are old people really old

I came across another interesting article which relates back to my previous project that ended up being about cells. The body is constantly renewing cells so in actual fact most of your body is only 7-10 years old. I think this is a really interesting fact and makes me think even more about the physical attributes that elderly people have. Their minds may be old, and they may appear and physically act as though they are as old as their mental age, but in fact their body has died and been reborn several times in their lifetime. Cells inside us are constantly dying yet we are completely unaware of it, we are regenerating continuously but for some reason this all stops, and the mind and brain die eventually. There is still massive scientific debate about why this regeneration doesn't continue forever, if they could work this out would it be possible that we could keep living forever....