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"This video contains content from eOne UGC, who has blocked it in your country on copyright grounds."
by LambdaComplex 8y ago
"This video contains content from eOne UGC, who has blocked it in your country on copyright grounds."
- latexr 8y agoIt’s a clip from Carl Sagan’s “Cosmos: A Personal Voyage”[1]. Searching for “Eratosthenes” returns tons of other videos that explain the experiment. [1]: https://en.wikipedia.org/wiki/Cosmos:_A_Personal_Voyage https://en.wikipedia.org/wiki/Cosmos:_A_Personal_Voyage