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Scientists predict we may lose half the species on the planet by the end of the century. They believe we have entered the sixth major ...
Actors:
Elon Musk,
Louie Psihoyos,
Jane Goodall,
Leilani Münter,
Charles Hambleton,
Joel Sartore,
Travis Threlkel,
Shawn Heinrichs,
Austin Richards,
Lester Brown,
Christopher W. Clark,
Paul Hilton,
Heather Dawn Rally