In his Lives of Eminent Philosophers
, Diogenes Laertes says Anaximander of Miletus was the son of Praxiadas, lived to about the age of 64 and was a contemporary of the tyrant Polycrates of Samos. Anaximander thought the principle of all things was infinity. He also said the moon borrowed its light from the sun, which was made up of fire. He made a globe and, according to Diogenes Laertes was the first to draw a map of the inhabited world. Anaximander is credited with inventing the gnomon (pointer) on the sundial.
Anaximander of Miletus may have been a pupil of Thales and teacher of Anaximenes. Together they formed what we call the Milesian School of Pre-Socratic philosophy.