In 1977, a group of scientists led by Dr Carl Sagan from Cornell University, created a record of humanity to send into space in an attempt to make us comprehendible to aliens.

The contents included 115 images and a variety of natural sounds, such as those made by surf, wind and thunder, birds, whales, other animals, among other things.

Dr Sagan said "The spacecraft will be encountered and the record played only if there are advanced spacefaring civilizations in interstellar space."

Guest: Jonathan Scott, author of The Vinyl Frontier