Roman copy of a Greek marble relief of the ancient Greek philosopher, Anaximander (born c. 611-546 BCE, in Miletus), shjows his partially inscribed name. With Thales and Anaximines, Anaximander was one of the three great thinkers from Miletus. He believed that everything in the physical world is derived from materials formed out of an infinite mass not subject to age and decay which he called the apeirion. As well as describing the cosmological relationship between the Earth and the other heavenly bodies, he speculated that human beings must have developed from lower species, essentially anticipating the theory of evolution. He is credited with drawing the first map of the known world.