McClatchy-Tribune: Ground here that for tens of thousands of years was frozen solid is terra firma no more. Across the tundra and coast of the Arctic Ocean, land is caving in. Soils loosed by freshly thawed earth set off a new era of rot, and of bloom – dumping a bonanza of nutrients into a top-of-the-world environment that swirls from months of midnight sun to deep-freeze dark. Will nature channel the nourishment of this soil into a great flowering of plant life that soaks up greenhouse gas and …