Archive for October 2013

The World Was Never Flat

Raise your hand if you were taught that Columbus proved to doubters that the earth was round. Yeah, me too. Our teachers were wrong. By the 5th century BC at the latest, the Greeks knew the earth was spherical. By 200 BC, Eratosthenes of Cyrene had made a pretty good estimate of its circumference using some creative means worth reading about here. Even after the fall of Greece and then […]

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