Arctic squirrels have evolved to adapt to the harsh winter in this region. They hibernate for about eight months a year, digging about a meter deep in the sand at the edge of rivers.
Their body temperature then drops from about 37°C to -3°C, and they significantly slow down the activity of their brain, lungs, heart and other organs - a state called "torpor" Researchers found a significant increase in ambient temperature, as expected in a region that is experiencing climate change with full force.