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'Animal Weapons' Offer Lessons for Human Arms Race

In their fight for mates, food and territory, animals use the weapons they were born with - teeth and claws, horns and hooves. Human animals can use fists and feet, but we have been able to augment our arsenal with sticks and guns and bombs. A new book by University of Montana evolutionary biologist Doug Emlen looks at the similarities between our weaponry and that of the animal world, including some armaments that reduce the likelihood of battle, and other weapons that, if they get out...

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