Photo: White Thunder Ridge from 1941 and 2004

523 of 1009
523 of 1009

Glaciers have been shrinking and retreating around the world, due to the global warming caused by human activities. Here, we can see how White Thunder Ridge in Glacier Bay National Park, Alaska changed over the course of the past century. On the left, we see the ridge in August of 1941, and on the right we see August of 2004.

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