It’s funny how limited our minds were in the early days of space exploration. When NASA sent the Voyager probe out to deep space in 1977, they wanted to include an audio record of our civilization. They created one in the form of a gold-plated copper phonograph disc, designed to be played at 16 2/3 revolutions per minute. The disc contains spoken greetings in fifty-six languages, sounds of Earth nature and animals, and music from artists as diverse as Beethoven and Chuck Berry. It also features a number of digitally-encoded photos and diagrams. By current estimates, the Voyager 1 probe will be near another solar system in about 4,000 years.
Image credit: NASA