It’s time to let Sid go. | duncan1890/Getty Images
You may generally disregard unfamiliar faces as background characters in the movie that is your life, but almost everyone you care about was once a stranger. Aside from the people who have been in your life since you were born, every relationship has a getting-to-know you process where you transition from unknowns to knowns.
Strangers can bring so much meaning to everyday moments, in big ways and small ones. In her new book Once Upon A Stranger: The Science of How “Small” Talk Can Add Up to a Big Life, Gillian Sandstrom, an associate...
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