Add Yahoo as a preferred source to see more of our stories on Google. I'm a severe claustrophobe. After getting trapped in a slide in my local McDonald's at five years old, I swore off all tight and ...

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 ...