Uh, what? They knew the earth was a sphere: https://en.wikipedia.org/wiki/Eratosthenes#Measurement_of_the_Earth.27s_circumference https://en.wikipedia.org/wiki

Uh, what? They knew the earth was a sphere: https://en.wikipedia.org/wiki/Eratosthenes#Measurement_of_the_Earth.27s_circumference https://en.wikipedia.org/wiki/Eratosthenes#Measurement_of_th...