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disguy_ovahea , 5 hours ago Eratosthenes did it for the cost of paying a man to count his steps from one city to another. He was accurate within 1% of the Earth’s circumference. en.wikipedia.org/wiki/Eratosthenes
Eratosthenes did it for the cost of paying a man to count his steps from one city to another.
He was accurate within 1% of the Earth’s circumference.
en.wikipedia.org/wiki/Eratosthenes