ARCTIC

Ecologist Chris Morgan and filmmaker Joe Pontecorvo decide to head out after an agitated polar bear begins to approach.

As loss of pack ice in Alaska's north increases, polar bears struggle to navigate an ocean of melting ice.

With help from its mother, a cub catches its first salmon at Brooks Range, high in the Alaskan Arctic.

Huge herds of caribou play an integral role in shaping Alaska's Arctic landscape.