#484 Animal Weapons (Rebroadcast)
b'This week, we\'re talking about weapons: both the ones that evolve in nature, and those created by humanity. We\'ll talk about the arms races that spur the development of horns and claws, warships and nuclear weapons, with Doug Emlen, Professor in the Division of Biological Sciences at the University of Montana, and author of "Animal Weapons: The Evolution of Battle."'