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Update: Polar bears 'enter a state scientists call walking hibernation. Polar bears in this state appear to maintain normal body temperature but are able to save energy by reducing their metabolic rate and recycling proteins' -- 'Polar bears aren't deep hibernators, but enter a state of carnivore lethargy'
By: Marc Morano - Climate DepotFebruary 11, 2011 4:12 AM
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