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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://poa.st/objects/38d54c9e-865f-46fb-8217-1736f64e139c">Wolfgirl in Wheatfield (wgiwf@poa.st)'s status on Monday, 01-Sep-2025 16:23:33 JST</a><a href="https://poa.st/users/wgiwf" title="wgiwf@poa.st"><img src="https://gnusocial.jp/avatar/5764-48-20220816121201.webp" width="48" height="48" alt="Wolfgirl in Wheatfield" style="position: absolute; left: 0; top: 0;">Wolfgirl in Wheatfield</a><div><a href="https://poa.st/objects/78e16cfb-354a-4b2f-9431-11f7840b43cb" rel="in-reply-to">in reply to</a><ul><li><li><a href="https://gnusocial.jp/user/3911" title="eee@poa.st">eee</a></li><li><a href="https://gnusocial.jp/user/5764" title="wgiwf@poa.st">Wolfgirl in Wheatfield</a></li></ul></div></section><article><a href="https://poa.st/users/EdBoatConnoisseur">@EdBoatConnoisseur</a> <a href="https://poa.st/users/eee">@eee</a> <a href="https://www.youtube.com/watch?v=Mw30CgaXiQw">https://www.youtube.com/watch?v=Mw30CgaXiQw</a></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/5571548#notice-10938641">In conversation</a><time datetime="2025-09-01T16:23:33+09:00" title="Monday, 01-Sep-2025 16:23:33 JST">about 10 months ago</time> <span>from <span><a href="https://poa.st/objects/38d54c9e-865f-46fb-8217-1736f64e139c" rel="external" title="Sent from poa.st via ActivityPub">poa.st</a></span></span><a href="https://poa.st/objects/38d54c9e-865f-46fb-8217-1736f64e139c">permalink</a><h4>Attachments</h4><ol><li><article><header><img height="128" width="128" src="https://gnusocial.jp/thumbnail/5147827?w=128&amp;h=128"><h5><a href="https://www.youtube.com/watch?v=Mw30CgaXiQw">How Eratosthenes calculated the Earth's circumference</a></h5><div> from <span>Business Insider</span></div></header><div>In the mid-20th century we began launching satellites into space that would help us determine the exact circumference of the Earth: 40,030 km. But over 2000 ...</div><footer></footer></article></li></ol></footer></blockquote>

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Wolfgirl in Wheatfield (wgiwf@poa.st)'s status on Monday, 01-Sep-2025 16:23:33 JSTWolfgirl in Wheatfield
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@EdBoatConnoisseur @eee https://www.youtube.com/watch?v=Mw30CgaXiQw
In conversationabout 10 months ago from poa.stpermalink
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1. How Eratosthenes calculated the Earth's circumference
  from Business Insider
  In the mid-20th century we began launching satellites into space that would help us determine the exact circumference of the Earth: 40,030 km. But over 2000 ...

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