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      Knowledge is Power

      Scientific American June 2003

      A Polite Smile or the Real McCoy?

      How facial muscles reveal--and hide--emotion

      • By Carol Tavris on June 1, 2003

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      More in the June 2003 issue of Scientific American
      • Ask the Experts: June 2003
      • Data Points: Not All Wet
      • Prime Squares
      View Full Contents
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