I don't understand why scientists want to resurrect any creature that has died out; it's natural evolution, survival of the fittest, why mess with that?
Certain species didn't die out per se, more like hunted out of extinction. When we as a species had no regard for what was being done. The mammoth is one very visible animal, but there are dozens of species that have died out because of the direct impact mankind has done to their environment, not because of a "natural" evolution.
Ah yes, but you can also argue that based upon the "survival of the fittest" idea; man is the fittest so is that any different to one animal hunting another animal to extinction?
Animals don't hunt for sport and they certainly don't waste a thing... we on the other hand will kill a shark just for it's fins, or a Rhyno for it's tusk... we can also hun a disproportionately LARGE amount of animals, without regards for the prey/predator balance.
I saw last year a guy with a lynx in his vehicle, he'd hunted it and had it stuffed... I talked to him briefly about it, and the only thing that kept going through my mind is why anyone would kill such an animal needlessly. I've no problem with deer hunting or even overgrown populations of bears, but we have only been acting responsibly for the last 50 or 60 years...