Explore the World's Largest Underwater Cave January 17, 2018 - The world's longest underwater cave has been discovered near the city of Tulum, on Mexico's Yucatán Peninsula. The new discovery ...

The Leadbeater's Possum can fit in the palm of your hand, and it has been presumed extinct twice. Now a new population has ...

The recent discovery of a lunar lava tube hints at a hidden network of caves that could provide shelter for future explorers. NASA's Lunar Reconnaissance Orbiter (illustrated with Earth in the ...