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.

Explorers searching for a cave rumored to run for miles descended into a massive underground system filled with cold air and deep chambers. After navigating pits, breakdown piles, and underground ...

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 ...