In the 3rd century BCE, Eratosthenes calculated the circumference of the Earth to high precision.
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Carl Sagan
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Updated: 1 decade 6 years 10 months 3 weeks ago
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For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
Carl Sagan
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1 decade 7 years 6 months ago • 6,699 views