Glaciers in southeastern Greenland including, from left, Helheim, Fenris and Midgard are seen in a Landsat 8 image from Aug. 12, 2019 (bottom image), and a composite image from Landsat 1 scenes collected in September 1972 (top image). Comparing images across the span of the Landsat mission provides a record of almost five decades of change to this region of southeast Greenland.
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