Ageing or aging is the process of becoming older. This traditional definition was recently challenged in the new "Handbook of the Biology of Aging" (Academic Press, 2006), where ageing was specifically defined as the process of system's deterioration with time, thus allowing for existence of non-ageing systems (when "old is as good as new"), and anti-ageing interventions (when accumulated damage is repaired). - Wikipedia at: http://en.wikipedia.org/wiki/Aging Amy Sample Ward