What Archimedes Did Two Thousand Years Before Newton
He used balance points to discover the volumes of curved solids, then proved them with strict geometry. The Greeks called it forbidden. He called it the Method.
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Eratosthenes
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The Librarian Who Measured the Earth With a Shadow
Around 240 BC the chief librarian at Alexandria measured the planet's circumference using two shadows and a piece of arithmetic. He was off by about two percent.
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