Siberian landscapes suffer much from not having mammoths, sabertooth tigers and wooly rhinos. Half of Siberia could be productive arctic steppe instead of grim

Siberian landscapes suffer much from not having mammoths, sabertooth tigers and wooly rhinos. Half of Siberia could be productive arctic steppe instead of grim forest we see today (we don't because there's no business being there). See https://en.wikipedia.org/wiki/Pleistocene_Park https://en.wikipedia.org/wiki/Pleistocene_Park