The chemical cocktail behind why polar bear fur doesn’t freeze

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The chemical cocktail behind why polar bear fur doesn’t freeze

NPR reported “I learned that polar bears are invisible in infrared cameras, meaning their fur has the same temperature as the surroundings,” says Holst, of the University of Bergen in Norway. She also knew that polar bears jump into frigid water when they hunt, coming back onto land to eat their prey. Most mammalian hair can freeze when it gets wet in cold temperatures — think human beards on a frosty winter day. But, Holst noticed, polar bear f…