Woodpecker Heads are Helmets...AND Hammers

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You’d think you’d need a very padded helmet to be able to slam your head against a tree continuously without getting a concussion, but it turns out woodpeckers' skulls aren't doing as much shock absorbing as we previously thought!

Hosted by: Hank Green

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https://doi.org/10.1002/adts.201800152 (paywall)

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