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384: The Drake Equation - Revision history
2026-05-22T22:21:12Z
Revision history for this page on the wiki
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208.59.176.206: /* Transcript */
2026-01-27T01:01:27Z
<p><span dir="auto"><span class="autocomment">Transcript</span></span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 01:01, 27 January 2026</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l26" >Line 26:</td>
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<tr><td class='diff-marker'> </td><td style="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;"><div>==Transcript==</div></td><td class='diff-marker'> </td><td style="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;"><div>==Transcript==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>:The Drake Equation:</div></td><td class='diff-marker'> </td><td style="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;"><div>:The Drake Equation:</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:[An equation is shown with four of the variables indicated in red. Two of the variables shown in red have explanations above the equation and the other two have explanations below the equation. The other variables are shown in black.]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>:N = R* f<sub>p</sub> n<sub>e</sub> f<sub>l</sub> f<sub>i</sub> f<sub>c</sub> L B<sub>s</sub></div></td><td class='diff-marker'> </td><td style="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;"><div>:N = R* f<sub>p</sub> n<sub>e</sub> f<sub>l</sub> f<sub>i</sub> f<sub>c</sub> L B<sub>s</sub></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:[Variables explained above the equation:]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>:N: Number of communicating civilizations in our galaxy</div></td><td class='diff-marker'> </td><td style="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;"><div>:N: Number of communicating civilizations in our galaxy</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:f<sub>i</sub>: Probability that life on a planet becomes intelligent</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">:[Variables explained below the equation:]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>:n<sub>e</sub>: Number of life-supporting planets per solar system</div></td><td class='diff-marker'> </td><td style="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;"><div>:n<sub>e</sub>: Number of life-supporting planets per solar system</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="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;"><div><del style="font-weight: bold; text-decoration: none;">:f<sub>i</sub>: Probability that life on a planet becomes intelligent</del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="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;"><div>:B<sub>s</sub>: Amount of bullshit you're willing to buy from Frank Drake</div></td><td class='diff-marker'> </td><td style="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;"><div>:B<sub>s</sub>: Amount of bullshit you're willing to buy from Frank Drake</div></td></tr>
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208.59.176.206
https://www.explainxkcd.com/wiki/index.php?title=384:_The_Drake_Equation&diff=401663&oldid=prev
Lettherebedarklight: /* Transcript */ add Category:Comics with a Spanish translation
2025-12-15T08:59:39Z
<p><span dir="auto"><span class="autocomment">Transcript: </span> add <a href="/wiki/index.php/Category:Comics_with_a_Spanish_translation" title="Category:Comics with a Spanish translation">Category:Comics with a Spanish translation</a></span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 08:59, 15 December 2025</td>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="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;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Comics with a Spanish translation]]</ins></div></td></tr>
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Lettherebedarklight
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Theusaf: Reverted edits by Donald Trump (talk) to last revision by CRLF
2022-05-26T19:58:15Z
<p>Reverted edits by <a href="/wiki/index.php/Special:Contributions/Donald_Trump" title="Special:Contributions/Donald Trump">Donald Trump</a> (<a href="/wiki/index.php?title=User_talk:Donald_Trump&action=edit&redlink=1" class="new" title="User talk:Donald Trump (page does not exist)">talk</a>) to last revision by <a href="/wiki/index.php/User:CRLF" title="User:CRLF">CRLF</a></p>
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Theusaf
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Donald Trump: Reverted edit by anti-crap user
2022-05-26T19:04:22Z
<p>Reverted edit by anti-crap user</p>
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CRLF: Reverted vandalism with User:CRLF/OneClickUndo.js
2022-05-26T17:52:26Z
<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p>
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CRLF
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Donald Trump: Reverted edit by anti-crap user
2022-05-26T17:24:08Z
<p>Reverted edit by anti-crap user</p>
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CRLF: Reverted vandalism with User:CRLF/OneClickUndo.js
2022-05-23T18:46:14Z
<p>Reverted vandalism with <a href="/wiki/index.php/User:CRLF/OneClickUndo.js" title="User:CRLF/OneClickUndo.js">User:CRLF/OneClickUndo.js</a></p>
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Xray Kilo Charlie Delta: haha your js cant stop my js
2022-05-23T18:16:32Z
<p>haha your js cant stop my js</p>
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Theusaf: Reverted edits by 👖🔥 (talk) to last revision by Jacky720
2022-05-11T18:44:00Z
<p>Reverted edits by <a href="/wiki/index.php/Special:Contributions/%F0%9F%91%96%F0%9F%94%A5" title="Special:Contributions/👖🔥">👖🔥</a> (<a href="/wiki/index.php?title=User_talk:%F0%9F%91%96%F0%9F%94%A5&action=edit&redlink=1" class="new" title="User talk:👖🔥 (page does not exist)">talk</a>) to last revision by <a href="/wiki/index.php/User:Jacky720" title="User:Jacky720">Jacky720</a></p>
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Theusaf
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👖🔥 at 17:50, 11 May 2022
2022-05-11T17:50:43Z
<p></p>
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