Conclusion. Bear ecologist Chris Morgan arrives in Kaktovik, a small town in northern Alaska, in early November. He observes polar bears subsisting on fat reserves while waiting for the opportunity to hunt on sea ice. In Barrow, the northernmost city in Alaska, he joins local hunters who face some of the same climate challenges as the bears. Come late spring, Morgan heads to the North Slope of the Brooks Range, where caribou congregate---and grizzlies feast.