Blue Zones, where people reach age 100 at 10 times greater rates
My bet is blue zones are just places where they don't have good longevity records so you get a bunch of fake centenarians. That turned out to be the case in Japan: https://www.bbc.com/news/world-asia-pacific-11258071 and I think also in Greece.People were just keeping dead relatives "alive" for the social security or rent control.