Nov 23, 2020

How the Ancient Greeks Figured Out the Earth wasn’t Flat (and solved the circumference too)

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Carl Sagan explains how the ancient Greeks knew the Earth was round and calculated its circumference over 2,000 years ago. This clip is an excerpt from episode 1 of Carl Sagan’s “Cosmos”.



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carl sagan · cosmos · earth · explainer · HISTORY · mathematics · science · top · tv shows

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