Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds ...

Anyone who has ever squirmed through a dental cleaning can tell you how sensitive teeth can be. This sensitivity gives important feedback about temperature, pressure—and yes, pain—as we bite and chew ...

Close-up of a female stolon–one of the independent reproductive units–from the worm Ramisyllis kingghidorahi. It has already ...