Most glaciers around the world are retreating at unprecedented rates, but some are doing the exact opposite.
A NASA satellite has captured spectacular images of a fascinating natural process taking place, deep in the Greater Himalayan region.
Around 1 percent of glaciers worldwide experience surging, a phenomenon which is characterized by periods of rapid movement. During these periods, glaciers flow several times faster than normal, and can advance several feet per day, blocking waterways, crashing through trees and damaging infrastructure.
The images below, captured by the Landsat 8 satellite, highlight this process showing the difference in the position of the glacier and the lake between April 1, 2019 and April 5, 2018. The grey color of the ice is down to the presence of dust, soil and other debris on top of it.
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