48 Years of Alaska’s Glaciers

New time-lapse videos of Earth’s glaciers and ice sheets as seen from space – spanning nearly 50 years – are providing scientists with new insights into how the planet’s frozen regions are changing. Using images from the NASA-USGS Landsat program dating back to 1972 and continuing through 2019, glaciologist Mark Fahnestock of the University of Alaska Fairbanks, has stitched together six-second time-lapses of every glacier in Alaska and the Yukon. The videos clearly illustrate what’s happening to Alaska’s