An 81-year Harvard Study Says Staying Happy and Mentally Sharp Boils Down to 1 Thing – Online Marketing Scoops [Video]

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Despite all the sources of inspiration on the topic, it’s hard not to take notice of an authoritative, 81-year-long study conducted by the big brains at Harvard University. Known as the Harvard Study of Adult Development, it is one of the most comprehensive longitudinal studies in history.

Started in 1938, the Harvard …

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