The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ancient times, according to our newly published work. As paleontologists ...

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 “ serrated ...

A large fossil study shows young shark and ray species vanish faster, while older species stay stable over time.

The fossil shark Ptychodus was first identified 190 years ago, but in the intervening centuries of paleontological inquiry, a comprehensive look at the ancient fish has been hard to come by. Until now ...

Peruvian paleontologists on Wednesday unveiled the 12-million-year-old fossil of a prehistoric porpoise found near the country's Pacific coast. Otodus megalodon was the largest predatory fish in Earth ...

The fossil record of sharks and related elasmobranchs offers a comprehensive window into the evolutionary dynamics that have shaped marine ecosystems over millions of years. From preserved teeth and ...

Shark teeth are often considered the most common vertebrate fossils in the world, and for good reason. Each individual shark has rows upon rows of chompers that fall out and get replaced in conveyor ...

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In some circles, Arkansas is known for its sharks. Their fossilized remains are embedded in the Fayetteville Shale, which was once a muddy sea floor. These well-preserved fossils prompted one ...