Polar bears are found only in icy parts of the Arctic, and pandas live only in wet and cool bamboo forests in China. Many bears in the Northern Hemisphere hibernate when the weather is cold and ...

The only exceptions are pregnant females who go into semi-hibernation to give birth. Climate change is causing Arctic sea ice to melt earlier and freeze later, so polar bears are spending more ...

Wintertime also provides plenty of hunting opportunities for polar bears, so they don't hibernate, either. However, pregnant polar bears do dig dens to prepare for the birth of their cubs. They spend ...