I just saw an interview with John Downer, a filmmaker who used spy cameras to capture polar bears in their natural habitat. You can see his footage on the Discovery channel, coming soon...
We've learned a lot about how animals have to get creative when their food supply disappears. This often means that they get in hot water with the humans that live near their habitats. For more shows on Discovery about polar bears and other kinds of bears as well, click on this link: http://animal.discovery.com/tv/bears/bear-shows.html