Cosmos - Eratosthenes calculates Earths circumference

Posted by MassYoutubeUploader on May. 29, 2009

In the 3rd century BCE, Eratosthenes calculated the circumference of the Earth to high precision. Further Reading: en.wikipedia.org This is a short segment from the series Cosmos by the late Carl Sagan. The most poetic popularizer of science in the 20th century. If you have never seen Cosmos, I strongly recommend it. Its full of great stories like this one. It is available on DVD, in 7 subtitle languages. Purchase links are below. www.carlsagan.com shopping.discovery.com www.amazon.com ...

Categories How To

Tags carl, cosmos, eratosthenes, gravitationalist, sagan

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