This story appears in the August 2010 issue of National Geographic magazine ... They built up during ice ages, when the sea level dropped dramatically, leaving the caves dry.

This story appears in the March 2017 issue of National Geographic magazine ... in mapping new parts of the cave and collecting scientific data. Ice crystals populate Full Moon Hall.

The ocean has a 'conveyer belt.' Here's why it's important. An astonishing—and accidental—Ice Age cave discovery An astonishing—and accidental—Ice Age cave discovery Ice Age mammoth’s ...

When Sergio García-Dils de la Vega kissed his girlfriend, Pilar Orche, goodbye at the entrance to Krubera Cave, he promised to return the next day. But after teammate Bernard Tourte bruised his ...

Watch on DVD or Blu-ray starting March 27th, 2007 - Buy National Geographic: Emperors of the Ice DVD ...