"Former Navy rescue swimmer Brian Dickinson was roughly 1,000 feet from the summit of Mount Everest ... when his Sherpa became ill and had to turn back, leaving

The deepest cave on earth was a prize that had remained unclaimed for centuries, long after every other ultimate discovery had been made. This is the story of t

Park ranger Anna Pigeon is enjoying the open spaces of Colorado when she receives an urgent call. A young woman has been injured while exploring a cave in New M

The Huautla in Mexico is the deepest cave in the Western Hemisphere, possibly the world. Shafts reach skyscraper-depths, caverns are stadium-sized, and sudden f

“Heart-stopping and relentlessly gripping. Tabor takes us on an odyssey into unfathomable worlds beneath us, and into the hearts of rare explorers who will do