In Sardinia, and even more in Ogliastra, one of the five international blue zones, the number of people aged over ninety and in good health and good mental and physical shape is decidedly higher than average in the rest of the world. It isn’t just a question of genetic make-up. Other things that come into play are genuine food, made like it was in the past, the natural environment, the cultural and social context and the value of shared, handed-down 'memories’ of the past.