Cave formation starts with a simple chemical reaction between water and carbon dioxide in the atmosphere, creating carbonic acid. This weak acid forms when rainwater combines with CO2, then ...

Just three years ago, a group of Idaho men traveled to an unnamed Western state and in an unnamed range of rugged mountains, hiked up a steep trail. At the top, they unraveled climbing ropes, stepped ...

(via PBS Terra) Below the Chihuahuan Desert in southeastern New Mexico, lies an extensive system of limestone caves, among them the pristine Lechuguilla Cave and the famed Carlsbad Cavern, home to one ...

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.

An interstate might seem an arbitrary boundary. But an attentive West Texas traveler driving north of Interstate 10, on ...