Maybe these words aren’t so far from impossible. There’s a debate brewing among scientists and conservationists about the possibility of “de-extinction”: the sci-fi, fantasy-like process of bringing back extinct species and re-introducing whole populations of them into the wild.

But it’s not a fantasy. Modern-day technology is getting  pretty close, and there’s just enough DNA sitting on ice out there that maybe—just maybe—we  could see the return of the giant Woolly Mammoth or the Dodo bird in a generation or two.

Not everyone’s happy about this, though. Some say that the money spent on trying to resurrect extinct animals would diverge much-needed funds away from currently at-risk species. On the other hand, scientists riding the de-extinction bandwagon say it’s our responsibility as human beings to bring back animals that we were responsible for eliminating in the first place.

What do you think? Do we have the responsibility to bring back extinct species, or is it a waste of time and money? 

To get more details about the movement and both sides of the argument, check out the National Geographic de-extinction page.