Chinese astronauts, known as taikonauts, were sent into a large limestone cave system in a remote area of China.

Twenty-eight Chinese astronauts have just completed a highly demanding cave-training mission designed to replicate the ...

Deep underground, flowing water leads explorers into a cave shaped by constant motion and time. The waterfall inside Nash Cave reveals narrow passages, slick rock, and areas rarely documented.

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 dark spaces forever. So it's not entirely surprising that I couldn't ...

On this episode, we hear how a team of researchers at the University of Northern Iowa is exploring the deepest caves in the U.S. with NASA funding. This could inform the search for life on other ...