Greek philosopher who was a Pythagorean, but not very mystical. He believed Earth to be the fundamental element of the universe. He also deduced by noting that seashells are sometimes found on mountain tops, that the physical arrangement of the Earth changes with time. To him is attributed the quote "The gods did not reveal from the beginning All things to us; but in the course of time Through seeking, men find that which is better. But as for certain truth, no man has known it. Nor will he know it."

Additional biographies: Bonn, Greek and Roman Science and Technology