5 Ways Science Could Make Us Immortal  #2. Cloned Parts (or a
Whole New Body)  While no one reliable has ever cloned (or
claimed to clone) a human, it is scientifically plausible, and
as a result, it has been suggested as a means to allow humans to
sustain their lives beyond their normal mortal sell-by date.
The rest of us would rather be like Spam.  There are two ideas
at work here. The first is the prospect of manufacturing new,
healthy, completely "you" organs to replace the crappy old parts
you were born with, or even that next-generation organ you put
in 30 years ago, whenever they start to get old. Obviously, most
people die because a specific organ fails (for Americans, the
heart is the most common culprit). So being able to replace
parts like you would swap out transmissions on a car could
extend life indefinitely, even if nothing else on this list
comes to fruition. And organ-farming is the less morally
ambiguous cloning method, since it simply requires cloning
individual body parts.  The other meth