“ What I'm after is not living to 1,000. I'm after letting people avoid death for as long as they want to. ”
Your future self is watching you right now through your memories.
~ Aubrey De Grey
I think it's reasonable to suppose that one could oscillate between being biologically 20 and biologically 25 indefinitely.
Wikipedia was a big help for science, especially science communication, and it shows no sign of diminishing in importance.
My approach is to start from the straightforward principle that our body is a machine. A very complicated machine, but none the less a machine, and it can be subjected to maintenance and repair in the same way as a simple machine, like a car.