So you weep at sappy commercials and give drivers the bird. Have no regrets: emotion is what makes us human! Discover the survival value in feeling disgust … why humans are terrible liars … and how despair fuels creativity. Also, mis-firing emotions and the emotional consequences of facial paralysis. And why E.T. will need to feel fear and joy to survive. Guests:

Rachel Herz - Psychologist, author of That's Disgusting: Unraveling the Mysteries of Repulsion

Paul Ekman - Psychologist, professor emeritis, University of California, San Francisco

Kathleen Bogart - Psychologist, Tufts University

Gordy Slack - Science writer

Jonah Lehrer - Author of Imagine: How Creativity Works

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