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Hibernation mystery

In winter, bears slow their metabolic rates far more than their body temperatures would predict

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Don’t judge a bear by its temperature, or so suggests first-of-its-kind data on hibernation physiology.

There’s something as-yet-unknown going on with black bear hibernation that slows metabolic rates more than lower body temperatures alone can explain, reports ecological physiologist Øivind Tøien of the University of Alaska Fairbanks.

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