Polar bears are typically intensely solitary creatures, and the stunning footage of this documentary relays a behaviour which is highly atypical. Every September, residents of Kaktovik, Alaska, hunt and harvest a bowhead whale, Dozens of polar bears turn up to gnaw on the remains after the villagers have had their fill. Since this behaviour is a relatively recent phenomenon, some experts believe climate change is to blame. The documentary takes a look at polar bearsmaking their way onto human territory.