Not to kind of sway off topic here, but a form of immortality that you really do see in science fiction a lot is closer than you think and is even close to human trials.
http://www.ted.com/talks/mark_roth_suspended_animation.html
Suspended animation allows for a human to be alive, but not age at all. The applications for this are endless, and they've already seen positive results on a few animals. While this doesn't technically increase our life expectancy, it allows us to live past our probable death date.
http://www.ted.com/talks/mark_roth_suspended_animation.html
Suspended animation allows for a human to be alive, but not age at all. The applications for this are endless, and they've already seen positive results on a few animals. While this doesn't technically increase our life expectancy, it allows us to live past our probable death date.










