A study explores how uranium isotopes in fossilized shark teeth could provide insights into historical ocean anoxia, with ...

One of the reasons sharks have been so successful is that they have exploited different ecosystems and eaten different types of foods. And because they’re eating different foods, they need different ...

A “serrated blade” found sticking from a rock in the United Kingdom has been identified as a “nearly perfect” prehistoric shark tooth, experts say. It belonged to a Squalicorax falcatus ...

Some fossilized teeth from giant ancient megalodon sharks have unique scratches on them. These scratches, researchers believe, were possibly caused by the serrated cutting edge of other megalodon ...

Emma explains, 'With its large serrated teeth megalodon would have eaten meat - most likely whales and large fish, and probably other sharks. If you are that big you need to eat a lot of food, so ...

A “serrated blade” found sticking from a rock on Isle of Wight in the UK has been identified as a shark tooth that could be 100 million years old, experts say. Wight Coast Fossils photo A ...

Its serrated teeth were handy for slashing through ... he realized that tongue stones were in fact prehistoric shark teeth that belonged to something much bigger. An illustration from Steno ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.