Do you know how to measure the diameter of the earth? No? Then you’re less advanced than they were in 230 BC. You’re basically a Neanderthal with access to a microwave. Find out how to fix that in ...
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Over 2,200 years ago, Eratosthenes calculated the circumference of Earth, and his math was ...
Impressive, right?
Students in Greece will revive Eratosthenes' calculation of the Earth’s radius and circumference, a remarkable experiment in ...
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