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What factors into a long and healthy life?


National Geographic has a list of the five “Blue Zones,” where the world’s healthiest people live. Author Dan Buettner located places that had high numbers of those older than 100 years, as well as people who grew old without health conditions. Rolling Stone contributing editor Joe Levy, “American Ninja Warrior” co-host Matt Iseman and author Harlan Coben join Megyn Kelly to discuss.