Huh? Think of a healthy 30-year-old. Did she age since the time she was twenty? Certainly so.
Think of a healthy 20-year-old. Did she age since the time she was 15? (I'm trying to figure what exactly you mean by “aging” -- if you define it too broadly, then aging is not necessarily a bad thing.)
Think of a healthy 20-year-old. Did she age since the time she was 15?
Yes.
By aging I mean "changes in body and mind that normally come with passage of time".
Google's announcement, Time magazine rather sensationalist headline.
In any case, it's nice to know that Google set its sights to "challenge ... aging and associated diseases". Apple's Tim Cook:
For too many of our friends and family, life has been cut short or the quality of their life is too often lacking. Art is one of the crazy ones who thinks it doesn’t have to be this way.
One more step towards "world optimization".