Photos show how a glacier can melt over time. PHOTOS: GNP archives
PHOTOS: GNP archives

Glacier National Park in Montana may have to change its name pretty soon. In 1850 there were about 150 named glaciers in the park. That number just dropped to 25 after two more disappeared in March 2010. Global warming is contributing to the melting of Montana’s glaciers, and of glaciers all over the world.