Add Yahoo as a preferred source to see more of our stories on Google. Archaeologists have long studied rock art to determine the underground movements of early humans. They know humans were there, but ...

In the absolute darkness 333 feet beneath Tennessee's Cardwell Mountain, I am belly-crawling through a passage barely wider than my shoulders, headlamp cutting through blackness so complete it seems ...

Belize is an adventure destination known for its great diving spots, waterfalls, Mayan ruins, and caves just begging to be explored. Unlike caves in other parts of the world, the cave system in Belize ...