Had a friend introduce me to this. These are links to the Voyager Golden Record that was affixed to the satellite in case it ever encounters unknown life in that infinite universe of ours. The record contains a selection of mixed media including greetings in a bunch of languages, selections of Earth music and sounds of the Earth. Directions are encoded on the cover in basic symbols. I certainly would have trouble working out the meanings personally, how do you do?
I also love listening to the audio. How would "Johnny Be Good" and birds chirping sound in a different galaxy?
Actual sounds from the record: (http://goldenrecord.org/sounds.htm)
Wikipedia explanation: (http://en.wikipedia.org/wiki/Voyager_Golden_Record)
