The sometimes uncomfortable sensations we feel in our teeth may be an evolutionary holdover from the scaly exteriors of ...

New research from the University of Chicago reveals that teeth may have evolved from sensory armor in ancient fish.

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.

This armor wasn't just for show. It could have seen deadly combat during the epic Trojan War.

HARIDY: Thought to be the scales of this ancient fish-like thing. DANIEL: Forming a kind of armor - the Anatolepis fragments hadn't been imaged in detail before, so Haridy and her team booked time ...

That's because it's just a smattering of these tiny bumpy flakes, "thought to be the scales of this ancient fish-like thing," forming a kind of armor. Because the Anatolepis fragments hadn't been ...