In the depths of the world's longest cave, researchers have uncovered the fossilized remains of a 340-million-year-old shark.

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...

Teeth from sharks and rays can be used to study their diet, but one of the biggest challenges in shark science is collecting ...

That is why shark teeth are the most abundant vertebrate fossil material on the Earth and in the sea. Scalloped hammerhead on the reef. NOVA: Do sharks have to keep swimming to breathe?

Scientists believe their teeth—which are not used in feeding ... as large as a full-grown whitetip reef shark. During the 20th century, basking sharks were widely fished for their liver ...

(Graham Thompson/CBC) A Saint John auction house has opened online bidding on a collection of megalodon shark teeth that are millions of years old. Sarah Jones, curator at Jones Auction House ...