Written by a distinguished US physiologist, this book examines how animals move, comparing running, swimming and flying. In doing so, it examines the common principles of design and movement that animals have evolved to move through very different physical environments. The underlying physiological and biomechanical properties of muscles, skeletons and nervous systems are linked to the mechanisms and control of movement. At the same time, the book articulates the captivating grace, speed, and power of animal movement.