This is the Muir Glacier in Alaska, shot in August, 1941 and August, 2004. It's only one example in NASA's new Images of Change app. Seeing the unbelievable effect of just a few decades of climate change in the following before and after photos is a sad and sobering experience.


Northwestern Glacier, Alaska, August 1940—August 2005


Pedersen Glacier, Alaska, Summer 1917, Summer 2005

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McCarty Glacier, Alaska, July 1909—July 2004


Patagonia Glacier, Chile, September 1986—August 2002


Kilimanjaro, Tanzania, February 1993—February 2000


Muir Glacier, Alaska, August 1941—August 2004