NASA's Golden Record: The Sounds of Earth

Launched in 1977, the two Voyager spacecrafts were each loaded with a golden phonograph record documenting life on Earth should either probe ever contact aliens. Their mission was to explore Jupiter, Saturn, Uranus, and Neptune before floating out of our solar system into interstellar space, hurtling away from the sun at 17 kilometres a second. Famous space guy Carl Sagan called the project a "bottle in the cosmic ocean."
The recordings contain greetings in 55 languages, from Akkadian to Wu, as well as an assortment of sounds representative of life on earth, like a heartbeat, a mother kissing her child and the whistle of a train. The golden records also carry 90 minutes of music (not upped to SoundCloud, presumably for copyright reasons), including standards like Chuck Berry's "Johnny B. Goode" and Beethoven’s Symphony No. 5, First Movement.
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