For nearly two years, I've been reporting on longevity and the lifestyle choices that seem to help people live longer. There is steady interest — from everyday people to researchers alike — in what it takes to live a long, healthy life. In blue zones, the physical activity is a lot less vigorous, but centenarians still move daily, Buettner said in his Netflix documentary, "Live to 100: Secrets of the Blue Zones." 1 thing that can help you live a longer, happier life, according to an 86-year Harvard study that's still ongoing. "Having the right friends, that is the biggest secret to help these people in Blue Zones do the right things and avoid the wrong things."

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Persons: I've, Valter Longo who's, Longo, Dan Buettner, centenarians, Buettner, Dan Harris, Arthur C, Brooks, it's, Marc Schulz, Dr, Robert Waldinger, Ikigai, George E . Vaillant Organizations: CNBC, Netflix, Harvard, Development, Harvard Gazette Locations: England, Okinawa, Japan