I'd argue that's wrong. Some people (it helps to be rich) are figuring out how to stay biologically younger, longer. Just not smoking cigarettes is an obvious

I'd argue that's wrong. Some people (it helps to be rich) are figuring out how to stay biologically younger, longer. Just not smoking cigarettes is an obvious one, and now almost all of us don't smoke. Those who do, age faster. But there are hundreds or thousands of things one can do to slow down phsyical and mental deterioration over time. Unfortunately there are also hundreds of things that people hope will do that, which actually make no difference. Such is life. Aging is a process (or really, a set of processes) that happens to everybody, but it doesn't happen at the same rate. This is obvious just by looking at people, and more obvious to the scientist that cut people open after they die, and take a closer look.