"On the Motion of Animals" is a scientific work by Aristotle that explores the principles of motion in living beings. In this treatise, Aristotle observes and analyzes the movements of various animals, from insects to humans, in order to understand the mechanics of motion and the physiological and psychological factors that drive it. Aristotle begins by examining the different types of motion, including natural, violent, and voluntary, and how they relate to the movements of animals. He then delves into the anatomy and physiology of different animals, looking at their skeletal structures, muscular systems, and nervous systems, and how they work together to produce motion. Read in English, unabridged.