Get your conspiracy theories ready. This spooky TV documentary about the lost files from the Apollo 10 space mission suggests that there might be something out there on the dark side of the Moon.
While orbiting the Moon in 1969, these 'previously lost' recordings show that the astronauts on Apollo 10 heard some kind of strange music. Of course, the prevailing (reasonable) theory suggests radio interference. In 1969, it might have seemed strange and unexplained but after decades of space exploration, NASA has actually recorded similar sounds in different parts of the Solar System.