The Mare Tranquillitatis pit is about 100 meters (330 feet) wide, with steep walls that stretch ... pit leads to an accessible cave below the moon's surface. This discovery is incredibly exciting ...

Fluorescent cave minerals are helping scientists explore how life could survive in harsh places like Europa. Far beneath ...

Findings about the chemical makeup of cave systems can teach us about life in places humans have yet to reach.

There are bouldering, lead climbing, and top-rope climbing routes. The wall has multiple cracks, a cave, overhung areas and less-than vertical climbing surfaces. The wall also has an inclined campus ...

As “Sweeny” Sewell climbs to the surface, hikers struggle ... our hallos more than a mile away in the cave. Measurements made at the top of the wall will reveal that from the bottom of ...

Fifty feet from the surface looms a pale haze ... We descend slowly along the cave's east wall until a triangular portal appears in our lights: the entrance to a 2,500-foot-long tunnel known ...

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.

Astrobiologist Joshua Sebree of the University of Northern Iowa suggests that South Dakota's Wind Cave exhibits chemical similarities to Jupiter’s icy moon Europa.

Cave floors are often uneven surfaces strewn with debris ... light returns to the orbiting sensor after bouncing off the cave walls. The result would be a synthetic image of the inside of the ...

This bizarre Patagonian cave remains shrouded in mystery. Its walls exhibit three distinctive styles of cave art linked to a hunter-gatherer society that flourished in Argentine Patagonia around ...

Photos of the flooding aftermath show mud stains on every surface of the cave ... was reportedly moved 20 feet and shoved ...