Why you should smile at strangers
Friday, May 25, 2012 - 19:00
in Psychology & Sociology
By Stephanie PappasLiveScienceCHICAGO — Next time you're out walking about, you may want to give passers-by a smile, or at least a nod.
Updated by artificial intelligence Tue, 13 Jun 2023, 2:53:47 UTC Learn more
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