Who is Eratosthenes? Life, Biography & Discoveries of Eratosthenes
Who is Eratosthenes? Life, Biography & Discoveries of Eratos…
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Eratosthenes (276-195 BC)
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1.5M views · 43K reactions | About 2200 years ago, Eratosthenes, a Greek librarian in Alexandria, Egypt, determined the Earth's circumference – and in doing so proved the curvature of the Earth – using 'sticks, eyes, feet.... plus a zest for experiments'. Carl Sagan, eminent cosmologist and humanist, at his finest.  | Humanists UK | Facebook
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