Photographer Paul Nicklen and I are on a mission to capture images ... me about the polar bear’s condition, but nothing could have prepared me for what I saw. The bear’s once white coat ...

Polar bears aren't actually white. Their color is determined ... Underneath all that hair, polar bear skin is actually black. The black skin readily absorbs sunlight to keep the bear warm.

Grizzly bears, for example, are a subspecies of brown bear found in parts of North America. There are many different ...