Ἀναξίμανδρος

Son of Praxiades, Milesian, philosopher, a relative and student and successor of Thales.¹ He first discovered an equinox and solstices and hour-indicators, and that the earth is situated in the very middle [of the universe]. He also introduced a sundial and explained the basis of all geometry. He wrote On Nature, Circuit of the Earth, and On the Fixed Bodies and Globe and some other works.