For several years, photographer Eric Guth has...  ...ing pictures of caves and hollows that form under glaciers . He explained how he knows where to look for goo...  ...und that melt water has everything to do with how glaciers change, move and create points of entry. As I've...

As Arctic ice fields retreat, more and more artifacts that were frozen and buried are coming to light. In 1997, hunters found a dart that turned out to be over 4,000 years old. Since then, scientists are searching for hi...