Imja Glacier in the Himalayas, as seen from a point above Amphu Lake and from the upper slopes of Island Peak.
Left: Autumn, circa 1956.
Right: October 18, 2007.
The latter image shows pronounced retreat and collapse of the lower tongue of the glacier and the formation of new melt ponds.
Credit: 1956 picture taken Erwin Schneider; courtesy of the Association for Comparative Alpine Research, Munich.
2007 photo taken by Alton Byers; courtesy of the Archives of Alton Byers and the Mountain Institute.