A fossil from a seagull-sized winged reptile that lived millions of years ago was found in Arizona, and the creature has now ...

Gnashing and grinding your teeth while you sleep? You aren't alone. Also known as sleep bruxism, an estimated 5% to 8% of people grind their teeth in their sleep. It can lead to several issues ...

Saber teeth — the large fangs of saber-tooth cat fame — are fearsome. They evolved at least five times in predators that are now extinct, but there's been something of a mystery as to why.

Different types, or isotopes, of zinc are absorbed when fish and other animals eat, ... a new study of minerals in fossilized teeth has found.