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		<id>https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=2773%3A_Planetary_Scientist</id>
		<title>2773: Planetary Scientist - Revision history</title>
		<link rel="self" type="application/atom+xml" href="https://www.explainxkcd.com/wiki/index.php?action=history&amp;feed=atom&amp;title=2773%3A_Planetary_Scientist"/>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;action=history"/>
		<updated>2026-05-22T19:13:22Z</updated>
		<subtitle>Revision history for this page on the wiki</subtitle>
		<generator>MediaWiki 1.30.0</generator>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=401441&amp;oldid=prev</id>
		<title>Lp0 on fire: removed Category:Science using HotCat</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=401441&amp;oldid=prev"/>
				<updated>2025-12-13T11:38:51Z</updated>
		
		<summary type="html">&lt;p&gt;removed &lt;a href=&quot;/wiki/index.php/Category:Science&quot; title=&quot;Category:Science&quot;&gt;Category:Science&lt;/a&gt; using &lt;a href=&quot;http://commons.wikimedia.org/wiki/Help:Gadget-HotCat&quot; class=&quot;extiw&quot; title=&quot;commons:Help:Gadget-HotCat&quot;&gt;HotCat&lt;/a&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 11:38, 13 December 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l32&quot; &gt;Line 32:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 32:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Comics featuring Cueball]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Comics featuring Cueball]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Comics featuring Ponytail]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Comics featuring Ponytail]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Science]]&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Astronomy]]&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Astronomy]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Lp0 on fire</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=333523&amp;oldid=prev</id>
		<title>172.71.242.5: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=333523&amp;oldid=prev"/>
				<updated>2024-01-24T21:12:22Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 21:12, 24 January 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l16&quot; &gt;Line 16:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, the {{w|moons of Jupiter}} and those of other {{w|Jovian planets|large planets}}, like [https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, the {{w|moons of Jupiter}} and those of other {{w|Jovian planets|large planets}}, like [https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;'&lt;/ins&gt;mattress tectonics&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;' &lt;/ins&gt;as Ponytail suggests&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;; though this might well be a humorous reference to sexual activity, which often takes place on beds and frequently causes fabric rumpling, as has been previously referenced in xkcd&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.242.5</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=333416&amp;oldid=prev</id>
		<title>172.71.178.167: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=333416&amp;oldid=prev"/>
				<updated>2024-01-23T18:04:30Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 18:04, 23 January 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l16&quot; &gt;Line 16:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 16:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, the {{w|moons of Jupiter}} and those of other {{w|Jovian planets|large planets}}, like [https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, the {{w|moons of Jupiter}} and those of other {{w|Jovian planets|large planets}}, like [https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;plate &lt;/del&gt;tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;plate &lt;/del&gt;tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.178.167</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=316501&amp;oldid=prev</id>
		<title>162.158.186.245: /* Explanation */ done</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=316501&amp;oldid=prev"/>
				<updated>2023-06-29T00:24:00Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; done&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 00:24, 29 June 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;{{incomplete|Created by a BOT THAT'S PROBABLY FULL OF WATER - Please change this comment when editing this page. Do NOT delete this tag full of water too soon.}}&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>162.158.186.245</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=314785&amp;oldid=prev</id>
		<title>172.70.130.202 at 10:57, 2 June 2023</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=314785&amp;oldid=prev"/>
				<updated>2023-06-02T10:57:51Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 10:57, 2 June 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l10&quot; &gt;Line 10:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by a BOT THAT'S PROBABLY FULL OF WATER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by a BOT THAT'S PROBABLY FULL OF WATER - Please change this comment when editing this page. Do NOT delete this tag &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;full of water &lt;/ins&gt;too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.130.202</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=313023&amp;oldid=prev</id>
		<title>141.101.98.100: /* Explanation */ Flipping the strange situation where we had a link about planets (given words relating to moons) and another for a page abut moons (actually worded in the context of a planet). Kept all links. tried for more apt phrasing.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=313023&amp;oldid=prev"/>
				<updated>2023-05-12T21:16:59Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; Flipping the strange situation where we had a link about planets (given words relating to moons) and another for a page abut moons (actually worded in the context of a planet). Kept all links. tried for more apt phrasing.&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 21:16, 12 May 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l15&quot; &gt;Line 15:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 15:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, [[Cueball]], begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, [[Cueball]], begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;and &lt;/del&gt;{{w|&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Jovian planets|Jovian&lt;/del&gt;}} &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;moons such as &lt;/del&gt;those of {{w|&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Moons of Jupiter&lt;/del&gt;|&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Jupiter&lt;/del&gt;}} &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;and &lt;/del&gt;[https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;the &lt;/ins&gt;{{w|&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;moons of Jupiter&lt;/ins&gt;}} &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;and &lt;/ins&gt;those of &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;other &lt;/ins&gt;{{w|&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Jovian planets&lt;/ins&gt;|&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;large planets&lt;/ins&gt;}}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, like &lt;/ins&gt;[https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus].&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>141.101.98.100</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=313011&amp;oldid=prev</id>
		<title>172.69.22.128: /* Explanation */ all the giant planets' moons have this issue</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=313011&amp;oldid=prev"/>
				<updated>2023-05-12T20:00:55Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; all the giant planets&amp;#039; moons have this issue&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:00, 12 May 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l15&quot; &gt;Line 15:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 15:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, [[Cueball]], begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, [[Cueball]], begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and {{w|Moons of Jupiter|Jupiter&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;'s moons&lt;/del&gt;}}.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;{{w|Jovian planets|Jovian}} moons such as those of &lt;/ins&gt;{{w|Moons of Jupiter|Jupiter}} &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;and [https://www.nasa.gov/feature/jpl/new-study-of-uranus-large-moons-shows-4-may-hold-water Uranus]&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed, or just not {{w|Bed-making|making the bed}} carefully enough, and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.69.22.128</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312901&amp;oldid=prev</id>
		<title>172.71.178.206: /* Explanation */ Just to prove that the autolinkbot, apparently being used by an IP, is clearly shirking/not operating on legitimate targets.</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312901&amp;oldid=prev"/>
				<updated>2023-05-11T21:37:14Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; Just to prove that the autolinkbot, apparently being used by an IP, is clearly shirking/not operating on legitimate targets.&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 21:37, 11 May 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l13&quot; &gt;Line 13:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 13:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Ponytail]], a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, Cueball, begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[&lt;/ins&gt;Cueball&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;]]&lt;/ins&gt;, begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and {{w|Moons of Jupiter|Jupiter's moons}}.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and {{w|Moons of Jupiter|Jupiter's moons}}.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.71.178.206</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312849&amp;oldid=prev</id>
		<title>162.158.22.234: /* Explanation */</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312849&amp;oldid=prev"/>
				<updated>2023-05-11T08:08:18Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 08:08, 11 May 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l11&quot; &gt;Line 11:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 11:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Explanation==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by a BOT THAT'S PROBABLY FULL OF WATER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{incomplete|Created by a BOT THAT'S PROBABLY FULL OF WATER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail, a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[&lt;/ins&gt;Ponytail&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;]]&lt;/ins&gt;, a {{w|planetary scientist}}, is shopping at a mattress store. The store clerk seems to be giving her a guided tour of various models of mattress, including the most popular model shown in the comic.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, Cueball, begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Ponytail asks if the bed is a {{w|waterbed}}, a type of mattress which is filled with water instead of the usual solid material. The clerk, Cueball, begins to explain to her that it's actually a hybrid made of foam (among other things, maybe water, but it's usually the terminology used for a significantly hi-tech {{w|Memory foam|foam}}/{{w|Mattress coil|spring}} combination construction, rather than just the former or the latter with or without minor padding), but Ponytail interrupts him, saying that she believes it actually is a waterbed based on &amp;quot;how it moves.&amp;quot;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>162.158.22.234</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312789&amp;oldid=prev</id>
		<title>172.70.85.67: /* Explanation */ Lack of care with the hospital-corners?</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=2773:_Planetary_Scientist&amp;diff=312789&amp;oldid=prev"/>
				<updated>2023-05-10T20:30:42Z</updated>
		
		<summary type="html">&lt;p&gt;‎&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Explanation: &lt;/span&gt; Lack of care with the hospital-corners?&lt;/span&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr style=&quot;vertical-align: top;&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revision as of 20:30, 10 May 2023&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l17&quot; &gt;Line 17:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 17:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and {{w|Moons of Jupiter|Jupiter's moons}}.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The comic caption reveals the punchline, that because {{w|planetary oceanography|subsurface oceans}} have become so ubiquitous in the study of planetary science (especially because they serve as an indicator for the potential for life on another planet), Ponytail is starting to see them ''everywhere'', even in clearly unrelated contexts such as mattresses. Here, the water in the waterbed is analogous to a planet's subsurface ocean (i.e. both being water underneath a solid outer layer). Alternatively, the comic could be commenting on the difficulty of discerning {{w|hydroxyl}} spectra of water absorbed in mineral {{w|hydrate}}s from free water in remote detection studies of the {{w|Lunar water|Moon}}, asteroids, and {{w|Moons of Jupiter|Jupiter's moons}}.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The title text goes in a similar direction with planetary science, having Ponytail tell the now-confused clerk that the rumpled fabric on one part of the bed seems like &amp;quot;evidence of ongoing tectonic activity,&amp;quot; referencing {{w|plate tectonics}} and how protruding geographic formations (such as mountains) are formed through it. Again, the punchline is the relentless penetration of Ponytail's occupation into her everyday life. Typically, however, rumpled fabric may be caused by someone pushing the fabric on a bed&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;, or just not {{w|Bed-making|making the bed}} carefully enough, &lt;/ins&gt;and not mattress plate tectonics as Ponytail suggests.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==Transcript==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>172.70.85.67</name></author>	</entry>

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