A Blow for All the Crazed Cloning Efforts
Dolly Gets Euthanized because of seriously progressed lung disease (Dolly was the first successfully cloned mammal and was 6 years old). The researchers aren't saying whether she developed such bad trouble because of her cloned status or whether its just how things were meant to be for her.

But this will add tremendous fuel to the debate about whether cloning works like a xerox machine making copies of copies (or one of the several episodes of Star Trek in which civilizations survived by cloning alone and the gene pool became unstable) in that they eventually get too blurry to be of any use. But then, that's much less of an issue now with the super high quality copying machines available today. It is most likely just a question of time before cloning is perfected and we'll all have spare bodies waiting in the wings when these bodies start to fail. Heck, I can envision a time when we have different bodies for different purposes, like the running body, the sex body and the nobody (sorry, I could not resist).