Podcast: Fly-Proof Zebras, Piranha-Proof Fish, and Deep Brain Stimulation

How does the arapaima fish keep from being shredded by piranhas? Why does the zebra have its stripes? And how can shocking the brain improve memory? 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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