Sardinia in Italy, one of the "Blue Zones" identified by Michel Poulain and BuettnerWe write a lot about longevity here at HuffPost UK; once you’ve written more than three articles on the topic, certain phrases and ideas bob up over and over like (fibre rich!) apples in the alleged fountain of youth. Expert after expert says that good sleep, exercise, eating well, and socialising are all key to a longer, healthier life. Science has their backs on those. But another cornerstone of longevity research – so-called “blue zones,” which include areas like Okinawa in Japan and Sardinia in Italy, and were identified by author Dan Buettner as being areas in which people are more likely to live