to speculate that the futuristic figure and his presentation equipment float in space because the Earth has been rendered uninhabitable as a result of one or more of said nanotechnology disasters.

The cultural forgetfulness about the neutral basis of the old letters, after perhaps who-knows-what nanobot disasters that may have scoured the Earth clean of all things Greek, has led to no other common use for them ''except'' for their use in identifying far too many crises. The words themselves thus are instantly associated to bad times for almost everyone.

The title text indicates that future people stopped using the term "alphabet" (which derives from the first two elements of the Greek alphabet) due to negative associations of the word "alpha" and "bet(a)" which caused the word Alphabet to fall out of casual use in the future. It is now called Charset, for character sets.

==Transcript==
:[A Cueball-like person is giving a presentation while wearing futuristic gear, including a visor with an antenna rising from it, a backpack-like appliance of some kind, and a futuristic pointer. The audience is not pictured. The presenter is floating rather than standing. The presentation is projected from a small device near the bottom of the frame, and the appearance of the presentation suggests it is a hologram. The content of the slide shows the names of the first four letters of the Greek alphabet:]
:Alpha
:Beta
:Gamma
:Delta

:Presenter: We all know the '''''Nightmare Code''''', used to assign neutral names to scary ongoing lists, such as hurricanes, virus variants, and nanobot swarms.
:Presenter: But did you know it actually originated as the letters of an ancient Earth language?

{{comic discussion}}

[[Category:COVID-19]]
[[Category:Language]]
[[Category:Artificial Intelligence]]
[[Category:Hurricanes]]
[[Category:Biology]]

2478: Alien Visitors 2

2021-06-18T14:19:02Z

Pascal: /* Explanation */ Tetraethyllead & Juicero

{{comic
| number = 2478
| date = June 18, 2021
| title = Alien Visitors 2
| image = alien_visitors_2.png
| titletext = "Although fresh juice DOES sound--" "NO! For humanity to survive we must learn from the mistakes of the past."
}}

==Explanation==
{{incomplete|Created by a BOT. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
[https://en.wikipedia.org/wiki/Tetraethyllead Tetraethyllead]
[https://en.wikipedia.org/wiki/Juicero Juicero]

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2391: Life Before the Pandemic

2020-11-27T17:10:48Z

Pascal: /* Grilling in the Library */ s/read/concentrate

{{comic
| number = 2391
| date = November 27, 2020
| title = Life Before the Pandemic
| image = life_before_the_pandemic.png
| titletext = I can't wait until this is all over and I can go back to riding my horse through the mall.
}}

==Explanation==
{{incomplete|Created by a STUPID CLAW. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}

This is another comic in xkcd's [[:Category:COVID-19|series of comics]] about the COVID-19 pandemic. [[Megan]] and [[Cueball]] are having a conversation about life before the pandemic, which was declared as such on the 11th of March, 2020 by the World Health Organization. They talk about what they miss about life before the pandemic, but Cueball says that he can barely remember it, which is borne out by the rest of their discussion, as none of the activities they list were ever common and most are strange. After they finish reminiscing, Megan says that she can't wait for a vaccine, further implying that she she can't wait to have all of these things "back." Both Pfizer and Moderna are making vaccines, with Pfizer making their application for emergency use on November 20th, 2020, 7 days before this comic's release. It is expected to be approved for use by the end of the year.

===SCUBA diving without a mask===
SCUBA stands for Self-Contained Underwater Breathing Apparatus. It consists of a tank of compressed air, which is conducted through a tube to a mask which allows the diver to breath underwater. The mask is a fundamental part of SCUBA diving. Cloth masks, to help lower the spread of the virus between people, are a recommended precaution when in public. Megan is conflating these two different types of masks, misremembering a world where SCUBA diving did not have masks involved. You do not need to wear a cloth mask if you are SCUBA diving, but you do need to wear a SCUBA mask–irrespective of whether there is a pandemic.

===Free refills at Gas Stations===
Gas Stations are locations where you can buy gasoline, which powers internal combustion engines, especially those in cars. A "free refill," in this context, likely refers to getting the gas tank of your car filled for free, which was not a business practice that was ever common, and is the joke of this section. However, many gas stations also have a small convenience shop that accompanies them, where you can buy food, drinks, and can use the restroom. "Free refills" could refer to getting a free refill of a type of soft drink, which may happen in gas stations, but is mostly associated with restaurants and diners who allow free top-ups of inexpensive soft drinks (or tea/coffee), as a possible loss-leader, for those that potentially paying more for a substantive meal. The hospitality sector has been curtailed to various degrees, depending on local responses to the pandemic, and it's possible no outlets that offered free top-ups can continue to do so, or even operate an eat-in service at all.

===Grilling in the Library===
Grilling generally poses a significant fire hazard (and can produce toxic carbon monoxide) and is thus typically not allowed indoors, especially in libraries.

Grilling, however, also refers to "an intense interrogation or period of questioning."[https://www.lexico.com/definition/grilling] which can be done over the content of a book found in the library, but is probably not encouraged since most libraries enforce keeping quiet so others can concentrate.[https://www.quora.com/Why-should-we-be-silent-in-the-library]

===Tennis without a "safety" net===

{{w|Tennis}} is a sport where two players use racquets to hit a ball at each other. The game is played on a court divided in half by a low net. The net is not used for anyone's safety; it's to ensure that the ball must be volleyed to the other player with some minimum height. Megan seems to believe that the net is there to ensure that the players stay on opposite sides of the net, in order to lower the spread of the virus.

===Indoor Fireworks===
Many indoor activities were moved outdoors during the COVID-19 pandemic, as poorly-ventilated indoor spaces vastly increase the chance of the virus spreading. Fireworks are explosives shot into the air for entertainment, they are not suitable for use indoors.

Setting off fireworks indoors is not safe, even before the pandemic.{{Citation needed}} However, there are specially designed indoor fireworks.

===Arcade Claw Machines===

{{w|Claw crane|Arcade claw machines}} have a bin of prizes (often stuffed animals) with a claw mechanism hanging overhead. The player pays a few coins into the machine and maneuvers the claw over a desired prize. The claw will descend and "attempt" to grab the prize for retrieval, but to ensure a favorable revenue for the machine operator, there is often a hidden percentage chance that the claw will not fully close. This is a frustrating experience for the player (e.g. Cueball). Remote manipulator arms are used for handling dangerous items, but the arcade claw machine was not implemented for the purpose of safety.

===Title Text: Riding a Horse through the Mall===

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Megan and Cueball are having a conversation]
:Megan: What do you miss most about life before the Pandemic?
:Cueball: I can barely remember it.

:Megan: I miss going SCUBA diving without having to wear a mask.
:Cueball: I miss free refills at gas stations.
:Megan: I miss grilling in the Library.

:[Close-up on Megan, Cueball's voice comes from off-panel, to the right.]
:Megan: I miss when tennis players didn't have to have that safety net between them.
:Cueball: I miss indoor fireworks.

:[Return to seeing them both, they are now walking to the right while talking]
:Megan: I miss when arcades let you take toys from the bin with your hand instead of using that stupid claw.
:Cueball: Ugh, I hate that thing.
:Megan: I can't wait for a vaccine.

{{comic discussion}}
[[Category:COVID-19]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]

Talk:2328: Space Basketball

2020-07-05T00:52:02Z

Pascal: Seconds in 5 billion years

I'd just like to point out that this assumes cueball's odds of sinking a basket remain at 30% after hundreds/thousands of shots. One would think he would improve with practice.
[[Special:Contributions/162.158.62.75|162.158.62.75]] 23:53, 3 July 2020 (UTC)Duban
: Randall expresses as much in the title text. --[[User:NotaBene|NotaBene]] ([[User talk:NotaBene|talk]]) 00:00, 4 July 2020 (UTC)
: The psychological factor is another problem. The pressure of having reached a large number of shots will change how a person performs. Considering how sensitive the overall probability is to small variations in the success rate, this could have a dramatic effect, even if the overall free throw percentage doesn't change. [[Special:Contributions/172.69.70.15|172.69.70.15]] 05:23, 4 July 2020 (UTC)

Cueball's odds of 30 consecutive baskets are 0.3^30 = 2.06*10^-16. Earth is hit by about 6100 meteors per year, and a basketball hoop has a radius of 9 inches. Using that it will be hit about once every 5.09*10^11 years. In order for it to be even, Cueball would have to do approximately one trial every 55 minutes. Since he'll start over each time he misses, it works out to once attempt every 38.6 minutes. [[User:DanielLC|DanielLC]] ([[User talk:DanielLC|talk]]) 00:36, 4 July 2020 (UTC)

(?Almost) no-one in recorded history has been killed by a meteor, so the estimate of 1 in 250,000 is based on a very small chance of a very large number of people dying from something like a "Dinosaur Killer" object, which would not fit through the hoop.

Ok. Area of hoop: 0.166 square meters. Area of earth: 510 million square kilometers, or about 3x10^15 hoops. The Planetary Science Institute thinks 500 meteorites per year; Cosmos magazine think 6100 per year (which will essentially all be small enough to go through the hoop). So we get 5x10^11 or 6x10^12 years for space to score. If Cueball had to do multiple sets of 30 throws and wait until one of those sets was all successes he'd take 5x10^15 attempts, so 1000 or 10,000 attempts per year for a fair game. Which seems ok.

On the other hand, suppose that any 30 consecutive success counts. In that case the waiting time is shorter, but not much shorter. [This](https://math.stackexchange.com/questions/893941/distribution-of-maximum-run-length-of-independent-multinomial-trials) suggests the average time for any 30 consecutive is the same as the average time for batches of 29 when you need to get all 29 in a batch. So the difference is smaller than uncertainties/approximations we're already ignoring

Since almost all meteors are incinerated and reduced to dust upon contact with the earth's atmosphere, it stands to reason that there may already be a (teeny-weeny bit of a) meteor already passing through the hoop. [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 02:40, 4 July 2020 (UTC)

Technically it's still a meteor as it's being put through the hoop. The definition of a meteorite is a meteor that has *reached the surface* and made it through the atmosphere. The basketball hoop is not the surface. It is still a point in the atmosphere. Magma at any arbitrary point before it flows or erupts out of a vent (10 feet before the vent, for example, the same height as the rim of the basket on a regulation hoop) is still called magma and not lava. Therefore the entry should note this and refer to the meteors as such and not improperly as meteorites as the current note does. [[Special:Contributions/108.162.216.124|108.162.216.124]] 07:32, 4 July 2020 (UTC)
: This is what I was going to say, more or less. Though with the additional pondering of hoop-height to atmosphere depth (roughly) proportional to chance of a hoop-scorer attaining "-ite" status soon after. And then *something* *something* about the inherent status of a rim-shot (the chances being an interesting additional function of hoop diameter and the (surviving) cross-sectional width - and what if the latter exceeds the former?)... [[Special:Contributions/162.158.154.71|162.158.154.71]] 10:01, 4 July 2020 (UTC)
:There seems to be some debate about the terminology. I can find definitions that would make it a meteor (meteoroid in space, meteor in the atmosphere, meteorite on the ground) or a meteoroid (if a meteor is the light show rather than the rock itself). [[User:Angel|Angel]] ([[User talk:Angel|talk]]) 12:52, 4 July 2020 (UTC)

According to https://www.nasa.gov/astronauts/pettit_chron_10.html a 2001 study estimated the meteorite fall rate to one meteorite per million square kilometers per year, which yields an expected value of ~6e+12years to score for space. The Cosmos magazine article mentioned above may draw from the same source.

What about micrometeors? As I understand, they are a lot more common. [[User:Divad27182|Divad27182]] ([[User talk:Divad27182|talk]]) 16:46, 4 July 2020 (UTC)

The explanation currently says "there are approximately 6 quadrillion seconds remaining in the expected lifetime of the Sun (5 billion years)". I don't understand where this comes from. My math says 5 billion years is around 158 quadrillion seconds. [[User:Pascal|Pascal]] ([[User talk:Pascal|talk]]) 00:52, 5 July 2020 (UTC)

2319: Large Number Formats

2020-06-12T23:56:58Z

Pascal: /* Explanation */ 1,262,998,704,860 score and four

{{comic
| number = 2319
| date = June 13, 2020
| title = Large Number Formats
| image = large_number_formats.png
| titletext = 10^13.4024: A person who has come back to numbers after a journey deep into some random theoretical field
}}

==Explanation==
{{incomplete|Created by ABRAHAM LINCOLN. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
This comic shows how different people express large numbers.

'''25,259,974,097,204'''
The first normal person writes out the number in its entirety, but puts commas to indicate powers of 1000.

'''25 trillion'''
The second normal person says the number in English, but approximates it to 2 significant figures so it won't be too long.

'''25 billion'''
In most English, an n-illion means 10^(3n+3), so a trillion means 10^12. However, in older British English, an n-illion means 10^(6n), so a billion means 10^12.

'''2.526*10^13'''

{| class="wikitable"
|-
! Number
! Type of person
! Notes
|-
| 25,259,974,097,204
| Normal Person
| This is the full number, written out in the normal fashion.
|-
| 25 Trillion
| Normal Person
| This is the number, rounded to trillions in the normal fashion.
|-
| 25 Billion
| Old British Person
| British English sometimes still uses "Billion" to mean "Million Million" (A thousand million is a "milliard").
|-
| 2.5997x1013
| Scientist trying to avoid rounding up
| Using as many decimal places as necessary until hitting a digit (0-4) that results in rounding down, even if it goes against the common scientific practice of reporting the correct amount of "significant figures". Although, in so doing they seem to have lost a couple digits.
|-
| 25,259,973,541,888
| Software developer who forgot about floats
| This is the number after being converted to the limited precision of a 32-bit float.
|-
| 1013
| Astronomer
| For extremely large distances, astronomers typically only care about orders of magnitude, i.e. 10^13, not 10^12 or 10^14. Randall often jokes about the lack of precision needed by astronomers, such as in that one xkcd (#2205) where the astronomer-cosmologist is equally willing to make pi equal to one, or ten. The original number is rounded to the nearest power of ten.
|-
| 1,262,998,704,860 score and four
| Abraham Lincoln
| In the {{W|Gettysburg Address}}, he speaks the number "87" as "four score and seven" ("score" meaning "20"). The original number is rewritten in "score" (multiples of 20) plus a remainder (four).
|}
Title text: It is uncommon in conventional mathematics to raise 10 (or any integer) to such an oddly precise power, or to see "serious" papers doing so. Instead, numbers are typically converted to one of the formats already discussed in the comic. This might be a nod to articles about fields such as statistics or number theory in which one deals with very large numbers, and then attempts to bring them back to the realm of "understandable" numbers (such as Isaac Asimov in the short non-fiction article "Skewered!" - google it).

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2319: Large Number Formats

2020-06-12T23:55:42Z

Pascal: /* Explanation */ 2.5997x1013

{{comic
| number = 2319
| date = June 13, 2020
| title = Large Number Formats
| image = large_number_formats.png
| titletext = 10^13.4024: A person who has come back to numbers after a journey deep into some random theoretical field
}}

==Explanation==
{{incomplete|Created by ABRAHAM LINCOLN. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
This comic shows how different people express large numbers.

'''25,259,974,097,204'''
The first normal person writes out the number in its entirety, but puts commas to indicate powers of 1000.

'''25 trillion'''
The second normal person says the number in English, but approximates it to 2 significant figures so it won't be too long.

'''25 billion'''
In most English, an n-illion means 10^(3n+3), so a trillion means 10^12. However, in older British English, an n-illion means 10^(6n), so a billion means 10^12.

'''2.526*10^13'''

{| class="wikitable"
|-
! Number
! Type of person
! Notes
|-
| 25,259,974,097,204
| Normal Person
| This is the full number, written out in the normal fashion.
|-
| 25 Trillion
| Normal Person
| This is the number, rounded to trillions in the normal fashion.
|-
| 25 Billion
| Old British Person
| British English sometimes still uses "Billion" to mean "Million Million" (A thousand million is a "milliard").
|-
| 2.5997x1013
| Scientist trying to avoid rounding up
| Using as many decimal places as necessary until hitting a digit (0-4) that results in rounding down, even if it goes against the common scientific practice of reporting the correct amount of "significant figures". Although, in so doing they seem to have lost a couple digits.
|-
| 25,259,973,541,888
| Software developer who forgot about floats
| This is the number after being converted to the limited precision of a 32-bit float.
|-
|
| Astronomer
| For extremely large distances, astronomers typically only care about orders of magnitude, i.e. 10^13, not 10^12 or 10^14. Randall often jokes about the lack of precision needed by astronomers, such as in that one xkcd (#2205) where the astronomer-cosmologist is equally willing to make pi equal to one, or ten. The original number is rounded to the nearest power of ten.
|-
|
| Abraham Lincoln
| In the {{W|Gettysburg Address}}, he speaks the number "87" as "four score and seven" ("score" meaning "20"). The original number is rewritten in "score" (multiples of 20) plus a remainder (four).
|}
Title text: It is uncommon in conventional mathematics to raise 10 (or any integer) to such an oddly precise power, or to see "serious" papers doing so. Instead, numbers are typically converted to one of the formats already discussed in the comic. This might be a nod to articles about fields such as statistics or number theory in which one deals with very large numbers, and then attempts to bring them back to the realm of "understandable" numbers (such as Isaac Asimov in the short non-fiction article "Skewered!" - google it).

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2319: Large Number Formats

2020-06-12T23:54:26Z

Pascal: /* Explanation */ wrong number

{{comic
| number = 2319
| date = June 13, 2020
| title = Large Number Formats
| image = large_number_formats.png
| titletext = 10^13.4024: A person who has come back to numbers after a journey deep into some random theoretical field
}}

==Explanation==
{{incomplete|Created by ABRAHAM LINCOLN. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
This comic shows how different people express large numbers.

'''25,259,974,097,204'''
The first normal person writes out the number in its entirety, but puts commas to indicate powers of 1000.

'''25 trillion'''
The second normal person says the number in English, but approximates it to 2 significant figures so it won't be too long.

'''25 billion'''
In most English, an n-illion means 10^(3n+3), so a trillion means 10^12. However, in older British English, an n-illion means 10^(6n), so a billion means 10^12.

'''2.526*10^13'''

{| class="wikitable"
|-
! Number
! Type of person
! Notes
|-
| 25,259,974,097,204
| Normal Person
| This is the full number, written out in the normal fashion.
|-
| 25 Trillion
| Normal Person
| This is the number, rounded to trillions in the normal fashion.
|-
| 25 Billion
| Old British Person
| British English sometimes still uses "Billion" to mean "Million Million" (A thousand million is a "milliard").
|-
|
| Scientist trying to avoid rounding up
| Using as many decimal places as necessary until hitting a digit (0-4) that results in rounding down, even if it goes against the common scientific practice of reporting the correct amount of "significant figures". Although, in so doing they seem to have lost a couple digits.
|-
| 25,259,973,541,888
| Software developer who forgot about floats
| This is the number after being converted to the limited precision of a 32-bit float.
|-
|
| Astronomer
| For extremely large distances, astronomers typically only care about orders of magnitude, i.e. 10^13, not 10^12 or 10^14. Randall often jokes about the lack of precision needed by astronomers, such as in that one xkcd (#2205) where the astronomer-cosmologist is equally willing to make pi equal to one, or ten. The original number is rounded to the nearest power of ten.
|-
|
| Abraham Lincoln
| In the {{W|Gettysburg Address}}, he speaks the number "87" as "four score and seven" ("score" meaning "20"). The original number is rewritten in "score" (multiples of 20) plus a remainder (four).
|}
Title text: It is uncommon in conventional mathematics to raise 10 (or any integer) to such an oddly precise power, or to see "serious" papers doing so. Instead, numbers are typically converted to one of the formats already discussed in the comic. This might be a nod to articles about fields such as statistics or number theory in which one deals with very large numbers, and then attempts to bring them back to the realm of "understandable" numbers (such as Isaac Asimov in the short non-fiction article "Skewered!" - google it).

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2182: When I'm Back at a Keyboard

2019-07-29T16:31:16Z

Pascal: /* Explanation */ start

{{comic
| number = 2182
| date = July 29, 2019
| title = When I'm Back at a Keyboard
| image = when_im_back_at_a_keyboard.png
| titletext = [after typing 1,500 words on feathered dinosaurs, paleontology, sexism, lava, and dinosaurs as animals rather than movie monsters] Sorry to cut it short, I'm on my phone. When I'm back at a keyboard, I can give you another 5,000 words.
}}

==Explanation==
{{incomplete|Created by someone who is away from their keyboard. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
A long time ago, before smartphones, people used to type on a "computer keyboard", a bulky device with a key for each individual letter. Older people often have trouble adjusting to the modern handheld keyboard.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
[Cueball walking and texting on a cellphone.]
:Cueball (texting): Sure, I can reply once I'm back at a keyword and can type more easily.

:Caption: I say this a lot for someone who routinely types thousands of words in text message conversations when someone brings up ''Jurassic Park''.

{{comic discussion}}

2122: Size Venn Diagram

2019-03-12T02:56:09Z

Pascal: /* Explanation */ add missing quote

{{comic
| number = 2122
| date = March 11, 2019
| title = Size Venn Diagram
| image = size_venn_diagram.png
| titletext = Terms I'm going to start using: The Large Dipper, great potatoes, the Big Hadron Collider, and Large Orphan Annie.
}}

==Explanation==
{{incomplete|Created by a Large Terror. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
[[File:Symmetrical_5-set_Venn_diagram.svg|thumb|upright=0.5|{{w|Branko Grünbaum}}'s multi-set Venn diagram strategy from 1975, less symmetric than Randall's.]]
This comic is a {{w|Venn diagram}} illustrating the complete set of possible intersections of five different size adjectives: "little", "large", "small", "great" and “big”. Each unique intersection contains a short list of nouns that can be preceded by each of its intersecting adjectives.

For example, "flying fox" (a type of bat) appears at the intersection of "large", "small", and "great", because the species {{w|large flying fox}}, {{w|small flying fox}}, and {{w|great flying fox}} all exist, but there is no such species as a "big flying fox" or a "little flying fox". Similarly, humans have organs named the {{w|small intestine}} and {{w|large intestine}}, but no "little intestine", "great intestine", or "big intestine".

Some descriptors are applied in combination to their noun, rather than individually; for example, "planet" is placed in both the "little" and "big" groups in reference to the 2008 video game ''{{w|Little Big Planet}}''.

In the title text, Randall declares that he will start intentionally using term combinations that don't appear in the above diagram, presumably to confuse people.

A similar concept can be seen in [[181: Interblag]], but in a tabular form rather than a Venn diagram.

===List of items in the diagram===
The following table lists all size/noun combinations that the Venn diagram can generate, with a description of each.
{| class="wikitable"
!Item
!Big !! Great !! Large !! Little !! Small
|-
|'''Aunt'''
|
| [[wiktionary:great-aunt|sister of one's grandparent]]
|
|
|
|-
|'''Bang Theory'''
|currently-accepted {{w|Big Bang|scientific theory}} that explains the origin of the universe; also a {{w|The Big Bang Theory|TV sitcom}}|| || || ||
|-
|'''Barrier Reef'''
|
|{{w|Great Barrier Reef|world's largest coral reef system}}, off the coast of Australia
|
|
|
|-
|'''Bear Lake'''
|a {{w|Big Bear Lake, California|lake and surrounding community in California}}, in the mountains
|a {{w|Great Bear Lake|lake in Canada}}, in the Northwest Territories -- the largest lake entirely in Canada, and the fourth-largest in North America
|
|
|
|-
|'''Bend'''
| {{w|Big Bend|several geographic locations}}, including a {{w|Big Bend National Park|US National Park}} in Texas
| {{w|Great Bend (disambiguation)|several geographic locations}}, including a {{w|Big Bend, Kansas|city in Kansas}} and the description of the S-shaped curving of the {{w|Nile River}} in Egypt and Sudan
|
|
|
|-
|'''Billed Seed Finch'''
|
|{{w|Great-billed seed finch|species of finch}}, described in 1851
|{{w|Large-billed seed finch|species of finch}}, described in 1789
|
|
|-
|'''Blue'''
|nickname for [https://www.ibm.com IBM] and the {{w|New York Giants}}, also [https://www.imdb.com/title/tt0095250 a movie]
|
|{{w|large blue|various different butterflies}}
|
|{{w|small blue|butterfly}}, smallest found in the UK
|-
|'''Blue Heron'''
|
|{{w|Great Blue Heron|species of heron}} that measures 91–137 cm (36–54 in) long
|
|{{w|Little Blue Heron|species of heron}} that measures about 60 cm (24 in) long
|
|-
|'''Board'''
| nickname for the {{w|New York Stock Exchange}} || || || ||
|-
|'''Cardiac Vein'''
|
|{{w|Great cardiac vein|left coronary vein}}
|
|
|{{w|Small cardiac vein|heart vein on the right side}}
|-
|'''Circle'''
|
|{{w|Great circle|largest possible circle}} that can be drawn on a sphere; the {{w|equator}} is an example of one on the Earth
|
|{{w|Little_Circle|The Little Circle}}, a group of political reformists based in Manchester, UK in the early 1800s
|{{w|Circle_of_a_sphere|a circle that lies on a sphere}} without passing through its center (which would make it a great circle)
|-
|'''Claims Court'''
|
|
|
|
|{{w|Small claims court|judicial court}} that handles cases involving only relatively small amounts of money
|-
|'''enchilada'''
|[[wiktionary:big enchilada|important person]] || || || ||
|-
|'''Depression'''
|
|{{w|Great Depression|period of prolonged economic downturn}} that affected the world economy in the 1930's
|
|
|
|-
|'''Dipper'''
|{{w|Big Dipper|subset collection of stars}} in the constellation {{w|Ursa Major}}
|
|
|name for the constellation {{w|Ursa Minor}}
|
|-
|'''Emerald'''
|
|
|{{w|Large_emerald|Geometra papilionaria}}, a bright green moth of the family {{w|Geometer_moth|Geometridae}}
|{{w|Jodis_lactearia|Jodis lactearia}}, a light green or white moth of the family {{w|Geometer_moth|Geometridae}}
|{{w|Hemistola_chrysoprasaria|Hemistola chrysoprasaria}}, a light green or yellow-white moth of the family {{w|Geometer_moth|Geometridae}}
|-
|'''End'''
|The bearing connecting a connecting rod to the crank shaft of a reciprocating engine.
| {{w|Great End|Mountain in England}}
|
|
|The bearing connecting a connecting rod to the gudgeon pin and hence the piston in a reciprocating engine.
|-
|'''Eyed Conger'''
|eel
|
|eel
|
|eel
|-
|'''Flying Fox'''
|
|{{w|Great flying fox}}
|{{w|Large flying fox}}
|
|{{w|Small flying fox}}
|-
|'''Foot'''
|The well known folk-lore monster ''{{w|Bigfoot}}''
|
|
|Main character in the ''{{w|Land Before Time}}'' film series
|''{{w|Smallfoot (film)|Smallfoot}}'' is an animated film that inverts the Bigfoot legend, focusing on a group of yetis that tell stories about humans.
|-
|'''Forest Bat'''
|
|
|bat
|bat
|
|-
|'''Format'''
|
|
|{{w|Large format|anything larger than 4x5 inches in photography}}
|
|
|-
|'''Foundation'''
|The BIG Foundation is a 501c3 non-profit charity
|?
|?
|
|-
|'''Frog'''
|Slang for "boyfriend" (bf)
|
|?
|?
|?
|-
|'''Game'''
|Large animals hunted for sport or food, usually referring to the African {{w|big five game}} (lion, leopard, rhinoceros, elephant, cape buffalo); can also refer to the NFL's {{w|Super Bowl}}
|{{w|Great Game|19th Century geopolitical competition}} between the British and Russian Empires over control of Afghanistan
|Large animals hunted for sport or food, such as bears or moose
|
|Small animals hunted for sport or food, such as rabbits or ducks
|-
|'''Hadron Collider'''
|
|
|{{w|Large Hadron Collider|particle accelerator}}
|
|
|-
|'''Hearted'''
|{{w|https://en.wiktionary.org/wiki/bighearted#English|kind, generous, selfless, noble}}
|{{w|https://en.wiktionary.org/wiki/greathearted|generous, selfless, noble}}
|{{w|https://en.wiktionary.org/wiki/largehearted|generous, benevolent, noble}}
|
|
|-
|'''House on the Prairie'''
|
|
|
|{{w|Little House on the Prairie|novel}} (later made into a TV show)
|
|-
|'''Intestine'''
|
|
|gut
|
|gut
|-
|'''Island'''
|{{w|Big Island|largest island in Hawaii}}
|{{w|Great Island|in Cork Harbour, Ireland}}
|{{w|Large Island|island in the Antilles, owned by Grenada}}
|{{w|Little Island|several islands named such}}, plus a song in ''{{w|Randy Newman's Faust}}''
|{{w|Small Island (novel)|novel which was made into a movie}}
|-
|'''League'''
|Nickname for top-level competition
|?
|
|{{w|Little League Baseball|Youth baseball organization}}
|
|-
|'''Lies'''
|{{w|Big Little Lies (TV series)|Big Little Lies}}, a novel made into a TV series; also a [[wiktionary:big lie|form of propaganda]]
|
|{{w|Big Little Lies (TV series)|Big Little Lies}}, a novel made into a TV series; also a {{w|Little Lies|Fleetwood Mac song}}
|
|
|-
|'''Magellanic Cloud'''
|
|
|galaxy
|
|galaxy
|-
|'''Millimeter Telescope'''
|
|
|{{w|Large Millimeter Telescope|radio telescope}}
|
|
|-
|'''One'''
|Nickname for any large natural disaster that is expected to happen in the future, such as a tsunami or an earthquake in California
|Nickname for {{w|Wayne Gretzky}}, considered by many to be the greatest ice hockey player of all time, also comedian {{w|Jackie Gleason}} and many other people ([https://en.wikipedia.org/wiki/The_Great_One Wikipedia disambiguation page]).
|
|affectionate term for a small person
|?
|-
|'''Orphan Annie'''
|
|
|
|{{w|Little Orphan Annie|comic strip}}
|
|-
|'''Planet'''
|Part of the video game ''{{w|Little Big Planet}}''
|
|
|Part of the video game ''{{w|Little Big Planet}}''
|
|-
|'''Potatoes'''
|
|
|
|
|[[wiktionary:small potatoes|something relatively unimportant]]
|-
|'''Pox'''
|
|an old name for {{w|syphilis}}
|
|
|{{w|smallpox|a deadly disease}} which was effectively eradicated by 1977
|-
|'''Professor'''
|
|
|{{w|Large Professor|rap artist}}
|{{w|Little Professor|educational math toy}} (also "Little Professor Syndrome", an informal name for autism)
|
|-
|'''Richard'''
|
|
|
|{{w|Little Richard|musician}}
|
|-
|'''Room'''
|
|{{w|Great room|a McMansion's signature space}}
|
|{{w|White_Blood_Cells_(album)#Track_listing|Track 6}} on "White Blood Cells," the third album by {{w|The_White_Stripes|The White Stripes}}
|?
|-
|'''Screen'''
|another name for movies
|
|
|
|another name for TV
|-
|'''Sister'''
|[[wiktionary:big sister|older female sibling]]
|
|
|[[wiktionary:little sister|younger female sibling]]
|
|-
|'''Soldiers'''
|
|
|
|?
|{{w|Small Soldiers|1998 movie}} about sentient animated toys at war
|-
|'''Sur'''
|{{w|Big Sur|coastal region of California}} famed for its mountain scenery
|
|
|
|
|-
|'''Terror'''
|
|{{w|Great Terror|One of two periods of violent political repression}}; one during {{w|Reign of Terror|the French Revolution}} between 1793 and 1794, the other in {{w|Great Purge|the Soviet Union under Josef Stalin}} between 1936 and 1938
|
|
|
|-
|'''Time'''
|major
|
|
|
|minor
|-
|'''Toothed Aspen'''
|tree (bigtooth)
|
|tree
|
|
|-
|'''Wall of China'''
|
|{{w|Great Wall of China|Series of fortifications}} over 13,000 miles long that served to protect various Chinese empires from raids and invasion from their north
|
|
|
|-
|'''White'''
|{{w|Big White Ski Resort|ski resort in British Columbia}}
|{{w|Great white shark|species of shark}} or a {{w|Great White|rock band}}
|{{w|Pieris brassicae|a butterfly}} or {{w|Large White pig|a common breed of pig}}
|
|{{w|Dixeia|multiple species}} of {{w|Pieris rapae|butterflies}} are known as small whites
|-
|'''Wonder'''
|
|
|
|{{w|Little Wonder|"Little Wonder" is a song and single by David Bowie, from the 1997 album Earthling.}}
|{{w|Small Wonder (TV series)|American sitcom}}
|-
|'''World'''
|?
|?
|
|?
|Ride at Disneyland
|}

==Transcript==


:Big: Bang Theory, Enchilada, Board, Sur
:Little: Orphan Annie, House on the Prairie, Richard
:Large: format, Millimeter Telescope, Hadron Collider
:Small: claims court, potatoes
:Great: Barrier Reef, Wall of China, Depression, Terror, aunt

:Big/Great: Bend, Bear Lake
:Big/Small: time, screen
:Big/Little: Dipper, Planet, lies, sister
:Little/Great: Blue Heron
:Little/Large: Professor, Forest Bat
:Big/Large: Toothed Aspen
:Large/Small: intestine, Magellanic Cloud
:Little/Small: wonder, soldiers
:Small/Great: pox, cardiac vein
:Large/Great: Billed Seed Finch

:Big/Large/Great: hearted
:Big/Small/Great: end
:Big/Little/Small: foot
:Big/Little/Great: league
:Little/Large/Great: (none)
:Big/Little/Large: foundation
:Big/Large/Small: Eyed Conger, Blue
:Little/Large/Small: emerald
:Little/Small/Great: circle, room
:Large/Small/Great: flying fox

:Big/Large/Small/Great: game, white
:Big/Little/Small/Great : world, one
:Big/Little/Large/Great : (none)
:Big/Little/Large/Small : frog
:Little/Large/Small/Great : (none)

:Big/Little/Large/Small/Great: Island

{{comic discussion}}

2101: Technical Analysis

2019-01-21T06:48:39Z

Pascal: /* Explanation */ cryptocurrency

{{comic
| number = 2101
| date = January 21, 2019
| title = Technical Analysis
| image = technical_analysis.png
| titletext = "I [suspect] that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. I suspect that the immense power of the computer is being harnessed to this 'paper economy', not to do the same transactions more economically but to balloon the quantity and variety of financial exchanges." --James Tobin, July 1984
}}

==Explanation==
{{incomplete| Comic is still undergoing TECHNICAL ANALYSIS (this is just the prologue). Do NOT delete this tag too soon.}}

Technical analysis is field which attempts to study stocks, cryptocurrency, etc. statistically, seeking to profit off of the patterns that are found there.

The theoretical value of a stock is the sum of all its future earnings, with earnings in the future discounted appropriately to account for the [https://en.wikipedia.org/wiki/Time_value_of_money time value of money]. Because these earnings are never fully predictable, traders may have different ideas about the true value of a stock, and buy the stock if they believe the currently offered prices are particularly low, or sell it when the prices are high.

Technical analysis, however, does not even attempt to understand the earnings of the stock, instead focusing on the shapes and patterns that result from traders making their these moves. While there is a human behavioral component to stock trading, it is not clear that one can extract much information from the shapes of stock charts. To the extent it does work, a substantial part of its success may be simply an artifact of the herd behavior of traders who engage in technical analysis, a zero-sum game.

The comic displays a stock price chart, annotated with labels which purport to be technical analysis. These labels are nonsense: "allegro" (a musical term), "lumbar support" (the thing in a chair shaped to better support your back), "bathtub". One label celebrates that "these two points define a line! Promising signal." (In Euclidian geometry, any two points define a line.)

The mouseover text purports to be a quote from James Tobin (though it is not listed at Wikiquote) that raises a question of very talented people building systems to make themselves a lot of money without actually accomplishing anything worth money. This concern is perhaps not in and of itself about technical analysis, but more about the stock market and related trading ecosystems in general, in particular high speed traders. While is not always easy to understand why certain forms of market activity might be valuable, and hard to put a price tag on concepts like "risk," "liquidity" and "price discovery," sometimes people are just working to trick others into bad deals, or forcing market participants to pay them [https://en.wikipedia.org/wiki/Rent-seeking unearned money]. This may make the smart people a lot of money, but it does so by harming society, not helping it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2101: Technical Analysis

2019-01-21T06:42:55Z

Pascal: /* Explanation */ quote?

{{comic
| number = 2101
| date = January 21, 2019
| title = Technical Analysis
| image = technical_analysis.png
| titletext = "I [suspect] that we are throwing more and more of our resources, including the cream of our youth, into financial activities remote from the production of goods and services, into activities that generate high private rewards disproportionate to their social productivity. I suspect that the immense power of the computer is being harnessed to this 'paper economy', not to do the same transactions more economically but to balloon the quantity and variety of financial exchanges." --James Tobin, July 1984
}}

==Explanation==
{{incomplete| Comic is still undergoing TECHNICAL ANALYSIS (this is just the prologue). Do NOT delete this tag too soon.}}

Technical analysis is field which attempts to study stocks on the stock market statistically, seeking to profit off of the patterns that are found there.

The theoretical value of a stock is the sum of all its future earnings, with earnings in the future discounted appropriately to account for the [https://en.wikipedia.org/wiki/Time_value_of_money time value of money]. Because these earnings are never fully predictable, traders may have different ideas about the true value of a stock, and buy the stock if they believe the currently offered prices are particularly low, or sell it when the prices are high.

Technical analysis, however, does not even attempt to understand the earnings of the stock, instead focusing on the shapes and patterns that result from traders making their these moves. While there is a human behavioral component to stock trading, it is not clear that one can extract much information from the shapes of stock charts. To the extent it does work, a substantial part of its success may be simply an artifact of the herd behavior of traders who engage in technical analysis, a zero-sum game.

The comic displays a stock price chart, annotated with labels which purport to be technical analysis. These labels are nonsense: "allegro" (a musical term), "lumbar support" (the thing in a chair shaped to better support your back), "bathtub". One label celebrates that "these two points define a line! Promising signal." (In Euclidian geometry, any two points define a line.)

The mouseover text purports to be a quote from James Tobin (though it is not listed at Wikiquote) that raises a question of very talented people building systems to make themselves a lot of money without actually accomplishing anything worth money. This concern is perhaps not in and of itself about technical analysis, but more about the stock market and related trading ecosystems in general, in particular high speed traders. While is not always easy to understand why certain forms of market activity might be valuable, and hard to put a price tag on concepts like "risk," "liquidity" and "price discovery," sometimes people are just working to trick others into bad deals, or forcing market participants to pay them [https://en.wikipedia.org/wiki/Rent-seeking unearned money]. This may make the smart people a lot of money, but it does so by harming society, not helping it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

{{comic discussion}}

2005: Attention Span

2018-06-11T13:50:15Z

Pascal: /* Explanation */ Add example of book thicker than it is wide

{{comic
| number = 2005
| date = June 11, 2018
| title = Attention Span
| image = attention_span.png
| titletext = I didn't even realize they MADE a novelization of "Surf Ninjas." How did you-- Oh my god, it's signed by the author?!
}}

==Explanation==
{{incomplete|Created by a FASCIST TRAIN ENGINE - What is the dragon book? Also, discuss Megan's dissing. Do NOT delete this tag too soon.}}

People often groan about their shrinking attention span, attributing it to an increased illiteracy. This allows for fond nostalgia about the times when they were supposedly more intelligent and focused. Cueball does the same here, but Megan retorts that he spent six hours reading over a pointless (if disturbingly plausible) theory about a banal show based off a series of bedtime stories made to entertain small children. Cueball qualifies his statement: he has no attention span for anything good anymore. Megan, in reply, examines Cueball’s bookshelf, finding a book that cements Cueball’s status as a nerd who reads high fantasy. Cueball protests that the book is a classic, but Megan dismisses the fact.

To be fair to Cueball, many great fantasies have covers such as those in the comic (e.g. A Song of Ice and Fire, The Lord of the Rings, Randall’s personal favorite Discworld.) To be fair to Megan, this book is apparently not one of them, being thicker than it is wide (like The Complete Miss Marple by Agatha Christie), a telltale sign of needless bombast and turgid prose.

If there was any doubt about Cueball’s dubious literary tastes before, Megan dispels them in the title text, refering to a novelization of the excoriated movie Surf Ninjas, a movie that is, unfortunately, exactly what it sounds like. Signed novelizations of a movie named “Surf Ninjas” are not typical fodder for great minds.

The dragon book is possibly A Game of Thrones or A Dance With Dragons from the Song of Ice and Fire saga, His Majesty’s Dragon from the Temeraire series, or Dragonsbane from the Winterlands series.

The comic contains a hyperlink to an article with the same unfortunate content Cueball has apparently finished reading prior to this comic: [https://www.newyorker.com/culture/rabbit-holes/the-repressive-authoritarian-soul-of-thomas-the-tank-engine-and-friends The Repressive, Authoritarian Soul of “Thomas the Tank Engine & Friends”]

==Transcript==
:[Cueball and Megan are standing together.]
:Cueball: I haven't read any books in forever. I have no attention span anymore.

:Megan: Didn't you literally ''just'' spend six hours obsessively reading about the theory that ''Thomas the Tank Engine'' is authoritarian propaganda depicting a post-apocalyptic fascist dystopia?

:Cueball: OK
:Cueball: I mean I have no attention span for anything ''good'' anymore.
:Megan: Let's check out your bookshelf, shall we?

:Cueball: What are you-
:Megan (off-panel): I see a dragon holding a sword in its teeth on the cover of a book that's thicker than it is wide.
:Cueball: And? That's a ''classic!''
:Megan (off-panel): Just saying, I don't think this is a new development.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]

1982: Evangelism

2018-04-21T01:47:33Z

Pascal: /* Explanation */ Metric Conversion Act

{{comic
| number = 1982
| date = April 18, 2018
| title = Evangelism
| image = evangelism.png
| titletext = The wars between the "OTHER PRIMATES OPEN THEM FROM THE SMALL END" faction versus the "BUT THE LITTLE BIT OF BANANA AT THE SMALL END IS GROSS" faction consumed Europe for generations.
}}

==Explanation==
{{incomplete|Need a citation for primates opening bananas from the “other end”. Do NOT delete this tag too soon.}}

{{w|Evangelism}}, in {{w|Christianity}}, is the commitment to or act of publicly preaching of the {{w|Gospel}} with the intention of spreading the message and teachings of Jesus Christ. It is famously done door-to-door by the {{w|Jehovah’s Witnesses}}, for whom this practice, called “field ministry”, is paramount.

“Evangelism” is also defined as any zealous advocacy for a cause, religious or not. In this comic, [[Randall]] presents a line plot where causes are listed, in increasing order, by the intensity of the evangelism of their advocates. The first punchline is that religious proselytizers, unexpectedly{{Citation needed}} are much less intense than advocates for such things as opening bananas from the other end—which is also the subject of the title text. The comic’s release date on April 18th, is likely correlated with this days assignment as the official [https://www.daysoftheyear.com/days/banana-day/ “Banana Day”] in the US. (Hoverer, at the time of release of this comic, this day was not mentioned on the Wikipedia {{w|List_of_food_days#United_States|list of food days in the US}}).

As the graph moves from left to right, the issues at stake have less and less impact on the life of someone who “converts”, but the intensity and fervor of those spreading the cause increases. This is counterintuitive, which is the joke.

Below, each of the points on the chart, as well as the title text, is discussed.

;''Religious proselytizers''
{{w|Proselytism|Religious proselytizers}} are the best known evangelists, and the term “evangelism” originally applied only to them. Christian faith remains roughly as popular as ever, but Christian ''evangelism'' has become less common and less accepted in the public sphere in recent decades, and often only practiced in specific venues. Randall contrasts them in this strip with four other groups which he finds to be more intense in their “evangelism”.

;''People who want the US to switch to metric''
Unlike most of the world, the US uses {{w|United States Customary Units|US customary units}} instead of {{w|metric units}}. Some people wish for this to change, to the point that the US Congress passed the {{w|Metric Conversion Act}} that U.S. President Gerald Ford signed into law on December 23, 1975.

Randall has made a conversion chart for helping US people with the confusing metric units: [[526: Converting to Metric]].

;''People who want the US to switch to metric but keep Fahrenheit''
Pro-metric people who wish to keep the {{w|Fahrenheit}} scale rather than change to {{w|Celsius}} are ranked as slightly more evangelic. A common argument for keeping the Fahrenheit scale is due to 0°F equating to “really cold” and 100°F to “really hot” when talking about weather. Fahrenheit also has smaller degrees than Celsius, so temperatures can be cited more precisely, if necessary, without the need to include fractional degrees. This also gives Fahrenheit the advantage that “decades” of temperatures are more useful as in saying the weather is in the 40s or the 70s, for instance. Because the Celsius degree is larger, the range of temperatures within any decade is wider and saying the temperature is in the 10s may not be as useful as it is a wider range of temperatures, compared to Fahrenheit.

To many people, making the shift only partially may immediately seem very silly—and yet the people arguing for this are even more ardent than those that wish to shift entirely, perhaps precisely because of this immediate strangeness. Also, if someone is being an SI purist, supporting a full shift to SI units, one could argue they should be advocating a switch to {{w|Kelvin}} as the unit of thermodynamic temperature, even though Celsius has the status of an {{w|SI derived unit}}.

Fahrenheit versus Celsius has been the topic of [[1643: Degrees]] and [[1923: Felsius]].

;''People who threw away their socks and bought all one kind''
The reason to do such a thing would be that any two socks in your drawer will match, saving time since they don't need to be matched or rolled/folded. It also reduces the likelihood of ending up with an unmatched sock—or a whole stack of them—in your drawer. This is a problem that [http://www.techtimes.com/articles/154000/20160427/science-reveals-why-you-always-lose-your-socks-in-the-laundry.htm scientists have researched].

To ordinary people, it immediately seems quite aesthetically boring to always wear the same color of socks or other clothing. Despite this, those that do so recommend it quite ardently to all their friends based on the ease, time savings, substantial reduction is costs, according to the comic—even more so than the pro-metric advocates.

Randall previously referenced this idea in the xkcd survey (see [[1572: xkcd Survey]]) from September 2015. It included this question:

<blockquote>
Have you ever thrown out all your different pairs of socks/underwear, bought a bunch of replacements that were all one kind, and then told all your friends how great it was and how they should do it too?
</blockquote>

;''People who open bananas from the other end''
The most evangelic people Randall can think of is the people who open {{w|bananas}} from the “other” end! Some people prefer to open bananas from the bottom (small end) instead of the top (stem end). This thought is continued in the title text.

;''Title text''
The title text is a fictional argument that apparently somehow tore apart Europe between the two factions ''Other primates open them from the small end'' and ''But the little bit of banana at the small end end is gross''. It continues the most evangelic point in the chart about how bananas are supposed to be opened from the “right” end. It seems absurd that this could have actually happened, over such a trivial issue. However, major {{w|schisms}} in religion, such as that between {{w|Catholicism}} and {{w|Protestantism}} (which did split Europe) seem similarly trivial to the non-religious.
The supposed argument ''stems''<nowiki>[</nowiki>[[No Pun Intended|Pun Intended]]<nowiki>]</nowiki> from a disagreement between those that find it easier to open a banana from the bottom and those that find the small bit at the base of a banana unappetizing.

In the wild, {{w|primates}} have been observed to open bananas{{Citation needed}} from the bottom end away from the stem, as one of the two factions refers to. Less force is required to open a banana at the bottom than at the stem, causing less bruising of the fruit and generally making it easier to open. However, if not done carefully, this can result in the fruit getting squished and making a mess on the person’s fingers. Opening bananas from the stem end appears to be the predominant habit of most banana-eating humans (in Randall’s sample). One explanation is that using the stem as a lever makes for greater ease of opening and thus less damage in practice. (Bananas grow with [https://en.wikipedia.org/wiki/File:Banana_farm_Chinawal.jpg the stem at the bottom]).

The entire “correct banana end” discussion could be a reference to the wars between the Blefuscudians, who opened their eggs at the big end, and the Lilliputians, who broke their eggs at the small end, as told in {{w|Jonathan Swift|Jonathan Swift’s}} epic novel ''{{w|Gulliver’s Travels}}''. This in turn is the origin of the terms {{w|Endianness|"Little Endian" and "Big Endian"}} which were much debated in circa 1980's computer architectures - which may also have been on Randall's mind.

Randall’s thoughts on the problems with opening bananas could also explain why this fruit, which many find very easy to peel and consume, is listed in the middle of the easy/difficult scale in the [[388: Fuck Grapefruit]] chart.

==Transcript==
:[A chart is shown with a line drawn from left to right with five markers on it. Each marker has a line going to it from a labeled below the main line. Above this there is a title and right below that a label above an arrow pointing to the right.]
:<big>People by intensity of evangelism</big>
:More intense

:Religious proselytizers
:People who want the US to switch to metric
:People who want the US to switch to metric but keep Fahrenheit
:People who threw away their socks and bought all one kind
:People who open bananas from the other end

{{comic discussion}}

[[Category:Charts]]
[[Category:Rankings]]
[[Category:Religion]]
[[Category:Food]]

1964: Spatial Orientation

2018-03-11T08:31:14Z

Pascal: /* Explanation */ fix Earth perihelion/aphelion

{{comic
| number = 1964
| date = March 7, 2018
| title = Spatial Orientation
| image = spatial_orientation.png
| titletext = Here, if you know the number of days until the vernal equinox, I can point you to the theater using my pocket Stonehenge.
}}

==Explanation==
{{incomplete|The table needs extending to include each thing Cueball lists. Also, if someone could clarify on the stonehenge... and link (more?) comics related to Cueball/Randall overthinking things. - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

Location in space is always relative, as we cannot observe empty space itself and find an absolute location. Planets are subject to different types of motion, including rotation, precession, and others.
{| class="wikitable"
!style="width:15%"|Frame of reference
!style="width:25%"|Comic explanation
!style="width:60%"|Scientific explanation
|-
|The Earth (rotation)
|Cueball starts by stating that as he is facing west, the Earth's spin will be carrying him backwards.
Except at the poles, everything on Earth's surface is being rotated to the east, "toward" the rising sun in the east or "away" from the setting sun in the west.

|On the equator, Earth's spin is about 464 meters per second (with 464m being 1/60 of 1/60 of 1/24 of Earth's equatorial circumference of 40070 km, based on the number of seconds in a day, ignoring the difference between sidereal and ephemeris days).
So, on the equator at sunrise, on the day of a March or September equinox, this spin, by itself, would take someone toward the sun at about 464 meters per second.

This spin would be slower than 464 m/s at 39 degrees North.
The average radius of the Earth is 6371 km.
This means that the distance from a line between the poles through the center of the Earth to a point on Earth's surface at 39 degrees north is approximately 6371km times the cosine of 39 degrees (.68 radians), which is 4951km.
So, the distance around the Earth along the 39 degrees latitude "line" is 2 times pi times 4951km, which is about 31,109 km. (This estimate ignores the oblateness of the Earth.)
So, the rotation of the Earth on its axis would transport points on Earth at 39 degrees latitude to the east at 360 meters per second (1/60 of 1/60 of 1/24 of 31,109).
Determining how the direction that is currently east for Cueball is oriented relative to the sun and the solar system depends on some of the issues Cueball identifies later.
|-
|The Earth (orbit)
|Cueball then seemingly corrects himself in his head, having accounted for the fact that the Earth is also revolving around the sun.

|The Earth's orbit around the sun is counter-clockwise, when viewed from above the North Pole looking down.
Earth's counter-clockwise orbit around the sun means that, for most latitudes, the direction the Earth is moving around the sun corresponds roughly to west at noon, and east in the middle of the night.
The Earth is spinning, so "east" from any given location on the surface is not always the same direction relative to the sun.

The speed of the Earth's orbit around the sun depends on the time of year.
The Earth moves faster around the sun when it is closest to the sun in early January, and slower when it is far away in early July (which may be counter-intuitive to those in the in the northern hemisphere).
However, Earth's average orbital speed is reportedly about 29.78 kilometers per second, with Earth's average distance from the sun being a bit less than 150 million kilometers.
Earth's orbit around the sun is nearly circular, with an eccentricity of just 0.0167.
|-
|Earth's tilted axis
|Cueball knows that the earth's axis is tilted (by 23 degrees) relative to its orbit around the sun and knows that he is 39 degrees north of the equator, but is unsure how to combine this information to figure out his orientation relative to the plane of the solar system.
|The Earth’s orbit around the sun, under Keplerian assumptions, is an ellipse, which lies within a plane. Furthermore, the entire solar system, to some extent, lies within a plane, since the orbital inclinations of Mars and the gas and ice giants are within two and a half degrees of Earth’s and the orbital inclinations of a major body in the solar system (such as a planet) rarely, if ever, varies from that of another by more than eight degrees. With the exception of Eris, all planets and dwarf planets have an orbital inclination within about thirty degrees of Earth’s.

Cueball is attempting to determine where the plane of the solar system lies with regard to him. Ignoring any possible difference between Earth’s orbit and this plane, and assuming that Cueball is standing on flat ground, the angle between the line from the center of the earth through Cueball (which runs through his body parallel to his legs and spine if he is standing straight up) and the plane of the solar system can be expressed in terms of two angles: the angle between the plane of Earth’s equator and the solar plane, and the angle between the Earth’s equatorial plane and the vertical line through Cueball. Cueball is at 39 degrees north, so if Cueball is standing straight up, the angle between the plane of the Earth’s equator and the long axis of his body is also 39 degrees. As stated in the comic, Earth’s axis is currently tilted by about 23.4 degrees (an amount which is very slowly decreasing as part of a 41,000 year cycle).

Cueball is trying to determine whether to add together 39 degrees and 23 degrees to get the angle between himself and the solar system’s plane or subtract them. The answer depends on the time of day and the time of year. On the day of the summer solstice in the northern hemisphere (around June 21), the north pole is tilted toward the sun, so at the longitude that is currently experiencing high noon / solar noon, the solar plane passes through a point that is 23 degrees north of the equator. So, if it is solar noon on the summer solstice, Cueball should subtract the angles to find that the direction his body is pointing is roughly 16 degrees away from the solar plane. If he were to somehow lean so that he could tilt his body 16 degrees to the south, the solar plane would pass through the vertical axis of his body and his scalp would be pointed directly toward the sun. On the other hand, on the day when the northern hemisphere is experiencing the winter solstice (around December 21), the northern hemisphere is pointing away from the sun, so at solar noon on that day, he would add the angles together to find that his vertical stance is 62 degrees away from the plane of the solar system. (The sun is never truly directly overhead at latitudes further from the equator than 23.4 degrees. At arctic latitudes that are less than 23.4 degrees from the north pole - more than 67 degrees north of the equator - the sun is not visible on the day of the winter solstice even when it is noon on the clock.)

If it is not a solstice day, or if it is not noon, the calculations could become more complicated. The comic was uploaded roughly two weeks before the northern hemisphere’s spring equinox. Cueball notices that the sun is “passing over his left shoulder” as he faces west. At temperate latitudes in the northern hemisphere, the sun would be to the left of a person facing west around midday almost any time of year, although how many degrees to the left depends on the calculations discussed above.
|-
|The Moon
|Cueball knows about the Moon's path across the sky and knows that its orbit around the Earth appears counter-clockwise when viewed from above the North Pole, but is confused about whether the Moon is moving toward the Sun or away from it.
| Like the Earth, the Moon, when viewed from above Earth’s North Pole, both orbits counter-clockwise and rotates on its axis counter-clockwise (with equal rotational periods such that the same side of the moon always faces us). (In fact, almost every body in the Solar System both orbits the body it is orbiting counter-clockwise and spins on its axis counter-clockwise, with the rotational axes of Venus and Uranus being major exceptions.)

A new moon happens when the moon is closer to the sun than the earth is, thus casting the near side of the moon in darkness because it is the far side of the moon that is facing the sun. Conversely, a full moon happens when the moon is on the other side of the Earth from the sun; this is why a lunar eclipse can only occur during a full moon. In that sense, it could be said that the moon is moving perpendicular to the line between it and the sun at the time of the full moon and the new moon, moving toward the sun after the full moon until the next new moon, and moving away from the sun after the new moon until the next full moon.

In another sense, since the moon is orbiting the Earth and the Earth’s orbit around the sun is elliptical, it could be said that the moon is getting closer to the sun whenever Earth is moving toward its perihelion, the point in its orbit that is closest to the sun, around January 3, and moving away as the Earth moves toward its aphelion, the point in its orbit that is furthest from the sun, around July 4. In yet another sense, since the Moon follows the path of the Earth, and the Earth’s orbit around the Sun is roughly circular, and the instantaneous motion of an object in a circular orbit is always perpendicular to the radius connecting it to the orbited body, it could be said that the moon is always moving perpendicular to the line connecting the Earth and Sun, which is at most a fraction of a degree away from the line connecting the Moon and the Sun.

The semi-major axis of the moon’s orbit around the Earth (the furthest distance between the Moon and the center of its orbit) is 384,400km. Compared to the semi-major axis of Earth’s orbit around the Sun, which is 149,600,000km, the axis of the Moon’s orbit is only 0.26% as large. The Moon’s orbital period is 27.3 days, but its synodic period (the time between full moons; the time it takes the moon to reappear at the same point in the sky) is 29.5 days.

[Needs an additional section explaining the path of the moon across the night sky]
|}

Cueball internally attempts to orient himself amidst the galactic chaos but is confused and has to restart.
It is then revealed to the reader, that some passersby were only trying to ask Cueball for directions to the theater, and he was just grossly overthinking it. (A recurring theme in xkcd. See: [[222: Small Talk|#222: Small Talk]], [[439: Thinking Ahead|#439: Thinking Ahead]], [[1643: Degrees|#1643: Degrees]]). One can imagine Cueball having his mind in astrophysics so much that he needs to calculate the angle of the road relative to the plane of the galaxy to determine which way a destination is in conversational terms.

In the title text, Cueball mentions he has a pocket Stonehenge. During the equinoxes the sun lines up with the actual Stonehenge's pillars. Assuming you were at the actual monument, armed with the date you could calculate the cardinal directions based on the sun's location relative to the pillars.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Cueball appears to be tilted on a flat surface.]

:Cueball (thinking): I'm facing West so the Earth's spin is carrying me backward. But our orbit is carrying me forward around the Sun.
::The Sun is passing over my left shoulder. I'm at 39ºN, so I'm tilted. But wait, Earth's axis is tilted by 23º. Do I add or subtract that to get the tilt of the Solar System?
::Ok, I see the Moon. It follows the Sun's path, but is it moving toward it or away? I know it orbits counterclockwise from the North...
::My head hurts. Let me start over.

:Off-screen voice #1: He's just standing there. Hey, do you know which way the theater is or not?
:Off-screen voice #2: Let's ask someone else.

:[Caption below:]
:I spend way too much time trying to work out my orientation relative to other stuff in the universe.

{{comic discussion}}

[[Category:Comics featuring Cueball]]

Talk:1855: Telephoto

2017-06-27T11:36:20Z

Pascal: Weight distribution

Notice the "webcam" placed on the front element, and the cable running through the extenders and converters back to the camera body? The extenders and converters are only being used for mechanical support, to place the webcam near the bird, and not optically. [[Special:Contributions/162.158.79.125|162.158.79.125]] 15:16, 26 June 2017 (UTC)
 
I understood it to be that the webcam was mounted on the side of the extender, allowing for a live stream in addition to the up close picture being taken. [[User:Rajakiit|Raj-a-Kiit]] ([[User talk:Rajakiit|talk]]) 16:25, 26 June 2017 (UTC)
:That's how I took it, but the webcam and wires are drawn in a lighter line, possibly insinuating that the webcam and wires are inside the extenders and converters. [[User:OldCorps|OldCorps]] ([[User talk:OldCorps|talk]]) 16:53, 26 June 2017 (UTC)

It depends on how tall Randall actually is, but using an average of 1.7 m for humans, that camera is about 32 feet, 4 inches long (it's about 5.8 times the length of Cueball). [[User:OldCorps|OldCorps]] ([[User talk:OldCorps|talk]]) 17:04, 26 June 2017 (UTC)
:Your comment makes me cringe. Apparently you measure people in metric but camera lengths (not focal length!) in imperial. So here you have it: 9,85m camera length! [[Special:Contributions/141.101.76.226|141.101.76.226]] 20:11, 26 June 2017 (UTC)
::Fair point, I'll simplify the equation. Cueball is 0.00845063 furlongs tall, the camera is 0.048984751 furlongs. [[User:OldCorps|OldCorps]] ([[User talk:OldCorps|talk]]) 11:33, 27 June 2017 (UTC)

;Incorrect definition of telephoto

A telephoto lens is actually a lens of which the physical length is shorter than the nominal focal length. For instance, I have a 90mm Leica lens that is about 67mm long; this is accomplished through the optical design. A ''long-focus'' or '' long '' lens is a lens with a comparatively long focal length: on 35mm cameras, this is generally any lens 85mm and up. They are sometimes called portrait lenses. A ''zoom'' lens is one with a variable focal length, e.g., 70mm – 140mm. It is not necessarily a long lens.

The distinction is especially important to large format photographers, and the conflation of the terms is common among lay speakers.

Randall has conflated a telephoto lens with a long lens, as does the current explanation.

See http://camera-wiki.org/wiki/Telephoto#Long-focus_.28Telephoto.29 for on the topic.
[[User:Seezee|Seezee]] ([[User talk:Seezee|talk]]) 18:21, 26 June 2017 (UTC)
:It would be nice if you could enhance the explanation by this matter. I'm not an expert on photography but I believe Randall is just talking about a ''telephoto'' which is often also called ''telephoto lens''. And his ''telephoto'' even doesn't need a single lens. Randall hasn't conflated anything, it's the explanation. I.e. instead of "100 foot lens" it should be "100 foot telephoto without lenses", and similar to other sentences.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 19:01, 26 June 2017 (UTC)

Could this also be a reference to all those phone camera attachment advertised online. I don't know if there's any truth to their claims (somehow I doubt it), but if anyone knows better, please chime in.

Were it not for the added weight of the tripod on the left, the right end would be on the ground. --[[User:Pascal|Pascal]] ([[User talk:Pascal|talk]]) 11:36, 27 June 2017 (UTC)

1831: Here to Help

2017-05-02T03:11:36Z

Pascal: /* Explanation */ fix & link quote

{{comic
| number = 1831
| date = May 1, 2017
| title = Here to Help
| image = here_to_help.png
| titletext = "We TOLD you it was hard." "Yeah, but now that I'VE tried, we KNOW it's hard."
}}

==Explanation==
{{incomplete|No details are included. Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic is a satire of computer programmers, who sometimes forget that not everything can be solved with an algorithm. In the first panel, [[Megan]] talks about how the field that she and [[Hairy]] works in has a difficult problem that many people have been working on. [[Cueball]], believing that algorithms can solve their problem, tries to help. In the next panel, Megan and Hairy silently watch Cueball working on the problem on his laptop. Finally, six months later, Cueball concedes, and an exasperated Megan retorts sarcastically, pointing out that she had explained its difficulty six months ago with the timeline.

The title text furthers Cueball's apparent arrogance by showing a dialogue. Megan or Hairy says, "We TOLD you it was hard," referring to the first panel, but Cueball, still confident in his own ability's superiority, says, "Yeah, but now that I'VE tried, we KNOW it's hard." The joke is that Cueball believes that, even though he has just failed, it was his attempt which proved the difficulty, and not Megan and Hairy's work for years.

The satire, however, applies far beyond computer programmers. It can be read as a political commentary. ([http://nymag.com/daily/intelligencer/2017/02/trump-nobody-knew-health-care-could-be-so-complicated.html "Nobody knew health care could be so complicated."]) It is what we'd all like to see when well-meaning advice givers provide the "simple" solution to all our problems, or management provides glib advice from ten thousand feet. It is a commentary on the universal tendency to see problems as simple because we don't know what makes them hard.

This comic may also be a subtle reference to [[793: Physicists]].

==Transcript==
{{incomplete transcript|Is this complete?}}
'''Megan:''' (speaking to Hairy) Our field has been struggling with this problem for years.

'''Cueball:''' Struggle no more! I'm here to solve it with ''algorithms!''

''[beat panel]''

'''Caption:''' Six months later: 
'''Cueball:''' Wow, this problem is really hard. 
'''Megan:''' ''You don't say.''

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]

Talk:1830: ISS Solar Transit 2

2017-04-29T01:14:06Z

Pascal: How often does an IIS Solar Transit happen?

Gees Randal, that's actually really dark.

Attempted explaining. It is not real, ... I hope {{[[Special:Contributions/108.162.229.250|108.162.229.250]] 05:03, 28 April 2017 (UTC)}}

costs would be astronomical. I see what you did there and I approve. [[Special:Contributions/162.158.92.118|162.158.92.118]] 07:23, 28 April 2017 (UTC)

:astronomical, good joke [[Special:Contributions/141.101.105.216|141.101.105.216]] 09:35, 28 April 2017 (UTC)
: +1 [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 11:28, 28 April 2017 (UTC)

:Yeah, I was amused by that too. But looks like someone removed it. [[Special:Contributions/162.158.154.109|162.158.154.109]] 17:06, 28 April 2017 (UTC)

Have to disagree on the Pink Floyd joke. I don't see it. [[User:Xseo|Xseo]] ([[User talk:Xseo|talk]]) 11:43, 28 April 2017 (UTC)

The diameter of the sun is 864,575.9 mi. In the first panel the ISS is about that far away. Second panel is about halfway, so 432,287.95 miles. According to [http://www.popsci.com/science/article/2010-07/how-close-could-person-get-sun-and-survive Popular Science], the ISS could probably make it to just over a million miles away before burning up (seeing as how the shuttle could make it ~1.3 million and I think the ISS has more protection), the "fwoosh" should be in the first panel. And in any matter, the sound effect should be a "sploosh" sound with the splashing visuals. [[User:OldCorps|OldCorps]] ([[User talk:OldCorps|talk]]) 13:22, 28 April 2017 (UTC)

If the impact were to really happen as shown, then one of two things must be true, either:
1) The ISS is really really large (eyeballing it as about 4x the size of the Earth vs. the size of the Sun as shown) or
2) The Sun is really smaller than we think and as close as the ISS's orbit.
In either case, the ISS would be likely to survive entry into the Sun's surface. If the former is true, this also makes replacing it twice a month all the more impressive. Go NASA!.[[User:Harodotus|Harodotus]] ([[User talk:Harodotus|talk]]) 16:48, 28 April 2017 (UTC)

:Obviously, the Sun is really smaller and as close as the ISS's orbit and it orbits Earth which is flat and in the center of Universe as Bible says. What else would you expect from the conspiracy theory? -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:12, 28 April 2017 (UTC)

Anyone want to try explaining limb darkening (as drawn in the comic)? [[Special:Contributions/198.41.238.40|198.41.238.40]] 18:28, 28 April 2017 (UTC)

Is there a reason Randall has done two IIS Solar Transit comics this week? Are these transits rare and one is happening around now or something? --[[User:Pascal|Pascal]] ([[User talk:Pascal|talk]]) 01:14, 29 April 2017 (UTC)

1825: 7 Eleven

2017-04-17T22:02:08Z

Pascal: /* Explanation */ The UTC standard allows leap seconds to be applied at the end of any UTC month

{{comic
| number = 1825
| date = April 17, 2017
| title = 7 Eleven
| image = 7_eleven.png
| titletext = Really, the only honest 24-hour stores are the ones in places like Arizona and Hawaii, and many of them are still wrong in certain years.
}}

==Explanation==
{{incomplete|Basic Explanation. Needs more. Solar day vs. sidereal day? Do NOT delete this tag too soon.}}
This comic pokes fun at the idiosyncrasies of time keeping. Since units of time are intimately tied to a planet's rotation, and planets rotate at different, inconsistent rates, time keeping doesn't always follow a simple pattern.

Many stores advertise being open 24/7, which means that they're open all day, every day. Many locations of the convenience store chain {{w|7-Eleven}} are now "open 24 hours", again meaning they are always open (despite historically being open only from 7 AM and 11 PM local time, hence its name).

The main joke in the comic refers to the fact that a {{w|Timekeeping_on_Mars#Time_of_day|day on Mars}} (the time it takes for Mars to make a full revolution on its own axis) is about 24 hours and 37 minutes of Earth time. If a 7-11 store is open for literally 24 Earth hours per Mars day, then it would actually be closed for around 37 minutes each day. Of course, this is only an issue if Earth and Mars time units are mixed. Had the sign implicitly referred to 24 Mars-hours (where one Mars-hour is defined as 1/24 of a Mars day), then the store would be open for the entire Mars day.

The duration for the Martian day used by [[Randall]] is the Martian {{w|sidereal day}} of 24 hours, 37 minutes, and 22.663 seconds. However, Mars exploration missions use the Martian {{w|solar day}} or {{w|Timekeeping_on_Mars#Sols|''sol''}} of 24 hours, 39 minutes, and 35.244 seconds. Thus in practice, the 7-11 store would be closed for 39 minutes daily instead of 37 minutes.

The first part of the title text refers to {{w|Daylight_saving_time|daylight saving time}} (DST), where days can be shortened or lengthened on predefined days of the year in order to maximize use of available sunlight. In the United States, most places set clocks forward by one hour on the second Sunday of March, resulting in a 23-hour day, and back again on the first Sunday of November, resulting in a 25-hour day. Thus technically, even a 7-11 in the US would not truly be open "24 hours" every day. Arizona and Hawaii are called out as exceptions because they do not observe daylight saving time (except on the Navajo reservation in Arizona). Randall has made fun of DST [[:Category:Daylight saving time|several times before]], and once again he shows his disdain for DST by saying only the two states not using DST are honest. This comic came out over a month after DST began in the US.

The second part of the title text refers to {{w|leap seconds}}, which are sometimes added to the end of a month in order to synchronize time with Earth's actual rotation. Months with a leap second will see its last day being one second longer than 24 hours. Since leap seconds apply to all Earth-based clocks, any store on Earth would not technically be open for exactly 24 hours on such days. Alternatively, a negative leap second would result in a day one second shorter than 24 hours. So far, all leap seconds have been positive, and given the slowing of the Earth's rotation it is unlikely that a negative leap second will ever occur. Leap seconds have been referred to before in the title text of [[1514: PermaCal]].

==Transcript==
:[A person in a spacesuit is trying in vain to open the door to a convenience store, rattling the handle. Behind him stands a tall post with a big 7-eleven logo at the top and the opening hours on a bar below the logo.]
:Sign: 7-Eleven
:Bar: Open 24 hours
:Door: ''Rattle rattle''

:[Caption below the panel:]
:I'm glad they finally opened a 7-Eleven here on Mars, but it's annoying how it closes for 37 minutes every day.

{{comic discussion}}

[[Category:Space]]
[[Category:Daylight saving time]]

1820: Security Advice

2017-04-06T04:48:57Z

Pascal: /* Security Tip Explanations */ typo fixes

{{comic
| number = 1820
| date = April 5, 2017
| title = Security Advice
| image = security_advice.png
| titletext = Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name.
}}

==Explanation==
{{incomplete|Incomplete. TBD:Complete tip explanations Do NOT delete this tag too soon.}}

The comic depicts a conversation between [[Cueball]] and [[Ponytail]], discussing the fact that giving people security advice in the past has failed to improve their internet security, and in some cases even made things worse. One such example is telling people to create complicated passwords containing numbers and symbols, which not only made the passwords harder to remember (leading people to create huge security risks by [https://arstechnica.com/security/2015/04/hacked-french-network-exposed-its-own-passwords-during-tv-interview/ leaving post-it notes with their passwords on their computer monitor]), but did not actually make those passwords harder to crack (see [[936: Password Strength]]).

As a result, Cueball suggests using {{w|reverse psychology}} and give out bad advice instead, in hopes of achieving a positive effect. The last panel contains a list these security tips, which are parodies of actual security tips.

===Security Tip Explanations===
{| class="wikitable"
!Security Tip
!Explanation
|-
|Print out this list and keep in in your bank safe deposit box (header)
|This is a standard recommendation for documents that must be kept secure because they are irreplaceable and/or contain sensitive information. However this list itself is easily replaceable and the contents will be well-known, so storing it in a safe place is totally unnecessary. Putting it in a safe deposit box would even be counterproductive since the list can only serve its purpose as a ready reminder if it's easily accessible to everyone.
|-
|Don't click links to websites
|The usual tip is "Don't click on ''suspicious'' website links" or "Don't click any links in suspicious emails". The comic's variation instead tells users not to click on any links to any websites, which essentially stops them from using the world wide web altogether.
|-
|Use prime numbers in your password
|It is usually recommended that one uses numbers in one's password, to increase its entropy, making it harder to {{w|Brute-force attack|brute force}}. In contrast the comic suggests using {{w|prime numbers}} in one's password. Large prime numbers are an essential part of modern cryptography and security systems, when used in algorithms that are computed by machines. They don't have any effect when used by humans in passwords, except for maybe making it harder to remember. In addition, if people were to regularly use prime numbers in their passwords, it would actually make passwords ''easier'' to guess, as it would substantially reduce the number of possible passwords people may choose from.
|-
|Change your password manager monthly
|It is often recommended to change passwords on a regular basis and to use a {{w|password manager}}. Password managers are programs which can help users create, store, and change their passwords easily and securely. Changing password managers monthly would involve copying all stored passwords from one manager to another, which would be quite impractical and has no security benefit.
|-
|Hold your breath while crossing the border
|At some border crossings, government agents may search computers, cell phones, and other electronic devices. The usual advice for such situations ranges from asserting your rights to resetting all devices and deleting all data prior to crossing a border. Holding one's breath can potentially prevent inhaling germs or poisons in some situations, though useless in the context of computer security. These two topics mixed in the same advice won't achieve anything, but if you hold your breath for too long you could pass out when crossing, or look stressed/suspicious and invite even more scrutiny. This could also be a reference to the superstition of holding one's breath when passing a graveyard.
|-
|Install a secure font
|A real tip might be "Install a secure browser" especially when many people used {{w|Internet Explorer 6}}. Using a different font on a computer would not help one's internet security. Reference to Turing-complete kerning specification language in OpenType fonts. May also refer to [https://www.proofpoint.com/us/threat-insight/post/EITest-Nabbing-Chrome-Users-Chrome-Font-Social-Engineering-Scheme Google Chrome "Install missing font" malware].
|-
|Use a 2-factor smoke detector
|{{w|Multi-factor authentication|Two factor authentication}} describes the practice of using two different identification factors (such as a password and a code from a secure token) to authenticate the user. A two factor smoke detector presumably uses two or more factors to identify ''smoke'' (such as {{w|Smoke_detector#Ionization|ionization}} and {{w|Smoke_detector#Photoelectric|photoelectric}}). Such devices [http://alarmspecs.com actually exist], but, while improving the users general safety, they do nothing to improve their internet security.
|-
|Change your maiden name regularly
|The usual tip is to change your passwords regularly. Some password recovery procedures ask for a security question, like "what is your maiden name" (which is the family name that you were born with). Sometimes, maiden name of a parent of yours (typically your mother as your father's maiden name is most often your name too) is asked instead of one of yours. Since it acts as a second password, it should also be changed regularly. Changing it, however, would be very difficult or even impossible, even more so on a regular basis. Also, maiden names and other trivia typically asked by security questions are not secret, so they are inherently not secure.
A real tip for dealing with security questions would be to enter false data.
|-
|Put strange USB drives in a bag of rice overnight
|The usual security tip is "Don't plug strange USB drives into your computer," because sometimes attackers put viruses that infect your system when plugged in. This tip states that you should "put USB drives in a bag of rice overnight" which is a common technique for drying out water damaged devices, due to rice's absorbent qualities. This would not clean the drive of viruses, and unless the drive was wet (perhaps because you found it outside due to it being called "strange") it would not do anything. In [[1598: Salvage]], another attempt is made to salvage something unconventional with rice.
|-
|Use special characters like & and %
|You can use special characters to increase the entropy/strength of your password, though as describe in [http://www.explainxkcd.com/wiki/index.php/936:_Password_Strength xkcd 936], that often leads to passwords that are hard to remember but not particularly strong. The password context is missing here, and in everyday situations the characters & and % are not special. These two characters are often disallowed in passwords because of their relevance to [https://en.m.wikipedia.org/wiki/SQL SQL] (a common database query language). If these characters were used in a password, a badly written security system using SQL could have severe bugs (and security vulnerabilities) similar to the security flaw in [[327: Exploits of a Mom]].
|-
|Only read content published through Tor.com
|[https://en.wikipedia.org/wiki/Tor_(anonymity_network) Tor] is a software solution to provide anonymity on the web for its users. The website [https://tor.com Tor.com] is the website of fantasy and sci-fi book publisher Tor, which has no relation to the Tor-network.
|-
|Use a burner's phone
|A play on using a burner phone (a cheap/disposable cell phone like those purchased at 7-11, often used for drug deals or other activity one might not want traced), and using the cell phone of a burner, i.e. a person who goes to the Burning Man festival.
|-
|Get an SSL certificate and store it in a safe place
|SSL/TLS is a protocol for securing connections on the internet. To check if someone is who he claims to be you can check the individual's certificate. Such a certificate has to be public, storing it in a safe place makes the certificate useless. You have to store the private key that matches the certificate in a safe place, else someone could steal the identity.
|-
|If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.
|This tip is a reference to Ingmar Bergman's film {{w|The Seventh Seal#Synopsis| The Seventh Seal}}, in which the protagonist challenges Death to a game of chess.
|-
|Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name. (Title Text)
|The usual security tip here is ''"only trust twitter accounts claiming to be legitimate if they have a blue check mark next to their name"'', which means that the account is verified as legitimate. This tip suggests only giving your ''password'' to verified accounts, although you shouldn't give your password to ''any'' account. It also refers to problems especially visible in the US banking system, where there is very little security for direct account drafts, and because of that it is advised there to keep the account number as secret as possible. In contrast, in Europe giving your account number to someone is one of the most common ways to get paid.

A related tip might be ""Never give your password or bank details to a website that doesn't have a padlock icon next to the URL"". In some browsers, if you access a secure website, there will be a padlock icon in the browser indicating you've connected to a secure website using the secure https protocol. So this tip treats the verified account icon the same way you might treat a secure website icon.
|}

==Transcript==

:Ponytail: We've been trying for decades to give people good security advice.
:Ponytail: But in retrospect, lots of the tips actually made things worse.

:Cueball: Maybe we should try to give ''bad'' advice?
:Ponytail: I guess it's worth a shot.

:Security tips
:(Print out this list and keep it in your bank safe deposit box.)
* Don't click links to websites
* Use prime numbers in your password
* Change your password manager monthly
* Hold your breath while crossing the border
* Install a secure font
* Use a 2-factor smoke detector
* Change your maiden name regularly
* Put strange USB drives in a bag of rice overnight
* Use special characters like & and %
* Only read content published through Tor.com
* Use a burner's phone
* Get an SSL certificate and store it in a safe place
* If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.

{{comic discussion}}

1820: Security Advice

2017-04-06T04:44:59Z

Pascal: /* Security Tip Explanations */ mother's maiden name

{{comic
| number = 1820
| date = April 5, 2017
| title = Security Advice
| image = security_advice.png
| titletext = Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name.
}}

==Explanation==
{{incomplete|Incomplete. TBD:Complete tip explanations Do NOT delete this tag too soon.}}

The comic depicts a conversation between [[Cueball]] and [[Ponytail]], discussing the fact that giving people security advice in the past has failed to improve their internet security, and in some cases even made things worse. One such example is telling people to create complicated passwords containing numbers and symbols, which not only made the passwords harder to remember (leading people to create huge security risks by [https://arstechnica.com/security/2015/04/hacked-french-network-exposed-its-own-passwords-during-tv-interview/ leaving post-it notes with their passwords on their computer monitor]), but did not actually make those passwords harder to crack (see [[936: Password Strength]]).

As a result, Cueball suggests using {{w|reverse psychology}} and give out bad advice instead, in hopes of achieving a positive effect. The last panel contains a list these security tips, which are parodies of actual security tips.

===Security Tip Explanations===
{| class="wikitable"
!Security Tip
!Explanation
|-
|Print out this list and keep in in your bank safe deposit box (header)
|This is a standard recommendation for documents that must be kept secure because they are irreplaceable and/or contain sensitive information. However this list itself is easily replaceable and the contents will be well-known, so storing it in a safe place is totally unnecessary. Putting it in a safe deposit box would even be counterproductive since the list can only serve its purpose as a ready reminder if it's easily accessible to everyone.
|-
|Don't click links to websites
|The usual tip is "Don't click on ''suspicious'' website links" or "Don't click any links in suspicious emails". The comic's variation instead tells users not to click on any links to any websites, which essentially stops them from using the world wide web altogether.
|-
|Use prime numbers in your password
|It is usually recommended that one uses numbers in one's password, to increase its entropy, making it harder to {{w|Brute-force attack|brute force}}. In contrast the comic suggests using {{w|prime numbers}} in one's password. Large prime numbers are an essential part of modern cryptography and security systems, when used in algorithms that are computed by machines. They don't have any effect when used by humans in passwords, except for maybe making it harder to remember. In addition, if people were to regularly use prime numbers in their passwords, it would actually make passwords ''easier'' to guess, as it would substantially reduce the number of possible passwords people may choose from.
|-
|Change your password manager monthly
|It is often recommended to change passwords on a regular basis and to use a {{w|password manager}}. Password managers are programs which can help users create, store, and change their passwords easily and securely. Changing password managers monthly would involve copying all stored passwords from one manager to another, which would be quite impractical and has no security benefit.
|-
|Hold your breath while crossing the border
|At some border crossings, government agents may search computers, cell phones, and other electronic devices. The usual advice for such situations ranges from asserting your rights to resetting all devices and deleting all data prior to crossing a border. Holding one's breath can potentially prevent inhaling germs or poisons in some situations, though useless in the context of computer security. These two topics mixed in the same advice won't achieve anything, but if you hold your breath for too long you could pass out when crossing, or look stressed/suspicious and invite even more scrutiny. This could also be a reference to the superstition of holding one's breath when passing a graveyard.
|-
|Install a secure font
|A real tip might be "Install a secure browser" especially when many people used {{w|Internet Explorer 6}}. Using a different font on a computer would not help one's internet security. Reference to Turing-complete kerning specification language in OpenType fonts. May also refer to [https://www.proofpoint.com/us/threat-insight/post/EITest-Nabbing-Chrome-Users-Chrome-Font-Social-Engineering-Scheme Google Chrome "Install missing font" malware].
|-
|Use a 2-factor smoke detector
|{{w|Multi-factor authentication|Two factor authentication}} describes the practice of using two different identification factors (such as a password and a code from a secure token) to authenticate the user. A two factor smoke detector presumably uses two or more factors to identify ''smoke'' (such as {{w|Smoke_detector#Ionization|ionization}} and {{w|Smoke_detector#Photoelectric|photoelectric}}). Such devices [http://alarmspecs.com actually exist], but, while improving the users general safety, they do nothing to improve their internet security.
|-
|Change your maiden name regularly
|The usual tip is to change your passwords regularly. Some password recovery procedures ask for a security question, like "what is your maiden name" (which is the family name that you were born with). Sometimes, maiden name of a parent of yours (typically your mother as your father's maiden name is most often your name too) is asked instead of one of yours. Since it acts as a second password, it should also be changed regularly. Changing it, however, would be very difficult or even impossible, even more so on a regular basis. Also, maiden names and other trivia typically asked by security questions are not secret, so they are inherently not secure.
A real tip for dealing with security questions would be to enter false data.
|-
|Put strange USB drives in a bag of rice overnight
|The usual security tip is "Don't plug strange USB drives into your computer," because sometimes attackers put viruses that infect your system when plugged in. This tip states that you should "put USB drives in a bag of rice overnight" which is a common technique for drying out water damaged devices, due to rice's absorbent qualities. This would not clean the drive of viruses, and unless the drive was wet (perhaps because you found it outside due to it being called "strange") it would not do anything. In [[1598: Salvage]], another attempt is made to salvage something unconventional with rice.
|-
|Use special characters like & and %
|You can use special characters to increase the entropy/strength of your password, though as describe in [http://www.explainxkcd.com/wiki/index.php/936:_Password_Strength xkcd 936], that often leads to passwords that are hard to remember but not particularly strong. The password context is missing here, and in everyday situations the characters & and % are not special. These two characters are often disallowed in passwords because of their relevance to [https://en.m.wikipedia.org/wiki/SQL SQL] (a common database query language). If these characters were used in a password, a badly written security system using SQL could have severe bugs (and security vulnerabilities) similar to the security flaw in [[327: Exploits of a Mom]].
|-
|Only read content published through Tor.com
|[https://en.wikipedia.org/wiki/Tor_(anonymity_network) Tor] is a software solution to provide anonymity on the web for its users. The website [https://tor.com Tor.com] is the website of fantasy and sci-fi book publisher Tor, which has no relation to the Tor-network.
|-
|Use a burner's phone
|A play on using a burner phone (a cheap/disposable cell phone like those purchased at 7-11, often used for drug deals or other activity one might not want traced), and using the cell phone of a burner, i.e. a person who goes to the the Burning Man festival.
|-
|Get an SSL certificate and store it in a safe place
|SSL/TLS is a protocol for securing connections on the internet. To check if someone is who he claims to be you can check the individuals certificate. Such a certificate has to be public, storing it in a safe place makes the certificate useless. You have to store the private key that matches the certificate in a safe place, else someone could steal the identity.
|-
|If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.
|This tip is a reference to Ingmar Bergman's film {{w|The Seventh Seal#Synopsis| The Seventh Seal}}, in which the protagonist challenges Death to a game of chess.
|-
|Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name. (Title Text)
|The usual security tip here is ''"only trust twitter accounts claiming to be legitimate if they have a blue check mark next to their name"'', which means that the account is verified as legitimate. This tip suggests only giving your ''password'' to verified accounts, although you shouldn't give your password to ''any'' account. It also refers to problems especially visible in the US banking system, where there is very little security for direct account drafts, and because of that it is advised there to keep the account number as secret as possible. In contrast, in Europe giving your account number to someone is one of the most common ways to get paid.

A related tip might be ""Never give your password or bank details to a website that doesn't have a padlock icon next to the URL"". In some browsers, if you access a secure website, there will be a padlock icon in the browser indicating you've connected to a secure website using the secure https protocol. So this tip treats the verified account icon the same way you might treat a secure website icon.
|}

==Transcript==

:Ponytail: We've been trying for decades to give people good security advice.
:Ponytail: But in retrospect, lots of the tips actually made things worse.

:Cueball: Maybe we should try to give ''bad'' advice?
:Ponytail: I guess it's worth a shot.

:Security tips
:(Print out this list and keep it in your bank safe deposit box.)
* Don't click links to websites
* Use prime numbers in your password
* Change your password manager monthly
* Hold your breath while crossing the border
* Install a secure font
* Use a 2-factor smoke detector
* Change your maiden name regularly
* Put strange USB drives in a bag of rice overnight
* Use special characters like & and %
* Only read content published through Tor.com
* Use a burner's phone
* Get an SSL certificate and store it in a safe place
* If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.

{{comic discussion}}

1820: Security Advice

2017-04-06T04:41:36Z

Pascal: /* Security Tip Explanations */ old link did not work

{{comic
| number = 1820
| date = April 5, 2017
| title = Security Advice
| image = security_advice.png
| titletext = Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name.
}}

==Explanation==
{{incomplete|Incomplete. TBD:Complete tip explanations Do NOT delete this tag too soon.}}

The comic depicts a conversation between [[Cueball]] and [[Ponytail]], discussing the fact that giving people security advice in the past has failed to improve their internet security, and in some cases even made things worse. One such example is telling people to create complicated passwords containing numbers and symbols, which not only made the passwords harder to remember (leading people to create huge security risks by [https://arstechnica.com/security/2015/04/hacked-french-network-exposed-its-own-passwords-during-tv-interview/ leaving post-it notes with their passwords on their computer monitor]), but did not actually make those passwords harder to crack (see [[936: Password Strength]]).

As a result, Cueball suggests using {{w|reverse psychology}} and give out bad advice instead, in hopes of achieving a positive effect. The last panel contains a list these security tips, which are parodies of actual security tips.

===Security Tip Explanations===
{| class="wikitable"
!Security Tip
!Explanation
|-
|Print out this list and keep in in your bank safe deposit box (header)
|This is a standard recommendation for documents that must be kept secure because they are irreplaceable and/or contain sensitive information. However this list itself is easily replaceable and the contents will be well-known, so storing it in a safe place is totally unnecessary. Putting it in a safe deposit box would even be counterproductive since the list can only serve its purpose as a ready reminder if it's easily accessible to everyone.
|-
|Don't click links to websites
|The usual tip is "Don't click on ''suspicious'' website links" or "Don't click any links in suspicious emails". The comic's variation instead tells users not to click on any links to any websites, which essentially stops them from using the world wide web altogether.
|-
|Use prime numbers in your password
|It is usually recommended that one uses numbers in one's password, to increase its entropy, making it harder to {{w|Brute-force attack|brute force}}. In contrast the comic suggests using {{w|prime numbers}} in one's password. Large prime numbers are an essential part of modern cryptography and security systems, when used in algorithms that are computed by machines. They don't have any effect when used by humans in passwords, except for maybe making it harder to remember. In addition, if people were to regularly use prime numbers in their passwords, it would actually make passwords ''easier'' to guess, as it would substantially reduce the number of possible passwords people may choose from.
|-
|Change your password manager monthly
|It is often recommended to change passwords on a regular basis and to use a {{w|password manager}}. Password managers are programs which can help users create, store, and change their passwords easily and securely. Changing password managers monthly would involve copying all stored passwords from one manager to another, which would be quite impractical and has no security benefit.
|-
|Hold your breath while crossing the border
|At some border crossings, government agents may search computers, cell phones, and other electronic devices. The usual advice for such situations ranges from asserting your rights to resetting all devices and deleting all data prior to crossing a border. Holding one's breath can potentially prevent inhaling germs or poisons in some situations, though useless in the context of computer security. These two topics mixed in the same advice won't achieve anything, but if you hold your breath for too long you could pass out when crossing, or look stressed/suspicious and invite even more scrutiny. This could also be a reference to the superstition of holding one's breath when passing a graveyard.
|-
|Install a secure font
|A real tip might be "Install a secure browser" especially when many people used {{w|Internet Explorer 6}}. Using a different font on a computer would not help one's internet security. Reference to Turing-complete kerning specification language in OpenType fonts. May also refer to [https://www.proofpoint.com/us/threat-insight/post/EITest-Nabbing-Chrome-Users-Chrome-Font-Social-Engineering-Scheme Google Chrome "Install missing font" malware].
|-
|Use a 2-factor smoke detector
|{{w|Multi-factor authentication|Two factor authentication}} describes the practice of using two different identification factors (such as a password and a code from a secure token) to authenticate the user. A two factor smoke detector presumably uses two or more factors to identify ''smoke'' (such as {{w|Smoke_detector#Ionization|ionization}} and {{w|Smoke_detector#Photoelectric|photoelectric}}). Such devices [http://alarmspecs.com actually exist], but, while improving the users general safety, they do nothing to improve their internet security.
|-
|Change your maiden name regularly
|The usual tip is to change your passwords regularly. Some password recovery procedures ask for a security question, like "what is your maiden name" (which is the family name that you were born with). Sometimes, maiden name of a parent of yours is asked instead of one of yours. Since it acts as a second password, it should also be changed regularly. Changing it, however, would be very difficult or even impossible, even more so on a regular basis. Also, maiden names and other trivia typically asked by security questions are not secret, so they are inherently not secure.
A real tip for dealing with security questions would be to enter false data.
|-
|Put strange USB drives in a bag of rice overnight
|The usual security tip is "Don't plug strange USB drives into your computer," because sometimes attackers put viruses that infect your system when plugged in. This tip states that you should "put USB drives in a bag of rice overnight" which is a common technique for drying out water damaged devices, due to rice's absorbent qualities. This would not clean the drive of viruses, and unless the drive was wet (perhaps because you found it outside due to it being called "strange") it would not do anything. In [[1598: Salvage]], another attempt is made to salvage something unconventional with rice.
|-
|Use special characters like & and %
|You can use special characters to increase the entropy/strength of your password, though as describe in [http://www.explainxkcd.com/wiki/index.php/936:_Password_Strength xkcd 936], that often leads to passwords that are hard to remember but not particularly strong. The password context is missing here, and in everyday situations the characters & and % are not special. These two characters are often disallowed in passwords because of their relevance to [https://en.m.wikipedia.org/wiki/SQL SQL] (a common database query language). If these characters were used in a password, a badly written security system using SQL could have severe bugs (and security vulnerabilities) similar to the security flaw in [[327: Exploits of a Mom]].
|-
|Only read content published through Tor.com
|[https://en.wikipedia.org/wiki/Tor_(anonymity_network) Tor] is a software solution to provide anonymity on the web for its users. The website [https://tor.com Tor.com] is the website of fantasy and sci-fi book publisher Tor, which has no relation to the Tor-network.
|-
|Use a burner's phone
|A play on using a burner phone (a cheap/disposable cell phone like those purchased at 7-11, often used for drug deals or other activity one might not want traced), and using the cell phone of a burner, i.e. a person who goes to the the Burning Man festival.
|-
|Get an SSL certificate and store it in a safe place
|SSL/TLS is a protocol for securing connections on the internet. To check if someone is who he claims to be you can check the individuals certificate. Such a certificate has to be public, storing it in a safe place makes the certificate useless. You have to store the private key that matches the certificate in a safe place, else someone could steal the identity.
|-
|If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.
|This tip is a reference to Ingmar Bergman's film {{w|The Seventh Seal#Synopsis| The Seventh Seal}}, in which the protagonist challenges Death to a game of chess.
|-
|Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name. (Title Text)
|The usual security tip here is ''"only trust twitter accounts claiming to be legitimate if they have a blue check mark next to their name"'', which means that the account is verified as legitimate. This tip suggests only giving your ''password'' to verified accounts, although you shouldn't give your password to ''any'' account. It also refers to problems especially visible in the US banking system, where there is very little security for direct account drafts, and because of that it is advised there to keep the account number as secret as possible. In contrast, in Europe giving your account number to someone is one of the most common ways to get paid.

A related tip might be ""Never give your password or bank details to a website that doesn't have a padlock icon next to the URL"". In some browsers, if you access a secure website, there will be a padlock icon in the browser indicating you've connected to a secure website using the secure https protocol. So this tip treats the verified account icon the same way you might treat a secure website icon.
|}

==Transcript==

:Ponytail: We've been trying for decades to give people good security advice.
:Ponytail: But in retrospect, lots of the tips actually made things worse.

:Cueball: Maybe we should try to give ''bad'' advice?
:Ponytail: I guess it's worth a shot.

:Security tips
:(Print out this list and keep it in your bank safe deposit box.)
* Don't click links to websites
* Use prime numbers in your password
* Change your password manager monthly
* Hold your breath while crossing the border
* Install a secure font
* Use a 2-factor smoke detector
* Change your maiden name regularly
* Put strange USB drives in a bag of rice overnight
* Use special characters like & and %
* Only read content published through Tor.com
* Use a burner's phone
* Get an SSL certificate and store it in a safe place
* If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.

{{comic discussion}}

1820: Security Advice

2017-04-06T04:38:07Z

Pascal: /* Transcript */ fix typo

{{comic
| number = 1820
| date = April 5, 2017
| title = Security Advice
| image = security_advice.png
| titletext = Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name.
}}

==Explanation==
{{incomplete|Incomplete. TBD:Complete tip explanations Do NOT delete this tag too soon.}}

The comic depicts a conversation between [[Cueball]] and [[Ponytail]], discussing the fact that giving people security advice in the past has failed to improve their internet security, and in some cases even made things worse. One such example is telling people to create complicated passwords containing numbers and symbols, which not only made the passwords harder to remember (leading people to create huge security risks by [https://arstechnica.com/security/2015/04/hacked-french-network-exposed-its-own-passwords-during-tv-interview/ leaving post-it notes with their passwords on their computer monitor]), but did not actually make those passwords harder to crack (see [[936: Password Strength]]).

As a result, Cueball suggests using {{w|reverse psychology}} and give out bad advice instead, in hopes of achieving a positive effect. The last panel contains a list these security tips, which are parodies of actual security tips.

===Security Tip Explanations===
{| class="wikitable"
!Security Tip
!Explanation
|-
|Print out this list and keep in in your bank safe deposit box (header)
|This is a standard recommendation for documents that must be kept secure because they are irreplaceable and/or contain sensitive information. However this list itself is easily replaceable and the contents will be well-known, so storing it in a safe place is totally unnecessary. Putting it in a safe deposit box would even be counterproductive since the list can only serve its purpose as a ready reminder if it's easily accessible to everyone.
|-
|Don't click links to websites
|The usual tip is "Don't click on ''suspicious'' website links" or "Don't click any links in suspicious emails". The comic's variation instead tells users not to click on any links to any websites, which essentially stops them from using the world wide web altogether.
|-
|Use prime numbers in your password
|It is usually recommended that one uses numbers in one's password, to increase its entropy, making it harder to {{w|Brute-force attack|brute force}}. In contrast the comic suggests using {{w|prime numbers}} in one's password. Large prime numbers are an essential part of modern cryptography and security systems, when used in algorithms that are computed by machines. They don't have any effect when used by humans in passwords, except for maybe making it harder to remember. In addition, if people were to regularly use prime numbers in their passwords, it would actually make passwords ''easier'' to guess, as it would substantially reduce the number of possible passwords people may choose from.
|-
|Change your password manager monthly
|It is often recommended to change passwords on a regular basis and to use a {{w|password manager}}. Password managers are programs which can help users create, store, and change their passwords easily and securely. Changing password managers monthly would involve copying all stored passwords from one manager to another, which would be quite impractical and has no security benefit.
|-
|Hold your breath while crossing the border
|At some border crossings, government agents may search computers, cell phones, and other electronic devices. The usual advice for such situations ranges from asserting your rights to resetting all devices and deleting all data prior to crossing a border. Holding one's breath can potentially prevent inhaling germs or poisons in some situations, though useless in the context of computer security. These two topics mixed in the same advice won't achieve anything, but if you hold your breath for too long you could pass out when crossing, or look stressed/suspicious and invite even more scrutiny. This could also be a reference to the superstition of holding one's breath when passing a graveyard.
|-
|Install a secure font
|A real tip might be "Install a secure browser" especially when many people used {{w|Internet Explorer 6}}. Using a different font on a computer would not help one's internet security. Reference to Turing-complete kerning specification language in OpenType fonts. May also refer to [https://www.proofpoint.com/us/threat-insight/post/EITest-Nabbing-Chrome-Users-Chrome-Font-Social-Engineering-Scheme Google Chrome "Install missing font" malware].
|-
|Use a 2-factor smoke detector
|{{w|Multi-factor authentication|Two factor authentication}} describes the practice of using two different identification factors (such as a password and a code from a secure token) to authenticate the user. A two factor smoke detector presumably uses two or more factors to identify ''smoke'' (such as {{w|Smoke_detector#Ionization|ionization}} and {{w|Smoke_detector#Photoelectric|photoelectric}}). Such devices [https://web.archive.org/web/20120416013553/http://www.systemsensor.com/lifesafety/2011/05/sophisticated-strategic-fire-and-life-safety-in-mission-critical-applications/| actually exist], but, while improving the users general safety, they do nothing to improve their internet security.
|-
|Change your maiden name regularly
|The usual tip is to change your passwords regularly. Some password recovery procedures ask for a security question, like "what is your maiden name" (which is the family name that you were born with). Sometimes, maiden name of a parent of yours is asked instead of one of yours. Since it acts as a second password, it should also be changed regularly. Changing it, however, would be very difficult or even impossible, even more so on a regular basis. Also, maiden names and other trivia typically asked by security questions are not secret, so they are inherently not secure.
A real tip for dealing with security questions would be to enter false data.
|-
|Put strange USB drives in a bag of rice overnight
|The usual security tip is "Don't plug strange USB drives into your computer," because sometimes attackers put viruses that infect your system when plugged in. This tip states that you should "put USB drives in a bag of rice overnight" which is a common technique for drying out water damaged devices, due to rice's absorbent qualities. This would not clean the drive of viruses, and unless the drive was wet (perhaps because you found it outside due to it being called "strange") it would not do anything. In [[1598: Salvage]], another attempt is made to salvage something unconventional with rice.
|-
|Use special characters like & and %
|You can use special characters to increase the entropy/strength of your password, though as describe in [http://www.explainxkcd.com/wiki/index.php/936:_Password_Strength xkcd 936], that often leads to passwords that are hard to remember but not particularly strong. The password context is missing here, and in everyday situations the characters & and % are not special. These two characters are often disallowed in passwords because of their relevance to [https://en.m.wikipedia.org/wiki/SQL SQL] (a common database query language). If these characters were used in a password, a badly written security system using SQL could have severe bugs (and security vulnerabilities) similar to the security flaw in [[327: Exploits of a Mom]].
|-
|Only read content published through Tor.com
|[https://en.wikipedia.org/wiki/Tor_(anonymity_network) Tor] is a software solution to provide anonymity on the web for its users. The website [https://tor.com Tor.com] is the website of fantasy and sci-fi book publisher Tor, which has no relation to the Tor-network.
|-
|Use a burner's phone
|A play on using a burner phone (a cheap/disposable cell phone like those purchased at 7-11, often used for drug deals or other activity one might not want traced), and using the cell phone of a burner, i.e. a person who goes to the the Burning Man festival.
|-
|Get an SSL certificate and store it in a safe place
|SSL/TLS is a protocol for securing connections on the internet. To check if someone is who he claims to be you can check the individuals certificate. Such a certificate has to be public, storing it in a safe place makes the certificate useless. You have to store the private key that matches the certificate in a safe place, else someone could steal the identity.
|-
|If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.
|This tip is a reference to Ingmar Bergman's film {{w|The Seventh Seal#Synopsis| The Seventh Seal}}.
|-
|Never give your password or bank account number to anyone who doesn't have a blue check mark next to their name. (Title Text)
|The usual security tip here is ''"only trust twitter accounts claiming to be legitimate if they have a blue check mark next to their name"'', which means that the account is verified as legitimate. This tip suggests only giving your ''password'' to verified accounts, although you shouldn't give your password to ''any'' account. It also refers to problems especially visible in the US banking system, where there is very little security for direct account drafts, and because of that it is advised there to keep the account number as secret as possible. In contrast, in Europe giving your account number to someone is one of the most common ways to get paid.

A related tip might be ""Never give your password or bank details to a website that doesn't have a padlock icon next to the URL"". In some browsers, if you access a secure website, there will be a padlock icon in the browser indicating you've connected to a secure website using the secure https protocol. So this tip treats the verified account icon the same way you might treat a secure website icon.
|}

==Transcript==

:Ponytail: We've been trying for decades to give people good security advice.
:Ponytail: But in retrospect, lots of the tips actually made things worse.

:Cueball: Maybe we should try to give ''bad'' advice?
:Ponytail: I guess it's worth a shot.

:Security tips
:(Print out this list and keep it in your bank safe deposit box.)
* Don't click links to websites
* Use prime numbers in your password
* Change your password manager monthly
* Hold your breath while crossing the border
* Install a secure font
* Use a 2-factor smoke detector
* Change your maiden name regularly
* Put strange USB drives in a bag of rice overnight
* Use special characters like & and %
* Only read content published through Tor.com
* Use a burner's phone
* Get an SSL certificate and store it in a safe place
* If a border guard asks to examine your laptop, you have a legal right to challenge them to a chess game for your soul.

{{comic discussion}}

1655: Doomsday Clock

2016-03-14T06:10:33Z

Pascal: /* Explanation */ remove urban legend - farmers opposed daylight saving time

{{comic
| number = 1655
| date = March 14, 2016
| title = Doomsday Clock
| image = doomsday_clock.png
| titletext = After a power outage at the Bulletin of the Atomic Scientists, the new Digital Doomsday Clock is flashing 00:00 and mushroom clouds keep appearing and then retracting once a second.
}}

==Explanation==
{{Incomplete|More detail on what is happening in the comic, and more history of the clock}}
The Bulletin of the Atomic Scientists is an academic journal which has a recurring feature known as the [https://en.wikipedia.org/wiki/Doomsday_Clock Doomsday Clock], which shows the Bulletin's judgment on the current state of the world. The idea is that when the clock hits midnight, the world ends (originally conceived as in a nuclear war), so how close the clock is to midnight is a scale of the world's current state of risk. Its current setting is at "three minutes to midnight" (11:57 PM or 23:57).

[https://en.wikipedia.org/w/index.php?title=Daylight_saving_time&redirect=no Daylight saving time] (DST) is a feature in many countries where in the summer months, everyone moves their clock forward an hour to artificially postpone sunset and thereby have a longer time of sunlight in the afternoon. The day before this comic came out, the United States switched from standard time to DST.

[[Cueball]] is inside the office of the Bulletin of the Atomic Scientists and comes across the Doomsday Clock, which is apparently an actual clock. Citing a [https://en.wikipedia.org/wiki/Mnemonic mnemonic], "Spring forward, fall back", referring to which direction to move the hour hand in the season when DST begins or ends, he pushes the hour hand forward one hour, so instead of the world being three minutes ''from'' the end of the world, it is now 57 minutes ''into'' it, so the final panel simply shows the world erupting in a [https://youtu.be/NFkryh6hC-k?t=23s ''Dr. Strangelove''-esque] nuclear apocalypse.

The title text continues on this same theme, with the clock (apparently replaced by a digital one) being reset by a power outage. Many digital clocks blink 00:00 once per second after a power outage, only stopping when the clock is reset. This is interpreted as the world actually blinking out of the Doomsday Clock's midnight, so a nuclear explosion would naturally appear and disappear in sync with the clock.

==Transcript==
{{incomplete transcript}}

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Time]]

1622: Henge

2015-12-28T09:32:24Z

Pascal: /* Explanation */ real estate

{{comic
| number = 1622
| date = December 28, 2015
| title = Henge
| image = henge.png
| titletext = I've got the Craigslist post ready to go! I wasn't sure what category it should go in, so I listed it as property and put that it has 'good sun exposure.'
}}

==Explanation==
[[Ponytail]] and [[Cueball]] are approaching two trees from the left to meet up with [[Megan]] who comes from the right. Ponytail tells Cueball that ''One day a year, the sun sets directly between these two trees.''

Cueballs reply, ''Oh, cool - like the Manhattan thing'', is a reference to {{W|Manhattanhenge}}, the phenomenon that causes the setting sun to align with the east-west streets of the main grid of {{w|Manhattan}}, {{W|New York}}, causing a very special light display. Manhattanhenge is itself named after {{W|Stonehenge}}, an ancient monument with several big stones, where the heel stone, and the embanked avenue, are aligned to the sunset of the {{W|winter solstice}} and the opposing sunrise of the {{W|summer solstice}} (thus creating on purpose the effect seen today in Manhattan). Hence the title of the comic.

Cueball goes on to point out that the setting sun would lineup with almost any two trees on any given day. This is due to the fact that any two trees that are close together and one is further north would allow a setting sun to set between them, as the viewer of the sunset would simply need to move themselves to make the alignment work.

The twist comes when Ponytail and Megan attempt to capture the sun with a net, as it is revealed that the sun is actually setting at the point between the two trees rather than behind the trees when viewed from the east side. This is of course not possible, but if the sun where to set between two trees (or rather the Earth fall into the sun) it would have burned up the Earth long before reaching the surface. If they did actually catch a "sun" in a net, it must be a really really small and cool one, since they can stand near it, and hold it in a {{w|butterfly net}}, and then plans to transfer it to a bag.

The two girls have thus planned to come here on this day, to capture the sun, so they can get rich as Ponytail exclaims. Since {{w|Earth}} (and the {{w|solar system}}) is now missing its {{w|Sun}}, there would be a ton of problems for everyone on Earth. So they should probably be able to get a lot of money in ransom... But in the title text it turns out that they are just going to sell the Sun online.

The title text refers to {{w|Craigslist}}; the website where the girls plans to sell the sun so they can get rich. It is a {{w|classified advertisements}} website with sections devoted to jobs, housing, personals, for sale, items wanted, etc. One of the girls tells that she was uncertain as to under which category she should list a "Sun for sale". But she put it under property (as in real estate). To advertise the "property" she put "''that it has 'good sun exposure''", a common description of real estate. Being the sun it self, and having lasted already 5 billions years under it's own intense radiation, you could phrase it like it has lasted well under sun exposure. On the other hand you could claim that it has never really been exposed to any external sun radiation, as the star light hitting the sun from other suns (stars) is very limited, even over 5 billion years.

==Transcript==
:[Megan and Ponytail are standing on either side of two trees with Cueball standing between the trees]
:Ponytail: One day a year, the sun sets directly between these two trees.
:Cueball: Oh, cool - like the Manhattan thing.

:[Cueball standing in blank frame]

:[Cueball, Ponytail and Megan standing next to each other with sun shining from the top of the frame]
:Cueball: Wait, isn't that true every day for pretty much any two trees?
:Megan: Shh, here it comes!

:[Ponytail is holding a butterfly net and Megan is holding a bag open]
:Cueball: Wait, what?
:Ponytail: OK, got the bag?
:Megan: Yup, grab it!
:Ponytail: We're gonna be rich!

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Megan]]
[[Category:Astronomy]]

1446: Landing

2014-11-12T06:09:44Z

Pascal: /* Frame by Frame Breakdown */ transcript

{{comic
| number = 1446
| date = November 12, 2014
| title = ???
| image = http://imgs.xkcd.com/comics/%3F%3F%3F.png
| titletext = ...
}}

==Explanation==
This comic seems to be changing over time like some past comics did. A Full explanation will likely have to wait till more panels are revealed.

It now says 3 hours to separation -- possibly about ESA landing probe on comet soon?

And now it's back to a blank frame.

12:50am: And now it says 'Has anyone ever tried this before?'.

'I don't think so.' A small black horizontal line, only a few pixels has appeared on the left.

Back to a wordless frame. The small black line has grown slightly. The black line has turned into the beginning of a shape, lengthening slightly with two small nubs on it.

Comic hits http://imgs.xkcd.com/comics/landing/ and also does requests to http://c4.xkcd.com/stream/comic/landing to get latest frame so it's definitely about the landing.

==Frame by Frame Breakdown==
{| class="wikitable plainlinks table-padding"
|-
!Image
!Day/Time
!Transcript
|-
|http://imgs.xkcd.com/comics/landing/r_00-05-00_KsvXIwq84J.png
|00:05:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-10-00_fUWUYNkxwp.png
|00:10:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-15-00_74eSd3x7BQ.png
|00:15:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-20-00_UT4FKycrmC.png
|00:20:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-25-00_FX6hlfSQHR.png
|00:25:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-30-00_FjnXADopvO.png
|00:30:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-35-00_lVC98SMY1X.png
|00:35:00
|Three hours to separation
|-
|http://imgs.xkcd.com/comics/landing/r_00-40-00_wmf0bPtxDN.png
|00:40:00
|-
|http://imgs.xkcd.com/comics/landing/r_00-45-00_MZprhbADHL.png
|00:45:00
|Has anyone ever tried this before?
|-
|http://imgs.xkcd.com/comics/landing/r_00-50-00_Z63bWhoaxd.png
|00:50:00
|I don't think so.
|-
|http://imgs.xkcd.com/comics/landing/r_00-55-00_2wCeCFN0R1.png
|00:55:00
|-
|http://imgs.xkcd.com/comics/landing/r_01-00-00_FRnIhqA5IZ.png
|01:00:00
|-
|http://imgs.xkcd.com/comics/landing/r_01-05-00_Os6SVGalch.png
|01:05:00
|}

==Transcript==

{{comic discussion}}
[[Category:Dynamic comics]]

Talk:1446: Landing

2014-11-12T05:58:04Z

Pascal: transcript

I would bet money that this comic will have to do with the Rosetta Lander that will be landing on a comet for the first time in history this morning. Info about it at Rosetta.esa.int

[[Special:Contributions/108.162.237.173|108.162.237.173]] 05:37, 12 November 2014 (UTC)pH

Almost definitely. The URL for the image (http://imgs.xkcd.com/comics/landing/r_00-40-00_wmf0bPtxDN.png) contains 'landing'.

[[User:DeedleFake|DeedleFake]] ([[User talk:DeedleFake|talk]]) 05:44, 12 November 2014 (UTC)

The image changes every five minutes. (http://imgs.xkcd.com/comics/landing/r_00-35-00_lVC98SMY1X.png) followed by (http://imgs.xkcd.com/comics/landing/r_00-40-00_wmf0bPtxDN.png) followed by (http://imgs.xkcd.com/comics/landing/r_00-45-00_MZprhbADHL.png) then (http://imgs.xkcd.com/comics/landing/r_00-50-00_Z63bWhoaxd.png), also I'm sorry about deleting other people's comments - firefox decided to not show the "other people have edited this" page :( [[User:Forkbomb|Forkbomb]] ([[User talk:Forkbomb|talk]]) 05:47, 12 November 2014 (UTC)

Forkbomb, you are not supposed to delete other's comments...
Yes. It is definitely about Rosetta. The image changed at 9.35 pm PST and it says "Three hours to separation", i.e. 12.35am PST, which is exactly the time at which PHILAE is going to separate...
[http://imgur.com/fK9Ddrx image_seen]
[http://blogs.esa.int/rosetta/2014/11/07/rosetta-and-philae-landing-timeline/ rosetta timeline]

[[Special:Contributions/199.27.128.237|199.27.128.237]] 05:50, 12 November 2014 (UTC)

Is anyone collecting URLs? I assume there's an easy automated way to do this that was used for Time. If not...

{| class="wikitable"
|-
! URLs
|-
| http://imgs.xkcd.com/comics/landing/r_00-30-00_FjnXADopvO.png
|-
| http://imgs.xkcd.com/comics/landing/r_00-35-00_lVC98SMY1X.png
|-
| http://imgs.xkcd.com/comics/landing/r_00-40-00_wmf0bPtxDN.png
|-
| http://imgs.xkcd.com/comics/landing/r_00-45-00_MZprhbADHL.png
|-
| http://imgs.xkcd.com/comics/landing/r_00-50-00_Z63bWhoaxd.png
|-
| http://imgs.xkcd.com/comics/landing/r_00-55-00_2wCeCFN0R1.png
|}

--[[Special:Contributions/108.162.219.244|108.162.219.244]] 05:56, 12 November 2014 (UTC)

(http://imgs.xkcd.com/comics/landing/r_00-45-00_MZprhbADHL.png) "Has anyone ever tried this before?" "No but fetishes have to start somewhere, right?" [[User:Nexxuz|Nexxuz]] ([[User talk:Nexxuz|talk]])

Probably just a mistake, but the transcript in the html source of 1446 is from 1445. --[[User:Pascal|Pascal]] ([[User talk:Pascal|talk]]) 05:58, 12 November 2014 (UTC)

1430: Proteins

2014-10-07T14:21:37Z

Pascal: fix residue link

{{comic
| number = 1430
| date = October 6, 2014
| title = Proteins
| image = proteins.png
| titletext = Check it out--when I tug the C-terminal tail, the binding tunnel squeezes!
}}

==Explanation==
In this comic, [[Cueball]] is asking [[Megan]] what she does, to which she replies that she works on software to predict protein folding. There are many folding prediction software programs. Some of the most well known are {{w|Folding@Home}}, {{w|Rosetta@Home}} and {{w|FoldIt}}.

{{w|Protein folding}} is the process by which proteins, which are floppy, unstructured chains of amino acids when initially synthesized in a cell, assume a stable, functional shape. If the folding process does not complete, or completes incorrectly, the resulting protein can be inactive or even toxic to the body. Misfolded proteins are responsible for several {{w|neurodegenerative}} diseases, including Alzheimer's disease, amyotrophic lateral sclerosis (ALS), and Parkinson's disease, as well as some non-neurodegenerative diseases such as cardiac amyloidosis.

Cueball asks Megan why it is such a hard computational problem, and Megan replies that it is like folding a live {{w|Crane (bird)|crane}}, not just a paper crane. The analogy is that a protein cannot just fold to a figurative representation of a bio-molecule (analogous to how a paper crane abstractly resembles the live crane). It must assume an exact, perfect fold in order to be functional.

{{w|Levinthal's paradox}} is a thought experiment, also constituting a self-reference in the theory of protein folding. In 1969, Cyrus Levinthal noted that, because of the very large number of degrees of freedom in an unfolded polypeptide chain, the molecule has an astronomical number of possible conformations. For example, a polypeptide of 100 {{w|Residue (chemistry)|residue}}s will have 99 peptide bonds, and therefore 198 different {{w|Dihedral angle|phi and psi bond angles}}. If each of these bond angles can be in one of three stable conformations, the protein may misfold into a maximum of 3^198 different conformations (including any possible folding redundancy). Therefore if a protein were to attain its correctly folded configuration by sequentially sampling all the possible conformations, it would require a time longer than the age of the universe to arrive at its correct native conformation. This is true even if conformations are sampled at rapid (nanosecond or picosecond) rates. The "paradox" is that most small proteins fold spontaneously on a millisecond or even microsecond time scale. This paradox is central to computational approaches to protein structure prediction.

Cueball asks whether he can make cuts during the folding process, as if this would then make folding a living crane somehow possible. This is probably a reference to proteins which begin as a single polypeptide chain before being cut into two chains by proteases (which may then join together again, by disulfide rather than by peptide bonds). [https://en.wikipedia.org/wiki/Insulin Insulin] is one such protein. Megan replies "if you can fold a Protease enzyme", an analogy to saying "if you can fold yourself some scissors". Protease enzymes are proteins whose job it is to break down (i.e. cut) other proteins, often in very specific ways. They are thus analogous to extremely specialized scissors. The meaning of this is that if, when trying to predict the folding trajectory in nature of protein A, one allows to make cuts - one is making the assumption that the Protease that cut protein A is already folded and functional. In other words, making cuts while folding just changes the question to how the protease doing the cutting was folded.

In origami, purists [http://www.barf.cc/jeremy/origami/BOOK/essays/origami_purism/origami_purism.htm] considered it as cheating if you cut the paper or use more than one sheet of paper, which is why Cueball asks if cuts are allowed.

The title text refers to the result of folding a paper crane in origami. Pulling the tail, the head will move forward and down. However, since the joke is about folding proteins, this idea is extrapolated to include the folded proteins. The C-terminus (end of the protein chain), in this case analogous of the tail, if "pulled" would cause a created cavity or tunnel to squeeze, much like pulling a knot would do the same.

{{w|Folding@Home}} (F@H) is a distributed computing project which aims to simulate protein folding for research purposes. Rather than the traditional model of using a supercomputer for computation, the project uses idle processing power of a network of personal computers in order to achieve massive computing power. Individuals can join the project by installing the F@H software, and are then able to track their contribution to the project. Individual members may join together as a team, with leaderboards measuring team and individual contributions.

Note that most modern computers do not "waste" computing time as much as older ones. They dynamically reduce their clock speed and other power consumption at times of low usage. If you donate computer time, you are probably also donating a bit of money to the cause in the form of your electricity bill. Many people consider this to be more fun, convenient and efficient than donating via credit card.

==Transcript==
:[Cueball is talking with Megan]
:Cueball: What do you do?
:Megan: I make software that predicts how proteins will fold.
:Cueball: Is that a hard problem?
:Megan: Someone may someday find a harder one.
:Cueball: Why is it so hard?
:Megan: Have you ever made a folded paper crane?
:Cueball: Yeah.
:Megan: Imagine figuring out the folds to make an actual living crane.
:Cueball: ...just folds? Can I make cuts?
:Megan: If you can fold a protease enzyme.

{{comic discussion}}
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]

explain xkcd:Community portal/Proposals

2014-06-28T17:33:20Z

Pascal: /* Not insulting new users */ new section

<noinclude>{{Community portal}}</noinclude>

== Add unexplained strips ==

At the moment, browsing through the explanations using the previous and next buttons is interrupted whenever there's an explanation missing.

I think adding a page with the strip fr all of those with a short message like "no one has explained this yet, want to give it a shot?" would make the wiki easier to browse through and will get more strips explained faster.

:I don't think that would happen. If suddenly it was much easier for people to skip over pages that had no explanation, I think they would do exactly that, skip right over it. On the same side of that coin, If suddenly there are no longer any red links on the [[List of all comics]] then everyone perusing that page assumes that all the comics have been explained and don't need to contribute any more. It's astonishing how quickly an [[589: Designated Drivers|embedded]] red link gets an explanation page created simply to get rid of the red link.

:Secondarily, ''many'' of the pages created recently aren't being created with their numerical and titular redirects. Without the numerical redirect, the comic template can't find that there is a previous/next comic to link to. Every once in a while somebody will go through and try to notice all the pages that don't have their redirects created but it's an unscientific process that only happens occasionally. If we could get every joe blow that comes in and vomits up a poorly done explanation to create the redirects I wouldn't be quite as annoyed at their lack of show-don't-tell-manship. But, since they can't be bothered to put the date in the comic template, I doubt we'll ever get people to create the redirects.

:'''TL;DR:''' No more red links, no more work gets done on the back catalog.

:--[[User:Lcarsos|lcarsos]]_a ([[User talk:Lcarsos|talk]]) 14:28, 21 December 2012 (UTC)

== xplainkcd.com ==

When I first saw this site I thought it should definitely be at xplainkcd.com or at least redirect from that url {{unsigned|115.166.22.158|12:45, 3 January 2013 (UTC)}}

: I like that idea! --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 13:28, 3 January 2013 (UTC)

:Yeah! If it's possible, it would be cool! At least as a redirect. -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 15:46, 3 January 2013 (UTC)

:Not technically the same thing, but I just took [http://expxkcd.com http://expxkcd.com]. More explanation is given on the website itself. {{User:Grep/signature|05:10, 29 March 2014}}
::We do that with explainxkcd.com as well, but yay shorter URLs! Mind if I use that for our social media links? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 06:45, 29 March 2014 (UTC)
:::I had no idea that you did that, but sure, go ahead! If you want, I can change any DNS records if you wish to have it go directly to you guys. {{User:Grep/signature|07:16, 29 March 2014}}
:::In case you were wondering, I just did the following: <code>^/([0-9]+)(/large)?/?$</code> {{User:Grep/signature|07:25, 29 March 2014}}
::::Hrm. We're just matching with <code>^(\d+)/?$</code>. You can keep ownership of the URL if you want, unless you have traffic concerns or whatever and you want us to handle it, which we're very capable of doing. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 08:47, 29 March 2014 (UTC)

== Section style and usage ==

I am new here and I'm trying to get up to speed with the culture. I have a few questions about how and where to use sections (== this ==). I am more willing to go with (and enforce) whatever norms there are here, but I have not seen them actually discussed.

# '''Is it OK to create sections in Discussion pages?''' I have been told no, but there are many examples extant of this usage in this Wiki and indeed in Wikipedia.
# '''Section title case''' [http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Capital_letters#Acronyms Wikipedia's style guide] recommends sentence case, not title case. There are many title cased section headers here.
# '''Links''' I do not have a reference for this but it seems to me putting links in section code (== [[<nowiki>this</nowiki>]] == ) is bad form.

Last note -- it's understood if these bylaws have not yet been written. I can see that a few of you have made a huge personal investment to make this Wiki what it is today, and that is a credit to you all -- this is awesome! As a long-time aficionado of xkcd I applaud your work and look forward to further collaboration.
--[[User:Smartin|Smartin]] ([[User talk:Smartin|talk]]) 04:15, 4 January 2013 (UTC)

:As a general rule, we stick to the standard format that existing pages follow, with an optional trivia section below the transcript. Some zealous editors like to add other sections though, which tend to be for the most part unneeded or redundant. If something you want to add doesn't help to explain the comic in some way, but the inclusion of which would somehow still add to the page, *and* it doesn't fall under the trivia category, a new section is warranted. This isn't the case most of the time though, so editors usually fold the content of extraneous sections into "Explanation" or "Trivia." We have no policy on links in titles, and they're allowed so long as they are appropriate; the link is useful and can't be folded into the section itself. And we use title case for titles cuz it just makes sense. '''[[User:Davidy22|Davidy22]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 05:08, 4 January 2013 (UTC)

:We generally do not (or at least, discourage) use sections on the talk/discussion pages for explanation pages. This is purely for looks. The comic discussion section of the explanation page looks/feels wrong if there are level 2 section breaks in the transclusion. Also, if the [http://www.mediawiki.org/wiki/Manual:Table_of_contents Table of Contents] starts showing up on a page, such as on [[Click and Drag]] the sections created on the talk page also show up in the TOC. This gets confusing, and this is why we prefer not to use them on explanation talk pages. Everywhere else we follow standard wiki format and do use sections on the discussion pages.

:Personally, I think that links in section titles looks wrong, but I choose not to be the dictator of style in this matter. :p

:Please feel free to make edits. The worst that happens is someone reverts your edit. If it's a big enough issue and/or you don't seem to be learning from what people are fixing about your edits someone will leave a comment on your talk page. That's it. We might leave a nasty-gram in the edit summary, but oh well. We only ban for malicious intent. Honestly working to better the wiki is good, even if sometimes we grumble about it.

:--[[User:Lcarsos|lcarsos]]_a ([[User talk:Lcarsos|talk]]) 07:00, 4 January 2013 (UTC)

::Oh, I just looked at your talk page. I completely forgot that that happened. Don't worry about it. Learning the ropes is part of the experience. Do make edits, and if they're wrong, we'll nudge you in the right direction. [[User:Lcarsos|lcarsos]]_a ([[User talk:Lcarsos|talk]]) 07:18, 4 January 2013 (UTC)

I have been moving some trivia sections to directly below the explanation, in order to make it more consistent, and easier to survey and maintain. Often the dividing line between trivia and explanation is not entirely clear, and in articles without a trivia section the end of the explanation very often contains trivia-like information. (e.g. [[1155: Kolmogorov Directions]]) -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 10:13, 4 January 2013 (UTC)
===Title case doesn't make any sense===
At first sight title case in titles just makes sense. However title case '''never''' makes sense. It's worse than all caps. Besides, only Americans and children like title case. [[Special:Contributions/190.96.48.48|190.96.48.48]] 20:04, 10 August 2013 (UTC)

== Protip ==

Anyone for adding ''Protip'' as a [[:Category:Comic series|Comic series]]. I have found five so far: [[653]], [[711]], [[1022]], [[1047]] and [[1156]]. (There are also a few comics with a protip title text.) -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 10:25, 4 January 2013 (UTC)

:I think that qualifies as a recurring topic (thus worthy of a category), but not as a series, where you can see a clear sequence. In fact, [[:Category:My Hobby|My Hobby]] has the same limitation, for what I suggest it to be removed from [[:Category:Comic series]]. --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 11:42, 4 January 2013 (UTC)

::Seconded. Looks general and common enough to be a category. '''[[User:Davidy22|Davidy22]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 14:57, 4 January 2013 (UTC)

:::Okay, great! Do you think that the ones with a "protip:" title text should be included? Besides, I think I might be the one responsiple for moving My Hobby from [[:Category:Comics by topic|Comics by topic]] to Comic series. I felt that all the My Hobby comics were about different topics, but maybe i've got to narrow an interpretation of the word "topic". -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 15:31, 4 January 2013 (UTC)

:::: Can you link to the protip-in-title-text comics?
:::: As for My Hobby, note that categories aren't mutually exclusive. They can be in the "my hobby" topic, and each of them further categorized as appropriate: music, math, etc. Makes sense? --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 03:45, 5 January 2013 (UTC)
:::: I just searched for protip in the xkcd search bar. Here: [[1084]], [[427]]. And yes, makes sense. I've moved My Hobby back to "by topic". -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 12:06, 5 January 2013 (UTC)

== Category: Sports ==

How about creating a new "Sports" category? [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 15:31, 28 January 2013 (UTC)
:Well, maybe. Everyone aren't so keen on new categories here. Which comics are you thinking of, for a start? –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 20:32, 28 January 2013 (UTC)
::We definitely need to reach an agreement as a community on when to create new categories. Something simple like a minimum of 3 (or, say, 5) existing comics. Since we're already at the proposals' portal... what do you guys think about that? --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 21:44, 28 January 2013 (UTC)
:::My opinion: Five would be enough to qualify. [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 09:31, 29 January 2013 (UTC)
::::I vote for four. But it should also be a reasonable thing to categorize, like sports, not like "sports with Cueball containing at least three anagram words". Wich sholdn't be a problem. :) But the best name choice could be tricky sometimes. e.g. "Film & television", Film & TV", "Film", "Films", or "Movies"? –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 12:59, 29 January 2013 (UTC)
:::
::::Agreed, five should be enough to create the category without having to discuss it. - [[User:Cos|Cos]] ([[User talk:Cos|talk]]) 00:50, 26 February 2013 (UTC)
: OK, let's start with [[588: Pep Rally|588]], [[1092: Michael Phelps|1092]], [[904: Sports|904]] and [[1107: Sports Cheat Sheet|1107]]. Should be able to find a few more. [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 05:00, 29 January 2013 (UTC)
::Yeah, it's a broad subject so there are probably several more. -[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 12:59, 29 January 2013 (UTC)
:::I found another one, sort of, in [[929:Speculation|929]] (although it hasn't been explained yet). Should I get the ball rolling (no pun intended) on setting up the category? Don't wanna do it unilaterally and get yelled at. ;) [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 06:18, 30 January 2013 (UTC)
::::I think you should. On a wiki, getting stuck in discussions which die without a conclusion, to the point that motivated people give up without having done anything, is definitely counter-productive, and phrases like [[wikipedia:Wikipedia:Be bold|Wikipedia:Be bold]] are here to remind us of that. Seems like people agreed that you ''could'', and after a while nobody said that you ''shouldn't'', so I'd say do it. - [[User:Cos|Cos]] ([[User talk:Cos|talk]]) 00:50, 26 February 2013 (UTC)

== Category: Sex ==

I think we should also create a Sex category. There's no ''doubt'' we can find more than three examples. I'll start looking for them and post the ones I find in here; again, I don't wanna create a large category by myself without community consent. [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 09:20, 2 February 2013 (UTC)
*OK, the ones for Category: Sex that I've found so far are [[443]], [[219]], [[550]], [[1026]], [[575]], [[468]], [[592]], [[320]], [[1101]], [[417]], [[713]], [[672]], [[230]], [[436]], [[940]], [[532]], [[649]], [[176]], [[1006]], [[596]] and [[717]], and I'm sure there are many more. Should we create this category? [[User:Ekedolphin|Ekedolphin]] ([[User talk:Ekedolphin|talk]]) 23:17, 3 February 2013 (UTC)

:Same as [[#Category: Sports|above]], do it. Oh, already did; well, all the better. - [[User:Cos|Cos]] ([[User talk:Cos|talk]]) 00:53, 26 February 2013 (UTC)

==New character==
As per [[Talk:1178: Pickup Artists]], the character with hair has appeared in quite a few comics now, and he's starting to become a recurring character. Shall we go ahead with inaugurating him into our list of regular characters, and what name shall we assign him? Current candidate names include Hairy and Harry. Anyone? '''[[User:Davidy22|Davidy²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 00:07, 26 February 2013 (UTC)

: I like Harry :) --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 01:04, 26 February 2013 (UTC)
::Cos made a point in the discussion on [[Talk:1178: Pickup Artists]] that Hairy is directly descriptive, whereas Harry is not obvious to visitors. On the other hand, not all names are descriptive ([[Danish]]) and I think this wiki is entitled to create some xkcd-in-culture, and not just describe. And Harry is quite funny.
::I wonder: has [[Randall]] ever called him anything at all in the transcript? –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 21:52, 26 February 2013 (UTC)
:::Well, he's not named in a any official transcripts, but he's already called Harry in quite a few comic explanations. Then again, I do like having a more descriptive name for him. Shall we hold this up to a vote? '''[[User:Davidy22|Davidy²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 23:29, 26 February 2013 (UTC)
::::I think we should wait a little for a few more viewpoints to crop up. Also, can someone link to some more comics he's been featured in? I've got [[1028: Communication]], [[1027: Pickup Artist]] and [[1178: Pickup Artists]]. –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 23:41, 27 February 2013 (UTC)
:::::I actually like what that anon said: ''Curly''. Second choice: Hairy (being descriptive, a la Black Hat, Beret, Cueball, etc.) While there's talk about in-culture, we've done that with the names Cueball, Beret, etc. It's my opinion that the only names that should be "real" proper names are those that are named in the comic. Megan, Miss Lenhart, etc. Danish (as is discussed below) isn't truly a proper name, but you could argue it's a meta-description (one attributed by Black hat.) So that's my vote: yes for '''Curly''' or '''Hairy''', no for Harry. [[User:IronyChef|IronyChef]] ([[User talk:IronyChef|talk]]) 05:21, 2 March 2013 (UTC)
:::That's right, [[Danish]] is not descriptive, but 1/ that name was suggested because the character [[515: No One Must Know|was called that way in the comic]], which is a tiny bit like a name given by the author (at least more than Harry which we have completely made up), and 2/ in that case it's hard to find a descriptive term: use something that revolves around her black hair (her only descriptive feature), and you easily mix up with [[Megan]]; the only graphical difference is that her hair is ''long'', but what kind of name can you make out of that?
:::For this new character, I suggest Hairy because it comes as the easy solution with every advantage: descriptive, easy to understand, and it's not ugly... I actually see no reason to resort to a made-up name like Harry.
:::[[User:Cos|Cos]] ([[User talk:Cos|talk]]) 22:29, 27 February 2013 (UTC)

: '''Alright. So the discussion's been had, and the most oft recommended name appears to be Hairy. All in favor, say aye. If more than 1/3 of editors agree and we have more than 6 votes, Hairy it is.''' '''[[User:Davidy22|Davidy²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 05:58, 2 March 2013 (UTC)
:# '''Aye''' '''[[User:Davidy22|Davidy²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 05:58, 2 March 2013 (UTC)
:# '''Aye''' [[User:Guru-45|Guru-45]] ([[User talk:Guru-45|talk]]) 06:14, 2 March 2013 (UTC)
:# '''Aye''' to Hairy. [[User:IronyChef|IronyChef]] ([[User talk:IronyChef|talk]]) 15:43, 2 March 2013 (UTC)
:# '''Aye'''. Harry would be a nice nod to the fact that he's actually hairy, but indeed it's better to avoid inside jokes. --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 17:05, 2 March 2013 (UTC)
:# '''Aye'''. I'm convinced! –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 17:52, 3 March 2013 (UTC)
:# '''Aye'''. Hairy. [[User:Lcarsos|lcarsos]]_a ([[User talk:Lcarsos|talk]]) 20:52, 3 March 2013 (UTC)
::Hooray! We now have a [[:Category:Comics featuring Hairy]], with four pages already! Does anyone feel compelled to create "[[Hairy]]", with a brief description and a nice profile pic like the other characters? –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 22:58, 3 March 2013 (UTC)

== Ambiguous characters ==

I've been thinking about the problem of the ambiguity of characters. "Is this really Cueball even though he has an eye and half a nose?", "This is very likely ''not'' x." "Darnit, these arn't Cueballs, these are Randall and his friends!", and so on. The character ambiguity is standard for xkcd (not less so in the early ones), and comes from the very loose or "free" way Randall uses his characters to be whatever he needs at the moment. It's simply often impossible for us to know whether he had e.g. "Cueball" or himself in mind, when drawing a particular comic (and I'd say: probably often both).

I want to suggest that we in general have a likewise rather loose policy towards including characters in the categories for the comics. So that reasonably ambiguous cases should be included in e.g. (does she have a ponytail?) This is not because I believe this or that to really be this or that; I just don't believe in objective truth (here!). I feel that when doing research :) on a character, the borderline cases are often the most interesting ones, and you want to be able to find them through the "Comics featuring miss x"!

I came to think this through now, when I wanted to (and did) list two comics with [[Miss Lenhart]] (?) where she was drawn but not named. Any thoughts on this in general? Other case studies? –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 21:17, 5 March 2013 (UTC)
:My take has always been that [[Cueball]], for example, has not been a specific character. There is not ''a'' cueball, per se, distinct from any other cueball... indeed, there are several comics with several cueballs in-frame, and that is the point. I see the cueball character as a wildcard character (pun intended) ready to stand in for anybody (and ''not'' necessarily just Randall; I think those readers who suggest "this ''is'' Randall" are missing the point; he's way more META than that...) [[Megan]], while slightly less generic, still remains the female wild-card significant-other, while Curls seems to be a not-significant-other female used to illustrate a relationship that is transient. Other characters come and go, and when it's important to visually distinguish them from others in the frame, they're given additional characteristics, to wit [[Hairy]], [[Ponytail]], etc.
:Unfortunately, that viewpoint is not commonly held, so I daresay I'm in the minority here.
:-- [[User:IronyChef|IronyChef]] ([[User talk:IronyChef|talk]]) 14:18, 6 March 2013 (UTC)

== Note at the top, about the server error ==

:''This thread was moved to [[MediaWiki talk:Sitenotice]]''

== Category: Flowcharts ==

Hello, the line "Randall has made use of flowcharts before." in today's comic explanation made me want a [[:Category:Flowcharts|flowcharts category]] to navigate into...

As it didn't exist, I proceeded to create it, but as the log says, [[User:lcarsos|lcarsos]] deleted such a category in November, saying ''"Insufficient differentiation from Category:Comics with charts, diluting the depth of comics tagged charts"''.

I don't agree with that, and I think we could profit from such a subcategory. I found those pages fitting it:
* [[94: Profile Creation Flowchart]]
* [[210: 90's Flowchart]]
* [[488: Steal This Comic]]
* [[627: Tech Support Cheat Sheet]]
* [[844: Good Code]]
* [[851: Na]]
* [[854: Learning to Cook]]
* [[1195: Flowchart]]

So? - [[User:Cos|Cos]] ([[User talk:Cos|talk]]) 10:59, 5 April 2013 (UTC)
:Weell if you're willing to take charge of the category and personally make sure it's added to all relevant comic explanations, go ahead. The usual objection to making new categories is that we admins can't remember all the categories when we're reviewing new explanations, but it's K if you're willing to take up that responsibility yourself. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 11:17, 5 April 2013 (UTC)
:
:: OK. I did it without waiting for further replies, because I think it will be especially profitable today (to viewers).
:: It doesn't seem a big issue to me if the correct category is not added when a new explanation is made: a passing editor will do it later on... But hey, I'm OK with taking special care of adding pages to this category.
:: [[User:Cos|Cos]] ([[User talk:Cos|talk]]) 12:28, 5 April 2013 (UTC)

::: I just want to add that Cos' view is indeed the appropriate way to work in wikis: there is no concept of a single author for a page, category, or piece of text, and the workload is meant to be distributed among several editors: it is not necessary that any single editor remembers all existing categories, or knows the wiki markup by heart, or knows how to work with all the features of mediawiki, etc. The reason why wikis can be edited by anyone is precisely a recognition that there *will* be errors and any page can be improved somehow. That reasoning against categories should, IMO, be abandoned, or at most only kept as the opinion of some editors. --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 22:00, 6 April 2013 (UTC)

Isnt there a page which lists all the categories? If not, there should be one, and it should be accessible to all. Such a page could be useful when trying to quick-add categories to comics. [[Special:Contributions/117.194.83.155|117.194.83.155]] 13:43, 24 April 2013 (UTC)
:Yes, there is. [[Special:Categories]]. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 14:07, 24 April 2013 (UTC)
::Of course, there's a gazillion of 'em, over several pages, so I understand any reluctance to add new categories (having just suggested a new one myself which I feel is justified, but knowing that the upkeep needed may be the key point of contention so remaining philosophical about it).
::A solution perhaps to carry over from another locale that I frequent is to have a "Categories of Character" page, a "Categories of Object" one, perhaps "Categories of Event", and a "Categories of Publication". For each new comic someone can easily check the shorter Character categories list against those present, the Object list against itemsin use, Events, etc, and of course the Publication one has the "Tuesday Comic"/equivalent, and other date-based ones (although isn't that automatic from templated creation? ...never added a comic, but would imagine it is). After that it's a trawl through the miscelania categories (perhaps a meta-category just for them?). But, yeah, a lot of work to set up. Wouldn't wish it on anyone who wasn't already willing to do it, and I remain an anon-IP person right now so can hardly commit ''myself'' as volunteer maintainer of this. [[Special:Contributions/178.98.31.27|178.98.31.27]] 17:20, 22 June 2013 (UTC)

== I've removed "add a comment!" from Discussion heading ==

This does move it to above the line, and the rule stops early. Undo my change if that's more bothering than when the TOC is displayed as "add a comment!Discussion"...

I don't know how to automatically treat level 2 headers as level 3. That may be why Discussion was a level 1 heading earlier.
[[User:Markhurd|Mark Hurd]] ([[User talk:Markhurd|talk]]) 11:16, 14 April 2013 (UTC)
:Actually I now noticed there was a short edit war at {{tl|comic discussion}} over whether it should be a level 1 heading, just for this reason. [[User:Waldir]] seems to have conceeded... [[User:Markhurd|Mark Hurd]] ([[User talk:Markhurd|talk]]) 11:25, 14 April 2013 (UTC)

:: No edit war, hence no (intentional) concession. I reverted a change once, and didn't notice the change being re-implemented by another user. In any case, it is irrelevant now since we actively discourage using headers in talk pages precisely so that they don't display in the TOC for the main comic page, where the discussion page is transcluded to (see the discussion [[#Section style and usage|above]]). This might not scale well for comics that generate lots of discussion. It might be worth discussing our customs (and perhaps write them down somewhere) before performing such changes. What do others think? --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 11:49, 14 April 2013 (UTC)

== Time: The Table ==

Right now on the page [[1190: Time]], we have a whole bunch of tables in the form image-time-hash. The tables take up heaps of vertical space and all have to be collapsed to even be remotely traversible. I propose that we aggregate all the images into one table after Time ends, like so:

{| class="wikitable plainlinks table-padding"
|-
!Image
!Time
!Image
!Time
!Image
!Time
!Image
!Time
|-
|[[Media:time.png|00:00]]||01/00:00||[[Media:time.png|10:00]]||01/10:00||[[Media:time.png|20:00]]||01/20:00||[[Media:time.png|30:00]]||AND MOAR SAMPLE DATAS
|-
|[[Media:time.png|00:30]]||01/00:30||[[Media:time.png|10:30]]||01/10:30||[[Media:time.png|20:30]]||01/20:30||[[Media:time.png|30:30]]||AND MOAR SAMPLE DATAS
|}

The hash values aren't really a part of the comic, they're gibberish for the most part and they take up space that could be used to compact the table, as shown above. Even if we are conservative and make the table only five columns wide to account for smaller screens, we've divided scrolling time by five and eliminated much of the need for annoying collapsed tables and section headers for each day. Constructing the table shouldn't be particularly hard either, as all our current data is in nice regular tables with clear patterns that are easy enough to parse through.

I'm putting this here because the organization of the frame entries would be unintuitive and difficult to change from the edit window, which would make it a poor choice when we're still expanding it and don't even know how long the comic will continue for. It's merely a space-saving trick for after we're sure that the comic is over. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 09:26, 16 April 2013 (UTC)

:Oh and it'd be really nice if other people could also upload images if you're awake and a new one rolls by. There's gaps in the image record every time I wake up, and I dun likey. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 11:34, 20 April 2013 (UTC)
:Good work so far; go ahead make it better! :) –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 08:34, 24 April 2013 (UTC)

==Featured Explanation, and Archival?==

* Wikipedia has featured content. Now that we are close to reaching the goal of all comics explained, I think it makes more sense to have a "featured explanation" which would serve as a sort of a marker for a complete and good explanation. Many comics, and almost all charts are not fully explained/not a good quality explanation.

* We should set up archival of discussion of the most discussed pages, like this one. Its not very pleasing to see comments from July 2012 still lying around here. It becomes hectic at some point.

Just my 2 cents, feel free to discuss. Cheers,
[[Special:Contributions/117.194.88.180|117.194.88.180]] 13:36, 24 April 2013 (UTC)

:We dedicate this wiki to explaining xkcd, and we do actually have a featured comic feature; it changes every week on Monday, Wednesday and Friday, and we usually manage to fill out the explanation for it within an hour or so of it going up. The most recent comic tends to be the one that most people visiting the wiki care about, so we give it prime space on the front page so they can find it easily. xkcd updates frequently enough that there isn't really that big of a time window for us to feature an article on our front page. Also, we're a volunteer project with quite a bit less manpower than Wikipedia.
:We do need to archive talk pages though. Some of these are getting ridiculously long. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 14:04, 24 April 2013 (UTC)
::I agree with Davidy22. Archiving topics can be done by anyone, by moving resolved threads to the portal section's corresponding [[explain xkcd talk:Community portal/Proposals|talk page]]. We could start with the threads marked "✓ Closed". [[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 17:42, 1 May 2013 (UTC)

:: The reason I asked for a "featured explanation" was because many of the comic explanations we currently have are sub-par, and we're almost at our initial goal of explaining all comics. A "featured explanation" would drive our editors towards the goal of having complete and good explanation towards all comics, and would allow us to know which explanations need elaboration.
:: P.S. My definition of complete explanation would be - To have a good explanation, To have all categories relevant, To link to any comics related and To explain any technical portions of the comic.
:: [[Special:Contributions/117.194.82.49|117.194.82.49]] 07:45, 8 May 2013 (UTC)
:::That message on the front page is going to link to all the pages marked by the incomplete template. If you find an unsatisfactory explanation, please mark it with <nowiki>{{incomplete}}</nowiki> '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 07:54, 8 May 2013 (UTC)
:::: By my definition, I think all comics will be incomplete. An incomplete template will be focused more towards improving the worst explanations, while a featured one will be to improve the best ones. Since we already have the former, we should focus on the latter. Just my 2 cents. [[Special:Contributions/117.194.85.82|117.194.85.82]] 06:55, 9 May 2013 (UTC)

== Split the list of all comics ==

[[List of all comics]] is getting larger and larger, which makes it hard to read and hard to edit. How about splitting into parts, say [[List of all comics/1-1000]], [[List of all comics/1001-2000]], etc., or something to that effect? --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 17:39, 1 May 2013 (UTC)

: Done. [[Special:Contributions/117.194.88.176|117.194.88.176]] 10:03, 9 May 2013 (UTC)
::Great job, thanks! [[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 11:09, 9 May 2013 (UTC)
:::And I've added back [[List of all comics (full)]], which allows, for example, listing all comics by alphabetical order.[[User:Markhurd|Mark Hurd]] ([[User talk:Markhurd|talk]]) 17:29, 10 May 2013 (UTC)

== Sidebar ads ==

''Moved from [[Talk:Main Page]] –– [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 08:06, 4 May 2013 (UTC)''

Are they generating significant money? The ones I see are pretty sleazy looking and/or scammy - "Power Companies Hate this Device! - click here to break the laws of thermodynamics!" and "Debt relief program click here to lose more money". How much money are they generating? Can you set any selections to remove the sleazy ads? [[User:J-beda|J-beda]] ([[User talk:J-beda|talk]]) 18:30, 3 April 2013 (UTC)
:Do we have sleazy sidebar ads? Since when? Thanks Google Chrome and AdBlock, I had no idea! –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 07:47, 14 April 2013 (UTC)
::People give 20$ a pop to get a bunch of clicks on explainxkcd, and Jeff uses that money to buy a faster server with a hard drive that doesn't have less space than a public toilet with an elephant in it. It'd be really nice if you didn't turn on adblock, the money is appreciated. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 08:47, 14 April 2013 (UTC)
:::It's a question of me not turning it off specifically every time I visit this site. More importantly, I do think people would be more likely to click the "donate" if it weren't irrelevant ads around it. –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 19:29, 14 April 2013 (UTC)
:::Generating money is a great thing. Getting "20$ a pop to get a bunch of clicks" is a bit unclear. Do the ads only generate revenue when clicked on? So EXKCD only gets money when someone actually falls for the sleazy ads? I know lots of people do not like Google - but at least their adsense stuff is relevant to the content of the website, which might generate some legitimate traffic for a legitimate advertiser.... [[User:J-beda|J-beda]] ([[User talk:J-beda|talk]]) 11:48, 19 April 2013 (UTC)
::::Welllll, I didn't pick the ad supplier. You could bring it up with [[User talk:Jeff|Jeff]] if you want, I think he picked the ad provider on basis of which one had a mediawiki plugin or something. If you can link Jeff to a quick and easy way to put adsense on mediawiki, he should change it quickly enough. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 14:21, 19 April 2013 (UTC)
:::::And I also gather then that they are only a temporary thing? -- [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 08:27, 24 April 2013 (UTC)
::::::Until we can buy a server that doesn't poop itself every time a new comic is released, the ads are staying. If you want them to go away sooner, throw more money at Jeff. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 09:25, 24 April 2013 (UTC)
::::::: The ads are crap. For sure. Wish I didn't have to run them, but I don't trust donations alone to hold up continually some better hosting. The ads really don't bring in that much $$$. I had google adsense before, but Google shutdown my adsense account for unnamed reason after 1 week. This new ad service is way sketchier. If you all think they don't have a place here, I'll ax 'em. --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 16:02, 24 April 2013 (UTC)
::::::: Thanks for the info Jeff. How much ad money are we talking about? Is it calculated on how many ads are displayed or how many are clicked-through? How close to the goal is the server fund? How about a Kickstarter campaign for the server? $10 gets your name on a thankyou webpage or something like that. [[User:J-beda|J-beda]] ([[User talk:J-beda|talk]]) 17:32, 24 April 2013 (UTC)
:::::::: It ain't much, last I looked it was $2 or $3 in 2 weeks. I believe it is based on clicks, it is not nearly as clear as Google adsense. I'm not really interested in doing a Kickstarter. I think the donations will cover the initial start up, I just want to be able to cover the monthly costs as well. A few things are still up in the air. --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 16:24, 25 April 2013 (UTC)
:::::::::Can you find a way to show the donations and ad income on the site, to make it transparent? ––[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 15:30, 30 April 2013 (UTC)
::::::::: How about a donation amount that you'll take to turn it (the annoying unethical scummy ads) off for a year? Give me a dollar value and I might step up for the good of us all! [[User:J-beda|J-beda]] ([[User talk:J-beda|talk]]) 16:28, 3 May 2013 (UTC)

== Economic transparency ==

I think this is very important: How can we make the donations and ad-income transparent, so that we all can see when and how much money is coming in, and how far we are from reaching our goal? – [[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 00:35, 24 May 2013 (UTC)
: Sounds fine to me, I think I can put something together. --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 15:52, 28 May 2013 (UTC)
::Hi, may I bump this issue? Or maybe you have done something, and I missed it? Anyway, I would still appreciate it! –[[User:St.nerol|St.nerol]] ([[User talk:St.nerol|talk]]) 17:43, 22 February 2014 (UTC)
:::Numberssss. I'll get on with it, just need less homework and a few more numbers. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 07:54, 23 February 2014 (UTC)

== Using <nowiki><nowiki></nowiki></nowiki> in transcripts to improve accuracy ==

In the transcripts, <nowiki>[[lines]]</nowiki> are being changed to [lines] in order to avoid auto-linking. Why not just surround these with <nowiki><nowiki></nowiki></nowiki> tags and avoid the problem entirely? --[[User:Epauley|Epauley]] ([[User talk:Epauley|talk]]) 04:18, 16 June 2013 (UTC)
:Because it takes less time to type and single brackets are just as readable as double brackets to visitors. It's also a bit more readable in the editor. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 09:55, 16 June 2013 (UTC)

== Category: (Barred/banned from?) Conferences ==

I come here after realising I erroneously posted (in reply) to the Main page Talk, being anonymous (or at least IP-only) and without a list of qualifying articles to support me, just yet, but still wish to put forward the above category before I forget. There's no apparent equivalent, that I found, but it's definitely a recurring meme. I should be back (named or otherwise) with my suggested list of members, if someone else doesn't get there first, but I thought I'd start with the placemarker. [[Special:Contributions/178.98.31.27|178.98.31.27]] 16:41, 22 June 2013 (UTC)
:Ok, so I got the bee in my bonnet and spent a few minutes actually looking into this. Revising "Barred from Conferences" (actually more often "Banned" or even "Thrown out of"/equivalent) to just "Conferences", the subset of comics that I can easily find that are involved is *[[153]], *[[177]], *[[365]], *[[410]], *[[463]], *[[541]], [[545]], [[685]], [[829]] and [[867]], but I'm sure there are more recent ones that I didn't spot/recall. One alternative title to "Conferences" is "Presentations", and I'm sure if I'd searched for that I'd have found more potential candidates (less some that might ''exit'' the renamed category). The asterisked ones ''do'' deal with being barred/banned/thrown out/etc, making it still a suitable category in its own right, IMO, but I'll leave it up to your combined musings to decide. [[Special:Contributions/178.98.31.27|178.98.31.27]] 17:07, 22 June 2013 (UTC)
::I add [[690]] to the list. --[[User:Chtz|Chtz]] ([[User talk:Chtz|talk]]) 08:12, 13 September 2013 (UTC)

::: Great suggestions! I created [[:Category:Public speaking]] and [[:Category:Banned from conferences]]. I also added [[Wikipedian Protester]] to the mix, of course :) --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 21:59, 13 November 2013 (UTC)

== Strip Title ==

For someone who commonly browses explainxkcd in place of xkcd, and hence often see the strips for the first time here rather than the parent site, I find it somewhat odd that the 'Title Text' is so poorly displayed given how critical it can be to the strip.

I propose that, while retaining the given name (perhaps moving it top left), the title text be enlarged and relocated to being over the strip as originally intended. {{unsigned ip|175.41.133.18}}
:The title text is placed very well at bottom of the image.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 07:20, 6 September 2013 (UTC)

:I would have to agree with Dgbrt, it's placed nicely at the bottom, and there is no need for it to be moved. My reasoning is that you never actually read the title text first, you read it last. Making it <code>text-align: left;</code> does not make sense, because the image is centered (just like on xkcd.com). I also believe that there is no need for it to be re-sized, mainly due to the fact that it is slightly larger than the title text (for me, at least). {{User:Grep/signature|05:18, 08 September 2013}}

:Plus, if you hover over the image, it's the same as on xkcd.com {{User:Grep/signature|06:13, 08 September 2013}}

:I also agree with Dgbrt and Grep. The title text is kind of a bonus and should not be emphasized more than on the original page. On the original site you only see it before the image, if you have very slow internet access (or very fast eyes) --[[User:Chtz|Chtz]] ([[User talk:Chtz|talk]]) 08:06, 2 October 2013 (UTC)

== Sections in talk pages ==

Is there a reason why there are no sections in talk pages? It is not a very big deal, but especially for longer talk pages it would make editing be much handier, especially when using the preview function (not having to find the section every time). Also it automatically adds a description to the history (thus makes it more easy to look for certain edits, or decide by just looking at the [[Special:RecentChanges]], if a comment should concern you. --[[User:Chtz|Chtz]] ([[User talk:Chtz|talk]]) 08:01, 2 October 2013 (UTC)
:When discussion pages are transcluded by the comic discussion template, section headers carry over from talk pages and bad things happen. Using ; to denote headers instead of equals signs works well, and doesn't share transclusion pain. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 08:04, 2 October 2013 (UTC)

== references ==

Any chance we can add [https://www.mediawiki.org/wiki/Extension:Cite/Cite.php cite.php] to this wiki? Most pages don't need it, but some comics take on a life of their own and being able to add reference tags would be really helpful for those. [[User:LadyMondegreen|LadyMondegreen]] ([[User talk:LadyMondegreen|talk]]) 01:33, 9 October 2013 (UTC)
: Cite has been added to the wiki. Thanks for the suggestion! --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 01:35, 17 October 2013 (UTC)

== Stylized writing ==

I understand that this wiki isn't as formal as wikipedia or sites like that but it seems that there are a few questionable practices:

1. The use of questions - when a non-rhetorical or unnecessary question is entered into the explanation.

2. Extremely painted/biased view points - when there is obvious bias in the tone of the explanation of the contributor, in other
words; a lack of neutrality.

3. Extreme repetition/rehashing - the explanation restates things and makes for a long and tedious read when a more straight-forward explanation is possible and clearer.

4. The general informality - "This one's an easy one" "This is simple" "this one's straightforward" "You're an idiot for not understanding this one" etc.

5. Many other practices that make the explanation hard to read, difficult to understand, or plain ugly.

I know that there are disparaging view points on how a comic should be explained, but please let's clean up the site a bit, acknowledge each view point and report on all of them and then tighten up the sloppy writing. Carry out arguments in the talk section, not the explanation. Perhaps we could first try to say the majority view point on the interpretation and then write the alternate explanations, of course this would bring up the debate on which is the majority explanation. Either way, more complete, logical explanations should be given more credence. --[[User:Lackadaisical|Lackadaisical]] ([[User talk:Lackadaisical|talk]]) 00:25, 23 October 2013 (UTC)

:I agree with 2-5. 1, on the other hand, is sometimes useful and can contribute the to explanation, although 1 is still a very good point. I would say that you should edit it to have "arguments in the talk" be a 6th point as well. Unfortunately, though, we are not all logical, comic-understanding machines here, so minor deviations of these rules are still to be expected. But I think that overall, these are good rules, even if 2/3 are sort of part of 5.
:[[User:Lackadaisical|Lackadaisical]], please sign your post with <nowiki>~~~~</nowiki>{{User:Grep/signature|23:55, 22 October 2013}}

:I understand the use of questions in certain parts. And it was probably better to put the others as sub-categories to five but I wanted to show some common things that can be easily fixed. I know that some explanations require a lot of text and extensive research because of the abstract subjects Randall deals with and that it's difficult to be completely standardized but I think it would be good for us to try to come up with some general things to try to avoid to help the explanations "flow" --[[User:Lackadaisical|Lackadaisical]] ([[User talk:Lackadaisical|talk]]) 00:25, 23 October 2013 (UTC)
::Most of that isn't intentional, it's just an awful lot of labor to copy check all the explanations. I've been going through all the current articles and fixing consistency issues, the worst being wrong transcript/title text/dates and the most benign being wikilinks, spelling and trailing spaces. I'm at 682 so far, but my next pass will be on actual language and content, and it'll probably take longer. It takes a while though, and you can totally work on improving language in articles if you want to. Some explanations were pulled from the old blog, some were written and just got lost in the changelog. Copy editing everything we have so far is a very labor-intensive job, and the only way to really deal with it is to knuckle down and do it, or form a wikiproject and hope to heaven that visitors feel charitable enough to join in on it. I'd *probably* push to finish up all our incomplete articles first though, just because that's more directly related to the purpose of the site; tone and style probably comes second to having correct explanations. That doesn't mean you can't do it yourself, it's just that I'll probably only dedicate the subheader on the main page to one project at a time and our current biggest bugbear hasn't been solved yet. I could put up a sitenotice to see if that speeds the process up any. I'll do that when I get back home. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 03:31, 23 October 2013 (UTC)

== Easy redirect to comic? ==

I've been thinking, and there is one thing that would make navigating to the explained comics easier. My method of browsing is I'll see the comic on xkcd.com first, and if there is something curious about it that I don't quite understand, I'll come here. Sometimes it can be a bit troublesome, going to the homepage and then navigatiing to the right comic. Not too bad, but I'd like an easy way to go direct. So I was thinking, what if you had a redirect such that if you typed in, for example, www.explainxkcd.com/505, you would get redirected to http://www.explainxkcd.com/wiki/index.php?title=505:_A_Bunch_of_Rocks. That would mean that you could get to the comic just from adding an "explain" to the start of the xkcd.com URL. I don't know if that is at all possible, but it would be pretty handy if it happened. Thoughts?
[[User:Alcatraz ii|Alcatraz ii]] ([[User talk:Alcatraz ii|talk]]) 03:01, 25 October 2013 (UTC)
:[http://www.explainxkcd.com/wiki/index.php?title=explain_xkcd:Community_portal/Technical#Redirect_from_explainxkcd.com.2F1234 That's actually already on the to-do list.] I'm testing it right now and we should have it up soon. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 04:02, 25 October 2013 (UTC)
:: Awesome :) [[User:Alcatraz ii|Alcatraz ii]] ([[User talk:Alcatraz ii|talk]]) 03:26, 1 November 2013 (UTC)
:::Whoop, forgot to mark this as complete. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 04:37, 1 November 2013 (UTC)
:::: Done! Copy this and drag it to your bookmarks bar: |javascript: var url = document.URL; document.location = url.replace('xkcd.com','explainxkcd.com');| {{unsigned ip|173.245.52.29}}
:::::The feature requested here has also long since been implemented. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 22:20, 4 April 2014 (UTC)

== Increase support via prominent display of copyright and license for text submitted to explainxkcd ==

XKCD itself is rather liberally licensed, and gets lots of good will from that. As it says on the bottom of every page "This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License." For details see [http://xkcd.com/license.html xkcd - A Webcomic - License].

But I found nothing on most pages of explainxkcd about copyright or licensing, and it discouraged me from contributing or donating. Finally, as I was writing this proposal up, I found a link on the editing page here: [http://www.explainxkcd.com/wiki/index.php?title=explain_xkcd:Copyrights explain xkcd:Copyrights - explain xkcd] saying that "''The Explain XKCD wiki is generally licensed under the Creative Commons Attribution-ShareAlike 3.0 license (CC-BY-SA-3.0)''". That notice should be more prominent on the site, with at least a link on each page. [[User:Nealmcb|Nealmcb]] ([[User talk:Nealmcb|talk]]) 15:27, 5 November 2013 (UTC)
:This should be mentioned at the main page, including a reference to the xkcd origin.
:BTW: NO DOUBLE SPACES after a sentence. Are you US guys still using a typewriter? It's not rendered at a web page and stupid like Gallons, Miles, Foots, and much more unique US behaviours. But that's just a joke beside.
:The licence hint is much more important, you are just correct.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:12, 5 November 2013 (UTC)
::Added a creative commons icon to the footer of the page, next to the powered by mediawiki button. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 22:16, 5 November 2013 (UTC)

== New Comics Bot ==

Would there be need for such a thing?
[[Special:Contributions/108.162.231.52|108.162.231.52]] Synthetica
:Nice idea, I never thought about that before. I will do some tests on existing comics to check if this could reduce the current number of error posts for a new article. When that is ready and working I will talk to some admins. My bot account [[User:DgbrtBOT|DgbrtBOT]] was originally intended for [[1190: Time]] picture uploads, but I never have used it because Time was over. Creating the new pages should be easy in general, avoiding errors will cost some more work. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:31, 6 November 2013 (UTC)
::If you can get dgbrtBOT to do that, that'd help us an awful lot. It'd allow us to get rid of the ifexist cases in template:LATESTCOMIC as well, since the bot could change automatically that whenever a new comic goes up. It'll also help us get new comics down almost the moment they pop up, since the bot could sample several times a minute until a comic is posted. So long as it gets the general pattern right so that we have a correct page set up, we're good. An admin can come in sometime later to clean up categories and image urls and other piddly easy-to-fix details. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 20:54, 6 November 2013 (UTC)
:::I will work on this next weekend, just local scripts and no updates here. I also will talk about my results before any automatic updates will be activated. My first focus is on creating the new pages in the general pattern, LATESTCOMIC and also the page "All comics" are maybe a bonus later. And of course all my scripts will be open source.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:44, 6 November 2013 (UTC)
::::The first version is ready and I will test it at my local wiki. If everything goes well I could activate it for Wednesday (2013-11-13). LATESTCOMIC and "All comics" are on my roadmap, but first I want produce correct new pages here. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:00, 10 November 2013 (UTC)
:::::Righty ho. Here goes. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 20:36, 10 November 2013 (UTC)
Even when my automatic local wiki test did fail today, just a damn wrong password, I will activate the bot here for Wednesday. It will only run from 4:00 PM until 8:00 PM UTC. You will not see my possible updates at [[Special:RecentChanges]] unless you click ''Show bots'' at the top of that page. LATESTCOMIC and "All comics" are not covered, but this is at my TODO list until this test will be successful. Give me a '''GO''' or '''NO-GO''' for this test.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:49, 11 November 2013 (UTC)
:Easily a GO, I'll be ready to clean up if anything goes wrong. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 22:08, 11 November 2013 (UTC)
::So be ready on Wednesday for the clean up. My worst case is ''it simply does not work'', second worse scenario is still that I could delete some contend already posted here, but I'm trying to avoid this. ''Huston'', the countdown clock is counting. I'm joking about this because I really want to be confident about this ''BOT'' or ROBOT or uncontrolled action here.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 00:28, 12 November 2013 (UTC)
:::The bot can't do anything that I can't reverse. I can even restore a backup from an hour before the bot's edits if it manages to break the database. How quickly does it poll xkcd, by the way? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 07:53, 12 November 2013 (UTC)

First live test here (comic 1289). Please delete this page: [[Simple_Answers:_1289]]. Since my local wiki did not provide this templates I could not see this error before. In general the bot will update pages differ to any existing pages, but when it is not changed no update will happen. I'm fixing this errors at my script and do a second test here soon. I want to see it's producing correct pages until the bot will do it's work when I'm sleeping.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:31, 12 November 2013 (UTC)
:Ok, test are done here, BOT is scheduled for the next update. Polling is every five minutes on Mon, Wed, and Fri from 04:00 until 08:00 UTC. Let's see how it will work.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 23:08, 12 November 2013 (UTC)
::Couldja ramp that up to once/twice a minute, push the start time back by an hour, and the end time by a few hours? Also, is it possible to terminate it once it finds a comic for a certain day? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 01:45, 13 November 2013 (UTC)
:::It worked! Though it posted the comic 5 minutes past post time. We has technology now, we can afford to poll faster and closer, yeah? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 05:32, 13 November 2013 (UTC)
Uhh, it worked... I will increase the polls when I'm more confident about the release times. Today it was approx. 05:00 UTC (GMT) or 01:00 EST (Randall's time zone). Looks like he is still at daylight saving time, would have been 00:00 EDT. The polls will be increased to one minute when I'm sure about the Standard Release Time (SRT). Next steps for the next update on Friday are:
:The "All comics" page.
:The LATESTCOMIC template.
--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 19:54, 13 November 2013 (UTC)
:The LATESTCOMIC template is included for the next run, it just simply has to return a number. But it's still the most critical part because if it does not work the Main Page is broken. I will change this to a better solution using that IFEXIST syntax soon. The list of all comics is still at my ToDo list. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:06, 14 November 2013 (UTC)
::The desired content of the LATESTCOMIC template should be just the comic number. If we can get out of having to poll multiple IFEXIST statements to find the latest comic, that would be a fantastic boon to our server performance. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 04:43, 15 November 2013 (UTC)
:::OK, it did work today so I will not change this. Next step is the list for all comics.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 11:10, 15 November 2013 (UTC)
Next run will include an update on the "All comics" page. I'm crossing my fingers. When this update is also successful I will document my Bot at the Bot user page [[User:DgbrtBOT]]. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:15, 17 November 2013 (UTC)
:Oh, I forgot this detail: The bot is starting at 00:00 EST (RLT - Randall local time), which is 04:00 UTC and 05:00 MET for me. It polls every 5 minutes until 23:55 MET (22:55 UTC, 18:55 RLT) the main page until a new comic is found. I do not poll the comic number because I want to avoid 404 message logs at the servers.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:30, 17 November 2013 (UTC)
:Something went wrong there. That's gonna need fixing. I am enjoying the looks of the apparently faster polling though. Maybe you could also set the start time to 00:00:05 EST to catch the on-time xkcd releases within ten seconds? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 05:33, 18 November 2013 (UTC)
::Uh, what a mess. I will do some more tests at my local wiki. At the next time I will do a check against the number from the LATESTCOMIC template, only the next number will be processed. The test against my local history did fail because of some cleanups after testings.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 08:18, 18 November 2013 (UTC)
:::I don't like mess. So the BOT got many more checks before posting here but the bot was starting at 05:00 local time for me. I'm really asleep at that time. The mess here was covered, but I do need another GO for the next attempt. Otherwise I will just do a test to my local wiki.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:35, 18 November 2013 (UTC)
No GO so far, my next test will run only at my local wiki.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:16, 19 November 2013 (UTC)
:My script is here: [https://github.com/dgbrt/explainXKCD_update explainXKCD_update]. At my current test "explainxkcd.com" is commented out and "localhost" is active. Since I don't like mess and the bot does act while I am sleeping the next update must be done manually here. I'm hoping the bot will be ready for the next update on Friday.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:15, 19 November 2013 (UTC)
::Bot is ready for Friday, everything went smooth at my last local test today. The bot did find the latest comic at 04:05 UTC and all essential pages were properly created. So I will activate it for this site again. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:57, 20 November 2013 (UTC)
Bot did work as expected. So I name it release 1.1337, the next planed release will be 2.1337 (beta) because of this two issues:
*"Include any categories below this line." will be removed because it doesn't make any sense any more.
*BETA: I want to use the full template features at [[List of all comics]], just ensuring that the pictures are working properly. No need for this at the most comics, but the BOT doesn't cover all possibilities on corrupt file names like we have had in "Pi vs. Tau". The picture was without that dot. My bot just shows the real link it did upload here.
I'm pretty sure we will have some issues on this bot, but for general pages it should work. So the bot will be active on Mon,Wed,Fri from 0:00 EST (or EDT) every five minutes until it did found a new comic, on success the bot does not poll any more.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:51, 22 November 2013 (UTC)
:Aww, it's a bot. It doesn't need to rest or take time off to do other stuff. It can totally poll once or more times per minute. Also, if you set the start time to a few seconds after midnight, Randall time, when he uploads a comic on-time, you'll get it within a few seconds as opposed to having to wait for the next polling. As for the image names, maybe you could convert spaces in the comic name to underscores, compare the two comic names you have and use that to decide which version of the template to use? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 23:08, 22 November 2013 (UTC)
::I have to avoid that the bot is running twice, Internet Timeouts and more. And the comics are also published later sometimes. Look at my release [https://github.com/dgbrt/explainXKCD_update 1.1337], release 2.1337 will be later, Maybe I should start at 2 minutes after 0:00, but let's see right now how the bot does work. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 00:38, 23 November 2013 (UTC)
Uhh, what a huge discussion here. The bot will get a major update soon: Scheduler does start it once and until a comic is found and uploaded it here or an other limit is reached (maybe the end of the day) the bot will poll by a small delay. But every poll is still an entire download from the main page, When a new comic is found bot stops.
:Why, you could use http://xkcd.com/info.0.json, right?[[Special:Contributions/108.162.231.52|108.162.231.52]] 07:38, 2 December 2013 (UTC)Synthetica
::The BOT performs perfect and I prefer to analyze the original page. A title text like the one from today (a text showing a link) will be covered in the future.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 10:35, 2 December 2013 (UTC)
A great enhancement would be also covering a new comic like 1190 Time was. I'm looking forward on this, some ideas, it does require a complete analyse of the page and then finding some strange content.
--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 23:05, 27 November 2013 (UTC)

== Require description for 'incomplete' tags ==
I've been trying to fix some of the incompletes, but several explanation pages I've come across are tagged incomplete without any reason given. The reason should be a required part of the tag. --[[Special:Contributions/173.245.52.223|173.245.52.223]] 03:35, 7 December 2013 (UTC)
:This incomplete tags are just older than the recent change of that template. Current adds require a description, but it's not easy to figure out all that old reasons. If someone does find a reason, please just add it. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 20:22, 7 December 2013 (UTC)

== Should there be a subwiki to cover the shop links that appear above the comic? ==

The current one (as of writing) is [http://imgs.xkcd.com/store_news/store_gd_b11_1ze4.png] but this is a different than the usual, and there was also a third in between these.
[[User:Rsranger65|Rsranger65]] ([[User talk:Rsranger65|talk]]) 06:00, 8 December 2013 (UTC)
:Those are very ephemeral. They aren't going to exist for very long, I don't know how valuable it would be to archive that stuff. We could probably do it, but having to figure out another naming convention and all for advertisements doesn't appeal to me at the current moment. If you can flesh it out, I'd love to see how you think we should do it. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 07:24, 8 December 2013 (UTC)

== New Character ==

OK, I think we need a name for the character with a goatee and glasses in comics [[435: Purity]], [[796: Bad Ex]] and [[964: Dorm Poster]] as well as possibly others. Edit: oh and I suggest Goatee and Glasses Guy, but I'm open for suggestions Edit 2: also in [[826: Guest Week: Zach Weiner (SMBC)]] Halfhat {{unsigned|Halfhat}}
edit 3: Another sighting [[954: Chin-Up Bar]] [[User:Halfhat|Halfhat]] ([[User talk:Halfhat|talk]]) 16:57, 13 January 2014 (UTC)
: In the transcript, he is called "Person with Glasses and a Goatee" --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 15:39, 21 March 2014 (UTC)
:: "Glasses Guy", "Goatee Guy" are both probably descriptive enough! --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 15:41, 21 March 2014 (UTC)

== What If Comics ==

Hi, I was thinking, maybe at some point we should do the comics in the ''What If?'' section, like [http://what-if.xkcd.com/imgs/a/36/cornstarch_bitcoins.png this one.] [[User:Halfhat|Halfhat]] ([[User talk:Halfhat|talk]]) 20:01, 13 January 2014 (UTC)
: Start creating the pages for them! --[[User:Jeff|Jeff]] ([[User talk:Jeff|talk]]) 15:36, 21 March 2014 (UTC)
: I think I can start creating one or two pages for What If, if that helps... [[User:Daniel Carrero|Daniel Carrero]] ([[User talk:Daniel Carrero|talk]]) 16:14, 5 April 2014 (UTC)
:: If nobody has any problem with it, I'm gonna give it a try later. :) [[User:Daniel Carrero|Daniel Carrero]] ([[User talk:Daniel Carrero|talk]]) 13:14, 8 April 2014 (UTC)
:::I thought they were already pretty self-explanatory though. Also, how are we gonna organize and present them? '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 16:31, 8 April 2014 (UTC)
::::I totally agree with David: Read the entire What-If page and follow the links provided by Randall. No one of us can do that better in depth. But an overview page for this site is maybe not a bad idea, we just need a proper link here — a link at the main menu on the left. Translations to other languages are just another issue. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:37, 8 April 2014 (UTC)
:::::Yes, I was thinking of an overview, summarizing the contents and discoveries of each what if page. Not to mention, we could also organize what if pages by categories, such as physics/love.
:::::Would you like me to post here an example of what I would write? That way we can decide if it's worthy of creating an actual page. [[User:Daniel Carrero|Daniel Carrero]] ([[User talk:Daniel Carrero|talk]]) 12:53, 9 April 2014 (UTC)

== Transcripts ==

The whole point of the transcripts is to have those who are unable to view images to still be able to read the comic, right?

Then why is it required to stick to strictly official transcripts, where sometimes rewriting them slightly would make them flow better or otherwise get the ideas across better? I've tried rewriting a few, but they get reverted. I think that having easier-to-understand transcripts would be more important than strictly following official transcripts; what do you think? (For a few examples, see [http://www.explainxkcd.com/wiki/index.php?title=207:_What_xkcd_Means&diff=60061&oldid=57400 this edit] and [http://www.explainxkcd.com/wiki/index.php?title=995%3A_Coinstar&diff=59862&oldid=57316 this edit]. [[User:Zowayix|Zowayix]] ([[User talk:Zowayix|talk]]) 17:38, 19 February 2014 (UTC)
:We use the original transcript to try and deduce original author intent if it's unclear from the image. I remember one comic where Beret Guy was off in the distance and it was difficult to distinguish him from the image, but the official transcript said it was him. We don't stick to the original transcript if it's obviously wrong, or it has typographical errors: see [[Laser Scope]]. Those edits seem to be mainly targeted at language and clarity, and should be fine. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 23:06, 19 February 2014 (UTC)
::Would it be helpful to have another (optional) section for expanding on the official transcripts? I too think it could be helpful, especially for complex images (such as 1079/United Shapes [http://www.explainxkcd.com/wiki/index.php/1079]). Or does supplemental description belong in the Explanation sections? Cheers. [[User:Karenb|Karenb]] ([[User talk:Karenb|talk]]) 23:00, 20 March 2014 (UTC)
:::Naaah, how many people even know there's an original transcript? If the original is wrong, change it. If your additions begin to verge on explanatory, move eet to the trivia/explanation sections. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 00:52, 21 March 2014 (UTC)

== "Characters in this Comic" section ==

Should there be a "Characters in this Comic" section in each comic explanation? (I feel like this should be longer but don't have anything else to say.) [[User:Z|Z]] ([[User talk:Z|talk]]) 23:33, 11 May 2014 (UTC)

:There is a Category section at the bottom of each comic. Just scroll down and you will see any character belonging to a specific comic. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 21:50, 12 May 2014 (UTC)

== Adding the Radiation chart from XKCD ==

Hi
As there are already other comics with explanations even though they are not part of the number system.
This one does not seem to have any yet:
http://xkcd.com/radiation/
And as it is very alike the Money strip (the unexplained of the week) so I think it should be explained as well.
If you agree please add it as I'm not sure how to do that.

Best regards
:[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 18:47, 7 June 2014 (UTC)

== Reddit comments? ==

There should be a link in each comics explanation page somewhere linking to the comment section for the relevant comic on /r/xkcdcomic or reddit.
:The reddit comments page isn't ''that'' close to what we do though. If this is more popular, we'll do it, though there'll need to be a fair bit of post-hoc editing since I don't think there's a standard URL scheme for all the past comics. '''[[User:Davidy22|{{Color|#707|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 03:15, 23 June 2014 (UTC)

== Not insulting new users ==

I am writing a response to a vulnerability assessment. I have included a link to http://www.explainxkcd.com/wiki/index.php/936 noting that it contains a good explanation of the relative security of passwords vs passphrases. I just noticed that the top of that page contains "Explain xkcd: It's 'cause you're dumb." Looks like I'll have to find a different site to link to. --[[User:Pascal|Pascal]] ([[User talk:Pascal|talk]]) 17:33, 28 June 2014 (UTC)

1383: Magic Words

2014-06-18T04:48:10Z

Pascal: /* Transcript */ Women -> Woman

{{comic
| number = 1383
| date = June 18, 2014
| title = Magic Words
| image = magic_words.png
| titletext = 'And then whisper 'anapest' in my ear as you hold me?'
}}

==Explanation==
This comic is making a play on words with the word "foot", in this case referring to (according to Wikipedia) "the basic metrical unit that generates a line of verse in most Western traditions of poetry."

Common types of feet include:
*"trochee" - stressed syllable followed by an unstressed one (demonstrated in the first set of words: "'''sto'''-ry", "'''wa'''-ter", "'''pa'''-per", "'''door'''-way") (see also [[856|comic 856]])
*"iamb" - a short syllable followed by a long (as seen in the second set: "dis-'''arm'''", "A-'''dele's'''", "gi-'''raffe'''", "gre-'''nade'''")
*"dactyl" - long syllable followed by two short syllables (used in the third set: "'''straw'''-ber-ry", "'''scor'''-pi-on", "'''po'''-et-ry")
*"anapest" - two short syllables followed by a long one (referenced in the title text)

==Transcript==

Woman in bed: Can you repeat "Story Water Paper Doorway" at the start,

then switch to "Disarm Adele's Giraffe Grenade" as we get going,

and finally "Strawberry Scorpion Poetry" as I finish?

[Text below the frame]

Linguist with a foot fetish

{{comic discussion}}