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

A shark no larger than a human hand that stalked the ancient sea floor 340 million years ago has been dubbed the “chipmunk ...

Paleontologists at Mammoth Cave National Park have unearthed an ancient shark species previously unknown to science.

"I bent down to take a closer look, and to my shock, I realized it was a shark tooth," Phillipe said. "At first, my neighbor thought I was pulling a prank on him, but there it was in my hand—no ...

there’s something about Megalodon that grips the imagination like no other. Fossilized shark teeth are some of the most abundant remnants of prehistoric oceans, providing scientists with crucial ...

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

Other notable features of the shark include the very teeth it was identified by. According to researchers, the shark had front teeth that were chisel-like, while their back teeth had flat crowns ...

Turns out, the palm-sized tooth belonged to an animal that died at least 3.5 million years ago: an Otodus megalodon shark. "She told me she was wading in knee-deep water when she saw it and dove ...