The Arctic and Antarctic experience the most extreme seasons on Earth. Time-lapse cameras watch a colony of emperor penguins, transforming them into a single organism. The film reveals new science about the dynamics of emperor penguin behaviour. In the north, unique aerial images show a polar bear swimming more than 100km. Diving for up to two minutes at a time. The exhausted polar bear later attacks a herd of walrus in a true clash of the titans.

Originally released by BBC Worldwide Learning, 2006. Streaming video file encoded with permission for digital streaming by Infobase on April 20, 2018.

North and South Pole (1:35); --Spring in Antarctica (8:26); -- Winter Returns to the South Pole (6:14); -- Natives of the Arctic (5:58); -- Spring at the North Pole (7:48); -- Climate Change and Polar Bears (9:10); -- Next Generation of Penguins (8:38); -- Credits: Ice Worlds (1:02); .