The people that time forgot: Incredible story of Russian family cut off from all human contact for 40 years who didn't know about WWII and had to eat leather shoes to survive.

The Lykovs were Old Believers - members of a persecuted Russian sect

They left for wilderness after Karp saw brother killed by communists in 1936

Lived off land, ate leather shoes in harsh winter, unaware of WWII

Found in 1979 by Russian helicopter searching for spot to land geologists

The Lykovs were stupefied by modern goods like TV and cellophane

Tragically in 1981, three of Lykov children died, possibly of modern diseases