Anaximander

a Greek mathematician and philosopher, succe or of Thales as head of the physical school of philosophy, was born at Miletus, in 611 B. c. He is said to have discovered the obliquity of the ecliptic, and he certainly taught it. He appears te have applied the gnomon, or style set on a horizontal plane, to determine the solstices and equinoxes. The invention of maps is ascribed to him.