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Pancake Ice

Photo: Pancake ice and a boat on Lake Mendota, Wisconsin
In Madison, Wisconsin, winter is milder than in years past. Researchers monitoring ice on Lake Mendota find that ice cover on the lake averages 40 fewer days now than it did 150 years ago. Says University of Wisconsin researcher John Magnuson, "Wisconsin is losing winter as we knew it."
Photograph by Peter Essick

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