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Based on the shadows that the Earth created on the Moon during an eclipse the early philosopher Aristotle suggested the Earth to be round and mentioned it in his writings. The first
http://answers.ask.com/Society/History/who_discove...
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Believe it not, people once thought the earth to be flat and that a person could actually fall off it they walked to the edge of the earth. However it was the Pythagorean's who were
http://answers.ask.com/Science/Other/who_proved_th...
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Christopher Columbus discovered the earth was round when he rode on his boat and he did not fall off of the edge of the cliff. I am happy that the world is round.
http://answers.ask.com/Science/Other/how_do_we_kno...
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The Earth is not perfectly round for at least three reasons. The first reason is that the Earth is somewhat flexible so it bulges outwards at the equator because of its rotation.
http://wiki.answers.com/Q/Why_is_the_earth_not_per...
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