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 7, ...

One of the world's deepest and most dangerous caves lies in Abkhazia, a disputed part of Georgia. It takes days to get to the ...

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...

Deeper,' directed by Jennifer Peedom, is a visually stunning documentary that follows explorer Richard “Harry” Harris on a ...

Krubera Cave in the republic of Georgia is currently the deepest known cave, at 7,208 feet. But Dark Star, with so many areas still to survey, is a prime candidate to take over the title.

Thai cave rescue hero Richard Harris explores new underwater depths in documentary 'Deeper,' which world-premieres at SXSW ...