Planet Earth

David Attenborough narrates this unique view of the planet from north to south.

Animals that have adapted to the special survival challenges of high-altitude life are featured.

Animals featured include snow geese, swimming monkeys, giant salamanders and river dolphins.

Cave systems around the world are home to geologic features and animals that remain largely unknown.

A tour of deserts features camels in the Gobi, guanacos in the Atacama and a bloom in Death Valley.

Animals living at the poles are featured, including killer whales, polar bears and emperor penguins.