The glacier located near Sunlight Peak, Wyo., has been its icy self since the Yellowstone region's last major glaciation occurred some 20,000 years ago. The bulk of Sunlight's ice has remained ensconced in its northern Rocky Mountain keep for many thousands of years. But that is now changing, according to research from scientists at Washington University in St. Louis.

The glacier located near Sunlight Peak, Wyo., has been its icy self since the Yellowstone region’s last major glaciation occurred some 20,000 years ago. The bulk of Sunlight’s ice has remained ensconced in its northern Rocky Mountain keep for many thousands of years. But that is now changing, according to research from scientists at Washington University in St. Louis.

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