In the past few years there has been considerable interest in understanding the secrets of ageing with respect to centenarians and much hype but in essence little substantive evidence on the science of successful ageing. Nevertheless, there are some common features of centenarians with respect to lifestyle, nutrition and environmental factors which may have contributed to their longevity. In this assignment, outline the evidence that such identified factors contribute to human longevity. What other factors might also contribute to the longevity of centenarians and why?