Melting Mountain Glaciers May Not Survive the Century

If you haven’t hiked across a glacier yet, you might want to get booted up sometime soon. The world’s high-mountain glaciers are melting faster than scientists previously thought; since 2015, they have been losing nearly 300 billion tons of ice per year. If this rate of melting continues, many could disappear entirely by the middle of the century, according to a comprehensive new study out today.

Researchers in Canada, France, Switzerland, and Norway collected 20 years of satellite images taken from a special camera on a NASA satellite called Terra. The device, called ASTER, for Advanced Spaceborne Thermal Emission and Reflection Radiometer, took images of more than 210,000 glaciers around the world, photographing each with two…



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