c.610 - c.546 BC
Anaximander has been called the father of astronomy, because he was the first thinker who developed a cosmology using mathematical proportions to map the heavens.
Anaximander was born in Miletus and might have been a pupil of the philosopher Thales. Anaximander explained the origin of the universe with the theory of 'apeiron'. 'The universe is boundless but consists of a primary substance'.
Anaximander wrote on geography, astronomy, cosmology and biology. He believed that human infants were at first produced in a fishlike creature - an early form of evolutionary thinking.
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From the Internet Encyclopedia of Philosophy