<i> [A] smart, deeply satisfying exploration of how creatures from insects to humans handle the complexities of physical space. <i>The Cleveland Plain Dealer </i> Delightfully lucid. . . . Ellard has a knack for distilling obscure scientific theories into practical wisdom. --Jonah Lehrer, <i>New York Times Book Review</i> One of the finest science writers I've ever read. . . . . It's fun, pure fun. <i>Los Angeles Times </i> [A] fascinating . . . rundown of the processes involved in keeping us and other animals moving in the right direction. --<i>The Globe and Mail</i> </p>