Through the long days and nights he and four other men were trapped inside a flooded cave, all Mued Duangsomdy could think ...

UC San Diego bioengineer Kiana Aran spent five days sealed inside a pitch-black chamber in rural Poland last November, tracking her own brain and body as her internal clock fell apart. The ...

Instead, there are two caves that alternate as the record holders for the deepest cave on our planet: Veryovkina and Krubera-Voronya ( ...