Scientists uncovered two new prehistoric shark species, Troglocladodus trimblei and Glikmanius careforum, in Kentucky's ...

In the pitch-black corridors of Mammoth Cave National Park, deep beneath Kentucky’s rolling hills, scientists have uncovered ...

First found in 1990, Son Doong Cave in Vietnam is so vast that it can fit multiple 40-storey skyscrapers inside.

Explore Hang Son Doong Cave in Vietnam, the world’s largest cave. Discover underground rivers, hidden jungles, misty clouds, ...

Rachel Chang is a travel and pop culture journalist who contributes to Travel + Leisure, Condé Nast Traveler, Lonely Planet, and more. Vietnam is home to the world's largest cave. It's so vast that it ...

The hidden world of a Grand Canyon cave and the researchers working to unravel the mysteries contained in strands of ancient ...

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 ...

(Image credit: Art by Benji Paysnoe) Researchers have discovered the remains of an ancient shark deep inside the world's longest cave system. The newly discovered shark, plucked from the walls of ...

There is one very real subterranean attraction underneath State Street, though: a salt cave, said to be the largest of its kind in North America. Santa Barbara’s salt cave is not a natural phenomenon.