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This illustration shows the height of the Greenland ice sheet at present and during the last interglacial, about 130,000 years ago, as simulated by the NCAR-based Community Climate System Model and an ice-sheet model. The Earth may be warm enough by 2100 for widespread melting of the Greenland Ice Sheet and partial collapse of the Antarctic Ice Sheet, according to two new papers featuring model comparisons of Earth’s climate 129,000 years ago and over the next century. (ILLUSTRATION COURTESY OF BETTE OTTO-BLIESNER VIA SCIENCE MAGAZINE)

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