Learn why both human teeth and an ancient fish contain a key sensory substance — but in different locations.

Sensory features on the armored exoskeletons of ancient fish may be the reason why humans have teeth that are sensitive to ...

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 ...

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

After the animal living in the shell dies and decomposes, the hard outer shell — made mostly of calcium carbonate — is left ...

Curious about animals that eat cactus plants? Read on to learn about seven animals that expertly chow down on cacti and how they avoid harm.