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Forests

49min - Examine the fragile interdependence that exists between forests' wide variety of residents, including bald eagles, hunting dogs and Siberian tigers.

Fresh Water

49min - The need for fresh water is as strong as ever. However, the supply is becoming increasingly unpredictable for all manner of species.

The High Seas

49min - Venture into the deep, dark and desolate oceans that are home to an abundance of beautiful -- and downright strange -- creatures.

From Deserts to Grasslands

51min - Cameras follow desert elephants seeking sustenance, bison roaming North American grasslands and caterpillars living the good life underground.

Coastal Seas

50min - From fearsome sharks to lowly urchins, 90 percent of marine creatures live in coastal waters. Protecting these habitats is a battle humanity must win.

Jungles

51min - Jungles and rainforests are home to an incredible variety of species like preening birds, intelligent orangutans and remarkably ambitious ants.

Frozen Worlds

54min - On the unforgiving frontier of climate change, polar bears, walruses, seals and penguins find their icy Edens in peril.

One Planet

50min - Witness the planet's breathtaking diversity -- from seabirds carpet-bombing the ocean to wildebeests eluding the wild dogs of the Serengeti.