Just over two years <a href=" http://thesisawesome.com/skins/ ">buy retin a cream in uk ex</a> The pace of permafrost thawing is "accelerating," says Vladimir Romanovsky, who runs the University of Alaska's Permafrost Laboratory in Fairbanks. He expects widespread degradation will start in a decade or two. By mid-century, his models suggest, permafrost could thaw in at least a third of Alaska and by 2100, in two-thirds of the state.