This undated handout photo provided by the journal Science shows an American Black Bear. Hibernating bears  set their energy demands to low, but they don't chill out very much, according to new research. (AP Photo/Institute of Arctic Biology, University of Alaska Fairbanks)
This undated handout photo provided by the journal Science shows an American Black Bear. Hibernating bears set their energy demands to low, but they don't chill out very much, according to new research. (AP Photo/Institute of Arctic Biology, University of Alaska Fairbanks)
published Friday, February 18th, 2011
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WASHINGTON — Hibernating bears set their energy demands on low, but unlike most other animals that take long winter naps they don’t chill out very much, researchers reported Thursday.

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