The longest cave system in the world sits hundreds of miles from the nearest ocean. 330 million years ago, it was the ocean.

Fossils of an ancient shark species have been discovered in a Kentucky cave, officials announced during Shark Week. The Discovery Channel isn’t the only one educating shark lovers this week. Mammoth ...

Inside the twisting tunnels of Mammoth Cave, the world’s largest cave system, scientists have uncovered fossilized remains of two ancient shark species that once prowled Earth’s waters some 325 ...

About 340 million years ago, a tiny shark swam in the waters of the world’s longest cave system in Kentucky, its unusual mouth curved in a way that will ultimately end up defining its future legacy.

Tucked deep inside the winding, limestone labyrinth of Mammoth Cave, scientists just uncovered something unexpected: a shark. Not a living one, thankfully—unless you’re into waking nightmares—but the ...

It's Shark Week, and Mammoth Cave took the unofficial holiday to announce the discovery of another new shark species. Mammoth Cave announced the discovery of the "Macadens olsoni" Thursday. The fossil ...

A rare bite into the past. The fossilized tooth of a newly discovered ancient shark species – dating back about 340 million years – has been unearthed in the world’s largest cave system, officials ...

(NEW YORK) -- A new species of ancient shark has been discovered at Mammoth Cave National Park in Kentucky, officials said. Named Macadens olsoni, the fossils were found in the Ste. Genevieve ...

MAMMOTH CAVE, Ky. — A new-to-science species of ancient shark was recently discovered in Mammoth Cave National Park in Kentucky. The Macadens olsoni is known for its unique tooth whorl, a curved row ...

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 ...