Well it is the changing climate that will ultimately thaw the perma-frost and destroy the tundra. It’s not a lack of big footed herbivores. So you’ll never have anything except a genetically modified elephant, but if we work hard on the climate issues we still have a chance to slow the thaw.

Yes, but... Can Bringing Back Mammoths Help Stop Climate Change? share.google/2yM220WB9UKC...

Fantasy. If we don’t stop and reverse the rise in global mean temperatures then all the mammoths in heaven and earth won’t be able to stop the thaw.