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The retreat of Alaska's Columbia glacier over the last 47 years can be seen in a new series of incredible images.
As Science News reports, NASA and the U.S. Geological Survey have been capturing images of Earth since 1972, which is a record of images that allows researchers to examine the progression of ice over time.
That progression includes the flow and retreat of glaciers, large chunks of ice calving off and more, University of Alaska glaciologist Mark Fahestock told the outlet.
GREENLAND ICE MELT IS 'ACCELERATING,' NEW STUDY REVEALS
This false-color image of Alaska's Columbia glacier was taken in July 2014. (NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey)
Fahestock and his colleagues chose Landsat images of several glaciers, including the Columbia glacier, and made them into a short movie.
The resulting video shows that the glacier has retreated by more than 20 kilometers since about 1980.
WORLD'S THICKEST MOUNTAIN GLACIER IS MELTING, NEW NASA IMAGES REVEAL
The images were presented at the American Geophysical Union's annual meeting on Tuesday.
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