In the Siberian winter, strange snow mounds appear after the accelerated thawing of permafrost / Developing a clearer understanding of permafrost thaw risk in Alaska / Alaska's lakes and ponds reveal effects of permafrost thaw / Permafrost thaw threatens up to 3 million people in the Arctic / Permafrost thaw beneath Arctic lakes poses surprise pollution threat / Permafrost thaw impacts alpine runoff and water retention / Melting permafrost in Canadian Arctic town could lead to first climate refugees / Melting permafrost makes 'drunken forests' store less carbon / The frozen carbon of the northern permafrost is on the move--we estimated by how much / Protecting northern water supplies from toxic metals in thawing permafrost