The Lykov family, in Siberia, Russia, lived completely disconnected from the rest of the world for 40 years, a la Rip Van Winkle, until they were discovered by a pilot & four geologists. An incredible story of the family who 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.