Voyager's "Sounds of Earth" recordings

In a series of messages and sounds of Earth intended as greetings for any extraterrestrial beings the spacecraft might encounter during its decades-long sojourn through outer space, NASA launched Voyager carrying 12-inch gold-plated copper discs.

Containing greetings in 60 languages with samples of music and natural sounds of Earth's natural world, technician John Casani displays the "Sounds of Earth" recording before its installation on the Voyager spacecraft.