Carl Sagan on the Brilliance of Ancient Greek Scientist Eratosthenes - GreekReporter.com
Carl Sagan on the Brilliance of Ancient Greek Scientist Eratosthe…
3 months ago
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Carl Sagan Explains How Eratosthenes Knew the Earth Was Curved Over 2,200 Years Ago
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twistedsifter.com
41K views · 1.4K reactions | A wonderful clip of humanist and cosmologist, Carl Sagan, on the Greek Polymath, Eratosthenes, and his endeavour to measure the circumference of the Earth. In doing so, Eratosthenes proves the Earth's curvature, over 2200 years ago. | Humanists UK | Facebook
2:14
41K views · 1.4K reactions | A wonderful clip of humanist and co…
41.5K views3 weeks ago
FacebookHumanists UK
3.7M views · 58K reactions | Carl Sagan describes how the ancient Greeks knew that the Earth was round. Aristotle used the round shadow of Earth on the moon during eclipses as evidence, while Eratosthenes measured the Earth’s circumference using the differences in shadow angles at two locations in Egypt. | History In Pictures | Facebook
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3.7M views · 58K reactions | Carl Sagan describes how the ancient …
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FacebookHistory In Pictures
Carl Sagan on ancient Greek mathematician Eratosthenes.
Carl Sagan on ancient Greek mathematician Eratosthenes.
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wimp.com
28K views · 237 reactions | This video shows Carl Sagan explaining Eratosthenes' Experiment, in which he was able to estimate with precision the size of planet Earth about 23 centuries ago. Credit: Cosmos. | Ceres Science | Facebook
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28K views · 237 reactions | This video shows Carl Sagan explainin…
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FacebookCeres Science
How an ancient polymath first calculated Earth’s size, as told by Carl Sagan | Aeon Videos
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