Hammer Time

Woodpecker study reveals the secret behind the birds' astonishingly hardy skulls

They’ve simply evolved to take frequent blows to the head.

Robert Shadwick & Erica Ortlieb (University of British Columbia)

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But woodpeckers, on the other hand, effortlessly withstand repeated impacts without bashing their skulls.

One prevailing explanation is that their skulls absorb shock, like a helmet, to help the birds avoid concussions and other injuries.

Hal Beral/Corbis/Getty Images