Bigger is better - at least when it comes to survival of the fittest. Through personal stories, historical narrative and detailed sketches, biologist Emlen charts the evolution of animal weapons so bizarre and gargantuan, it's amazing they even exist - like the towering antlers on an elk or the enormous claws on fiddler crabs. The one-upmanship that leads to such brutal adaptations isn't unique to the animal kingdom; we see it again and again in the arms races of our own species. According to Emlen, understanding what drives this competition, as well as the conditions that can lead to detente, might just help us survive in a world of human weapons more extreme than ever.
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