Hostile Planet

A look at the amazing creatures that live on some of the Earth's highest mountains. With limited oxygen and extreme weather conditions, only the toughest will survive.

Beneath the surface of the Earth's oceans, find a world of extraordinary extremes, including crushing depths, stormy coasts, vast blue deserts, and crowded reefs. Witness how seals fend off sharks, and how orcas fight to survive.

In the grasslands, animals endure fires, freezes, floods, and droughts; bull elephants clash in mating battles; cheetahs and gazelles engage in a predator and prey dance in the Kenyan savanna; bison endure a blizzard while being pursued by wolves.

The north and south poles are home to the world's most ultimate survivalists, including Arctic wolves and polar bears, creatures that are tested to the extreme.