It's a sobering thought that Mick Jagger, once the embodiment of rebellious youth, celebrates his 80th birthday on 26th July.
Even more shockingly, Sir Mick's Rolling Stones colleague Keith Richards, once thought unlikely to see middle age, reaches the same milestone on 18th December.
So what happened? How do we explain the strange fact that Mick and Keith have apparently defied all the insurance industry's mortality tables and made it into a ninth decade?
It doesn't hurt that, for much of the past 60 years, Jagger and Richards have had access to
