This family did it for 40 years. Not a bad run: https://www.smithsonianmag.com/history/for-40-years-this-russian-family-was-cut-off-from-all-human-contact-unaw

This family did it for 40 years. Not a bad run: https://www.smithsonianmag.com/history/for-40-years-this-russian-family-was-cut-off-from-all-human-contact-unaware-of-world-war-ii-7354256/ https://www.smithsonianmag.com/history/for-40-years-this-rus...