Summary: Publisher Summary 1 Aristotle's Meteorology influenced generations of speculation about the earth sciences, ranging from atmospheric phenomena to earthquakes. The commentary of John Philoponus on the opening three chapters of Meteorology is here translated for the first time into English by Dr Irina Kupreeva, building on the work of L.G. Westerink. Philoponus, who today is increasingly respected as a philosopher in his own right, here engages critically with Aristotle's views about the building-blocks of our world, its size and relationship to other heavenly bodies, and reception of warmth from the sun. This volume will be of interest to students of ancient and medieval philosophy, history and philosophy of science. Inna Kupreeva is Lecturer in Philosophy at the University of Edinburgh.   Publisher Summary 2 Discusses Aristotle's exposition of the structure of the cosmos and different layers of its elemental make-up, the mutual influence of these elemental layers, and the effects produced by their interaction.