[url=https://www.bungie.net/en/Forum/Post/196991846/0/0/1]As many of you are aware, I have intuitively demonstrated the reality of a flat earth[/url]. One of the claims regularly put forth against the flat earth model, is the fanciful story of Eratosthenes. Eratosthenes was Greek, and lived in the Egyptian city of Alexandria. He performed a famous experiment, through which he erroneously concluded that the world is round. By observing shadows cast by the sun at two different locations, on the same day of the year, he concluded through a clever use of geometry the supposed diameter of a round earth. This video (though admittedly in error) by Carl Sagan nicely summarizes Eratosthenes infamous experiment: https://www.youtube.com/watch?v=mUxmCXSmtVo However, a quick look at my above gif quickly dispels any doubts that the shadow experiment may have raised: Eratosthenes assumes that the sun is a distant object. In reality, the sun is much smaller and very close (comparatively) to the surface of earth. The sun, acting much like a spot light (note above gif) circles above the surface of the earth. If we imagine Sagan's cardboard with two sticks perpendicularly attached, it is easy to see that the earth is flat: shine a spot light (the sun) directly above point "A" and it will cast no shadow. However, nearby point "B", as it is not directly beneath the light, will cast a distinct shadow. This obviously shows that the "diameter" of the earth, in reality, is an illusion based on the orbital patterns of the sun.