Podcast: Squirrel Tails, Inbreeding, and the Downsides of Big Brains

Why do ground squirrels shake their tails? How does inbreeding cause problems for offspring? And what are the downsides of big brains? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.

(Listen to the full Science podcast and more podcasts.)

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