Not the one I'm talking about Eh, that also comes under the genetic aging theory. Basically, the sophisticated mechanisms are switched off gradually as we get older. This is genetic.
They may simply function less and less efficiently as accumulating damage degrades their functioning.
No we definitely have the power to stop and reverse accumulating damage. It's what happens to us until we reach our twenties!
Maybe not. Maybe we are accumulating damage then too, but it only becomes apparent when the damage reaches a certain level.
No apparently there is scientific evidence that our bodies have a regenerating capacity for the years up to adulthood which declines with age.
Well its just not possible, and the only reason for this is that even though you may be biologic immortal, the chance for getting a devastating accindent is such that at average you'll grow to a healthy 500 years 'roundabout'. Think of carcrashes, explosions, taking an sudden dipe in a barrel acid...... (americans bombing your country to hell) :bugeye: And for the part of transporting our conscious to highly advanced computers, even they have a tendisy to fail, or get corrupted. And then im not even speaking about the sun swalling up our planet. So im my humble opinion this subject is mute.
OK... OK... I think the usual concept of "immortality" is thought of simply being immune to old age (and maybe disease also), being able to stay healthy and vigorous indefinitely. JRR Tolkien's elves were referred to as immortal in this context - but they could still be killed by fire, or thirst, or drowning, or starvation, or dismemberment, or whatever, and often were. They could even die of a broken heart.