Post #3496279

Explanation: Eratosthenes was a Greek polymath who lived in North Africa in the 3rd century BCE. An immensely accomplished and intelligent man, one of his most resounding achievements was to measure the size of the earth. While Greek philosophy already considered the world to be spherical, Eratosthenes managed to use extremely simple tools, with an understanding of mathematical principles, light, shadow, and geometry, to calculate the size of the earth to within ~10% of its actual value, as measured by modern tools! Flat Earther lunatics in the modern day have attempted to re-perform his experiment, expecting a different result from the OBVIOUS flatness of the earth. It never works out for them. Curiously, it rarely changes their minds, either.