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Watch Alaska's Columbia glacier retreat over four decades | Science News

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Alaska’s Columbia glacier began rapidly retreating around 1980, and its leading edge has moved more than 20 kilometers inland. These images, captured by the joint NASA/U.S. Geological Survey Landsat satellites, were stitched together into a video to show the glacier’s dynamic evolution from 1972 to 2019. Read more: Video: Mark Fahnestock/University of Alaska Fairbanks

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