Watch as divers locate fossils in blue holes—from crocodiles, owls, tortoises, birds, and more—species that are now extinct in the Bahamas and some of which have never been recorded in science before.

If one thing’s clear from Jill Heinerth’s breathtaking new memoir on her life as a professional cave diver, it’s that this unusual career path requires serious mettle. Self portrait under the tannic ...

Extreme explorers attempt the deepest underwater body recovery in history. March 19, 2007 — -- Bushman's Hole, on the edge of the Kalahari Desert in South Africa, is one of the strangest places ...

The world under water holds many clues to the history and science of our planet—from a record of the Earth's climate to life forms that develop in extreme conditions, from evidence of how life first ...