Specialized protein helps these ground squirrels resist the cold

Being less sensitive to low temperatures may help the animals slip into hibernation

thirteen-lined ground squirrel

GROUNDED  When thirteen-lined ground squirrels hibernate, they lower their core body temperature to just a few degrees above freezing. And when awake, new research shows, the critters have a decreased sensitivity to cold compared with nonhibernating kin.

Gracheva Lab

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