A step toward understanding how hibernation protects hearts

Wintry weather means hats and scarves for some mammals, and hibernation for others. Hibernation dramatically lowers body temperatures, heart rates and oxygen consumption—things that would be fatal to other animals. A team ...

How rodents bulk up for winter without going nuts

When Arctic ground squirrels need to bulk up for winter, they get a boost from an enormous spike in the levels of steroids in their blood. So why doesn't it lead to 'roid rage?

Arctic ground squirrel sheds light on circadian rhythms

The Arctic ground squirrel has developed highly specialized adaptations to extreme environments, and it has a lot to teach us about circadian rhythms and biological clocks. This species maintains circadian rhythms throughout ...

Professor uses data gathered from squirrels to make music

The squirrels are wary at first. They carefully sniff at the traps set on the chilly ground of Alaska's north slope, suspicious of their sudden arrival. But soon, unable to resist the temptation of the small bits of carrot ...

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