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Sea Ice Is Moving Faster, Tiring Out Polar Bears
At a Glance The increased speed and fragility of sea ice off Alaska's coasts is having an adverse effect on polar bears.A new study documents how they have to expend more energy to stay within their preferred habitat. The movement of sea ice off Alaska's coasts is accelerating due to global warming, with unfortunate consequences for polar bears, according to a new study. Because most sea ice shifts throughout the year, polar bears are constantly on the move in order...