Woodpeckers are birds that drill into trees with their strong, pointed beaks. They d this t find ins hiding un the ba, to ma holes wh they c nest, a to commu with other woodpeckers. Some species can strike a tree up to twenty times per second. Scientists have long wondered why this does not injure their brains. One reason may be that their brains are very small, so they can survive forces that would harm a larger brain.

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