In this photo taken Oct. 25, 2010 Yakutian horses are seen outside the caretaker's cabin at the Pleistocene Park, a 40,000 acre wilderness in northern Siberia, Russia. Russian scientist Sergey Zimov ... more 
In this photo taken Oct. 25, 2010 Yakutian horses are seen outside the caretaker's cabin at the Pleistocene Park, a 40,000 acre wilderness in northern Siberia, Russia. Russian scientist Sergey Zimov is trying to recreate conditions from the end of the Ice Age when this area was rich in wildlife and summer meadows. Zimov believes populating Siberia with grass-eating animals will regenerate grasslands, which are more effective at preventing the thaw of permafrost and slowing the emission of dangerous greenhouse gases. less 
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Associated Press | Photo By Arthur Max
Sun, Nov 28, 2010 4:44 AM EST