surely thats what we have already?
as more and more parts become replaceable, the life span increases.
i BELIEVE the natural life span of a human is 20-30 years!
http://en.wikipedia.org/wiki/Life_expectancy
the table in this also indicates the same thing
basicly around 20-30 average age, higher in some places, but then a jump up as the 20th century progresses.
wrinkles are due to the break down of the elastin in the cells, elastin only has a certain lifespan.
breeding age for a human peaks around 20-30, after a 10 year span of raising the kids, the older memebers of the groupd (40s) are a drain on resources.
it all points to a natural end of life, that we dont have to worry about anymore…
I think technology is moving faster than the again process