According to recent discoveries, this is 2010,,the worlds only known immortal species is the Turritopsis nutricula or immortal jellyfish!

I had read an article where they were using 3d printing technology to basically create human organs.  Give it time and they can write a similar article about us.  "Immortal" as long as you don't get some nasty disease, hit by a car, shot, stabbed, fall off a building, die of something stupid like huffing gas, etc etc etc. 

I also saw a rather interesting article (w/ a documentary to boot) about dried pig bones and some other things giving people the ability to regenerate.  One man in particular had lost part of his finger.  Applied the dry mesh to it and it grew back.  It wasn't pretty as new tissue will always look funny next to old beat up sun dried and wrinkly tissue... but the guy still had the rest of his finger back.