The deepest cave in the Western Hemisphere — the Sistema Huautla in Mexico — is even longer than originally thought, scientists and cavers have discovered. Cave explorers expanded the map of Sistema ...

Gabriel C Rau has received funding from the NSW Government (Australia), the European Commission, the German Research Foundation (DFG) and the German federal government. Cave explorers have traversed ...

Deep below the Earth's surface, rock and mineral formations lay hidden with a secret brilliance. Under a black light, the chemicals fossilized within shine in brilliant hues of pink, blue and green.

Beneath the surface of an otherwise unassuming National Park, a labyrinth showcases hundreds of millions of years of geologic history. Each shade of tan layered on the walls represents a different era ...

A skull found in Petralona Cave in Greece is at least 286,000 years old, revealing the existence of an ancient human species still unknown.

Scientists have the most convincing evidence yet of an underground cave on the moon. The large cave could be a safe, warm place for astronauts to work and live. The researchers want to use radar ...

The newly formed Friends of Wind Cave group will help support and promote Wind Cave National Park and will serve as citizen advocates for the park as well as reinforce the bond between the park and ...

If you have a bat phobia, stay away from this Texas cave at all costs - but if you're neutral or a fan of the animals, this is one sight you'll never forget.

It's no surprise that Mount St. Helens is the source of some of Washington's most famed natural wonders, like the picturesque, heart-shaped Spirit Lake that survived the deadly 1980 eruption, but was ...