The three science students from Georgia Tech arrive in brand-new Dickies coveralls, ready to enter the bowels of the Earth. "Sulphur Cave is a really dangerous place," says David Steinmann, a veteran ...

This story appears in the June 2010 issue of National Geographic magazine. The human skeletons were piled up like signposts in the sand. For Xuanzang, a Buddhist monk traveling the Silk Road in A.D.

Beneath the island’s rainforest, explorers search for new discoveries deep within some of the Earth’s largest, longest, and wildest caves. At dusk, a swarm of bats disperses to hunt in the rainforest ...

While precious summer hours are slowly ticking away, fall-like weather may be nice enough to get outside on the weekends for weeks yet. In case you weren't paying attention, fall returns on Sept. 22.

For the shuffling parade of Paw Patrol officers, princesses and superheroes, there was no shortage of candy or spooky delights at the edge of a forest just outside Knoxville, Tenn. But off to the side ...