This video on YouTube (placed by 3ertin) describes the Voyager Golden Record. Nasar made a golden gramophone record with sound and images of what the culture and life on earth was like in 1977 and sent it out in space. The record demonstrates the earth's music and language and this video clip describes the venture. I wonder if aliens will like it? If it gets there in time - it might take 40,000 years............ is it in the right format?
Maybe we could send a revised edition in another format or are Aliens watching clips on YouTube now?