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There are animals that are 'sort of' immortal, it's called ""biologically immortal" and means cells that do not age;
http://en.wikipedia.org/wiki/Senescence

There are organisms with cells that do not age (or at least incredibly slow), so from the perspective of living it's not that impossible actually.



Well imo you shouldn't equal non-aging with immortal. Unfortunately I don't have the knowledge to really discuss here but AFAIK non-aging doesn't imply being immortal (not mentioning hostile conditions and so on of course)...

Enjoy your meal
Toast