explain xkcd - User contributions [en]

verizon

2025-05-13T18:18:58Z

WaddleDeo: /* Explanation */ Math. (Preliminary)

{{comic
| title = verizon
| lappend = verizon
| before = <div class="plainlinks"> 
In response to George Vaccaro's [https://verizonmath.blogspot.com horrifying encounters] with the Verizon billing department over the difference between dollars and cents (and other basic math): 
[[File:verizon.jpg|link=https://xkcd.com]] 
[https://verizonmath.blogspot.com verizonmath.blogspot.com] 
Click [https://imgs.xkcd.com/verizon_billing.mp3 here] for the full audio of the verizon call (warning: will make you throw your computer in frustration). -- [https://xkcd.com xkcd]</div>
}}

==Explanation==
{{misc page}}
{{quote|
"Do you recognise there's a difference between 1 dollar and 1 cent?"

"Definitely."

"Do you recognise there's a difference between half a dollar and half a cent?"

"Definitely."

"Then, do you therefore, do you recognise there's a difference between 0.002 dollars and 0.002 cents?"

"No."}}

[[e to the pi times i]] equals -1. The sum is equivalent to {{w|1/2 + 1/4 + 1/8 + 1/16 + ⋯}}, which equals 1.

As such, the number ends up being 0.002 dollars. (0.002-1+1)

==Transcript==
{{incomplete transcript|Don't remove this notice too soon.}}

{{comic discussion}}

Forums

2025-04-23T17:27:29Z

WaddleDeo: More stuff, linking, dates. Good old OTT.

{{notice2|This article is a stub, please help us finish it!}}

{{incomplete|
This page was created recently, help by adding what it was, when, and why it shut down, relevant Web Archive links, etc. Also add the logo. You can see a '''[https://web.archive.org/web/20230000000000*/https://forums.xkcd.com/ history of the site here]!'''}}

The '''xkcd forums''' were available at https://forums.xkcd.com before it was shut down due to what? see here: password leakage. They were shut down on August 31st, 2019.

The last day it can be found on the web archive is [https://web.archive.org/web/20200803203354/https://forums.xkcd.com/ August 3rd, 2020].

:503 Service Unavailable
:The xkcd forums are currently offline. We've been alerted that portions of the PHPBB user table from our forums showed up in a leaked data collection. The data includes usernames, email addresses, salted, hashed passwords, and in some cases an IP address from the time of registration.

:We’ve taken the forums offline until we can go over them and make sure they're secure. If you're an echochamber.me/xkcd forums user, you should immediately change your password for any other accounts on which you used the same or a similar password.

:from https://web.archive.org/web/20200115041712/https://forums.xkcd.com/index.php

This stayed like this until [when?]. That is the last saved version in the archive. The page seems to have been completely deleted after that, so there is no longer anything to save.

Several [[Links#2022-01-31|other changes]] happened to the links on [when was it removed?].

[[Category:Design of xkcd.com]]{{xkcdmeta}}

78: Garfield

2025-04-20T14:55:18Z

WaddleDeo: Moved a minor trivia bit to the trivia section, improved the transcript, and fixed a bit of wording.

{{comic
| number = 78
| date = March 20, 2006
| title = Garfield
| image = garfield.jpg
| titletext = The use of the 'Garfield' character for the purposes of this parody qualifies as fair use under the Copyright Act of 1976, 17 U.S.C. sec. 107. See Campbell v. Acuff-Rose Music (92-1292), 510 U.S. 569
}}

==Explanation==
The newspaper comic strip {{w|Garfield}}, which features an orange cat as the main character, has increasingly been known for repetitive, quality-lacking strips. In the past, this was because the creator, {{w|Jim Davis (cartoonist)|Jim Davis}}, prefers to explore the same subjects he is comfortable with but in different ways — or from a less charitable view, because the strip is intended for a wide audience and thus becomes homogenized and inoffensive by nature. This attitude has only become more pronounced in the 21st century, as the aging Davis becomes less and less interested in the franchise. Regardless of the reason, these strips are now {{w|Ghostwriter|ghost written}} with little input from Davis and rarely explore the unconventional. The comic is challenging Davis to do something unexpected and surprise us all. The comic also accuses Davis of being a "sellout", sticking to bourgeois/commercial logic, something that Dadaist artists challenged.

{{w|Dadaism}} was an artistic movement in the early 20th century marked primarily by chaos, irrationality, and surrealism. Some of the artists believed that the bourgeois logic made human beings unhappy and therefore led to war. [[Randall Munroe|Randall]] leads by example by featuring a strip that parodies the style of Garfield, with multiple colors (xkcd usually contains only black and white, with some few containing an additional color like red or yellow) and a character that is not a stick figure breaking the normal xkcd pattern. Another Dadaist aspect is the fact that while Garfield is smiling, he is communicating something that could be considered terrifying.

The title text explains that xkcd is exercising legal use of Davis's intellectual property, namely the title character of his comic. The Supreme Court case mentioned, ''{{w|Campbell v. Acuff-Rose Music}}'', confirmed that parody is legal even when there is commercial gain as a result, and also referenced the {{w|Copyright Act of 1976}}, 17 U.S.C. § 107, for the same reason. While this is normally understood by most anyone who questions such matters, Randall includes it as a reference to the lessening of strict copyright law, which many comics also mention, usually in the context of {{w|free software}} and those who promote it, like in the comics featuring [[Richard Stallman]].

==Transcript==
This strip takes the form of a parody of the traditional shape for sunday installments of newspaper strips; specifically the Half-page format.
:I want to see something unexpected in comics. Just one strip could make up for it all.
:[Garfield is standing on hind legs facing and looking directly at the camera. But is off-center in the frame, about 1/3 from the left, rotated very slightly clockwise.]
:[Zoom in on Garfield, still to the left, now rotated slightly counterclockwise.]
:[Zoom in again on Garfield, now the frame clips off the left side of his face.]
:Garfield thought bubble: The world is burning.
:[Final zoom in, the frame is ripped like a page, offset, and Garfield's eyes are half closed on the right half.]
:Garfield thought bubble: Run.
:Caption below the comic: Jim Davis, throw off your commercial shackles. Challenge us. Go out in a blaze of Dadaist glory. There is still time.

==Trivia==
*This is the first comic to use all-caps lettering, the second being [[90: Jacket]]. The all-caps lettering in this strip is likely due to the fact that most newspaper strips, such as Garfield, use all-caps lettering to make it easier to distinguish letters under poor printing quality quite possible with newsprint.
*The comic number (78) corresponds to the year Garfield debuted (1978).

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Comics featuring real people]]

1569: Magic Tree

2025-04-15T19:48:17Z

WaddleDeo: Trust me on this one. (Added safety information)

{{comic
| number = 1569
| date = August 26, 2015
| title = Magic Tree
| image = magic_tree.png
| titletext = Since people rarely try to cut down cell phone towers, after millions of years, as cell phone towers have gotten more treelike, trees have started growing fake cell phone tower attachments and shiny gray bark to protect themselves. This is a standard textbook example of convergent evolution.
}}

==Explanation==
{|style="float: right; border:1px solid dimgray; color:white" border="0" align="right" valign="top" cellpadding=10px cellspacing=0px
|+style="background:white; color:black"|'''Examples of camouflaged cell towers'''
|-align="center"
|[[Image:PalmCellTower.jpg|194x259px|Palm Cell Tower]]
|[[Image:AnotherCellTower.jpg|Cell Tower Tree]]
|}

This comic features a running theme in the xkcd comics, [[Beret Guy]]'s naïve and/or odd ways of thinking. In the beginning of the comic, Beret Guy shows [[Megan]] what he believes to be a tree, and explains that it grew there because he placed magic beans in that spot yesterday. This is a reference to the fable "{{w|Jack and the Beanstalk}}", where the protagonist plants several magical beans he acquired, resulting in a beanstalk growing which ascends into the atmosphere. Megan, however, tells Beret Guy that the "tree" is actually a {{w|cell site|cell phone tower}}. Beret Guy disagrees, pointing out that it has branches, to which Megan tries to explain that this was in an attempt to make the [https://commons.wikimedia.org/wiki/Category:Camouflaged_antenna_towers_and_masts towers look like trees]. She gives up, however, as Beret Guy has already begun climbing the tower, or because she fears that giving this explanation would only add fuel to the fire that is Beret Guy's imagination.

Later, Megan complains that her {{w|mobile phone signal|cell reception}} has disappeared. Beret Guy responds by saying that he had to cut down his "tree" because there were "scary giants with yellow helmets" in it (presumably, construction workers). This mirrors, again, the "Jack and the Beanstalk" fable, where the protagonist has to cut down his beanstalk to prevent the giant, whose lands the beanstalk connects to, from climbing down and chasing him. In reality, the "giants" were probably utility workers. Additionally, in reality it is a bad idea to cut down cell towers, as they contain dangerous electricity, as shown in the 2017 film {{w|Daddy's Home 2}}.

The title text suggests that, over time, trees will evolve to start looking more like cell phone towers in a form of {{w|mimicry}} in order to avoid people cutting them down. Mimicry is where a creature copies the appearance or behavior of another in order to confuse predators. In this scenario, the more defenseless trees attempt to mimic cell phone towers, which have the defense of people not wanting to cut them down or they would lose cell service (and likely a significant amount of money through fines) and because of society's general respect for the property of others, as well as the dangers of electrocution or radiation. This is similar to the counting pine, a tree in {{w|Terry Pratchett|Terry Pratchett's}} {{w|Discworld}} series that evolved to display its age with numbers on the outside (in the bark) in the hope that humans would not cut it down and count its rings. Of course now humans hunted it down trying to find a tree with numbers that would fit their house number instead, thus quickly rendering the trees almost completely extinct. (See the tribute to Terry in [[1498: Terry Pratchett]]).

{{w|Convergent evolution}} deals with multiple species acquiring similar characteristics to fulfill their role (such as dolphins and sharks both having a streamlined shape to swim fast) due to the species' common need to adapt to similar environments or tasks. [[Randall]] uses the term to describe the convergence in the appearances of cell towers whose design has "evolved" to include tree-like branches and trees which he predicts will evolve to resemble cell phone towers. Each of these "evolutions" would be for the purposes of camouflage, although the cell towers "evolve" by human design for purely aesthetic reasons and the trees would evolve naturally for self-preservation. This would therefore not be a true example of convergent evolution. It more closely resembles Batesian mimicry, or the evolutionary process by which a species remains noticeable, but treated as something it is not.

==Transcript==
:[Beret Guy and Megan stand next to a large pole with a note on it. Beret Guy points at the pole.]
:Beret Guy: Check it out! I threw my magic beans on the ground here yesterday, and this big tree appeared!

:[Zoom out, the pole is revealed to have branches. Around the pole are trees about 1/9th of the height of the pole.]
:Megan: That's a cell tower.
:Beret Guy: No way - it has branches!
:Beret Guy: See?
:Beret Guy: I'm gonna climb it!

:[Same as frame as the first. Beret Guy starts climbing the pole.]
:Megan: No, they just put those there to make it look-
:Megan: ...Never mind.

:[There is a caption in a small frame inlaid at the top of the last frame:]
:Later...
:[Megan looks at her phone while Beret Guy walks towards her holding an axe.]
:Megan: Why do I have no signal?
:Beret Guy: There were scary giants with yellow helmets in that tree! Luckily I cut it down before they ate me.

{{comic discussion}}
[[Category:Comics featuring Beret Guy]]
[[Category:Comics featuring Megan]]
[[Category:Biology]]
[[Category:Phones]]

Talk:961: Eternal Flame

2025-02-25T22:40:21Z

WaddleDeo: Commented. Why do we have these for talk pages?

Ugh, I hate it when people attribute everything the the technology to Steve Jobs. Apple spends pebbles on R&D, polishes up the work of other countries and they get labelled as inventors and heroes. Incredibly frustrating for the rest of us in the technology industry. '''[[User:Davidy22|{{Color|purple|David}}y²²]]'''[[User talk:Davidy22|<tt>[talk]</tt>]] 08:35, 9 March 2013 (UTC)
:I don't think Apple would polish up the work of other '''countries'''. [[User:InAndOutLand|InAndOutLand]] ([[User talk:InAndOutLand|talk]]) 01:51, 31 July 2014 (UTC)
::They work Very Hard, okay?[[User:WaddleDeo|WaddleDeo]] ([[User talk:WaddleDeo|talk]]) 22:40, 25 February 2025 (UTC)

:The way I see it, Apple's innovation is in their UI. The iPod wasn't the first portable digital music player, and the iPhone wasn't the first smartphone, but they ''were'' the first in their respective classes to have an intuitive interface that could easily be understood by someone with no technology background. Marketing is everything in the tech industry, and a product will fail if it can't ''convince'' the market that it's the better choice, even if it's absolutely better from a technical standpoint. [[User:Curtmack|Curtmack]] ([[User talk:Curtmack|talk]]) 18:36, 11 March 2013 (UTC)

:First of all, nothing in this comic attributes "everything in the technology industry" to Steve. Secondly, Apple spends more on R&D than most other companies – it's one of the reasons the markup is so high on Apple's products. Thirdly, if those "other companies" were just as good at design and execution as Apple, as you seem to believe, there would be nothing stopping them from achieving the same success as Apple. So what stopped Dell from releasing the iPhone and upsetting the mobile industry? What stopped HP from developing an online music store and totally upsetting the music industry? Either you're going to have to argue that everyone except Apple is just incredibly, incredibly unlucky, or you have to admit that there is something that Apple does that those companies don't. What that differentiating thing may be is open for debate, sure, but to say that everything they do is just a polish of some other company's work is simply ignorant. [[Special:Contributions/71.201.53.130|71.201.53.130]] 17:48, 1 October 2013 (UTC)

::Apple got lucky early on, and managed to get a fanbase, which they have basically brainwashed into thinking that Apple Products are automatically better than anything else. Secondly, I assume that it was not the comic itseld Davidy22 was referring to, but rather the explanation, which has since been changed. [[Special:Contributions/74.214.147.188|74.214.147.188]] 23:40, 24 October 2013 (UTC)

::: Brainwashed? The Apple II and the Macintosh were not the first in their ideas, but they were revolutionary computers. {{unsigned ip|112.209.87.11}}

:"pebbles on R&D"? I wish I had pebbles... Apple spends BILLIONS of US dollars every year on R&D ($3.3B in 2012, $4.4B in 2013). Check their Form-K filings with the SEC if you don't believe me. Some other tech companies spend more, but they also have a much larger product line than Apple's so that is to be expected.[[Special:Contributions/108.162.216.100|108.162.216.100]] 14:30, 18 September 2014 (UTC)

This actually looks more like the [https://en.wikipedia.org/wiki/Centennial_Flame Centennial Flame] at the Canadian parliament building. It has the same paneling style at the base, unlike the JFK eternal flame, which, judging by pictures, has a round, flat base. [[Special:Contributions/173.245.55.65|173.245.55.65]] 16:23, 19 December 2015 (UTC)

The title text suggests that if I wait long enough the beachball will change to a flame. I have waited several minutes. How long does one have to wait? /David A [[Special:Contributions/141.101.80.33|141.101.80.33]] 20:44, 23 August 2016 (UTC)
:[[1627|Woosh.]][[Special:Contributions/108.162.216.34|108.162.216.34]] 19:58, 28 November 2019 (UTC)

standard fatal error naming: grab a color (optional), an object and add "of death" to it [[User:An user who has no account yet|An user who has no account yet]] ([[User talk:An user who has no account yet|talk]]) 17:32, 7 September 2023 (UTC)

It's so sad that Steve Jobs died of ligma... [[User:Psychoticpotato|Psychoticpotato]] ([[User talk:Psychoticpotato|talk]]) 03:41, 26 May 2024 (UTC)

859: (

2025-02-12T16:16:51Z

WaddleDeo: I feel as though resolving these tensions is something a wiki such as this should endeavor upon. Perhaps it should be at the end of the explain, though?

{{comic
| number = 859
| date = February 11, 2011
| title = (
| image = (.png
| titletext = Brains aside, I wonder how many poorly-written xkcd.com-parsing scripts will break on this title (or ;;"'<nowiki/>'{<<[' this mouseover text."
}}

== Explanation ==

First, off, all us to resolve those pieces of tension which have been left unresolved by this comic.]>>}))). Okay, with that out of the way, let the explanation begin.

In programming, punctuation is often used to mark sections of code. Paired punctuation marks must always be matched up with a corresponding closing mark, otherwise a so-called {{w|syntax error}} occurs. The programming language {{w|Lisp_(programming_language)|Lisp}} (also featured in [[224: Lisp]] is known for large numbers of nested/paired parentheses. Even in literary works intended only for human consumption, the absence of a matching closing parenthesis as appears in this sentence or other "balanced" punctuation sets creates a mental expectation of eventual closure and completion that remains unfulfilled even long after the unmatched mark is encountered.

There is also a reference to [[312: With Apologies to Robert Frost]] which could contain the missing parentheses.

It can also be interpreted as a {{w|metaphor}}, which compares the reader with a Lisp {{w|Interpreter (Computing)|interpreter}}. The interpreter looks for the parenthesis until the end of the file, where it eventually halts, and prints out the error. The comic claims that if you read an unmatched parenthesis, you will look for it for the rest of the day too.

It also refers to an awkward feeling when you see something out of place in a piece of literary text (like unmatched parentheses, spellying error or a randomly-plac,ed comma..

Also, it may refer to {{w|OCD}}.

Finally, some countries (Russia in particular) use just parentheses instead of text smileys so that <code>:(</code> becomes <code>(</code> and <code>:)</code> turns into <code>)</code>, and it's even somewhat common to stack multiple smiles together in such cases like <code>)))</code>. Hence those readers can magically resist the unresolved tension of the comic but may feel a bit sad instead as a side effect, although the parenthesis is placed in the beginning and not in the end as usual.

The title text refers to the same issue as already highlighted in [[327: Exploits of a Mom]]: if your scripts trust external input, you sometimes will be surprised. At the time of this comic, there were quite a few websites that would grab the xkcd comic three times a week and publish them on their own site. This comic likely broke at least some of the websites because of either the unmatched paren or the extra unmatched markup that is in the title text.

==Transcript==
:[Caption inside an oblong panel:]
:(An unmatched left parenthesis creates an unresolved tension that will stay with you all day.

==Trivia==

* There are other comics with unpaired parentheses (not counting emoticons): [[19]], [[850]], [[1052]], [[1079|1079 (in "Colorado")]], [[1960]] This list is incomplete. Please expand it.
** Comic [[541]] discusses the relationship between emoticons and unpaired parentheses.
** By contrast, [[312]] has an unpaired close parenthesis.
* The well-known "helper website" [http://gChq.github.io/CyberChef/# CyberChef] has a text on its loading page that is a reference to this comic, probably as a joke.
* In Chinese Internet Slang, some people, especially [[:Category:Rhythm_Games|rhythm game]] enthusiasts, may place an unpaired open parenthesis at the end of a sentence to create [https://www.zhihu.com/question/28689654/answer/1038303988 a humorous effect].

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

899: Number Line

2024-12-06T20:03:19Z

WaddleDeo: Copyediting. Also, some added stuff, it's a whole thing.

{{comic
| number = 899
| date = May 16, 2011
| title = Number Line
| image = number line.png
| titletext = The Wikipedia page List of Numbers opens with "This list is incomplete; you can help by expanding it."
}}

== Explanation ==

Once again, [[Randall]] seems to be just messing around, this time with a number line.

*'''Negative numbers''' have the same magnitude as positive numbers but can only be used to represent the removal of that same magnitude (hence the term "difference" being used for subtraction). Negative numbers may be called imitator numbers in the comic because of their similarities to positive numbers.

*'''0.99'''.... is {{w|0.999...|equal to 1}} because if you subtract any number from one, however small, you will get a number that is less than 0.99. 1 − '''0.0000000372''' is 1 bit less than the {{w|IEEE_floating_point|IEEE 754 32-bit floating-point representation}} of 1.

*The '''{{w|golden ratio}}''' or '''ϕ''' (phi) is the number <math>\tfrac{1+\sqrt{5}}{2}</math>, about 1.61803. It has many interesting mathematical properties, mostly relating to geometry, and has occasional appearances in nature, such as spirals formed by the seeds in sunflowers. It is also subject to many less credible claims, such as the belief that phi appears in {{w|Parthenon}} (a well-disputed claim) or that rectangles proportioned after phi are more aesthetically pleasing. The speaker seems to drive off his listeners as soon as he brings it up; the golden ratio is infamous for being brought up by know-it-alls, which Randall has mocked in other comics.

* The approximate range from 2.1 to 2.3 is marked as '''The Forbidden Region'''. Why Randall marked this range as forbidden is really anyone's guess; it seems to be an entirely arbitrary designation.

*'''{{w|e (mathematical constant)|e}}''' (Euler's number) is 2.71828... and '''π''' (pi) is 3.14159265... and…

**'''2.9299372''' is roughly the average of e and π. It being listed as "e and π, observed" is probably a {{w|President's Day}} reference. It is the average of e and π just as the American Presidents' Day is always observed on the 3rd Monday of February (between {{w|George Washington}} and {{w|Abraham Lincoln}}'s birthdays). Washington and Lincoln were the 1st and 16th Presidents of the USA, respectively. Each has a celebrated place in American history.

*'''Gird''', '''ᛟ''' is a purely fictional number. (The glyph that Randall uses seems to resemble an older shape of the digit 4, such as seen on [https://web.archive.org/web/20230908075930/http://www.bl.uk/learning/images/mappinghist/large2296.html archaic maps].). The glyph bears some resamblance to the {{w|odal rune}} but given its associations (especially in the version with {{w|serifs}}) this was probably unintentional. Canon and orthodox could mean "accepted as the official story" and "most science-based followers", but most likely serve as reference to organised religions. Other fictional numbers include: (Which Gird may or (most likely) may not be a reference to)
**[http://strangehorizons.com/fiction/the-secret-number/ Bleem] - a fictional integer between 3 and 4
**iCarly's [http://icarly.wikia.com/wiki/Derf Derf] - a fictional integer between 5 and 6
**George Carlin's [http://www.urbandictionary.com/define.php?term=bleen Bleen] - a fictional integer between 6 and 7
**[https://scp-wiki.wikidot.com/scp-033 SCP-033] - a fictional "missed number" consisting of complex formulae that causes mathematical systems to break down when it is introduced to them (manifesting as the physical destruction of the objects the mathematical formulae are contained in, such as paper and computers)
**Saturday Morning Breakfast Cereal's [http://www.smbc-comics.com/index.php?id=3913 Sorf] - a fictional integer between 2 and 3 (Please note that this SMBC comic postdates this xkcd comic.)

*'''Site of Battle of 4.108''' is another map joke, implying that 4.108 is an actual location, where an eponymous battle was previously fought. 4.108 was also referenced in [[2861: X Value]], though with an added 3 in the ten-thousandths place.

*An '''Unexplored''' region obscures the line approximately ranging all values from 4.5 to 6.7. In the days when the Earth was still being mapped out, territories that had yet to be properly explored and charted were labelled in a similar manner. The placement of the '''Unexplored''' region on the number line indicates that all numbers in that range, including the integers 5 and 6, are completely unknown. This is, of course, patently ridiculous,{{cn}} and the humor seems to derive solely from how nonsensical and unbelievable it is. Correspondingly, the digits 5 and 6 cannot be found in the comic.

*It is often the case in the media that "It has been 7 years..." or "In the last 7 years..." etc. It is made to seem like a believable statistic but cannot always be true. Alternatively, it is intended as an absurd joke that the number 7 is just "not to be believed".

*'''8''' is not the largest even {{w|prime number}}, nor is it a prime at all. The largest (and only) even prime is 2 (which is a subprime number). A joke intended for those who clearly know that the claim is false. (However, it is also possible that the number of numbers in the unexplored region is such that 8 is in fact now prime.)

*The last entry seems to be a reference to certain fields of {{w|pure mathematics}}, which focus less on performing calculations with numbers and more on understanding structures that may be described using logic. It finishes off the tone of the comic that seems to be shaping the number line terms of what is commonly useful to certain areas of applied mathematics, rather than a complete, accurate version of the number line.
**A possible alternate reason for suggesting that any digit beyond 8 (i.e. 9) would not be 'real' mathematics is {{w|Benford's law}}. Taken at the level of individual digits, true data tends to have far fewer 9s in it than (in decimal representation) any other non-zero digit. While it would not be true to say that the presence of a 9 itself indicates invalid values, concocted or stochastically randomized values may have far more 9s than would naturally emerge from true data. Any use of those numbers would then be based upon lies, and highly suspect. The two-digit 10, also illustrated, might be excluded from any analysis of digit-frequency, or (prominently featuring a trailing zero) might further underline the point by being being more likely rounded to the nearest ten (or even a convenient [[2205: Types of Approximation|order of magnitude]]), where its [[2696: Precision vs Accuracy|accuracy and precision]] are both more open to doubt than in the case of either 9 or (also neighbouring it, though not shown here or necessarily subject to any comment) 11.

The title text is a literalism joke; at the time the comic was published, all Wikipedia articles with incomplete lists began with the message template "This list is incomplete; you can help by expanding it." In the case of the {{w|List of numbers}} page, one could infer the absurd notion that Wikipedia wanted to have the list include every number from negative infinity to infinity. But because all Wikipedia articles are necessarily finite, such a list would always be incomplete, no matter how much it was expanded. It may also be referencing his previous statements about Wikipedia being the home of compulsive list-makers, who make the most astonishingly complete lists imaginable.

As of 2022, Wikipedia's {{w|List of numbers}} page, as well as all pages including lists that cannot ever reach a state of completion, are headed by the message template "This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources."

[[2956: Number Line Branch]] also features a number line with additional (fictional) numbers.

== Transcript ==
:[Number line ranging from −1 to 10.]
:[Arrow pointing left, towards negative numbers] Negative "imitator" numbers (do not use)
:[Line right before the number one] 0.99... (actually 0.0000000372 less than 1)
:[Line at the golden ratio.] Φ Parthenon; sunflowers; golden ratio; wait, come back, I have facts!
:[Line at a region between two and 2.2] forbidden region
:[Line at Euler's number.] e
:[Line a bit before 3] 2.9299372 (e and pi, observed)
:[Line at π.] π
:[Line at 3.5 with ᛟ as the numeral] Gird – accepted as canon by orthodox mathematicians
:[Line a bit after 4.] site of battle of 4.108
:[Blob between 4.5 and 6.5 labeled unexplored.]
:[Line at seven.] Number indicating a factoid is made up ("every 7 years...", "science says there are 7...", etc)
:[Line at eight.] Largest even prime
:[Line at 8.75.] If you encounter a number higher than this, you're not doing real math

== Trivia ==

* As for the "Gird" between 3 and 4, one might argue that the arithmetic square root of 11 may have some "integer" properties, because there exists an integer-to-integer{{Actual citation needed}} function f(x) such that f(f(x))=11x. (details needed)
* The "unexplored" area is actually famous for some numbers, such as twice π (also known as tau (τ), approximately 6.283185).

{{comic discussion}}
[[Category:Math]]
[[Category:Wikipedia]]

9: Serenity is coming out tomorrow

2024-11-28T19:45:11Z

WaddleDeo: Date confusion

<noinclude>:''"9", this comic's number, redirects here. For the comic named "Nine", see [[1103: Nine]].''</noinclude>
{{comic
| number = 9
| date = September 30, 2005
| title = Serenity is coming out tomorrow
| before = <big><big>[https://web.archive.org/web/20070927001941/http://xkcd-drawings.livejournal.com/?skip=40#:~:text=8%3A43%20pm-,Firefly,-Drawn%20in%20honor Original title]: '''Firefly'''</big></big>
| image = firefly.jpg
| titletext = Mal, Simon, Wash, Zoe, River, Kaylee, Jayne, Inara, Book. [https://web.archive.org/web/20070927001941/http://xkcd-drawings.livejournal.com/?skip=40#:~:text=8%3A43%20pm-,Firefly,-Drawn%20in%20honor Original caption]: Drawn in honor of the upcoming ''Serenity''! If you work very hard you can figure out who is who.
}}

==Explanation==
This was the tenth comic originally posted to [[LiveJournal]]. The previous one was [[6: Irony]], and the next was [[10: Pi Equals]]. It was among the [[:Category:First day on LiveJournal|first thirteen comics]] posted to LiveJournal within 12 minutes on September 30, 2005, on the first day of the xkcd LiveJournal account.

This comic is about the release of the movie ''{{w|Serenity (2005 film)|Serenity}}'', which was the follow-up to {{w|Joss Whedon}}'s TV show, ''{{w|Firefly (TV series)|Firefly}}'', which was cancelled by {{w|Fox Broadcasting Company|Fox}} after only one season. Plus, three episodes were not shown on Fox but debuted on {{w|Sci Fi Channel}} in the UK. The show was followed by a devoted number of fans who were outraged by the cancellation of the show. High DVD sales and strong fan support allowed the follow-up film ''Serenity'' to be created, which tied up many of the loose ends that ''Firefly'' left open, such as the cause of {{w|List of Firefly characters#River Tam|River}}'s abilities and the origins of the {{w|Reaver (Firefly)|Reavers}}. [[Nathan Fillion]], [[Summer Glau]], and [[Jewel Staite]], the actors who play Mal, River, and Kaylee respectively, also show up later in Randall's series [[:Category:The Race|The Race]]. Randall is presumably excited about the upcoming film, and so has drawn the cast.

The image shows the main characters of Firefly. From left to right:
*{{w|Malcolm Reynolds|Malcolm "Mal" Reynolds}} - the ship's captain.
*{{w|Simon Tam}} - a doctor trying to rescue his sister.
*{{w|Hoban Washburne|Hoban "Wash" Washburne}} - the ship's pilot.
*{{w|Zoe Washburne}} - the ship's second-in-command.
*{{w|River Tam}} - Simon's sister, who displays superhuman capabilities, but is crippled by alliance research.
*{{w|Kaylee Frye}} - the ship's happy-go-lucky mechanic.
*{{w|Jayne Cobb}} - the hired muscle.
*{{w|Inara Serra}} - a companion, the equivalent of a courtesan, but with a greater deal of respect.
*{{w|Derrial Book}} - a shepherd, which is similar to a priest, with a very unknown backstory.

==Transcript==
:[Several stick figures stand side by side in a lineup. A forlorn male in a coat, a male with combed hair, a male with spiky hair and arms outstretched enthusiastically, a female with long hair and cornrows, a shorter female with stringy hair falling over her face, an enthusiastic female with arms raised in celebration with shorter hair, a male with short hair and a goatee and hands on hips, a female with curly hair wearing a dress, and a stern-looking man with flyaway hair.]

==Trivia==
This is the first xkcd comic featuring adorned stick figures (including features like hair and coats) representing distinct characters, a motif that would later become a regular feature throughout the webcomic. This is also the first xkcd comic featuring [[Nathan Fillion]], [[Summer Glau]], and [[Jewel Staite]].

Despite the title stating that the film is coming out tomorrow, the comic was originally released on September 30, 2005, which is also the date of original theatrical release of Serenity.

{{comic discussion}}

[[Category:Posted on LiveJournal| 10]]
[[Category:First day on LiveJournal| 10]]
[[Category:First day on xkcd.com]]
[[Category:Checkered paper]]
[[Category:Firefly]]
[[Category:Comics featuring Nathan Fillion]]
[[Category:Comics featuring Summer Glau]]
[[Category:Comics featuring Jewel Staite]]

1010: Etymology-Man

2024-11-25T20:33:59Z

WaddleDeo: Minor style edits, clarification on Aquaman, the worse version of Submariner. (I stand by this opinion formed in the 1940s)

{{comic
| number = 1010
| date = January 30, 2012
| title = Etymology-Man
| image = etymology_man.png
| titletext = I can't believe I'm saying this, but I wish Aquaman were here instead--HE'D be able to help.
}}

==Explanation==
This became the first comic in a two comic series about the [[:Category:Etymology-Man|Etymology-Man]]. The second followed two comics later in [[1012: Wrong Superhero]].

This comic is a take on the traditional appearance of a super hero when a disaster strikes. In this case, Etymology-Man arrives, who apparently has the power of {{w|Etymology}} — the study of the history of words, their origins, and how their form and meaning have changed over time. As Etymology-Man is explaining the history of the words "{{w|tsunami}}" and "tidal wave", at one point referencing the {{w|2004 Indian Ocean tsunami}} and {{w|2011 Tōhoku tsunami}}, the water starts rising around them. As the waters continue to rise, he continues to only explain the words, rather than attempting to save them as a superhero should. This, intentionally or unintentionally, is a dig at academics who prefer to talk about issues when taking action is more appropriate.

Also, the title text is a play on how useless {{w|Aquaman}} is (perceived to be) compared to other superheroes, as his powers — breathing underwater, speed swimming, and communicating with sea life — are very difficult for writers to make relevant, since most stories do not take place underwater.{{Citation needed}} Indeed, in the case of a flood, Aquaman and his aquatic allies would be able to assist with evacuations. (Do note that, since he does not in fact have control of water itself, he could not stop the wave.)

The irony of the situation comes from the fact that Etymology-Man seemingly has the power of flight and could in fact save Cueball and Ponytail if he was not so busy talking about the origin of the word "tidal wave".

Inexplicable is the fact that Cueball and Ponytail both know exactly who this "superhero" is, and ergo presumably realize that what he is telling them is useless, but they don't even attempt to get to safety. There are few possible explanations for this: perhaps they are simply accepting their fate instead of trying to escape, or even that learning cool word facts takes precendence over saving their own lives, or they have been distracted by Etymology-Man's lecture and were caught by surprise by the fast tidal wave.

==Transcript==
:[Cueball and Ponytail are facing each other, with wavy lines around them to indicate they are experiencing the shaking of an earthquake.]
:Cueball: Earthquake!
:Ponytail: We should get to a higher ground - There could be a tidal wave.

:[A frame-less panel with Cueball and Ponytail, with Cueball taking a pedantic pose and raising a finger.]
:Cueball: You mean a tsunami. "Tidal wave" means a wave caused by tides.

:[A crash is heard, followed by Etymology-Man flying in while wearing a cape.]
:Etymology-man: You know, that doesn't add up.
:Cueball and Ponytail: Etymology-man!

:[Etymology-man takes a pedantic pose.]
:Etymology-man: What ''does'' "tidal wave" mean? There are waves caused by tides, but they're "tidal bores", and they're not cataclysmic.
:It can refer to the daily tide cycle, but that's obviously not what people mean when they say "a tidal wave hit".
:It's been obvious for centuries that these waves come from quakes. So why "tidal"?

:[Panel zooms in on Etymology-man.]
:Etymology-man: Remember that until 2004, there weren't any clear photos or videos of tsunamis. Some modern writers even described them rearing up and breaking like surfing waves [sic]
:Of course, in 2004 and 2011, it was made clear to everyone that a tsunami is more like a rapid, turbulent, inrushing tide - exactly what historical accounts describe.

:[Water begins to rush in. Etymology-man keeps his pedantic pose.]
:Etymology-man: Maybe those writing about Lisbon in 1755 used "tidal wave" not out of scientific confusion, but because it described the wave's form — a description lost in our rush to expunge "tidal wave" from English.

:[The water is now waist-deep. Etymology-man continues to drone on, but the others start to panic.]
:Etymology-man: "Tsunami" is now the standard, and I'm not trying to change that. But let's be a tad less giddy about correcting "tidal wave" - especially when "tsunami" just means "harbor wave", which is hardly...

{{comic discussion}}

[[Category:Etymology-Man]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Earthquakes]]
[[Category:Language]]
[[Category:Pedantic]]

3015: D&D Combinatorics

2024-11-25T20:30:13Z

WaddleDeo: Something… something… acknowledge title change, don't know if this is good… something… something.

{{comic
| number = 3015
| date = November 22, 2024
| title = D&D Combinatorics
| image = dnd_combinatorics_2x.png
| imagesize = 328x446px
| noexpand = true
| titletext = Look, you can't complain about this after giving us so many scenarios involving N locked chests and M unlabeled keys.
}}

==Explanation==
{{incomplete|Created by a HTML SHORTENING CODE TYPO - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

{{w|Dungeons and Dragons}} (D&D) is a {{w|tabletop role-playing game}} that usually has a "Dungeon Master" (narrator) that takes a team of players through scenarios where they attack monsters and go on quests.

Often, there will be semi-random events: e.g., when attacking a monster, often a player will roll a die and deal damage based on the result. D&D uses a variety of dice, from regular d6 (6-sided, cubic dice) to other {{w|Dice#Common_variations|polyhedral dice}}, with the number of faces denoted by dX (e.g., d10 is a 10-sided die, with numbers from 1 to 10 on it). Common sets include: d4, d6, d8, d10, d12, d20, and occasionally d100 (typically not, however, the [[2626:_d65536|d65536]]).{{cn}}

With these, you can simulate events with a wide variety of denominators. In this case, Cueball gives a {{w|combinatorics|combinatorial}} problem:

* There are 10 arrows.
* 5 arrows are cursed.
* You randomly take two.
* What are the odds that neither of them are cursed?

Calculating using {{w|binomial coefficients}}, there are "10 choose 2" (45) ways to choose two arrows, of which there are "5 choose 2" (10) ways to choose 2 arrows that are non-cursed. As a result, the odds of taking all non-cursed arrows is 10/45, which simplifies to 2/9.

To see this in a different way, the probability of choosing one non-cursed arrow is 5/10, which then must be multiplied by the probability of choosing the second non-cursed arrow, which is now 4/9, giving 20/90 or 2/9, the same result as before.

The Dungeon Master (DM) in this case [[356: Nerd Sniping|has to]] map that probability into rolling multiple dice, whose sums are also not evenly distributed: i.e. if rolling 3d6 (3 six-sided dice) and a d4 (1 four-sided die), the sums can range from 4 to 22. It's pretty hard to do this in one's head, but it does happen that the odds of rolling 16 or more with this combination is 2/9, matching the probability that we want to simulate. Here's a table of all the 6*6*6*4=864 possible outcomes -

{| class="wikitable"
|+ All possible combinations of rolls for 3d6 + 1d4
|-
!Total!!4!!5!!6!!7!!8!!9!!10!!11!!12!!13!!14!!15!!16!!17!!18!!19!!20!!21!!22
|-
|Ways to roll it||1||4||10||20||34||52||71||88||100||104||100||88
| style="background:#ffffcc;" | ''' ''71'' '''
| style="background:#ffffcc;" | ''' ''52'' '''
| style="background:#ffffcc;" | ''' ''34'' '''
| style="background:#ffffcc;" | ''' ''20'' '''
| style="background:#ffffcc;" | ''' ''10'' '''
| style="background:#ffffcc;" | ''' ''4'' '''
| style="background:#ffffcc;" | ''' ''1'' '''
|}

71+52+34+20+10+4+1 = 192

192/864 = 2/9, which matches the desired probability from earlier. The table of outcomes can either be bruteforced with a program, or can be derived using generating functions.

The caption elaborates that the DM has a degree in the relevant field, and is unable to resist applying this to the D&D game when the opportunity arises - opportunities that Cueball eagerly provides for this very reason.

There are several much easier ways of implementing this operation, without coming up with a more complex solution:
#Do not even attempt to abstract the chances with dice-rolls. Literally present 10 similar-looking arrows, or other objects that are taken to represent arrows (face-down playing cards, for example), where the assigned information of whether each one is cursed initially hidden away from Cueball, and then just let Cueball pick any two.
#Even just with D&D dice, the DM could ask Cueball to roll a 1d10 for the first arrow, and then again for the second, re-rolling the second so long as Cueball gets the same number as before (which emulates the same sort of process, but with a non-zero chance of having to make and reject an arbitrary number of extra dice-rolls). One could specify that 1-5 represents the cursed arrows and 6-10 represents the non-cursed arrows, following the convention that lower rolls are bad in D&D.
#Similarly, the player could be asked to roll a d20, with a score of 15 or 16 requiring a re-roll and 17–20 being successful choices. This would give a 4/18 chance, i.e., 2/9 for a successful roll on the first (and any subsequent) rolls. As with option 2, there would be a 1/10 chance of having to make and reject at least one extra dice-roll.
#If understanding the actual odds, but wishing to keep the dice in use simple, a 2/9 probability can also be found by saying Cueball would succeed when 2D6 produces a 9, 10, or 12 (4/36, 3/36, and 1/36 probability, respectively, giving 8/36, i.e., 2/9).
#Another method would be to roll 1d6 twice, using the first as a base number and the second as a control die where 1-2 = +0, 3-4 = +6 and 5-6 = +12 for a linear spread of 1-18. In this case a roll of 3, 4, 5, or 6 on the first roll coupled with a 5 or 6 on the second roll would indicate the top four of the eighteen possibilities, 4/18, or 2/9.
#Alternatively, approximate the odds by using a d100 (or equivalent roll of two D10s) and seeking an 78 or higher (i.e. the range of 78-99, assuming this roll can produce a zero/double-zero roll, instead of a 'natural 100' for which the range would have to start at 79), which gives a 22% chance, which may be sufficiently acceptable as it is substantially similar to 2/9's effective odds of 22.222%.
The first two options also instantly reveal cases of whether ''two'' cursed arrows are nominally chosen (an outcome that is at identical odds to the opposite possibility of neither being so), should this be useful roleplaying information in addition to the basic fact of ''failing'' to avoid at least one of them. The fourth option could also be used to suggest this if (for example) the complementary results of 2, 4 or 5 are rolled, and the final one in the event that the 'percentage' given is 0-21 (or 1-22).

One could argue that the above solutions do not have the "polished" D&D feel of rolling a certain number of dice, adding them up, and seeing if the result is greater than or equal to an entirely correct required total. This is a commonly used mechanic for difficulty checks, hit calculations, and other such chance-based events in D&D. The DM may feel that this dice format is a requirement, but this approach is far too clunky for most DMs to be practical. It may be inferred that as the DM's mind tends towards more combinatorial solutions, she is either unable or unwilling to consider more straightforward and less time-consuming solutions to this cursed arrow problem.

The title text claims that Randall only started doing this to the DM after she herself insisted on forcing another combinatorial puzzle on the players several times, involving a bunch of locked treasure chests and a multitude of keys to unlock them with. This might be a reference to an M-of-N encryption system, where a system has ''n'' valid passwords (instead of just one) but requires ''m'' of those passwords to be given before it will open; it is assumed m is greater than 1 but less than n. While this is easy enough to implement in a computer system, it would be extremely cumbersome to build for a physical lock with keys, and spreading the mechanism across multiple separate treasure chests would be impossible without literal magic (luckily, magic is in plentiful supply in a typical Dungeons and Dragons game).{{cn}}

==Transcript==
:[Cueball, Megan, Ponytail, White Hat, and Knit Cap are sitting around a table on office chairs. The first and last at either end and the other on the same side facing outwards. Everyone is looking at Cueball who is holding a finger up in front of him while speaking. Ponytail is facepalming while replying. The table is covered in sheets of paper and assorted dice.]
:Cueball: I grab 2 of the 10 arrows without looking and fire them, hoping I didn't grab one of the 5 cursed ones. Did I?
:Ponytail: Sigh. Umm. Okay.
:Ponytail: Roll... Uh... Hang on...
:Ponytail: Roll 3d6 and a d4. You need... 16 or better to avoid the cursed arrows.

:[Caption below the panel:]
:I got '''''way''''' more annoying to play D&D with once I learned that our DM has a combinatorics degree and can't resist puzzles.

==Trivia==
When this comic was originally released, due to seeming error on Randall's end, the official title of the page was "xkcd: D[sic] Combinatorics", instead of "xkcd: D&D Combinatorics". The reason for this is currently unknown, and as of this writing has not been fixed.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Knit Cap]]
[[Category:Games]]
[[Category:Math]]

950: Mystery Solved

2024-11-19T19:40:40Z

WaddleDeo: Well you see, James quit.

{{comic
| number = 950
| date = September 12, 2011
| title = Mystery Solved
| image = mystery_solved.png
| titletext = The Roanoke Lost Colonists founded Roanoke, the Franklin Expedition reached the Pacific in 2009 when the Northwest Passage opened, and Jimmy Hoffa currently heads the Teamsters Union--he just started going by 'James'.
}}

==Explanation==
In this comic, aviation pioneer {{w|Amelia Earhart|Amelia Earhart's}} plane comes back to land after it went missing in 1937. It was presumed that Earhart was dead and that her plane went down into the ocean at some point during her journey, although various alternate theories have arisen since then, with no clear answer to the mystery. However, this comic proposes a much simpler explanation: there was no disappearance, it just took her 74 years to fly around the Earth. This explanation is simple, but impossible.

Earhart seems to think the person she is talking with is stupid for not comprehending such a simple answer, but in fact her explanation raises a multitude of other questions. Among them:
* How did it take so long for her to land? (She answers that the world is big, but it isn't so big that it takes 74 years to fly around it, even with 1937 technology. Earhart had already completed the majority of her journey before disappearing, and had "only" to cross the Pacific Ocean -- with stops in Howland Island and Hawaii -- before returning to her point of origin in Oakland, California. Had her flight succeeded, she could have completed it within three days of when she was last seen.)
* How did she survive that long, apparently without aging?
* Why didn't her plane fall apart (as even one year of continuous flight would have induced considerable depreciation (wear and tear) on many of the plane's mechanical components, and Amelia Earhart could not have repaired the plane while flying it){{Citation needed}} or run out of fuel?
* Why didn't anyone else see her on her journey or at least detect her with radar?
* Why doesn't she know that a flight shouldn't take 74 years?

Another possibility is that she did not just fly around the earth, but flew very fast (near {{w|light speed}}) for 74 non-subjective years to return {{w|Twin paradox|without having aged much}}. However, this would not explain why she thinks it is a long trip around the earth, and it raises the additional questions of how she would accomplish this feat in a {{w|Lockheed Model 10 Electra|twin-engine monoplane}} and how no one else noticed any signs of her plane traveling near light speed, such as a 74-year-long sonic boom.

Earhart's disappearance gave birth to many conspiracy theories. One of these, which was explored in the TV series [http://memory-alpha.wikia.com/wiki/Star_Trek:_Voyager Star Trek: Voyager], involves [http://memory-alpha.wikia.com/wiki/The_37%27s_(episode) her being abducted] to another [http://memory-alpha.wikia.com/wiki/Delta_Quadrant part of the galaxy], where she was left in cryogenic stasis until found by the Voyager crew. Something similar could be the case here, having Earhart frozen by aliens until 2011.

The title text lists a few more deceptively mundane answers to long-unsolved mysteries that at first seem to dispel the questions with boring logic, but in fact raise more questions than they answer. The first is the lost colonists of {{w|Roanoke Colony|Roanoke}}, who were one of the first groups to come to North America, but then suddenly disappeared, leaving their colony untouched. The comic suggests that they simply left to found {{w|Roanoke, Virginia}}. Like all the other explanations in this comic, this doesn't explain how this simple solution became lost to public knowledge. It also doesn't explain why they abandoned their original colony, or how they made it to Roanoke, Virginia, which is more than 300 miles away, or where they were between when their colony was found abandoned in 1590 and when the future Roanoke, Virginia, was established over 200 years later, in the nineteenth century.

The second mystery in the title text, the {{w|Franklin's lost expedition|Franklin Expedition}}, was a British voyage in 1845 to study the {{w|Northwest Passage}} that also disappeared, somewhere in northern Canada. The text suggests that the expedition wasn't lost; it was still exploring and eventually found its way to the Pacific Ocean in 2009. This is impossible, because the men on the expedition would be long dead. As a side note, both of the Franklin Expedition ships were eventually found wrecked in the years after this comic was published: [http://www.cbc.ca/news/politics/franklin-expedition-ship-pieces-believed-discovered-in-arctic-1.2759925 one in 2014], and [https://www.theguardian.com/world/2016/sep/12/hms-terror-wreck-found-arctic-nearly-170-years-northwest-passage-attempt the other in 2016].

The final mystery is {{w|Jimmy Hoffa}}, the famous {{w|International Brotherhood of Teamsters|Teamsters Union}} leader who went missing in 1975 and declared dead in 1982 (possibly murdered). The comic says Jimmy simply opted to switch to the more formal version of his name; again, this raises the question of how such a thing would be possible without anyone noticing. From 1998-2022, so at the time of this comic's publication, the head of the Teamsters was in fact named {{w|James P. Hoffa|James Hoffa}} (he is Jimmy Hoffa's son and goes by "James P. Hoffa" professionally); the comic could be implying that the senior Hoffa is not only alive but actually impersonating his own son, which would raise the question of why the supposed "son" doesn't look suspiciously older than he claims to be.

==Transcript==
:[A twin prop airplane flies high overhead.]
:Off-screen person: What's that airplane?

:[The plane has landed (shown in gray in the background), and the pilot, wearing an aviator hat and goggles, is walking towards the crowd waving.]
:Off-screen person: Holy crap— Is that Amelia Earhart?

:[A close up of Amelia Earhart waving.]
:Amelia: Hey everyone! My flight was a success!
:Off-screen person: But... Where were you!?

:[A wide view of Amelia, she stops waving.]
:Amelia: I flew around the world!
:Off-screen person: But you disappeared in 1937!

:[A close up of Amelia Earhart.]
:Amelia: Right, to fly around the world.
:Off-screen person: It's 2011!
:Amelia: The world is big. It's a long flight.

:[A wide view of Amelia]
:Off-screen person:
::But you...
::It's not...
::I -
:Amelia: Can I talk to someone smarter?

==Trivia==
This is the first xkcd comic featuring [[Amelia Earhart]].

{{comic discussion}}

[[Category:Comics featuring Amelia Earhart]]
[[Category:Aviation]]

3006: Demons

2024-11-01T16:10:14Z

WaddleDeo: Is that how you make new lines? (Fixed the transcript.)

{{comic
| number = 3006
| date = November 1, 2024
| title = Demons
| image = demons_2x.png
| imagesize = 285x458px
| noexpand = true
| titletext = Though they do appreciate how much he improved the heating system for the flame pit.
}}

==Explanation==
{{incomplete|Created by a DOOR THAT GOES LESS WAYS THAN MOST, WHICH WAS IN TURN MADE BY A DEMON - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
[Three demons standing in hell, surrounded by fire]
:Leftmost demon: What's our plan for the souls today? Boil them in oil?
:Middle demon: We could cast them into the flame pit.
:Rightmost demon: What if we set up two rooms with a door in between, but– get this– we only let them go through it one way!

:Caption: Maxwell's Demon had trouble fitting in with the others.
{{comic discussion}}

3006: Demons

2024-11-01T16:08:05Z

WaddleDeo: Added transcript.

{{comic
| number = 3006
| date = November 1, 2024
| title = Demons
| image = demons_2x.png
| imagesize = 285x458px
| noexpand = true
| titletext = Though they do appreciate how much he improved the heating system for the flame pit.
}}

==Explanation==
{{incomplete|Created by a DEMON - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
[Three demons standing in hell, surrounded by fire]
Leftmost demon: What's our plan for the souls today? Boil them in oil?
Middle demon: We could cast them into the flame pit.
Rightmost demon: What if we set up two rooms with a door in between, but– get this– we only let them go through it one way!
Caption: Maxwell's Demon had trouble fitting in with the others.
{{comic discussion}}

551: Etch-a-Sketch

2024-04-17T13:52:55Z

WaddleDeo:

{{comic
| number = 551
| date = March 4, 2009
| title = Etch-a-Sketch
| image = etch-a-sketch.png
| titletext = Surrounded by boring mysteries.
}}

==Explanation==
[[Cueball]] notices that if you draw a lot on an {{w|Etch_A_Sketch|Etch-a-Sketch}}, the aluminum powder in it can be cleared from enough of the screen to allow a view of the interior (as seen [http://upload.wikimedia.org/wikipedia/commons/7/78/EtchASketch_Inside_Shown.jpg here]).

Cueball then proceeds to clear a window into the device, which shows him that there's a girl, [[Megan]], inside whose job is to act as the stylus for the Etch-a-Sketch. She suggest that they be friends, and little hearts pop up.

As the dream fades, it then becomes clear that this is just a fantasy, and Cueball sighs at the rather more mundane reality that the lines get drawn by a stylus moving on a simple arrangement of rods. The comic ends with Cueball shaking the Etch-a-Sketch, likely in anger at the reality of it, which resets it and will re-conceal the mechanism.

The title text notes that sometimes the mysteries surrounding us turn out to be much more boring than we dream they are.

==Transcript==
:[Cueball is sitting on a bench playing with a pink Etch-a-Sketch.]
:Cueball: Hey. If I draw enough lines, I can see what's behind the screen.

:[Close up on the Etch-a-Sketch's screen.]
:Cueball (off-screen): Oh man, almost...

:[Cueball looks at the Etch-a-Sketch.]
:Etch-a-Sketch: Hi!

:[Head of Megan appears in the black hole Cueball has drawn on the Etch-a-Sketch screen.]
:Megan: You're cute!

:[Cueball is looking closer on the Etch-a-Sketch screen.]
:Cueball: Wha—
:Megan (out of the Etch-a-Sketch): I'm the one who draws when you turn the knobs.
:Megan (out of the Etch-a-Sketch): It's lonely in here.

:[Cueball holds the Etch-a-Sketch further away from his head.]
:Cueball: It's lonely out here too.
:Megan (out of the Etch-a-Sketch): I'm glad you found me, then!

:[Cueball holds the Etch-a-Sketch very close to his face. Panels start to break away into thought bubbles.]
:Megan (out of the Etch-a-Sketch): Let's be friends
:Megan (out of the Etch-a-Sketch): And never be alone again.

:[The next panel is almost gone in the thought bubbles. In the remaining top left corner there are three pink hearts, the top one of these looks like it was drawn on an Etch-a-Sketch.]

:[From the last two panels the above turns out to have been a fantasy of Cueball. There is a rather large break between the first three lines of panels to the last line. Between the previous line of panels (from the middle panel ) to the last line, there are three large circles, which then continues with seven more inside the next panel down to Cueball sitting with the etch-a-sketch.]
:Cueball: *Sigh*

:[Close up of the Etch-a-sketch where the black hole Cueball has drawn shows what is really behind the glass; just the mechanics of the machine, with a pin that moves on a cross and removes the sand from the screen.]

:[Zoom back out to Cueball who shakes the Etch-a-Sketch above his head.]

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Romance]]
[[Category:Social interactions]]

1541: Voice

2024-01-02T22:21:49Z

WaddleDeo: /* Six years ago */

{{comic
| number = 1541
| date = June 22, 2015
| title = Voice
| image = voice.png
| titletext = Anyway, we should totally go watch a video story or put some food in our normal mouths!
}}

==Explanation==
During a casual talk with [[Megan]], [[Ponytail]] suddenly interrupts her normal speech stating that she is for some reason only capable of controlling her own voice once every six years. Apparently only for a very brief time since she immediately returns to the casual talk, continuing her previous sentence mid-word before being able to tell Megan how she could help her. Upon Megan's confused request, she denies knowledge of the occurrence, although in a somewhat suspicious way, using possibly fake laughter.

It could be this was just a prank by Ponytail, to tease Megan, but given her fake laughter reply to Megan's inquiry and the continuing comment in the title text it seems most likely that Ponytail is indeed possessed by some sort of entity that prevents her from expressing her own thoughts, except for a very short time every six years. Of course this may just be her way of continuing with the prank; see a previous case of such a prank [[#Voice hijacking|below]].

In case it is not a prank it would thus appear that Ponytail's usual "self" is indeed this possessing entity. Whether this entity is actually aware that the "real" Ponytail did speak, or if it actually does not know that it was interrupted (since it continued mid-word) is not clear from the last response to Megan.

The title text suggests that Ponytail {{tvtropes|BodySnatcher|is possessed by some sort of inhuman entity}} (most likely an alien or {{w|AI}}, or possibly a [[1530: Keyboard Mash|small but intelligent creature]] living in her head) unfamiliar with movies and eating. See below for [[#Related comics|related comics]].

===Related comics===
====Non-human entity trying to behave like a human====
The comic, [[1530: Keyboard Mash]], also revolves around the same theme of a non-human entity trying to convince other humans that it is in fact a human. This is most clearly referenced in the title text of this comic. In Keyboard Mash, it is a spider that tries to chat like it was a human, making statements that are true if you are human, but which humans would never utter in a conversation like here - ''put some food in our normal mouths!'' However, the pretended 'human' being (the spider) is not seen by the other person in this comic. As opposed to this one where Megan speaks directly with Ponytail.

====Voice hijacking====
It has already been established recently, in [[1528: Vodka]], that Ponytail's voice can be hijacked by non-human entities. That time it was the vodka she was drinking that took over. It is possible that this is continuing or caused by the same openness to possession as shown here. It is also possible that she simply thinks possession jokes are funny and once again jokes with Megan.

====Six years ago====
Six years to the day before this one, which according to this comic was the last time Ponytail had control of her own voice, this comic [[600: Android Boyfriend]] was posted. Ponytail acquired an android boyfriend. It seems unlikely that this older comic has any relation with this particular episode - except that this comic mentions a six-year period and Ponytail is also in that comic.

====Note on Ponytail====
''Ponytail is mainly a filler character, showing up when two females are needed or when a large group of people are present.''

It is important to note that [[Ponytail]], like most xkcd [[stick figure|stick figures]], usually does not represent the same character in each comic. This Ponytail is likely unrelated to other instances of Ponytail.

==Transcript==
:[Megan and Ponytail are walking.]
:Megan: Are you doing anything later?
:Ponytail: I was th- ''I can only control my voice once every six years. Please, you have to'' -inking of going out, but no real plans.
:Megan: ...What was that?
:Ponytail: Haha, what?

==Trivia==
*{{w|Demonic possession|Possession}} stories are common in films and books. Some recent examples that could have inspired this comic could be one of these (beware of '''spoilers'''):
**In the film {{w|The Host (2013 film)|The Host}} the human race has been taken over by small parasitic aliens called "Souls" that inserts themselves individually into a host body where they are then able to access the host's memories. In the story the main character is the host that controls a body, and then the personality of that body, which is then no longer able to control her body, but can speak to the host. And in a few situations can take over her body for a short period. Very similar to what happens in this comic.
**The Yeerks from the ''Animorphs'' {{w|Animorphs|books}} and {{w|Animorphs (TV series)|TV series}} take humans as a host by entering and merging with their brain through the ear canal. The host can fight to temporarily take back control, but this is very painful. However how many times human can fight back is not as specific as in this comic. Animorphs is referenced in a [[:Category:Animorphs|a few other comics]].
**In the movie {{w|Being John Malkovich}} the main character possesses Malkovich, but Malkovich is occasionally able to communicate through the possession.
**In {{w|Warlord (Star Trek: Voyager)|an episode}} of {{w|Star Trek: Voyager}}, Kes is taken over by a warlord who has discovered a means of immortality by using technology to transfer his consciousness to another body. The warlord enters a mental struggle with Kes's latent mind, and as he begins to lose the battle, Kes's personality resurfaces on several occasions.

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

2870: Love Songs

2023-12-21T17:27:52Z

WaddleDeo:

{{comic
| number = 2870
| date = December 20, 2023
| title = Love Songs
| image = love_songs_2x.png
| imagesize = 373x341px
| noexpand = true
| titletext = The Piña Colada song carves a trajectory across the chart over the course of the song.
}}

==Explanation==
{{incomplete|Created by a LOVE SONG WHERE BOTH SIDES HATE EACH OTHER (AND THEMSELVES) - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

The comic shows an xy-chart of various love songs, graphed according to how the subjects of the song feel. The x-axis represents the narrator/singer's feelings for whomever they are singing to or about, from "No!!" to "Yes!!", while the y-axis represents the other person's feelings for the one singing the song.

The songs are all in this [https://open.spotify.com/playlist/0R1FWH3Hq4Ur08HSNSFtyf?si=WMD6u3QuThW7f2GXBTTJQA&pi=e-wEOR4pNmQ2Sp Spotify playlist].

{|class = "wikitable"
! Song !! Artist(s) !! Explanation !! Do I like you? !! Do you like me?
|-
| {{w|No Scrubs}} || {{w|TLC (group)|TLC}} || The narrator is the target of another person's affections but considers that person completely undesirable as a romantic partner. || No!! || Yes!!
|-
| {{w|That Don't Impress Me Much}} || {{w|Shania Twain}} || The song says the person singing doesn't find certain things impressive in a potential partner, and having nice things alone won't make them like that person. It shows the singer cares about being independent and wants someone special. This song was referenced in [[984: Space Launch System]]. || Unclear/Neutral || Yes!
|-
| {{w|Cry Me a River (song)|Cry Me a River}} || {{w|Justin Timberlake}} or {{w|Cry Me a River (Arthur Hamilton song)|Knight/Cocker/Wilson/Welch/Bublé}} || The lyrics describe a relationship that has ended, and the singer expresses a sense of betrayal and heartbreak. The title phrase "Cry me a river" is a metaphorical way of telling the other person to go ahead and cry as much as they want because the singer has moved on and is no longer affected by the breakup. || No! || Yes!
|-
| {{w|We Are Never Ever Getting Back Together}} || {{w|Taylor Swift}} || At the start of the song, the narrator has spent a prolonged time in an on-and-off relationship with someone, repeatedly getting close to them before they distance themselves. As the song progresses, the narrator expresses their frustration with their partner and makes it clear that this time, ''they'' are the one leaving, and they're ''never'' coming back, no matter what their now-former lover says or does. || No!! || Yes?
|-
| {{w|You're So Vain}} || {{w|Carly Simon}} || The song talks about someone who is very self-centered and vain, with the lyrics describing various instances of their narcissistic behavior. The narrator expresses frustration with this person's attitude, but there's a sense of mystery about their identity. This song has been [[1501: Mysteries|mentioned before]] in xkcd. || No! || Unclear/Neutral
|-
| {{w|I Will Survive}} || {{w|Gloria Gaynor}} || The narrator's partner left her to hurt her emotionally, only for her to eventually realize the abusive nature of their relationship and decide she doesn't need him anymore. As he tries to come back to her, she refuses to take him back and tells him to leave. || No! || No!
|-
| {{w|Somebody That I Used to Know}} || {{w|Gotye}} feat. {{w|Kimbra}}  || The narrator's relationship with his partner has ended, but he is upset that his former partner has since then broken off all contact with him. The third verse is from the former partner's point of view, and she claims she ended the relationship because he was emotionally abusive, instead of the narrator's claim in the second verse that they simply drifted apart. || Unclear/Neutral || No!
|-
| {{w|You Oughta Know}} || {{w|Alanis Morissette}}  || The song describes the intense emotions and pain experienced after a breakup, expressing feelings of betrayal, anger, and confusion toward the former partner. The powerful delivery and memorable chorus contribute to its reputation as a compelling anthem of heartbreak and resentment. || No!! || No!!
|-
| {{w|Thank U, Next (song)|Thank U, Next}} || {{w|Ariana Grande}}  || The song reflects on past relationships, expressing gratitude for the lessons learned from each one and emphasizing personal growth. The lyrics convey a positive and forward-looking attitude, acknowledging the importance of self-love and moving on from the past. || Unclear/Neutral || Unclear/Neutral
|-
| {{w|Teenage Dream (Katy Perry song)|Teenage Dream}} || {{w|Katy Perry}} (or {{w|Teenage Dream (T. Rex song)|T. Rex}} or {{w|Teenage Dream|others}}) || Celebrating self-empowerment and confidence, the song encourages embracing one's individuality and standing tall, like a T-Rex. The lyrics convey a lively and spirited message, promoting self-love and expressing strength in uniqueness. || Yes!! || Yes!!
|-
| {{w|Shape of You}} || {{w|Ed Sheeran}} (or {{w|Shape of You (Reshaped)|Beverly Knight}}) || This song is about being in love physically, and to a lesser extent, emotionally, to another person. The verses indicate that the love is reciprocated.|| Yes!! || Yes!!
|-
| {{w|I Will Always Love You}} || {{w|Dolly Parton}}, cover: {{w|Whitney Houston}} || Expressing deep love and gratitude, the lyrics convey a heartfelt farewell while emphasizing the enduring commitment to cherish memories and maintain love despite the separation. The song reflects on the bittersweet emotions of saying goodbye with a sense of everlasting affection. || Unclear/Neutral || Yes
|-
| {{w|Call Me Maybe}} || {{w|Carly Rae Jepsen}} || The lyrics describe a hopeful and lighthearted encounter where the narrator gives their number to someone they find attractive, expressing the excitement and anticipation of a potential connection. This song/Carly in general has been mentioned [[2379: Probability Comparisons|so]] [[2198: Throw|many]] [[Challengers|times]] in xkcd. || Yes! || Unclear/Neutral
|-
| {{w|Killing Me Softly with His Song|Killing Me Softly}} || {{w|Lori Lieberman}}, cover: {{w|Roberta Flack}}, {{w|The Fugees}} || Capturing a powerful connection, the singer recounts the experience of hearing a song that seems to reflect their own life story, eliciting strong emotions. The narrative unfolds with a sense of vulnerability as the music resonates deeply, touching the listener's emotions and leaving a lasting impact. || Yes!! || Unclear/Neutral
|-
| {{w|Girlfriend (Avril Lavigne song)|Girlfriend}} || {{w|Avril Lavigne}} (or {{w|Girlfriend (disambiguation)|many others}})  || The narrator is in love with a boy who already has a girlfriend, and spends the song trying to convince him to dump her so she herself can go out with him. || Yes || Unclear/Neutral
|-
| {{w|You've Lost That Lovin' Feelin'}} || {{w|The Righteous Brothers}} || The song expresses the pain and sorrow of a fading romantic connection, capturing the emotional toll of lost love and the desire to rekindle the passion that once defined the relationship. The lyrics convey a heartfelt yearning for the return of the deep affection that has diminished over time. This song was featured in [[317: That Lovin' Feelin']]. || Unclear/Neutral || No?
|-
| {{w|You Belong with Me}} || {{w|Taylor Swift}} || The narrator has a crush on someone already in a relationship (implied throughout the song to be a toxic one), and lists various reasons why they would make a better partner. It's also worth noting that in the [https://m.youtube.com/watch?v=VuNIsY6JdUw& music video], the narrator's crush is actually on decent terms with them, rather than flat-out disliking them as the chart suggests.|| Yes || No!
|-
| {{w|Creep (Radiohead song)|Creep}} || {{w|Radiohead}} || Expressing feelings of inadequacy and unrequited love, the song conveys the narrator's sense of not belonging and yearning for someone who appears out of reach. The lyrics capture the emotional struggle of grappling with self-worth and longing for a connection that seems elusive. || Yes!! || No!!
|-
| {{w|Escape (The Piña Colada Song)|The Piña Colada Song}} (title text) || {{w|Rupert Holmes}} || The narrator is stuck in an unfulfilling relationship and notices out a personal advertisement looking for a new partner. He mentions that he likes Piña Coladas (And getting caught in the rain). He responds to the ad and goes on the date, only to find out that the woman who placed the ad is his wife. They seemingly recognize that their relationship isn't as bad as they thought, resulting in a trajectory from the lower left to the middle or upper right. || varies || varies
|}

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

:[Y-axis label:]
:Do you like me?

:[X-axis label:]
:Do I like you?

:[X- and Y-axis values (from bottom left):]
:''NO!!''; No; Unclear or Neutral; Yes; ''YES!!''

:[Top left quarter:]
:No Scrubs
:That Don't Impress Me Much
:Cry Me a River
:We Are Never Ever Ever Getting Back Together

:[Middle left:]
:You're So Vain

:[Bottom left quarter:]
:I Will Survive
:Somebody That I Used to Know
:You Oughta Know

:[Center:]
:Thank U, Next

:[Top right quarter:]
:Teenage Dream
:Shape of You
:I Will Always Love You
:Call Me Maybe

:[Middle right:]
:Killing Me Softly

:[Bottom right quarter:]
:Girlfriend
:You've Lost That Lovin' Feelin'
:You Belong with Me
:Creep

{{comic discussion}}

[[Category:Charts]]
[[Category:Songs]]
[[Category:Romance]]

2734: Electron Color

2023-11-14T19:07:51Z

WaddleDeo: /* Explanation */

{{comic
| number = 2734
| date = February 6, 2023
| title = Electron Color
| image = electron_color_2x.png
| imagesize = 568x256px
| noexpand = true
| titletext = There's quark color, but that's not really color--it's just an admission by 20th century physicists that numbers are boring.
}}

==Explanation==
In this comic [[Miss Lenhart]] is teaching a school physics class. One of her students asks what the color of electrons is.

This is a relevant question for a kid to ask since on many scientific diagrams of atoms, the subatomic particles have been assigned colors to identify them for the reader. Neutrons are generally red, green, or gray; protons red or green and electrons might be blue or yellow. But there is no accepted rule for coloring such diagrams, so the kid may be confused. Additionally, some scientific diagrams use color coding rather than actually representative colors, and the kid may be wondering what color particles actually are.

In completely off-character style, Miss Lenhart actually gives a correct fact ''...so "color" isn't even defined for them.'' and states that, unlike the diagrams, which are colored for convenience, the particles are not colored. She however gives a bogus, pseudoscientific explanation: ''They're too small to interact with visible light, ...'' In fact, every optical effect in our world is due to electrons interacting with light. That leads to color because the electrons are usually bound to various atomic nuclei in molecules etc., which leads to differences in how they take up and give out various energies of photon. But the electron itself does not have a particular hue that can be shone upon and absorbed/reflected, it merely governs the possible quanta of energy changes involved in generating the broad spectrum of light that the substance formed of the atom(s) may be seen by. Also protons are far "bigger" than electrons (and would interact strongly!), but their interaction with light (and generally electromagnetic radiation) is rarely observable, because they are shielded by the tiny electrons in ordinary matter. So, whether intended or not, Miss Lenhart is in her usual role of talking bullshit, also see for instance [[1519: Venus]].

She then continues by saying that electrons are definitely yellow. The reason for this isn't clear. She may be:
* meaning that they should be yellow on diagrams, because she feels this is the correct way to depict them in drawings of atoms,
* referring to the Greek etymology of the word electron ({{w|elektron (resin)|elektron}} is an old name for amber, a yellow gem),
* merely teasing her young pupils, or
* stating how she feels they would be, if they could possess color.

But her off-panel pupils take her word for it. One of the kids says "I knew it", to the "fact" that electrons are yellow, and likewise the other pupils completely ignore what Miss Lenhart just told them. The debate then starts as one pupil claims ''and protons are red?'', and another chimes in, with a ''No, they're gray!'' This only makes sense in a debate of how to draw atoms, not regarding their actual color, as Miss Lenhart just explained.

The opinions over the colors are probably based on what kind of diagrams people were initially exposed to, leading to a predisposition to think that those colors are 'correct'.

Although individual electrons do not have a color, it's possible to produce a solution of {{w|Solvated_electron|so-called 'solvated' electrons}}. In ammonia and amines, in certain concentrations, the solution color is blue, and in higher concentrations metallic gold to bronze.

The title text refers to the {{w|color charge}} property of quarks, a property which is part of {{w|quantum chromodynamics}}. In quantum chromodynamics, a quark's color can take one of three values or charges: red, green, and blue. An antiquark can take one of three anticolors: called antired, antigreen, and antiblue. As mentioned by [[Randall]], these have nothing to do with color as we know it, but is just a way to represent interactions between quarks in a sufficiently analogous fashion that avoids inventing entirely new words to describe a particular threefold quality of the necessary {{w|color confinement|inter-quark groupings}}. And he jokingly says that the 20th century physicists that came up with the three color system did this as as admission that numbers are boring. They could just have called the color charges "1", "2" and "3", though this may imply an unwarranted hierarchy, progression or other standard mathematical relationship that does not actually apply.

==Transcript==
:[Miss Lenhart is teaching a class. A boy with spiky hair sits at his desks with his hand raised asking a question. Jill sits in front of him looking back at him while leaning an arm on the back of her chair.]
:Miss Lenhart: You have a question?
:Boy: Yeah-What color are electrons and protons? Are they yellow? Red? Blue?

:[Zoom in on Miss Lenhart's head.]
:Miss Lenhart: Subatomic particles don't have a color.
:Miss Lenhart: They're too small to interact with visible light, so "color" isn't even defined for them.

:[Zoom back out but only showing Miss Lenhart. Three pupils reply from off-panel with speech lines coming from starburst at the right edge of the panel.]
:Miss Lenhart: That said, electrons are '''''definitely''''' yellow.
:Off-panel voice 1: I knew it!
:Off-panel voice 2: And protons are red, right?
:Off-panel voice 3: ''What?'' No! They're gray!

{{comic discussion}}

[[Category:Comics featuring Miss Lenhart]]
[[Category:Comics featuring Jill]]
[[Category:Kids]] 
[[Category:Physics]]

Category:Red Spiders

2023-01-22T18:07:21Z

WaddleDeo:

{{Infobox character 2
| image = 442_Red_Spider.png
| caption = A close-up of a Red Spider from [[442: xkcd Loves the Discovery Channel]]
| first_appearance = [[8: Red spiders]]
}}

*Red spiders (with six legs) were a recurring theme in early [[xkcd]] comics.
**They appear in at least 7 different comics, although they are no longer shown regularly. The last comic where they were mentioned was [[1110: Click and Drag]], in September 19, 2012.
**The picture shown here is not representative of the spiders, as the other versions of the spiders are more pink than red.
***In the last comic so far [[1110: Click and Drag]] they are even black and white, but can be recognized by their six legs.
**In [[47: Counter-Red Spiders]] there are no Spiders, but they are mentioned by name and that comic is part of the original series, which comprises the first four listed here below.
*Red spiders are also shown in the XKCD book volume 0 on the back cover.

{{navbox-characters}}

[[Category:Comic series]]
[[Category:Animals]]
[[Category:Spiders]]