The Science Behind Lie Detector Tests | How Do They Do It?
Find out the history of lie detectors, and how the modern polygraph machine works to catch people lying.
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Видео The Science Behind Lie Detector Tests | How Do They Do It? канала Discovery UK
Subscribe to Discovery UK for more great clips:
http://www.youtube.com/subscription_center?add_user=DiscoveryTV
Follow Discovery UK on Twitter:
http://www.twitter.com/DiscoveryUK
Видео The Science Behind Lie Detector Tests | How Do They Do It? канала Discovery UK
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