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A comment on What is Enlightenment? (1784). Parent comment

Re:What is Enlightenment? (1784) by LambdaComplex on Sunday June 10, 2018 @02:38PM (#17279511)
"This video contains content from eOne UGC, who has blocked it in your country on copyright grounds."
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Re:What is Enlightenment? (1784) by latexr on Monday June 11, 2018 @09:04AM (#17283827)
It’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

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