Experts say it had a distinct curved row of teeth, used to crush small sea creatures. The fossils found are estimated to be 355 million years old, back when Mammoth Cave was nothing but warm shallow ...

The fossil was found in the Ste. Genevieve Formation, which dates to approximately 335 to 340 million years ago. It was discovered by a combined team of scientists from the National Park Service ...

The air is cool and damp. The light shining from behind is low and tinted, while a park ranger's hand hovers over a button. Then, a switch clicks. Light floods a chasm in the stone, a chamber called ...

A new species of shark was discovered in Kentucky's Mammoth Cave National Park. The ancient shark is called a "Macadens Olsoni." Experts say it had a distinct curved row of teeth, used to crush small ...

Proposed reconstruction of the new to science species Macadens olsoni, discovered through fossil research at Mammoth Cave National Park. Art by Benji Paysnoe. Mammoth Cave National Park’s rich history ...