In 1936, three years before WWII started, a Russian Orthodox family of four fled to the Siberian “snow forest” to escape religious persecution. The couple, Karp and Akulina Lykov, their 9-year-old son, and a 2-year-old daughter, only took a few possessions with them.
After a trek in the wilderness, they settled somewhere close to the Mongolian border, where they started building a succession of primitive huts. The Lykovs settled down there for good. They even had two more children, who were born in the wilderness.
The family spent their days hunting, trapping, and farming. The mother of the family, Akulina, died of hunger in 1961. She chose to feed her children.1Source:https://www.smithsonianmag.com/history/for-40-years-this-russian-family-was-cut-off-from-all-human-contact-unaware-of-world-war-ii-7354256/ But the family remained in the wilderness until a geologist discovered them in 1978. The Lykovs lived there without any form of contact with the outside world for 42 years.