Into the Blue Zones: Dr Anna Spellman unlocks the secrets of longevity from those communities that live longest. Blue Zones are areas of the world where people are reported to live longest, and more often than not reach the ripe of age of 100 years of age. Initial interest in these centarians was prompted by scientists from Sardinia who noticed that some villages in the island’s interior had a lot of very old men and women. They used a blue marker to outline spots on the map where the long-lived clustered – hence the term ‘Blue Zones’. The idea was taken up…