Planet Earth
Ice Worlds
Season 1, Episode 6 · Aired 2006-11-05
Synopsis
Although the frozen worlds of the Arctic and Antarctic experience the greatest seasonal extremes, it is the advance and retreat of the ice that is the real challenge to life. As the sea freezes, Antarctica doubles in size and all animals except for the emperor penguin flee. In the Arctic, the polar bear's ice world literally melts beneath its feet, forcing it to swim vast distances and take on one of the deadliest adversaries on the planet.
In the series
This episode is part of Planet Earth (2006) on BBC/Discovery.
HD nature spectacle that made Earth look like an alien planet.
Key cast
- David Attenborough as Narrator