Experts say newly found karst cave has sediment 'gene pool' that hasn't been seen before, but it needs to be protected before ...

Other lakes followed in the Lebarge Borehole, some of them lined with bulbous, milky mounds of calcite unlike any cave formation I had ever seen. In some places, rows of ghostly human-sized forms ...

This story appears in the January 2011 issue of National Geographic magazine. “Past the hand of dog, watch out for dinosaurs,” says a voice in the dark. I recognize Jonathan Sims’s clipped ...

A recent study on the cave paintings of the Altamira Cave in Santillana del Mar, Cantabria (Spain) has concluded that some of ...

How many of you have ever photographed the highly-ornamented cave formations within Carlsbad Caverns National Park in New ...

stalagmites and other kinds of calcite deposits. Though it wasn't opened to the public until 1981, historians believe the cave was first discovered at the end of the 18th century. The cave sits in ...

Under Wheeler Peak sits Nevada’s only glacier, still hanging on despite the state’s desert reputation. Scientists call it an ...

Found in the Black Hills of South Dakota, this cave system offers guided tours through rooms sparkling with calcite crystals and delicate formations that live up to its glittering name.

The water flows through underground cave systems depositing calcite crystal to form stalactites and stalagmites. The flow of meltwater during the ice age eroded the landscape to form what are ...