Commenting on the end of Aristotle's On the Heavens Book 3, Simplicius examines Aristotle's criticisms of Plato's theory of elemental chemistry in the Timaeus.

In the three chapters of On the Heavens dealt with in this volume, Aristotle argues that the universe is ungenerated and indestructible. In Simplicius' commenta

In chapter 1 of On the Heavens Aristotle defines body, and then notoriously ruptures dynamics by introducing a fifth element, beyond Plato's four, to explain th

Aristotle believed that the outermost stars are carried round us on a transparent sphere. There are directions in the universe and a preferred direction of rota

An astounding project of analysis on more than one hundred translations of ancient philosophical texts, this index of words found in the Ancient Commentators on