The fact that we've already proven cloning IS possible, despite a lot of the problems, shows that it will eventually be possible to do it. It's just a matter of when.
As for IF we should, I want to say yes, because we could learn a lot, but at the same time, it could be dangerous.
Agreed. It would be interesting to see if we COULD bring back a mammoth, in the interest of science. The kinds of things we could learn are numerous. Plus, it would help us deepen our understanding of genetics, and how animals lived in certain epochs.
I think that we shouldn't bring them back...they will bring deceases from which we won't be able to defend ourselves. They won't live the way they were made to...
Imagine a dinosaur in Times Square?
You're kidding me, right? Take a newborn tiger from his parents in the San Diego Zoo. Move him to a solitary enclosure in that big cats refuge in Florida. As he grows, he will act like a tiger because it is in his DNA to act like a tiger. He may not learn from his parents how to hunt and kill and swim and what have you, but he will learn from his base instincts. The same would apply with a revived species. While they would not have others of their kind to guide them, they would certainly learn from instinct.
Neanderthals actually had a bigger brain. They're also your ancestors if you're not from African descent. According to
this article from Discovery News they crossbred with Homo Sapiens. Which isn't really surprising because they were more closely related to each other than tigers and lions are while those can breed with each other too and their offspring can breed as well.
I only quoted this one post, but this response is to the entire "bring back neanderthals" thing. think of it this way. In almost every fantasy book I've ever read (and I've read lots), if there were more than two race of sentient creatures, there was at least some tension between them. If we introduced Neanderthals into the modern world, eventually they would learn our ways (maybe not for centuries, but they would eventually), and reach an intellectual level close to ours.
Today, we can't get along with people of the same species. We look down on people because of their
skin color. Imagine if we had two different races of "humans" or rather... humanoid creatures. It'd be terrible.