Smithsonian Magazine has a fabulous article about a Russian family found in the woods in Siberia in 1978, after decades of isolation.
The sight that greeted the geologists as they entered the cabin was like something from the middle ages. Jerry-built from whatever materials came to hand, the dwelling was not much more than a burrow—”a low, soot-blackened log kennel that was as cold as a cellar,” with a floor consisting of potato peel and pine-nut shells. Looking around in the dim light, the visitors saw that it consisted of a single room. It was cramped, musty and indescribably filthy, propped up by sagging joists—and, astonishingly, home to a family of five...