Carl Sagan on the Brilliance of Ancient Greek Scientist Eratosthenes - GreekReporter.com
Carl Sagan on the Brilliance of Ancient Greek Scientist Eratosthe…
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Carl Sagan on ancient Greek mathematician Eratosthenes.
Carl Sagan on ancient Greek mathematician Eratosthenes.
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This is how Ancient Greeks knew the Earth wasn't flat
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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
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