A new study reveals that the sensitivity of teeth, which makes them zing in a dentist's chair or ache after biting into something cold, can be traced back to the exoskeletons of ancient, armored fish.

Hundreds of millions of years ago, fish had sensory features on their exoskeletons that contained dentine, the material that makes our teeth sensitive today ...

Trawlers off the coast of Cabo Verde hauled in the “spoon”-nosed sea animal but didn’t realize how unique it was at first. Take a look.