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		<id>https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&amp;feedformat=atom&amp;user=172.71.26.127</id>
		<title>explain xkcd - User contributions [en]</title>
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		<updated>2026-05-25T08:01:44Z</updated>
		<subtitle>User contributions</subtitle>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:2873:_Supersymmetry&amp;diff=331581</id>
		<title>Talk:2873: Supersymmetry</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:2873:_Supersymmetry&amp;diff=331581"/>
				<updated>2023-12-28T16:03:47Z</updated>
		
		<summary type="html">&lt;p&gt;172.71.26.127: &lt;/p&gt;
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&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;
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Ah, good, I was ''just'' about to tell people (on 2872's Talk page) that there was a new one... (And that we obviously need to prod the theusafBOT.)  Currently, [[2872: Hydrothermal Vents]] doesn't have the 'Next' links to here, but (from last comic's experience) it might just be a matter of nudging its server-side cache a bit. I'll try the tricks I tried yesterday. [[Special:Contributions/141.101.99.101|141.101.99.101]] 20:08, 27 December 2023 (UTC)&lt;br /&gt;
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Too bad the franchise has never introduced a Weach character (there's a couple of witches). A game with Peach as the main protagonist would be interesting, and it would give us a convenient positron. [[Special:Contributions/172.71.26.135|172.71.26.135]] 20:56, 27 December 2023 (UTC)&lt;br /&gt;
:If they made Weach, people would start asking for Wowser. [[Special:Contributions/108.162.245.202|108.162.245.202]] 21:53, 27 December 2023 (UTC)&lt;br /&gt;
::Isn't that just Bowyer? [[Special:Contributions/172.70.131.37|172.70.131.37]] 21:59, 27 December 2023 (UTC)&lt;br /&gt;
:There is a Princess Peach game, Super Princess Peach. [[Special:Contributions/172.68.174.237|172.68.174.237]] 14:06, 28 December 2023 (UTC)&lt;br /&gt;
I think the mouse over text references mariokart? We know that Randall plays... [[Special:Contributions/172.70.200.144|172.70.200.144]] 00:43, 28 December 2023 (UTC)&lt;br /&gt;
: Absolutely. It's directly referring to the track ''GCN Baby Park'', found in ''{{w|Mario Kart: Double Dash|Double Dash}}'', ''{{w|Mario Kart 8|MK8}}'', and ''{{w|Mario Kart 8 Deluxe|MK8DX}}''. on the other hand, it also references ''The Legend of Zelda: Majora's Mask'' (which is already included in the explanation) &amp;lt;span style=&amp;quot;font-family: 'Comic Sans MS'&amp;quot;&amp;gt;[[User:SomeoneIGuess|someone, i guess]]&amp;lt;sup&amp;gt;([[User talk:SomeoneIGuess|talk i guess]]&amp;amp;#124;[[Special:Contributions/SomeoneIGuess|le edit list]])&amp;lt;/sup&amp;gt;&amp;lt;/span&amp;gt;  02:21, 28 December 2023 (UTC)&lt;br /&gt;
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I'm not that familiar with Mario or particle physics. What would the anti-Peach particle be? Bowsette? [[User:GreatWyrmGold|GreatWyrmGold]] ([[User talk:GreatWyrmGold|talk]]) 00:59, 28 December 2023 (UTC)&lt;br /&gt;
:I'm fairly well acquainted with particle physics but not at all with anything Mario (post Donkey Kong, at least). I wish now I'd formatted my own initial explanation with unordered-list (*) or tabular format of the referenced-particles side of this parody when I first visited (141.101.99.101, 20:08, 27 December 2023) rather than the current stop-gap version, but would naturally want to have columns/continuation for the Marioland characters (of which I know too little, only that they exist and that Mario's evil 'twin' is Wario at some much later point in the franchise). Can we perhaps knock it into shape, or are too many editors on Christmas break/distracted by RL? I can still reformat it into a table, but I have less idea what the Mario columns need to leave space for than the other bits... [[Special:Contributions/172.69.194.14|172.69.194.14]] 12:37, 28 December 2023 (UTC)&lt;br /&gt;
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Clearly, he's referencing Wapeach. --[[Special:Contributions/162.158.74.118|162.158.74.118]] 10:35, 28 December 2023 (UTC)&lt;br /&gt;
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I'd suggest to prefix the explanation by explaining what a &amp;quot;Super Nintendo&amp;quot; is. I had to look it up in the other wiki to figure that the [https://en.wikipedia.org/wiki/Super_Nintendo_Entertainment_System SNES] (which I'm only familiar with by name) actually stands for &amp;quot;Super Nintendo&amp;quot;. [[User:Ralfoide|Ralfoide]] ([[User talk:Ralfoide|talk]]) 15:09, 28 December 2023 (UTC)&lt;br /&gt;
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Far out in the reaches of Zelda we find the legendary Tom Brier rendering a Zelda theme on the piano. https://www.youtube.com/watch?v=9dvF-Z7vPK0&lt;br /&gt;
[[Special:Contributions/172.71.26.127|172.71.26.127]] 16:03, 28 December 2023 (UTC)&lt;/div&gt;</summary>
		<author><name>172.71.26.127</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2719:_Hydrogen_Isotopes&amp;diff=304110</id>
		<title>2719: Hydrogen Isotopes</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2719:_Hydrogen_Isotopes&amp;diff=304110"/>
				<updated>2023-01-04T22:20:41Z</updated>
		
		<summary type="html">&lt;p&gt;172.71.26.127: /* Explanation */&lt;/p&gt;
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&lt;div&gt;{{comic&lt;br /&gt;
| number    = 2719&lt;br /&gt;
| date      = January 2, 2023&lt;br /&gt;
| title     = Hydrogen Isotopes&lt;br /&gt;
| image     = hydrogen_isotopes_2x.png&lt;br /&gt;
| imagesize = 442x250px&lt;br /&gt;
| noexpand  = true&lt;br /&gt;
| titletext = Oops, All Neutrons is also known as Neutral Quadrium, Nydnonen, and Goth Tritium.&lt;br /&gt;
}}&lt;br /&gt;
&lt;br /&gt;
==Explanation==&lt;br /&gt;
{{incomplete|Created by a BREAK ROOM DE BROGLIE MICROWAVE USER. Do NOT delete this tag too soon.}}&lt;br /&gt;
&lt;br /&gt;
{{W|Hydrogen}} is the simplest of the chemical atoms, usually consisting of an electron orbiting a lone proton, but with two other naturally occurring {{w|isotope}}s. This comic shows real and humorously fictional forms of hydrogen, generally depicted according the {{w|Discovery of the neutron#Proton–neutron model of the nucleus|Chadwick model}} of the atom; see [[2100: Models of the Atom]] for details.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
! &amp;quot;Isotope&amp;quot;&lt;br /&gt;
! Real?&lt;br /&gt;
! Description&lt;br /&gt;
|-&lt;br /&gt;
|Hydrogen&lt;br /&gt;
|Yes&lt;br /&gt;
|Hydrogen-1 is the most common isotope of hydrogen, with one proton and one electron, shown with the electron orbiting the proton. It is also known as protium.&lt;br /&gt;
|-&lt;br /&gt;
|Deuterium&lt;br /&gt;
|Yes&lt;br /&gt;
|{{w|Deuterium}} is the second most common isotope of hydrogen, with one electron and both a neutron and proton in its nucleus. About one of every 6,760 hydrogen atoms in seawater is deuterium. Its chemical symbol is D or [[2614: 2|&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;H]], and it's also called heavy hydrogen or hydrogen-2.&lt;br /&gt;
|-&lt;br /&gt;
|Tritium&lt;br /&gt;
|Yes&lt;br /&gt;
|{{w|Tritium}} is the third most common isotope of hydrogen, with an electron orbiting a nucleus of one proton and two neutrons, for an atomic mass of about three {{w|Dalton (unit)|daltons}}. It is radioactive with a half-life of about twelve years, and is very rare (but not as rare as unbound &amp;quot;instant hydrogen&amp;quot; neutrons.) It's also designated hydrogen-3.&lt;br /&gt;
|-&lt;br /&gt;
|Ium&lt;br /&gt;
|Only in the lab&lt;br /&gt;
|This is a {{w|free electron}} orbiting around nothing. In line with the naming of the heavier hydrogen isotopes (a prefix designating the number of {{w|nucleons}} is followed by the suffix &amp;quot;-ium&amp;quot;), the lack of a nucleus is designated here by the absence of a prefix.  A free electron will not circle around nothing.  It will, however, react to external electromagnetic fields; and when those fields are suitably configured, such as in a {{w|Penning trap}}, the electron can actually be confined to move &amp;quot;around nothing&amp;quot; in circles or other circulating orbits. &lt;br /&gt;
|-&lt;br /&gt;
|Wheelium&lt;br /&gt;
|No&lt;br /&gt;
|This fictional form consists of a proton, electron, and neutron orbiting around nothing, shaped similarly to a wheel. The neutron could bind to the proton, but will more likely {{w|Elastic_scattering#Nuclear particle physics|elastically scatter}} away.&lt;br /&gt;
|-&lt;br /&gt;
|Instant hydrogen (ready in 15 minutes)&lt;br /&gt;
|Yes, but rare[https://radioactivity.eu.com/phenomenon/neutronic_radiation]&lt;br /&gt;
|This is just a single neutron. An unbound neutron will decay into a proton, an electron, and an antineutrino, with a mean lifetime of just under fifteen minutes. The proton and electron ''can'' form into a hydrogen atom, but that [https://van.physics.illinois.edu/ask/listing/1207 only happens about four times in a million.] The name is likely a reference to &amp;quot;instant&amp;quot; food such as noodles which are reduced for convenience and can be quickly reconstituted.&lt;br /&gt;
|-&lt;br /&gt;
|Hydrogen (maximum strength)&lt;br /&gt;
|No&lt;br /&gt;
|This fictional isotope consists of a proton, an electron, and what appear to be at least 14 neutrons. This isotope's proton would not be bound to all the neutrons. It would immediately decay by {{w|Nuclear drip line|dripping}} most all of them away, producing a large amount of energy. &amp;quot;Maximum strength&amp;quot; may be a reference to over-the-counter medicines containing the largest quantity of active ingredients permitted.&lt;br /&gt;
|-&lt;br /&gt;
|Oops, All Neutrons&lt;br /&gt;
|Extremely unlikely&lt;br /&gt;
|This fictional form consists of four neutrons, with one orbiting around a group of three. As the existence of {{w|tetraneutron|tetraneutrons}} is still uncertain, their possible configurations are unknown; but considering the known fundamental forces, the depicted configuration is especially unlikely to support a bound state (the only long-range attractive force being gravity). The name is likely a reference to an American breakfast cereal called {{w|Cap'n Crunch#Variations|Oops! All Berries}}.&lt;br /&gt;
&lt;br /&gt;
The title text provides three other names: 1. &amp;quot;Neutral Quadrium&amp;quot;: {{w|Isotopes_of_hydrogen#Hydrogen-4|Quadrium}} is the extremely rare artificial isotope hydrogen-4, with a proton and three neutrons.[https://www.chem.ccu.edu.tw/~hu/Web_Lib/articles/Muonium+H2_Science_2011.pdf][https://www.lenr-canr.org/acrobat/GodesRcontrolled.pdf] The proton and electron have been replaced with neutrons. 2. &amp;quot;Nydnonen&amp;quot; is the word &amp;quot;hydrogen&amp;quot; with three consonants replaced by the letter 'n' so it has four of them representing the four neutrons. 3. &amp;quot;Goth Tritium&amp;quot;: All the particles in the depiction are black, resembling typical {{w|gothic fashion}}, and in the same configuration as the particles of tritium.&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
{{notice2|The Mountain View, California Public Library is hosting an online chat with [[Randall Munroe]] Tuesday, January 31 at 11am Pacific.&amp;lt;br/&amp;gt;[https://libraryc.org/mountainviewlibrary/22032 Register here to send your question(s) to the moderators.]|image=Crystal Project Agt announcements.png}} &amp;lt;!-- pending admin request to add blurb to sitenotice --&amp;gt;&lt;br /&gt;
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==Transcript==&lt;br /&gt;
:[Eight drawings of different versions of hydrogen atoms are shown. They are arranged in two rows of four. The depictions use the planetary model version with for instance a negative electron (with a &amp;quot;-&amp;quot; written inside a small circle) orbiting a positive proton (with a &amp;quot;+&amp;quot; written inside a larger circle) and a black neutron depicted as a circle of the same size as the neutron, as in the second atom - Deuterium. Each has a label underneath. Here, they are listed in reading order:]&lt;br /&gt;
:[An electron orbiting a proton:] &lt;br /&gt;
:Hydrogen&lt;br /&gt;
&lt;br /&gt;
:[An electron orbiting a proton connected with a neutron:] &lt;br /&gt;
:Deuterium&lt;br /&gt;
&lt;br /&gt;
:[An electron orbiting a proton connected with two neutrons, so they form a triangle:] &lt;br /&gt;
:Tritium&lt;br /&gt;
&lt;br /&gt;
:[An electron orbiting nothing:]&lt;br /&gt;
:Ium&lt;br /&gt;
&lt;br /&gt;
:[An electron a proton and a neutron all orbiting on the same circle around nothing. They are placed equidistant from each other forming a large triangle:]&lt;br /&gt;
:Wheelium&lt;br /&gt;
&lt;br /&gt;
:[A single neutron:] &lt;br /&gt;
:Instant Hydrogen (ready in 15 minutes)&lt;br /&gt;
&lt;br /&gt;
:[An electron orbiting a proton connected with many neutrons, 13 visible with six  touching the proton which are in front. Four more are close to those six and mostly shown and then three are only just visible behind the others. Looking closely there are also two smaller dots near the edge indicating at least two more, for 15 that can be seen. And several more would be behind the visible neutrons if this forms a spherical shape. The electrons orbit just barely goes around the outer neutrons:] &lt;br /&gt;
:Hydrogen (maximum strength)&lt;br /&gt;
&lt;br /&gt;
:[Four neutrons arranged like the particles in Tritium with a neutron orbiting a triangle of neutrons.]&lt;br /&gt;
:Oops, all neutrons&lt;br /&gt;
&lt;br /&gt;
{{comic discussion}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Charts]]&lt;br /&gt;
[[Category:Physics]]&lt;br /&gt;
[[Category:Chemistry]]&lt;/div&gt;</summary>
		<author><name>172.71.26.127</name></author>	</entry>

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