Could resurrecting mammoths help stop Arctic emissions?

Mammoths kept northern landscapes from reverting from steppe to forest — which might be a key to preserving permafrost.

If you managed to time travel back to Ice-Age Europe, you might be forgiven for thinking you had instead crash landed in some desolate part of the African savannah. But the chilly temperatures and the presence of six-ton shaggy beasts with extremely long tusks would confirm you really were in the Pleistocene epoch, otherwise known as the Ice Age. You’d be visiting the mammoth steppe, an environment that stretched from Spain across Eurasia and the Bering Strait to Canada. It was covered in grass, largely devoid of trees and populated by bison, reindeer, tigers and the eponymous “woolly” mammoth.