How far would you go for a fossil? On a two-year retrieval mission of nearly 60 hours in an underground cave, we met our limits—and went beyond. The limestone slope of Potholes Cave Reserve is ...

Caving (or spelunking) is an adventurer's unique opportunity to explore the hidden wonders beneath the earth's surface ...

Under a black light, the chemicals fossilized within shine in brilliant hues of pink, blue and green. Scientists are using these fluorescent features to understand how the caves formed and how ...

The surface of Mammoth Cave National Park ... a match and the tiny dot of light magically spreads, illuminating a circle of astonished faces. Year-round. Underground, all days are about the ...

The cold blackness swallows the light of ... be gathered underground, much of it contained in speleothems—mineral deposits called stalagmites and stalactites that rise from cave floors and ...