Quote:
Originally posted by CET
The grecians got the idea of a round earth from the egyptians, who were able to measure the earth's circumfrence from a well at the equator and the length of a shadow cast by a pole. The measurement wasn't exact, but it was pretty damn close.
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Erastothenes did that. He was Greek but lived in Alexandria which was technically Greek at the time because it has been conquered by Alexander - hence the name. Did an Egyptian do this before him?