[trebb]

I doubt that we can stop it - God did the tweaking when Adam and Eve proved they did not deserve immortality. We may find evidence that points towards super-long lifespans, but I doubt that He will grant us the knowledge to make all the right tweaks.

[TalonDJ]

but I doubt that He will grant us the knowledge to make all the right tweaks.

So far he has not denied us any knowledge (that we could find on our own). Even the apple thing was a choice.