<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
		<id>https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=172.70.126.11</id>
		<title>explain xkcd - User contributions [en]</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=172.70.126.11"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php/Special:Contributions/172.70.126.11"/>
		<updated>2026-06-24T05:46:04Z</updated>
		<subtitle>User contributions</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2957:_A_Crossword_Puzzle&amp;diff=346145</id>
		<title>Talk:2957: A Crossword Puzzle</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2957:_A_Crossword_Puzzle&amp;diff=346145"/>
				<updated>2024-07-11T04:25:32Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: wrong number&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;compare https://www.buttersafe.com/2011/02/17/crosswords/ --[[Special:Contributions/162.158.158.236|162.158.158.236]] 20:50, 10 July 2024 (UTC)&lt;br /&gt;
:randall has now updated the header for this comic to &amp;quot;Today's comic accidentally inspired by this Buttersafe comic from 2011!&amp;quot; and i feel bad for having spotted the similarity and commented on it within 1 minute of this page's creation --[[Special:Contributions/162.158.62.248|162.158.62.248]] 03:48, 11 July 2024 (UTC) (same anon as above)&lt;br /&gt;
&lt;br /&gt;
it's *A* crossword puzzle for a reason ;) -- 21:05, 10 July 2024 (UTC)&lt;br /&gt;
:I suspect that that reason is that someone will inevitably compare the information content of solving this crossword puzzle to the information content of narrating 1190. [[Special:Contributions/172.70.35.21|172.70.35.21]] 01:25, 11 July 2024 (UTC) I didn't sign. Was that rude? I'm new here, is it ok if I just ask questions?&lt;br /&gt;
&lt;br /&gt;
i’m trying to table-ify it but i keep getting edit conflicted. [[Special:Contributions/172.71.30.93|172.71.30.93]] 21:24, 10 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Surprised something like &amp;quot;Jagged and loose Hawaiian lava flow (2)&amp;quot; couldn't be fit in (unless I've missed it). Maybe because there were no two-letter answers at all, of course. (I think... Again, maybe I'm missing them.) [[Special:Contributions/172.70.86.38|172.70.86.38]] 21:30, 10 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
unfortunate that [https://tmbw.net/wiki/Aaa &amp;quot;antepenultimate track of They Might Be Giants' ''Glean''&amp;quot;] did not make it in --[[Special:Contributions/172.70.230.200|172.70.230.200]] 21:35, 10 July 2024 (UTC)&lt;br /&gt;
:And where is &amp;quot;Fonzie's catch-phrase&amp;quot;? Or does that end with a Y? [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 23:02, 10 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
Did I use the calculator wrong, or 12356631 in base 26 equals 111111, not AAAAAA? [[Special:Contributions/172.69.90.180|172.69.90.180]] 22:33, 10 July 2024 (UTC)&lt;br /&gt;
:anyone using base 26 is probably likely to be using all 26 letters, instead of ten numbers and sixteen letters. contextless, i would usually assume any base has standard decimal digits, but liberties have already been taken here so why not (please sign)&lt;br /&gt;
::I wasn’t sure enough to comment, but it looks like he miscalculated. 26^5 + 26^4 + 26^3 + 26^2 + 26^1 + 26^0 = 12355631 = 111111 in base 26. To be AAAAAA it would have to be 123556310. Of course, maybe he’s using A through Z instead of the expected 0 through 9 followed by letters A through P, the way hexadecimal is. [[Special:Contributions/172.70.210.52|172.70.210.52]] 23:16, 10 July 2024 (UTC)&lt;br /&gt;
:::If he’s using the letters A through Z as the ‘digits’ for base 26, then he’s still wrong, because A would be 0, Z would be 25 and 12355631 decimal would be BBBBBB in that base 26. [[Special:Contributions/172.70.210.235|172.70.210.235]] 00:54, 11 July 2024 (UTC)&lt;br /&gt;
:The &amp;quot;Qalculate&amp;quot; program has a number base setting called &amp;quot;Bijective base 26&amp;quot;, which outputs the answer as &amp;quot;AAAAAA&amp;lt;sub&amp;gt;B26&amp;lt;/sub&amp;gt;. [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 01:23, 11 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I'm surprised he didn't make this interactive, so you could type into all the cells to fill out the crossword. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 23:02, 10 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
I made and discarded various theories what the joke might be while I read through the questions, including all numbers, at least two possible solutions for the entire puzzle (I think that happened once in a newspaper), unknowable answers, … Only when I got to the &amp;quot;disregard for gravity&amp;quot; thing did I suspect the right answer and only because I once saw a meta gaming Stack exchange question about its tag. Otherwise it might have taken me until the Morse code question. This was really well hidden! [[User:Fabian42|Fabian42]] ([[User talk:Fabian42|talk]]) 01:23, 11 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
i dare not think about how long this took to make. [[user talk:lettherebedarklight|youtu.be/miLcaqq2Zpk]] 01:31, 11 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
https://crosshare.org/crosswords/2YcIAgtQCMBK6clsrNK4/mini-39-literally-screaming [[Special:Contributions/172.71.146.4|172.71.146.4]] 02:29, 11 July 2024 (UTC)&lt;br /&gt;
&lt;br /&gt;
It's traditionally doctors that ask you to &amp;quot;say AAAAAAA&amp;quot; when they examine your throat. I'm pretty sure 36 across is supposed to be a joke about how dentists make smalltalk with their fingers in your mouth. [[Special:Contributions/172.70.126.10|172.70.126.10]] 04:24, 11 July 2024 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2932:_Driving_PSA&amp;diff=342782</id>
		<title>2932: Driving PSA</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2932:_Driving_PSA&amp;diff=342782"/>
				<updated>2024-05-22T20:21:33Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: Spelling Fixes&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2932&lt;br /&gt;
| date      = May 13, 2024&lt;br /&gt;
| title     = Driving PSA&lt;br /&gt;
| image     = driving_psa_2x.png&lt;br /&gt;
| imagesize = 414x538px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = This PSA brought to you by several would-be assassins who tried to wave me in front of speeding cars in the last month and who will have to try harder next time.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a CLUELESS BOT DRIVING AT 72.42048 km/h (20.1168 m/s) (outpaced by raptor) - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
A PSA is a {{w|Public Service Announcement}}. Some drivers, when having {{w|Traffic#Passage_priority_(right_of_way)|priority}} by the rules of the road (termed &amp;quot;right of way&amp;quot; in US legal statutes), will let others take it before them. However, yielding the right of way when it is not required does not legally grant the other driver the right of way -- they may still be required to yield to other vehicles on the road. (Hence the title of the PSA: &amp;quot;Random drivers can't grant you the right of way as a gift.&amp;quot;)&lt;br /&gt;
&lt;br /&gt;
At a 4-way stop, giving another driver the right of way is usually safe and courteous, but in other cases it can be dangerous. This comic is saying that people who exhibit this behavior dangerously can be assumed to be {{w|The_Terminator|Terminator}}-style assassins, sent to kill you by sending you into contention with other traffic to make it look like an accident, and thereby prevent some future act on your part that is not to their liking.&lt;br /&gt;
&lt;br /&gt;
In this comic, the deferential driver is holding up a queue of vehicles (including a large tractor-trailer truck) that is obscuring the immediate view of oncoming traffic. But instead of simply turning left and reducing the queue, the deferential driver is waving Randall's car into traffic, perhaps because they forgot that the other lanes have priority over the crossing driver. The effect could be to wave them through right into the path of another car traveling at full speed, a clever way for a time-traveling assassin to take down one's target without arousing suspicion.&lt;br /&gt;
&lt;br /&gt;
Not pulling into traffic when your view is obstructed is good advice, and Randall's comical exaggeration may make the advice more memorable. Always check for yourself that your way is clear, and if your view is blocked, sit tight. &lt;br /&gt;
&lt;br /&gt;
However, Randall seems to be assuming that the waving gesture can only ever mean one thing: Pull all the way into traffic. It may be that a &amp;quot;waving out&amp;quot; gesture is intended to give the waiting car a chance to turn into the median strip (see details below). Viewing courteous behavior as conclusive evidence of a temporal assassination conspiracy is humorously ego-centric and improbable.&lt;br /&gt;
&lt;br /&gt;
The title text explains that Randall made this PSA because he has experienced this multiple times in the last month, and that the assassins should try harder next time. &lt;br /&gt;
&lt;br /&gt;
===Alternate interpretation of the waving gesture===&lt;br /&gt;
&lt;br /&gt;
Note that in this comic, as currently illustrated, there appears to be sufficient room in the median strip for the waiting car to pass the first set of lanes and stop in the median strip, protected from passing traffic on both sides, to legally wait for the second stream of traffic to safely subside. Waiting in this median turning area is a normal maneuver in suburban and exurban US areas where these types of non-signaled intersections are common. There's no reason to assume that the supposed would-be assassin is not simply waving the waiting car to the safety of the median strip. Randall's message of caution is still sound, but he accidentally illustrated an intersection diagram that fails to optimally support his case.&lt;br /&gt;
&lt;br /&gt;
[[File:2932 Alt.png|frameless|Illustration showing room to safely turn left halfway, stopping in the median strip]] &lt;br /&gt;
&lt;br /&gt;
'''Legality'''&lt;br /&gt;
&lt;br /&gt;
Median strips are typically used to allow vehicles to safely make left turns without impeding the flow of traffic. When emerging from a side road, vehicles can cross the first lane(s) of traffic and wait in the median strip until it is safe to merge into the opposite lane(s).&lt;br /&gt;
* In Texas, using the median strip to wait for a gap in traffic is generally acceptable. The Texas Department of Public Safety suggests that drivers use the median strip when appropriate. Source: [https://www.texashighwayman.com/laws.shtml Texas laws]&lt;br /&gt;
* [https://le.utah.gov/xcode/Title41/Chapter6A/41-6a-S801.html?v=C41-6a-S801_2015051220150512 The state of Utah also allows this to happen.]&lt;br /&gt;
* In {{w|Denmark}}, it is considered bad practice to pause in the median strip when crossing; left turns should be carried out in a continuous maneuver.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
:Driving PSA:&lt;br /&gt;
:Random drivers can’t grant you the right of way as a gift.&lt;br /&gt;
:[A T-intersection with a major road separated by a concrete median going from top to bottom, and a minor road coming from the left]&lt;br /&gt;
:[A car is stopped at the end of the minor road]&lt;br /&gt;
:First car [arrow pointing to car]: You, waiting to turn left&lt;br /&gt;
:[A second car is stopped in the dedicated left turn lane of the right major road, with a third car, a truck hauling cargo, and a fourth car lined up behind it]&lt;br /&gt;
:Second car [in a speech bubble]: You go ahead! I’m feeling generous.&lt;br /&gt;
:Second car [arrow pointing to car]: Time traveler pretending to be polite&lt;br /&gt;
:[In the second lane is a black arrow pointing upwards, with text below it reading 45 MPH, and a fifth car below the text]&lt;br /&gt;
:Fifth car [arrow pointing to car]: Car that they are waving you into the path of&lt;br /&gt;
:If someone waves you out, assume that they are an assassin sent from the future to kill you and make it look like an accident.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Time travel]]&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=43:_Red_Spiders_2&amp;diff=316153</id>
		<title>43: Red Spiders 2</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=43:_Red_Spiders_2&amp;diff=316153"/>
				<updated>2023-06-25T22:11:44Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: Added to title-text explanation to make it more than a restatement.&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 43&lt;br /&gt;
| date      = December 2, 2005&lt;br /&gt;
| title     = Red Spiders 2&lt;br /&gt;
| image     = red_spiders_2.jpg&lt;br /&gt;
| titletext = This was actually drawn years before Red Spiders&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
&lt;br /&gt;
This is the second published comic in the [[:Category:Red Spiders|red spiders]] story arc, published just over 2 months after the [[8: Red spiders|first one]]. Like its predecessor, it is more of a sketch than a comic. The titular spiders appear to be ascending —or possibly building— a structure, probably to get into the window at the top of the picture. Two spiders at the top appear to be passing a block between them, implying that they are, at least, trying to change the structure.&lt;br /&gt;
&lt;br /&gt;
According to the title text, it was drawn years before [[:8: Red spiders|the previous Red Spiders]] despite being posted later.&lt;br /&gt;
&lt;br /&gt;
The full series of [[:Category:Red Spiders|Red Spiders]] comics:&lt;br /&gt;
*[[8: Red Spiders]], the first one.&lt;br /&gt;
*[[43: Red Spiders 2]], this one.&lt;br /&gt;
*[[47: Counter-Red Spiders]], in which the humans begin a counter-offensive.&lt;br /&gt;
*[[126: Red Spiders Cometh]], in which the spiders attack a city.&lt;br /&gt;
*[[427: Bad Timing]], in which, in a style more typical to xkcd, the spiders attack a couple in the middle of a serious relationship discussion in a hot-air balloon.&lt;br /&gt;
*[[442: xkcd Loves the Discovery Channel]], in which it appears briefly in the 14th panel crawling over a cube.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[Nine red spiders, with round appendages at the end of each of their six legs, are seen navigating an environment of blocks and other geometric constructions. The second-from-the-top spider appears to be holding a block down for the spider just below to climb on to help it up, or they might be lifting the block together. One is almost outside the frame at the top.]&lt;br /&gt;
&lt;br /&gt;
==Trivia==&lt;br /&gt;
*This was the 40th comic originally posted to [[LiveJournal]].&lt;br /&gt;
**The previous was [[38: Apple Jacks]].&lt;br /&gt;
**The next was [[39: Bowl]].&lt;br /&gt;
*Original title: &amp;quot;Friday's Drawing - Red Spiders 2&amp;quot;&lt;br /&gt;
*Original [[Randall]] quote: &amp;quot;And lo, they still have six legs. &amp;quot;&lt;br /&gt;
**In the comments on LiveJournal, he made the following remark. &amp;quot;This is the original that inspired the other one. It's my favorite of the two.&amp;quot;&lt;br /&gt;
**This latter comment is reflected in the title text the comic received when posted on xkcd.&lt;br /&gt;
**It shows that the original comment did not really make sense, since it was really the spiders in the first, [[8: Red spiders]], which still had six legs.&lt;br /&gt;
*This comic was posted on [[xkcd]] when the web site opened on Sunday the 1st of January 2006.&lt;br /&gt;
**It was posted along [[:Category:First day on xkcd|with all 41 comics]] posted before that on LiveJournal as well as a few others.&lt;br /&gt;
**The latter explaining why the numbers of these 41 LiveJournal comics ranges from 1-44.&lt;br /&gt;
*One of the original drawings drawn on [[:Category:Checkered paper|checkered paper]].&lt;br /&gt;
&lt;br /&gt;
{{Comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Posted on LiveJournal| 40]]&lt;br /&gt;
[[Category:First day on xkcd]]&lt;br /&gt;
[[Category:Comics with color]]&lt;br /&gt;
[[Category:Checkered paper]]&lt;br /&gt;
[[Category:Red Spiders]]&lt;br /&gt;
[[Category:Comics sharing name|Red Spiders02]]&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2525:_Air_Travel_Packing_List&amp;diff=295414</id>
		<title>2525: Air Travel Packing List</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2525:_Air_Travel_Packing_List&amp;diff=295414"/>
				<updated>2022-09-24T10:00:34Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2525&lt;br /&gt;
| date      = October 6, 2021&lt;br /&gt;
| title     = Air Travel Packing List&lt;br /&gt;
| image     = air_travel_packing_list.png&lt;br /&gt;
| titletext = I know the etiquette is controversial, but I think it's rude when the person in front of me reclines their seat into the bell of my trumpet.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
This comic is another in a [[:Category:COVID-19|series of comics]] related to the {{w|COVID-19 pandemic}}. &lt;br /&gt;
&lt;br /&gt;
The comic is about a proposed air-travel packing list, and the humor stems from the fact that many people have not been flying during the pandemic, and thus they might have forgotten what to pack. So [[Randall]] is so kind as to provide a packing list with 20 items. However, apart from the first item, the rest is not something you would or even should normally bring on an airplane.&lt;br /&gt;
&lt;br /&gt;
Many of the items are already found on passenger airplanes, some items would seem like they could be useful on a plane, while others could actually be useful in case of a plane crash (but only if you survive), while many others would be counter-productive to safe air travel, even in the event of a crash. Below in [[#Table of items|the table]] is a quick summary of each item.&lt;br /&gt;
&lt;br /&gt;
The title text references the idea that there is a trumpet for each passenger provided by the airline, which is item number 16 on the list. This items also states that you, because of the COVID-19 pandemic, should remember to bring your own mouthpiece for the trumpet as a safety measure. &lt;br /&gt;
&lt;br /&gt;
The trumpet idea is then combined with the common debate regarding reclining your seat in airplanes. About half of the people think that reclining is rude as it takes up the space of the person behind you. The other half think that seats recline for a reason and the person in a seat has the rights to the space behind them. See for instance this [https://www.youtube.com/watch?v=08A30v8isRs video] about such a debate. Reclining a seat has resulted in actual [https://www.independent.co.uk/news/world/americas/crime/fight-airplane-man-punch-video-b1895402.html physical fights] on board airplanes.&lt;br /&gt;
&lt;br /&gt;
Here it seems that Randall sides with the anti-recliners, although maybe only in the context of the comic, because he states that reclining would prevent him from playing his trumpet, as the seat hits the bell of the trumpet. The person in front could certainly argue that playing the trumpet behind them would be very annoying, to which Randall could reply that because the trumpet is provided by the airline, he has the right to play it. This would add a new layer to the debate. This could also be Randall's way of arguing against the right to recline a seat, just because it is possible.&lt;br /&gt;
&lt;br /&gt;
===Table of items===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
! Item&lt;br /&gt;
! Explanation&lt;br /&gt;
|-&lt;br /&gt;
|Seat cushion&lt;br /&gt;
|This item is a play on sports stadium bleachers (sports stadiums were another venue commonly closed during the pandemic), because many sports fans find stadium bleachers uncomfortable and prefer to bring their own seat cushions. Airlines usually provide their own seat cushions for passengers, which are specially designed to float in water in the event of a plane crash.&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Parachute}}&lt;br /&gt;
|Parachutes are normally used to slow down your falling out of the sky to a relatively safe speed in case of a severe problem with your aircraft, and are routinely used as a safety device by (para)glider pilots, test pilots, military aircraft crew and in similar situations when being unable to land safely is a significant concern. A parachute won't be very useful in a typical passenger airplane (even a small one) as there is no easy way to safely exit such a plane in-flight. Even the airplanes used for {{w|skydiving}} need to be specifically designed or modified for that purpose, such as having wide sliding doors that are unaffected by airflow. However, there were individual cases of people being ejected or sucked out of a passenger airplane, often during partial or complete break-up of the aircraft; in such case a parachute could arguably be useful.{{Citation needed}} Famously, [[:Category:Comics featuring D. B. Cooper|D.B. Cooper]] jumped from an airplane in flight, with a parachute but was never knowingly seen again.&lt;br /&gt;
|-&lt;br /&gt;
|Wing glue&lt;br /&gt;
|Probably to repair wings in the event of damage, potentially in a crash. This would be tricky (but not necessarily impossible) to apply mid-flight. This is the first of several items that are potentially useful to the flight crew or maintenance teams, but would not be useful or appropriate for passengers to bring aboard. Minor repairs (including to the wings) can be made by service personnel using {{w|speed tape}}, tape specially designed for high-speed applications. Speed tape might be mistaken for ordinary duct tape by passengers.&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Air horn}}&lt;br /&gt;
|An air horn uses compressed air to make a very loud noise, very easily. This may be important for drawing attention to yourself in the event of a crash. Typically, emergency life-jackets on a plane are provided with a light and whistle for this purpose. The noise of an air horn might prove more effective for this purpose than a whistle, but it would become useless as soon as the compressed air ran out. Its inclusion is probably meant to suggest that the word 'air' in its name indicates that it's designed for use in an aircraft. Using one in a non-emergency situation would infuriate everyone else on the plane.{{citation needed}}&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Sextant}}&lt;br /&gt;
|In combination with star charts, a sextant can be used to determine your position based on the location of stars in the night sky. Alternately, in combination with an accurate clock, a sextant can be used to find the position of the sun relative to the aircraft to determine the vehicle's position.  In a crash, you could use this to find your way to a safe place, but sextants are rarely used, and most people are not trained on how to operate one. GPS will also allow you to find your position, is built into many phones, and is faster and easier to use than a sextant. If you've got a homing beacon, it probably makes more sense to just activate that and wait for help to arrive.&lt;br /&gt;
&lt;br /&gt;
Until the early 1980s, long-range airplanes had a {{w|Air_navigation#Flight_navigator|flight navigator}} who used sextants and {{w|celestial navigation}} to determine the position of the airplane. Interestingly, it was much more accurate than early {{w|inertial navigation system}}s, and the accuracy of celestial navigation is still useful today. What made the sextant redundant was the INS' lower workload - the error accumulated by the INS during a long oceanic flight could always and easily be mitigated by other means, for example with {{w|VHF omnidirectional range|VOR}}/{{w|Non-directional beacon|NDB}} radio beacons.&lt;br /&gt;
&lt;br /&gt;
A form of the sextant has also famously been used in {{w|Apollo_PGNCS#Optical_units|spacecraft navigation}} and similarly applied {{w|star tracker}}s have been used extensively to guide space-going craft ranging from suborbital missiles to interplanetary probes.&lt;br /&gt;
|-&lt;br /&gt;
|Nose plugs and goggles for pressure&lt;br /&gt;
|Nose plugs and goggles are commonly used in swimming but would be useless for dealing with cabin pressurization or depressurization. Since your mouth and nose are interconnected, nose plugs would be useless on their own. Trying to hold your breath in a sudden depressurization event will cause lung damage, so nose plugs wouldn't be a good thing, even if you could also seal off your mouth. Goggles would also not be useful. During depressurization, the air would just seep out. During pressurization, they would just become uncomfortable and difficult to remove.&lt;br /&gt;
&lt;br /&gt;
Goggles were a typical piece of equipment for pilots of open cockpit airplanes, whose popularity peaked before the pandemic.{{Citation needed}} Nose plugs may be a reference to the spark plugs used on the engines of such vehicles.&lt;br /&gt;
&lt;br /&gt;
Or nose plugs may be mentioned as it is similar to, but a silly mistake to use in place of, the ear plugs some people use on airplanes to help prevent discomfort as a result of a change in pressure.&lt;br /&gt;
&lt;br /&gt;
|-&lt;br /&gt;
|Airplane shoes&lt;br /&gt;
|Airlines typically don't require the use of special footwear for passengers, nor do they provide special shoes. Before emergency egress, certain shoes (like high heels) must be discarded, though. Aircrew are also prohibited from wearing such shoes. May also be a reference to {{w|boat shoe|boat shoes}}, which are designed to reduce slipping on the wet decks of watercraft.&lt;br /&gt;
|-&lt;br /&gt;
|Navigation crystal&lt;br /&gt;
|Mystical form of navigation, presumably either for navigation during flight or to help you get home after a crash.&lt;br /&gt;
Crystals that polarize light can be used as a compass [http://www.polarization.com/viking/viking.html], but even then, their utility would be limited.&lt;br /&gt;
|-&lt;br /&gt;
|Spare batteries in case the plane runs out&lt;br /&gt;
|Airplanes will generally use more power than any battery small enough to be easily packed in a bag could provide. The aircraft will generally use either 115V AC at 400Hz or 28V DC, both of which are very uncommon outside of aviation. The airplane will almost never use its own batteries in-flight anyway, getting its electric power from the main engines, the APU, or, in emergencies, the ram air turbine or similar generating device. The batteries are generally only used on the ground when the engines are not running. Could be to charge a phone or similar device if the plane runs out of outlets.&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Birdseed}}&lt;br /&gt;
|So one can attract birds. In practice, this wouldn't work for multiple reasons (high speed, altitude, and sealed windows being some of most obvious ones) and would pose a significant hazard of birds getting stuck in an engine if it did. Spreading birdseed before boarding ''could'' work to attract birds, but would be seen as misconduct by airport authorities, as attracting birds close to aircraft would pose a danger to the aircraft. Alternatively, birdseed can be used to attract birds after surviving a crash, e.g. to catch them for food.&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Homing beacon}}&lt;br /&gt;
|Once activated, a homing beacon will send out a continuous radio signal so that rescuers can find your location. These can be very useful in a plane crash, but airplanes already carry them ({{w|Emergency position-indicating radiobeacon}}s), so you don't need to pack one yourself. Incidentally, the {{w|COSPAS-SARSAT}} system for locating distressed airplanes and ships was a cooperation started by the United States and the Soviet Union, and it was an elegant and simple solution that uses the {{w|Doppler effect}} of radio signals for accurate location - long before the {{w|Global Positioning System}}.&lt;br /&gt;
|-&lt;br /&gt;
|Meteorite antidote&lt;br /&gt;
|Meteorites are pieces of space rocks that make it all the way to the ground. They can cause injury but they aren't generally poisonous{{Citation needed}}, so an antidote would not help. The antidote could be an antidote to something else, possibly snakebite and be derived from meteorites but meteorites also lack verified medicinal properties.&lt;br /&gt;
|-&lt;br /&gt;
|USB wing connector&lt;br /&gt;
|This is just a wire connector, but because it has wing in the name is on the list. Alternatively, the plane wings connect by USB, and this can be used to reattach wings. Airplanes usually use the {{W|ARINC 429}} protocol (or, increasingly, TCP/IP, RS427, RS232, or even CANBUS) instead of USB protocols to facilitate electronic communication between flight computers and the engines, for example.&lt;br /&gt;
|-&lt;br /&gt;
|Emergency siren&lt;br /&gt;
|Very much like air horn, would be useful for helping with locating you in the event of crash. It shares many of the same downsides, but would also more likely get damaged by water in case of a water landing.&lt;br /&gt;
|-&lt;br /&gt;
|Spare {{w|Flap (aeronautics)|flaps}}&lt;br /&gt;
|Flaps can be moved to adjust the lift/drag ratio of a wing, and are generally deployed during takeoff and landing when the aircraft's speed is slower. Flaps are very large and mounted on the wing, outside the passenger compartment, so bringing spares would be very difficult and completely useless. Flaps failing to deploy can usually be remedied by just landing at a longer runway.&lt;br /&gt;
|-&lt;br /&gt;
|{{w|Mouthpiece (brass)|Mouthpiece}} (pandemic restriction; airlines still provide the trumpet)&lt;br /&gt;
|A part of a brass instrument like a trumpet. Randall jokes that trumpets are provided on airplanes (which would be very obnoxious to other passengers), but due to the pandemic you cannot use a shared mouthpiece. (You shouldn't share mouthpieces for anything anyway, in general.)&lt;br /&gt;
|-&lt;br /&gt;
|Luggage {{w|ballast}}&lt;br /&gt;
|Likely to make plane more balanced. While balancing weight in a plane is indeed a real problem, it is solved by rearranging luggage and adjusting engine power slightly. Introducing ballast would mean additional weight for no real reason.&lt;br /&gt;
Alternatively, while a common passenger issue is to have hand- and/or hold-luggage that exceeds the airline's personal allowance, this person has ''under''weight baggage and does not wish to 'waste' the difference, so bulks it up. (Noting that someone already with the rest of the items on this list is unlikely to suffer this 'problem'.)&lt;br /&gt;
|-&lt;br /&gt;
|Flag (international flights)&lt;br /&gt;
|To identify your country of origin. Other flags are also used to communicate between boats without electricity, in the event the boats are in distress, so they could be used in the event of a crash.&lt;br /&gt;
|-&lt;br /&gt;
|Decoy tickets&lt;br /&gt;
|Maybe these would used as a distraction so you can sneak onto the plane without paying?&lt;br /&gt;
But also a typical trope for fictional (and real life?) attempts to evade being tracked or followed. Buy tickets for one destination, that one assumes the opposition will be fully aware of, but also arrange for another set (probably with a 'clean' identity) for your intended destination and switch to using those once in the chaos of the departure-lounge.&lt;br /&gt;
|-&lt;br /&gt;
|Keys to the plane&lt;br /&gt;
|Although some people pushed for it after an airplane was stolen in the {{w|2018 Horizon Air Q400 incident}}, most commercial planes do not require keys to start the engine(s) like a car does. Likewise, plane doors are not locked with a key. Instead, they are secured with a tamper seal. If a seal is found broken, the plane is thoroughly checked for any wrong-doing.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A lists of 20 items is given in two columns with 10 items in each. Each item is preceded by a checkbox. Most items only take up one line, but in the left column two items take up two and in the right one item take up three, so they take up the same space. Above is a large heading, with an explanation beneath it.]&lt;br /&gt;
:&amp;lt;big&amp;gt;&amp;lt;big&amp;gt;Air Travel Packing List&amp;lt;/big&amp;gt;&amp;lt;/big&amp;gt;&lt;br /&gt;
:&amp;lt;big&amp;gt;If you haven't flown in a while, you might not remember what you need to bring. Use this handy checklist to pack!&amp;lt;/big&amp;gt;&lt;br /&gt;
&lt;br /&gt;
:[Left column:]&lt;br /&gt;
:☐ Seat cushion&lt;br /&gt;
:☐ Parachute&lt;br /&gt;
:☐ Wing glue&lt;br /&gt;
:☐ Air horn&lt;br /&gt;
:☐ Sextant&lt;br /&gt;
:☐ Nose plugs and goggles for pressure&lt;br /&gt;
:☐ Airplane shoes&lt;br /&gt;
:☐ Navigation crystal&lt;br /&gt;
:☐ Spare batteries in case the plane runs out&lt;br /&gt;
:☐ Birdseed&lt;br /&gt;
&lt;br /&gt;
:[Right column:]&lt;br /&gt;
:☐ Homing beacon&lt;br /&gt;
:☐ Meteorite antidote&lt;br /&gt;
:☐ USB wing connector&lt;br /&gt;
:☐ Emergency siren&lt;br /&gt;
:☐ Spare flaps&lt;br /&gt;
:☐ Mouthpiece (Pandemic restriction; airlines still provide the trumpet)&lt;br /&gt;
:☐ Luggage ballast&lt;br /&gt;
:☐ Flag (International flights)&lt;br /&gt;
:☐ Decoy tickets&lt;br /&gt;
:☐ Keys to the plane&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Aviation]]&lt;br /&gt;
[[Category:COVID-19]]&lt;br /&gt;
[[Category:Animals]]&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2668:_Artemis_Quote&amp;diff=294319</id>
		<title>2668: Artemis Quote</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2668:_Artemis_Quote&amp;diff=294319"/>
				<updated>2022-09-06T05:35:34Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2668&lt;br /&gt;
| date      = September 5, 2022&lt;br /&gt;
| title     = Artemis Quote&lt;br /&gt;
| image     = artemis_quote.png&lt;br /&gt;
| titletext = Another option: &amp;quot;It is an honor to be the first human to set foot on the moon.&amp;quot;&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|created by a COLLABORATIVE EFFORT. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
The {{w|Artemis program}} is a series of planned space missions that will land people on the Moon and begin to set up infrastructure for a permanent crewed presence. People first landed on the Moon in 1969 as part of the {{w|Apollo program}}. They have not been back since 1972.&lt;br /&gt;
&lt;br /&gt;
When {{w|Neil Armstrong}} became the first person to walk on the Moon, he famously said, &amp;quot;That's one small step for man; one giant leap for mankind.&amp;quot; However, he was intending to say, &amp;quot;That's one small step for '''''a''''' man; one giant leap for mankind [emphasis added].&amp;quot; [https://upload.wikimedia.org/wikipedia/commons/4/48/Frase_de_Neil_Armstrong.ogg The audio recording] omits the word &amp;quot;a&amp;quot;, making the sentence confusing, as &amp;quot;man&amp;quot; and &amp;quot;mankind&amp;quot; have the same meaning when referring to all people. That it was apparently elided by Armstrong in the excitement, changing the meaning of the historical phrase, is controversial and thus humorous. Subsequently, Armstrong and others have blamed insufficiently tuned {{w|voice activity detection}} hardware circuitry intended to save power in radio voice transmission, but NASA engineers, third-party historians and their hired experts have never been able to corroborate that explanation.[https://www.hq.nasa.gov/office/pao/History/alsj/a11/a11.step.html][http://itre.cis.upenn.edu/~myl/languagelog/archives/003645.html] Armstrong later said he hoped, &amp;quot;history would grant me leeway for dropping the syllable and understand that it was certainly intended, even if it was not said,&amp;quot; and, on p.126 of the June 1982 edition of ''Omni,'' &amp;quot;the 'a' is implied, so I'm happy if they just put it in parentheses.&amp;quot;&lt;br /&gt;
&lt;br /&gt;
[[Randall]] suggests that the first Artemis astronaut to set foot on the Moon has a duty to utter an even more confusing quote, saying the sentence, &amp;quot;This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the moon,&amp;quot; aloud as they step onto the Moon. That would be confusingly self-referential, as if they were alluding to something from the past. This is very unlikely, and funny merely as a recommendation. If it actually happened, it might be both hilarious and scandalous.&lt;br /&gt;
&lt;br /&gt;
The title text suggests an alternate phrase by which the Artemis astronaut could say being the first (rather than 13th) person on the Moon is a great honor. People hearing this quote in the future could assume that Artemis was the first crewed mission to the Moon. It could feed into contemporary conspiracy theories that the Apollo landings were faked, or that previous moon landings had been done by non-humans, furthering the confusion. &lt;br /&gt;
&lt;br /&gt;
=== Esoterica ===&lt;br /&gt;
* The {{w|schwa}} indefinite article &amp;quot;a&amp;quot; is optional in certain contexts of most dialects of American English.[https://linguapress.com/grammar/article-in-english.htm] &lt;br /&gt;
* While the comic's lunar lander has similarities to the {{w|Starship HLS|current plans}} for the Artemis lander,[https://www.nasa.gov/press-release/as-artemis-moves-forward-nasa-picks-spacex-to-land-next-americans-on-moon] it's a generic drawing, perhaps in homage to classic space science fiction, with the exit portal at an unlikely position near the base of the {{w|SpaceX Starship}} lander.[https://www.teslarati.com/spacex-starship-moon-elevator-nasa-prototype/]&lt;br /&gt;
* This comic coincides with the canceled launch of {{w|Artemis 1}}, an uncrewed test mission which will serve as the start of the Artemis program. The mission was intended to launch on 29 August 2022, and later on 3 September 2022, but was repeatedly postponed due to a series of technical problems and will now take place no earlier than late September 2022.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[The surface of the Moon, with characteristic craters and rocks across a landscape and a slightly curved horizon. In the foreground, a vertical rocket standing on four deployed legs. A short ladder, or set of steps, leads down from a hatch in the lower part of the rocket body. The figure of an astronaut has stepped forward onto the Moon's surface.]&lt;br /&gt;
&lt;br /&gt;
:Astronaut: This is one of my favorite historical quotes — the first words spoken by an Artemis astronaut on the Moon.&lt;br /&gt;
&lt;br /&gt;
:Caption: Neil Armstrong's &amp;quot;man&amp;quot;/&amp;quot;a man&amp;quot; quote created a lot of historical confusion, and I think it's our duty to expand on that legacy with Artemis.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2668:_Artemis_Quote&amp;diff=294186</id>
		<title>2668: Artemis Quote</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2668:_Artemis_Quote&amp;diff=294186"/>
				<updated>2022-09-05T21:40:51Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2668&lt;br /&gt;
| date      = September 5, 2022&lt;br /&gt;
| title     = Artemis Quote&lt;br /&gt;
| image     = artemis_quote.png&lt;br /&gt;
| titletext = Another option: &amp;quot;It is an honor to be the first human to set foot on the moon.&amp;quot;&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|That's one small step for a MEAT POPSICLE. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
The Artemis program is a series of planned space missions that will land humans on the moon and begin to set up infrastructure for a permanent human presence. Humans first landed on the moon in 1969 as part of the Apollo program. They have not been back since 1972.  &lt;br /&gt;
&lt;br /&gt;
When one of the first two humans on the moon, {{w|Neil Armstrong}}, took the first step on the moon, he was scripted to say, &amp;quot;That's one small step for '''a''' man, but a giant leap for mankind&amp;quot; ,[emphasis added]. In the audio recording he seems to have left out the word &amp;quot;a&amp;quot;, making the sentence confusing and self-contradictory. This recording was broadcast worldwide at the time and has become a famous historical quote. However, the extent to which the {{w|schwa}} grammatical article, &amp;quot;a&amp;quot;, optional in certain dialects of American English,{{Actual citation needed}} was apparently elided by Armstrong in the excitement, modifying the semantic meaning of the historical phrase, is controversial and therefore funny. Subsequently Armstrong and others have blamed insufficiently tuned {{w|voice activity detection}} hardware circuitry intended to save power in radio voice transmission, but NASA engineers and third-party historians and their hired experts have never been able to corroborate that excuse.&lt;br /&gt;
&lt;br /&gt;
Randall proposes that the first Artemis astronaut should create an even more confusing quote by referring to the sentence they are currently speaking as if they are quoting something from their past.&lt;br /&gt;
&lt;br /&gt;
The title text suggests an alternate phrase by which the Artemis astronaut would claim to be the first (rather than 13th) human on the moon. People hearing this quote in the future would assume that Artemis was the first manned moon mission. It could also be meant as a phrase Armstrong could have used with less chance of flubbing, but seems inappropriately self-aggrandizing for the mild-mannered car salesman astronaut.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
{{incomplete transcript|Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
:[The surface of the moon, with craters and rocks, and a rocket with a ladder attached and an astronaut stepping onto the moon's surface.]&lt;br /&gt;
:Astronaut: This is one of my favorite historical quotes -- the first words spoken by an Artemis astronaut on the moon.&lt;br /&gt;
&lt;br /&gt;
:Caption: Neil Armstrong's &amp;quot;man&amp;quot;/&amp;quot;a man&amp;quot; quote created a lot of historical confusion, and I think it's our duty to expand on that legacy with Artemis.&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=950:_Mystery_Solved&amp;diff=294040</id>
		<title>950: Mystery Solved</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=950:_Mystery_Solved&amp;diff=294040"/>
				<updated>2022-09-03T04:43:35Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: /* Transcript */&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;{{comic&lt;br /&gt;
| number    = 950&lt;br /&gt;
| date      = September 12, 2011&lt;br /&gt;
| title     = Mystery Solved&lt;br /&gt;
| image     = mystery_solved.png&lt;br /&gt;
| 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'.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
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.&lt;br /&gt;
&lt;br /&gt;
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:&lt;br /&gt;
* 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.)&lt;br /&gt;
* How did she survive that long, apparently without aging?&lt;br /&gt;
* 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) or run out of fuel?&lt;br /&gt;
* Why didn't anyone else see her on her journey or at least detect her with radar?&lt;br /&gt;
* Why doesn't she know that a flight shouldn't take 74 years? &lt;br /&gt;
&lt;br /&gt;
Another possibility is that she did not just fly around the earth, but flew very fast (near {{w|light speed}}) for 74 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.&lt;br /&gt;
&lt;br /&gt;
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.&lt;br /&gt;
&lt;br /&gt;
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. &lt;br /&gt;
&lt;br /&gt;
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].&lt;br /&gt;
&lt;br /&gt;
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. The current head of the Teamsters is in fact named {{w|James P. Hoffa|James Hoffa}} (he is Jimmy Hoffa's son and goes by &amp;quot;James P. Hoffa&amp;quot; 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 &amp;quot;son&amp;quot; doesn't look suspiciously older than he claims to be.&lt;br /&gt;
&lt;br /&gt;
==Transcript==&lt;br /&gt;
:[A twin prop airplane flies high overhead.]&lt;br /&gt;
:Off-screen person: What's that airplane?&lt;br /&gt;
&lt;br /&gt;
:[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.]&lt;br /&gt;
:Off-screen person: Holy crap— Is that Amelia Earhart?&lt;br /&gt;
&lt;br /&gt;
:[A close up of Amelia Earhart waving.]&lt;br /&gt;
:Amelia: Hey everyone! My flight was a success!&lt;br /&gt;
:Off-screen person: But... Where were you!?&lt;br /&gt;
&lt;br /&gt;
:[A wide view of Amelia, she stops waving.]&lt;br /&gt;
:Amelia: I flew around the world!&lt;br /&gt;
:Off-screen person: But you disappeared in 1937!&lt;br /&gt;
&lt;br /&gt;
:[A close up of Amelia Earhart.]&lt;br /&gt;
:Amelia: Right, to fly around the world.&lt;br /&gt;
:Off-screen person: It's 2011!&lt;br /&gt;
:Amelia: The world is big. It's a long flight.&lt;br /&gt;
&lt;br /&gt;
:[A wide view of Amelia]&lt;br /&gt;
:Off-screen person: &lt;br /&gt;
::But you... &lt;br /&gt;
::It's not... &lt;br /&gt;
::I -&lt;br /&gt;
:Amelia: Can I talk to someone smarter?&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
[[Category:Comics featuring Amelia Earhart]]&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2666:_Universe_Price_Tiers&amp;diff=293950</id>
		<title>Talk:2666: Universe Price Tiers</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2666:_Universe_Price_Tiers&amp;diff=293950"/>
				<updated>2022-09-02T13:38:06Z</updated>
		
		<summary type="html">&lt;p&gt;172.70.126.11: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
&lt;br /&gt;
We seem to be in Universe Standard, based on the cosmic speed limit&lt;br /&gt;
[[User:Victor|Victor]] ([[User talk:Victor|talk]]) 22:03, 31 August 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Is the price per user (human)? Or payed by the &amp;quot;god&amp;quot; who runs the universe?&lt;br /&gt;
The interpretation would change quite a bit. If per user, some could travel fast while others would not see ads and could even be immortal.&lt;br /&gt;
If per universe, would the concept of ads disappear?&lt;br /&gt;
[[User:Victor|Victor]] ([[User talk:Victor|talk]]) 22:25, 31 August 2022 (UTC)&lt;br /&gt;
::The tree sound can't be a particular human's experience, and the speed limit seems intended to be per universe.&lt;br /&gt;
&lt;br /&gt;
General comment, I think each line of the table should have a separate one-line or one-paragraph explanation, rather than squishing it into one column of a table which mostly reproduces the comic text. i.e. we don't need the table in the explanation, although it works fine in the transcript imo. [[Special:Contributions/172.69.62.71|172.69.62.71]] 23:40, 31 August 2022 (UTC)edit: a word&lt;br /&gt;
&lt;br /&gt;
&amp;quot;Yes, and he cheats&amp;quot; may be a reference to a quote from ''Sid Meier's Alpha Centauri''.&lt;br /&gt;
::I fully expected something like ''&amp;quot;Most gods throw dice, but Fate plays chess, and you don't find out 'til too late that he's been playing with two queens all along.&amp;quot;'' (from ''Interesting Times'' by Terry Pratchett) [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 01:47, 1 September 2022 (UTC)&lt;br /&gt;
::The SMAC quote is &amp;quot;Einstein would turn over in his grave. Not only does God play dice, the dice are loaded. - Chairman Sheng-ji Yang&amp;quot;, from the Probability Mechanics tech. Also, the &amp;quot;God does not play dice&amp;quot; quote is stated during the Supercollider secret project movie. I doubt the comic is referencing any particular media here, though. [[Special:Contributions/172.69.22.5|172.69.22.5]] 02:40, 1 September 2022 (UTC)&lt;br /&gt;
::Meanwhile, Stephen Hawking said &amp;quot;Not only does God play dice, but... he sometimes throws them where they cannot be seen.&amp;quot; -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 16:01, 1 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Under ''Number of angels that can dance on the head of a pin'', '64' is 2⁵ and may be making reference to the Nintendo 64 game system. [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 01:54, 1 September 2022 (UTC)&lt;br /&gt;
::And just for the record, 4096 is 2¹². [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]])&lt;br /&gt;
&lt;br /&gt;
:: Note that the philosophical question of how many angels can dance on the head of a pin turns to have much more useful meaning if we realize that the question wasn't if 64 or 4096, but if it's a finite or infinite number, that is, if angels are subject to {{w|Pauli's exclusion principle}}. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 15:59, 1 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
::: I think the answer is [https://www.imdb.com/title/tt8071704/characters/nm0000531 to be found elsewhere]. And it is a different power of 2! [[Special:Contributions/172.70.162.147|172.70.162.147]] 17:26, 1 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
Who is paying our subscription? How do we ensure we don't get demoted to lite?&lt;br /&gt;
&lt;br /&gt;
Here, the sound of one hand clapping is pretty much &amp;quot;toop.&amp;quot; Put your hand out flat fingers together, and no thumb involved, quickly make a fist. Toop. Edit I'm not making a fist. Im keeping the last joints straight and smacking my hand[[Special:Contributions/172.70.134.95|172.70.134.95]] 15:59, 1 September 2022 (UTC)&lt;br /&gt;
:But two hands each doing that (or slapping another bit of body) aren't &amp;quot;two hands clapping&amp;quot;, but more like two hands ''clasping''/something-or-other-like-that.&lt;br /&gt;
:If you could bring your one hand to a sudden stop in mid-air ''as if'' hitting another hand, it might be closer, but there's no sudden stop possible like a contact-stop. Plus a full-fledged clap for maximum ovational volume involves cupped hands trapping a resonant volume of air between them, almost sealed (wet hands so positioned can be used to force a squeaky-fart sound out from between them), and neither an &amp;quot;air clap&amp;quot; or the toop-clasp can do anything so dramatic with a solo hand. [[Special:Contributions/141.101.99.154|141.101.99.154]] 17:54, 1 September 2022 (UTC)&lt;br /&gt;
: the sound can be more clap like if you bend your hand upwards and keep it like that. Then loosen your fingers, and smash your upward lower arm to the front and back. My one armed brother taught me. It's handy (hehe) if one hand is holding a drink. [[Special:Contributions/172.68.51.204|172.68.51.204]] 07:36, 2 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
I have a problem with the &amp;quot;Bad things...&amp;quot; portion. ''If'' I was a bad person, then I would never pay for the universe, as I would be better off in the free version, where nothing bad would ever happen to me. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 19:17, 1 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
The &amp;quot;bad things&amp;quot; section is a bit bothersome: good things don't exist without bad things. Without bad things, good things are just...things. So maybe awareness of bad things is still extant in UniPro? That way, good things would still be at the upper end of a theoretical scale.&lt;br /&gt;
&lt;br /&gt;
But the subjectivity of badness is concerning in a bad-things-don't-happen realm. I reckon plenty of people who could spring for fifty bucks a month would list rum, Katharine Hepburn movies, gay people and Jews as bad things that therefore won't happen. If I stump up my Pro subscription, do I have to share the universe with these douchebags, or do we each get our own? And if it's the latter, how much of a douche must you be to be excluded from my universe? Can we differ a little and still coexist, or do we have to gel perfectly? And how would that ever happen...and would it be tolerable to live surrounded by my opinion-clones? Is this...is this the too-perfect Matrix v.1.0? Am I buying a ticket to a simulated utopia while my body atrophies?&lt;br /&gt;
You monster! Guards! Guards! Let me out.....&lt;br /&gt;
&lt;br /&gt;
[[Special:Contributions/172.71.178.35|172.71.178.35]] 23:09, 1 September 2022 (UTC)&lt;br /&gt;
Note that Universe Lite is marked as trademark, Universe Standard as a registered trademark, and Universe Pro as...BOTH. This is a joke; more is better, esp. in lists of features. But there's no point in claiming a mark is both a trademark and a registered trademark.&lt;br /&gt;
&lt;br /&gt;
How to clap with one hand: https://www.youtube.com/watch?v=qwoq3QBaQAY [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 04:38, 2 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
If a tree falls in a forest and there's no one there to hear it, then there is NO SOUND. The act of the tree falling will create vibrations in the air, but those vibrations only become 'sound' when they impact on a tympanic membrane (such as an eardrum) that is connected to a brain. Sound happens in your head, folks. Of course, in practice, the likelihood of a tree falling in an area that contains NO tympanic membranes at all is impossible given the abundance of miniature scaled life on Earth. That said, we have no idea whether insects actually perceive those air vibrations as 'sound' in the same way that humans do - the fairy fly, for example, is so small that it can 'swim' through air rather than flying, so probably perceives sound waves the same way that humans experience ocean waves.&lt;br /&gt;
&amp;lt;-----Pish-Posh. Sound happens regardless of aby tympanic membranes. Sound: noun 1. vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear. The definition is CAN be heard, not ARE heard. Sound vibrations cause MANY things to happen besides vibrating tympanic membranes, and it's STILL SOUND.[[Special:Contributions/172.70.100.60|172.70.100.60]] 11:47, 2 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
[[User:MarquisOfCarrabass|MarquisOfCarrabass]] ([[User talk:MarquisOfCarrabass|talk]]) 05:50, 2 September 2022 (UTC)&lt;br /&gt;
&lt;br /&gt;
We should do a comparison of universe standard vs our universe see if that's what we're doing [[User:Mushrooms|Mushrooms]] ([[User talk:Mushrooms|talk]]) 08:13, 2 September 2022 (UTC)&lt;br /&gt;
:...hang on, I already downloaded a crack to repatch the executables to get around the pesky copy protection/licence-key manager. The patcher utility says it might take some time, and I've had to give it superuser access to the entire system for some reason, so it might be a good idea to save your current session and let it do its job before messing about in the menus or we might find unexpected results! [[Special:Contributions/172.70.85.5|172.70.85.5]] 11:01, 2 September 2022 (UTC)&lt;br /&gt;
:I looked in the leaked payment notes, and found that biblicalGod31, the current payer, refused to pay 2 geomagnetic reversals ago, so our subscription got demoted to standard. Looking in the End God License Agreement, it seems that next geomagnetic reversal we will be demoted to lite. (Sorry if I didn't do humor well). [[Special:Contributions/172.70.126.11|172.70.126.11]] 13:38, 2 September 2022 (UTC)&lt;/div&gt;</summary>
		<author><name>172.70.126.11</name></author>	</entry>

	</feed>