 Carl Flessa is at the University of Arizona, but he opposes bringing back the woolly mammoth. Just because you can do it doesn't mean that it should be done. A genetically modified Asian elephant is not a woolly mammoth, and releasing such an animal into the wild would be arrogant and irresponsible. Who knows, Flessa says, what unintended consequences could result from a woolly mammoth-like creature roaming the earth again. Rob Stein in Pure News.