A paleontologist snorkeling through the dark underwater passages of a Texas cave made a startling discovery: the streambed ...

From mammoths to giant tortoises, a Texas cave discovery is giving scientists a new look at life during the Ice Age.

What starts as a carefully planned cave dive quickly becomes something much more serious. The goal is simple on paper. Swim ...

Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

On Sunday’s episode of The Excerpt podcast: Hidden beneath Earth’s surface are caverns and pathways that hold the secrets of our planet’s very beginnings. Even after decades of exploration, there are ...

A water-filled cave in central Texas has revealed an extraordinary concentration of prehistoric fossils. Hidden beneath ...