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Blog Archive for rmartin during September 2003

Twenty-five hundred years ago Aristotle came up with an explanation for the common observations that rocks fall and smoke rises. His idea was simple and elegant. His formulation was clever, and his arguments were convincing. He was dead wrong. Aristotle's idea was that there were five elements: Earth, Water, Air, Fire, and Aether in that order. These four elements formed five spherical...