Russian Family Lived Alone For 40 Years,
There’s an absolutely fascinating account in Smithsonian magazine of a Russian family that lived in a remote part of Siberia with no contact with other people for 40 years from the mid-1930s until they were discovered in 1978:
The Lykov children knew there were places called cities where humans lived crammed together in tall buildings. They had heard there were countries other than Russia. But such concepts were no more than abstractions to them. Their only reading matter was prayer books and an ancient family Bible. Akulina had used the gospels to teach her children to read and write, using sharpened birch sticks dipped into honeysuckle juice as pen and ink. When Agafia was shown a picture of a horse, she recognized it from her mother’s Bible stories. “Look, papa,” she exclaimed. “A steed!”
But if the family’s isolation was hard to grasp, the unmitigated harshness of their lives was not. Traveling to the Lykov homestead on foot was astonishingly arduous, even with the help of a boat along the Abakan. On his first visit to the Lykovs, Peskov—who would appoint himself the family’s chief chronicler—noted that “we traversed 250 kilometres [155 miles] without seeing a single human dwelling!”
Isolation made survival in the wilderness close to impossible. Dependent solely on their own resources, the Lykovs struggled to replace the few things they had brought into the taiga with them. They fashioned birch-bark galoshes in place of shoes. Clothes were patched and repatched until they fell apart, then replaced with hemp cloth grown from seed.
The Lykovs had carried a crude spinning wheel and, incredibly, the components of a loom into the taiga with them—moving these from place to place as they gradually went further into the wilderness must have required many long and arduous journeys—but they had no technology for replacing metal. A couple of kettles served them well for many years, but when rust finally overcame them, the only replacements they could fashion came from birch bark. Since these could not be placed in a fire, it became far harder to cook. By the time the Lykovs were discovered, their staple diet was potato patties mixed with ground rye and hemp seeds.
More at the link