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This all-new special is an "Encyclopedia Galactica" of non-Earth life forms, and an investigation into the latest scientific understanding of life beyond planet Earth. Aliens: The Definitive Guide showcases the extraordinary scientists who are currently grappling with extraordinary questions about alien life including: what will aliens really look like?; how will they sound?; what might their words look like; and, of course, will they come in peace? This two-part special takes viewers to stunning, remote locations on Earth as well as elsewhere in the universe.
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