Arctic ground squirrels (Urocitellus parryii) are highly vulnerable to climate change but might persist in climate-change refugia in Denali National Park, Alaska. Disclaimer: AAAS and EurekAlert!

If humanity is to become a spacefaring civilization, we'll need to sort out how to get a lot of sleep in space. After all, with today's technology, it would take around nine months just to get to Mars ...

Native to the Arctic and Subarctic of North America and Asia, they live in scattered colonies to help keep a watch for predators ...

Their brain waves go flat. Their body temperatures plummet to near freezing for some species (or even below freezing for Arctic ground squirrels). Yet amid all of this, the squirrels stay pretty ...

Comparison of body temperature pattern of a hibernating arctic ground squirrel (in blue) and a hibernating bear (in red) in Alaska. The decrease in the bear's body temperature is much less than ...