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The social evolution of smiling

Duration: 01:51

Katy Williams explores the evolution of smiling as a social tool and how its meaning has changed over time, and finds out just how unconscious an effect it can have those on the receiving end of a grin.

Available since: Wed 24 Oct 2012

This clip is from


Kate Williams explores the history and development of the modern winning smile.

First broadcast: 02 Jun 2012

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