Vietnam's Son Doong, the world's largest cave passage, started its life millions of years ago as a crack the width of a piece ...

Sn oòng Cave lay completely undisturbed, hidden deep within the Vietnamese jungle, for millions of years. That was until just ...

The longest known underwater cave in the world is even longer than we thought. As of the start of this year, cave divers have mapped 524 kilometers (325.6 miles) of a subterranean water 'web' near ...

His body was discovered 1,100 meters deep in the world's deepest cave in Abkhazia, Georgia, nine months after the climber ...

This week's 60 Minutes takes viewers deep into the largest known cave passage in the world. The journey was one of the most ...

Divers in Mexico's Yucatan Peninsula say they have discovered the world's largest underwater cave. Underwater archaeologists discovered last week that the cave system known as Sac Actun, located near ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...