Polar bears are living on borrowed time. Did you know they are descended from grizzlies? I didn't. They evolved to live and hunt on the frozen Arctic ice, eating a specialized diet of seal meat.But the winters are increasingly warmer, the ice is disappearing and raising a family has become a more difficult proposition.
Grizzlies, on the other hand, are masters at living off the land. As the two worlds meet, are the polar bears fated to become grizzlies once again?
As always, Nature offers astounding production values, and frankly when it comes to the "cute" factor, you can't beat baby polar bears!
For a video preview visit http://www.pbs.org/wnet/nature/arcticbears/index.html
On another note, thanks to all who have entered my One World, One Heart drawing! I'll be picking tomorrow and in touch with the winner!