By Leon Symons, May 13, 2010
They smoke, drink, and are overweight. They are nearly 100 years old - and Jewish.
This week an Israeli-born academic revealed the secret: it's in their genes.
In London this week to speak to the Royal Academy, Professor Nir Barzilai, director of the Institute of Ageing in New York, discussed his pioneering 12-year study of 500 Ashkenazi Jews aged between 95 and an astonishing 112 years old.