Glacier National Park is losing its iconic glaciers to a changing climate. In the mid-1800s, this Montana landscape was covered by 150 glaciers - today only 25 remain.

Views of Greenland's Glaciers from Helicopter with National Geographic.

Glaciers appear on almost every continent. However, they are rapidly melting due to the warming climate.

Dr. M Jackson speaks of Iceland's glacial formations and what is occurring due to a warming climate.

Dr. M Jackson films Iceland's Glaciers by boat.