Where are the best places and when to search for shark teeth? Why are some blackish and some brownish? How old are they likely? This column obliges.

June 15 is National Megalodon Day, a massive prehistoric shark species that went extinct more than 3 million years ago.

One skull belonged to an extinct right whale species called Balaenella brachyrhynus. Using microCT scans, scientists found ...

Editor’s note: Every year, hundreds of undergraduates at the University of Delaware pursue research under the guidance of a faculty mentor. Such experiences provided by UD — a nationally recognized ...

NARRAGANSET – For the second time this year, a fossilized great white shark tooth has been found at Narragansett Town Beach, according to the Atlantic Shark Institute in Wakefield. Last summer, Oliver ...

It was near a ledge in 100 feet of water, Sandra Clopp says.

They’re more shark than bite. Sharks could soon experience a dental breakdown. These apex predators are at risk of losing their teeth due to the increased acid content in the world’s oceans, according ...

Sharks can famously replace their teeth, with new ones always growing as they're using up the current set. As sharks rely on their teeth to catch prey, this is vital to the survival of one of the ...

The fearsome teeth that define sharks as the ocean's apex predators, and are crucial for their survival, are now under threat from changing marine chemistry. A new study suggests that increasing ocean ...