Why do cats lick and chew catnip? Researchers find an answer

Anyone who has seen a cat experience catnip knows that it makes them go a bit wild—they rub in it, roll on it, chew it, and lick it aggressively. It is widely accepted that this plant, and its Asian counterpart, silvervine, ...

How do woodpeckers avoid brain injury?

Slamming a beak against the trunk of a tree would seem like an activity that would cause headaches, jaw aches and serious neck and brain injuries. Yet woodpeckers can do this 20 times per second and suffer no ill effects.

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