Anaximander(C. 610 Bce–After 546 Bce)
Anaximander is the first Greek scientist and philosopher whose thought is known to us in any detail. He was born in Miletus c. 610 BCE and died shortly after 546 BCE. He was thus in his twenties in 585 BCE, the year of the famous solar eclipse that Thales is said to have predicted. According to the ancient tradition, Anaximander was the "pupil and successor of Thales"; but in view of our ignorance of Thales' real achievements, it is perhaps Anaximander who should be considered the founder of Greek astronomy and natural philosophy. Nothing is known of his life except an unverifiable report that he led a Milesian colony to Apollonia, on the Black Sea. His lifetime corresponds with the great age of Miletus, when it was the richest and most powerful Greek city in Asia Minor.
His scientific achievements are said to include the first Greek world map, the first Greek star map or celestial globe, and the invention, or rather adaptation, of the gnomon (the vertical pointer of a sundial) for use in measuring the hours of the day and annual variations in the course of the sun. According to Pliny, he also traced the sun's annual path in the ecliptic and noted its inclination with regard to the celestial axis.
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