Live forever!

Scientist says its possible to reverse aging, allowing people to live for centuries. Kind of weird. I'm reading a science fiction story right now, "Dio" by Damon Knight, in which people are immortal, but they remain in a perpetual state of adolescence. In the real world, we're already in a perpetual state of adolescence, so bring on the eternal life! It's kind of strange the way this guy talks about "resetting" cells. Makes us all sound like machines.