And here is the film with English subtitles….. It is very watchable….
Back to the Ice Age – The Zimov HypothesisA documentary by Denis Sneguirev
In Siberia Sergey Zimov and his son Nikita are attempting to slow down the melting of the permafrost, which holds huge carbon reserves, by reintroducing large mammals present in the area during the ice age. It is a mammoth project driven by the faith and convictions of a small group of adventurer-researchers.