Read a National Geographic magazine article about Krubera Cave and get information, facts, and more about cave exploration.

More than two kilometres beneath the surface of the western Caucasus Mountains lies the deepest known cave on Earth. Known as Veryovkina Cave, this vertical limestone system descends to a measured ...

Whether it’s 100 degrees or below-freezing, these caverns in the Sierra Nevada foothills stay at a constant temperature for ...

(via MinuteEarth) Krubera Cave, one of our planet’s deepest known caves, extends 2200 meters into the earth – that’s a depth of nearly six Empire State Buildings. Or at least, that's as far down as ...

Could Homo sapiens and an archaic and now-extinct species of early human have lived alongside each other on the Indonesian island of Sulawesi more than 65,000 years ago? This is the question posed by ...

Researchers say that the fossilized bones of "Homo naledi," so far found exclusively underground in South Africa, lack a key genetic male marker ...

Five experienced Italian divers died in the Maldives last week, with four of the divers' bodies found deep inside an underwater cave. A military rescue diver also died on the weekend during the ...