Currently 30.2 km long and between 0.5 and 2.5 km wide, Gangotri glacier is one of the largest in the Himalaya. Gangotri has been receding since 1780, although studies show its retreat quickened after 1971.
This detailed astronaut photograph shows Canada’ Heiltskuk Icefield—mostly covered by snow across the upper mountain slopes—and two major valley glaciers that extend from it.