Saber-tooth tigers and other meat eaters checked into a cave near Madrid, Spain, but they couldn't check out.
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A newly discovered species of reef coral hangs from the ceiling of undersea caves like a colony of petrified bats.
Scientists have found a stalagmite in an Oregon cave that tells the story of thousands of winters in the Pacific Northwest.
In the gloom of the caves and gorges of China, a plant has been discovered thriving in the dark.
A daring, death-defying race to find the planet's deepest hole is chronicled in a gripping new book.
White nose syndrome is devastating bats across eastern North America, and threatening local populations with extinction. Though there is no cure, researchers may have found a way to quell the carnage.
