CNN takes viewers around the world in a two-part, four-hour documentary that examines our changing planet. This worldwide investigation, shot in high definition, looks at four key issues: climate change, vanishing habitats, disappearing species and human population growth.

To tell this story, Anderson Cooper, Dr. Sanjay Gupta and Animal Planet's Jeff Corwin traveled to some of the most remote and remarkable places on Earth. From exposing illegal wildlife trading undercover in Southeast Asia to seeing first–hand the devastating effects of deforestation in Brazil, they have gathered evidence on the unsettling changes taking place all around us.

Get a sneak peak of this dramatic documentary, featuring the exclusive new song from R.E.M., "Until the Day is Done".

Watch trailer with music from R.E.M. Go behind the scenes with the crew Watch outtakes


Anderson Cooper anchors Anderson Cooper 360º, an unconventional, wide-ranging Emmy Award-winning news program airing weeknights on CNN.

Complete bio Anderson Cooper 360º Send Anderson Cooper your feedback

The Animal Planet's Jeff Corwin has been working for the conservation of endangered species and ecosystems around the world since he was a teenager.

Complete bio Corwin's Quest

Dr. Sanjay Gupta is chief medical correspondent for the health and medical unit at CNN. Dr. Gupta, a practicing neurosurgeon, also works at Grady Memorial Hospital in Atlanta, Georgia.

Complete bio Your Health with Dr. Gupta Paging Dr. Gupta Blog

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