Beneath the Earth’s surface lies a world so extreme and isolated that it seems more like an alien planet than part of our own. Veryovkina Cave, the deepest known cave on Earth, plunges a staggering 7, ...

Sarawak Chamber, briefly illuminated by dozens of flashbulbs, is the largest cave chamber yet discovered on Earth—more than twice the size of Britain’s Wembley Stadium—and home to thousands ...