Even those pine trees in the Owens Valley die eventually.  Middle Ages
"average life span" was an average of all the infant and mother deaths,
the plague deaths, the gangrene deaths PLUS the deaths of the few who
escaped all of that and often lived to what we now call a "normal" life
span.  (What did Queen Elizabeth I reach?  70? 80? A long life by her
time standards.)
What WE need to do is stop abusing ourselves and hastening the process.
Too much sugar, too much fat, too much drinking, too many
drugs.............I wouldn't worry about programming my cancer cells.
Just about how to keep a few jumps ahead of them for another 15 or 20
years...........
Nan