A population of orange dwarf crocodiles lives deep within Gabon's Abanda cave system, and scientists believe they are morphing into a new species. These reptiles live in complete darkness ...

French explorer Michel Siffre spent more than 60 days underground in July 1962 to discover how the human body would be impacted without time cues.

“He would go to some spot, always picked a cave to live in, and then he would live an exemplary primitive life there.” Agostini traveled all over Europe and South America, crossing the Andes ...

Scientists are using these fluorescent features to understand how the caves formed and the conditions for supporting life in extreme, and even extraterrestrial, environments. Deep below Earth's ...