Horns, Claws, and Teeth: The Animal Weapons Arms Race
Animals have developed horns, claws, and teeth to defend themselves, but what is the advantage of a bulky crab claw that weighs half as much as the entire animal, or 14-foot-wide antlers on the extinct Irish Elk that stood seven feet tall? Doug Emlen, a biologist and author of Animal Weapons, describes the evolutionary arms race that pushes these animal weapons to the extreme. (Read an excerpt from the book here.)
Douglas J. Emlen is a professor of biology at the University of Montana and author of Animal Weapons: The Evolution of Battle (Holt, 2014).