Does your voice age?

Does your voice get worse as you get older? If so, how much and what can we do to keep it good for as long as possible? I think there's a lot of vocal teachers that are quite old that sing really well and opera singers too. Paul McCartney is still going strong at 78!

People lose some muscle tone and control as they age (which affects their entire body, including the voice). Continuing to exercise (again, both body and voice) is the best way to mitigate the effects of aging!