http://skeptics.stackexchange.com/questions/453/did-people-think-the-earth-was-flat
My favourite bit from this is
Eratosthenes (276–195 BCE) is famous, among other things, for calculating the circumference of the Earth
@Emyr started
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http://skeptics.stackexchange.com/questions/453/did-people-think-the-earth-was-flat
My favourite bit from this is