Overview:Dr. Paul Zak joins Brian and Justin to talk about the chemicals that make us feel good, and experiments to determine which host listeners like more.
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First Air Date: Nov 24, 2009Last Air date: Feb 24, 2014Season: 1 SeasonEpisode: 219 EpisodeRuntime: 26:14 minutesQuality: HDIMDb: 10 / 10 by 0 usersPopularity: 19.1182Language: en
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