Science's Greatest Mysteries S01E01 - The Far Side of the Moon

Why is the far side of the Moon so completely different from the surface we see?In 1959, a Russian space probe took the first ever images of the far side of the Moon. The iconic pictures shocked the science world, revealing it to be completely different to the visible side.
This documentary explores the mystery of the far side of the Moon and follows three different theories attempting to make sense of it. New science, and old lunar samples, could unlock the mystery.