ANAXIMANDERMilitos, 611 - 546 B.C.
A famous wise man of Ancient Greece, possibly a pupil of his fellow citizen Thales. According to some ancient writers, Anaximandrus invented the solar clock, using the sun and a shadow to calculate time. As Herodotus mentions that this instrument came to Greece from Babylon, it is a possibility than Anaximandrus perfected it and made it known. It is also said that he mad the first geographical map where Earth was depicted in the shape of a cylinder.
He was the first Greek philosopher who put down his opinions and thoughts written in a book using prose, and the first who inserted the term «Αρχη», the greek word for principle, a term well used in philosophy ever since. He thought that the "Infinite" was the origin of everything, a vast and interminable primary matter, from which everything comes and to which everything returns. It is said that he once predicted an earthquake in Sparta, and his prediction proved to be correct.