Tags: landscape, trees, hold, permafrost, thaws, near, altai, mountains, russia
Tags: abandoned, built, left, example, ravages, permafrost, foundations, dawson, city, yukon, canada
Tags: landscape, melting, permafrost, horton, river, canada
Tags: landscape, permafrost, titlis, glacier, engelberg, switzerland
Tags: space, phoenix, mars, lander, confirmed, presence, frozen, water, lurking, martian, permafrost, evidence, north, pole, region, circumstantial, chunks, bright, material, shadowed, seen, vaporized