WGBH Boston Video: WG35499. "As seen on PBS." Special features: Access to the Evolution Web site; chapter search; closed captions. Liam Neeson, narrator.
Summary:
Great transformations focuses on the evolutionary changes that triggered the earth's incredible diversity. Extinction! explores why, then confronts a frightening notion: are humans causing the next mass extinction-- the sixth in the history of life on earth?
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