Rapid shrinking of Arctic sea ice force polar bears into "marathon" swims to survive. Populations in the Beaufort Sea have declined 50 percent in a decade.
Recapping a discussion with biologist Dr. Nick Lunn while at the Churchill Northern Studies Centre on the fate of the Hudson Bay polar bear population
As Arctic sea ice continues its decline, nations vie for control of the region.
The Bush administration admits Polar Bears should be protected.