Video: "Timelapse of Alaskan 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. (Courtesy/Credit: NASA's Goddard Space Flight Center. Time-lapse videos courtesy of Mark Fahnestock, Geophysical Institute, University of Alaska Fairbanks)