The morphology of an animal's teeth often reflects its diet. ... (Pusa sibirica) also preys on large quantities of zooplankton and possesses distinctive jagged teeth. Thus, ...

The iconic image of the T-Rex, with its sharp, jagged teeth menacingly protruding from its mouth, may not be entirely accurate, ... meaning the animals could not curl their lips or snarl.

Proteins degrade over time, making their history hard to study. But new research has uncovered ancient proteins in the enamel ...

Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils.The first tooth-like structures seem to have been sensitive nodules on the skin of early fish ...

Sensory features on the armored exoskeletons of ancient fish may be the reason why humans have teeth that are sensitive to cold and other extremes. CNN values your feedback 1.

RIGGINS, Idaho — Jagged teeth, a sharp fin and gills. An alarming creature was found on the banks of the Salmon River this week: a shark. Yes, you read that right.