Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

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 ...

A Texas A&M University at Galveston professor is part of a diving team that descended 462 feet in a West Texas cave, believed to be the deepest underwater cave in the United States. Tom Iliffe, ...

MIAMI, FL (AUGUST 26, 2010) -- The cover story of the most recent issue of National Geographic Magazine (August 2010) features a University of Miami (UM) led expedition to the underwater caves of the ...

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level was ...