In caves, water drips from the walls and leaves minerals behind. Over time, these can produce formations called stalagmites and stalactites. Now let's do a little review of where stalagmites and ...

Caves are some of the most interesting and perplexing features on our planet. Here's how they form! Oh yeah and I did the math wrong in comparing the size of the cave to the grand canyon, turns out ...

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.

Stalagmites that formed in caves hundreds of thousands of years ago preserve a record of how fires behaved the last time Earth’s temperatures were as high as they are today. New Scientist environment ...

Through the intricate study of lava tubes -- caves formed following volcanic eruptions when lava cools down -- an international team of researchers has uncovered clues about Earth's ancient ...

The Marble Caves sit on the shores of a turquoise glacial lake in southern Chile. Light bounces off the water onto the walls, creating a magical, ever-changing display inside the caverns. When you ...

In the summer of 1962, French geologist Michel Siffre descended 130 meters into the Scarasson cave in the French Alps. He ...