Biro Bela on Nostr: Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated ...
Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated its circumference over 2,000 years ago.
Biro Bela
npub1gl…6d3sz
2025-05-07 00:32:02
Author Public Key
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2025-05-07 00:32:02Event JSON
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