Overview: Witness the planet's breathtaking diversity -- from seabirds carpet-bombing the ocean to wildebeests eluding the wild dogs of the Serengeti.
Overview: On the unforgiving frontier of climate change, polar bears, walruses, seals and penguins find their icy Edens in peril.
Overview: Jungles and rainforests are home to an incredible variety of species like preening birds, intelligent orangutans and remarkable ambitious ants.
Overview: From fearsome sharks to lowly urchins, 90 percent of marine creatures live in coastal waters. Protecting these habitats is a battle humanity must win.
Overview: Cameras follow desert elephants seeking sustenance, bison roaming North America grasslands and caterpillars living the good life underground.
Overview: Venture into the deep, dark and desolate oceans that are home to an abundance of beautiful -- and downright strange -- creatures.
Overview: The need for fresh water is as strong as ever. However, the supply is becoming increasingly unpredictable for all manner of species.
Overview: Examine the fragile interdependence that exists between forests' wide variety of residents, including bald eagles, hunting dogs and Siberian tigers.