WASHINGTON – In the cold waters of the Arctic, a denizen of the deep lurked for centuries. Now scientists calculate that this female Greenland shark was the Earth’s oldest living animal with a ...

Paleobiologist Dr. Kenshu Shimada has been fascinated by fossil sharks, including the giant Otodus megalodon, since childhood — he found his first megalodon tooth at 13 years old. So when he saw the ...

An Australian fossil reveals the first lamniform shark, measuring 20 feet long and living 15 million years earlier than believed.

Meet the longest-lived animal with a backbone. Scientists estimate that Greenland sharks live for around 250 years, but some may live as long as 500 years. These cold-water sharks not only eat sea ...

A small bioluminescent shark so rare that there are only two specimens in the entire world has been discovered in the Gulf of Mexico.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Paleobiologist Dr ...