Earth not only does not support diverse ecosystems, but it also has places that serve as analogs for other celestial worlds in our solar system. Astrobiologist Joshua Sebree of the University of ...

After eons underground, it was discovered by accident. Within a couple of decades, it was already under threat.

Hidden inside Vietnam’s Phong Nha-Ke Bang National Park is Son Doong, the largest cave on Earth. It’s so vast that a Boeing 747 could fit through its chambers. Inside, jungles grow beneath openings in ...

Mars has never looked more like a planet built for hiding secrets. A cluster of eight vast, water-carved caves appears almost engineered to shield fragile chemistry, or even biology, from the brutal ...

Why it's incredible: The cave is so deep, the world's tallest building could fit inside it. The Hranice Abyss — or "Hranická propast," in Czech — is the deepest known freshwater cave in the world.

Ancient Homo sapiens may have benefited from sunscreen, tailored clothes and the use of caves during the shifting of the magnetic North Pole over Europe about 41,000 years ago, new University of ...

Below the Chihuahuan Desert in southeastern New Mexico, lies an extensive system of limestone caves, among them the famed Carlsbad Cavern, home to one of North America’s largest underground chambers.