Sagan and Hawking sing a duet to the Cosmos.
Or, rather, are made to sing a duet, mixed and re-mixed by melodysheep.
[youtube=http://www.youtube.com/watch?v=zSgiXGELjbc&border=1&color1=0x2b405b&color2=0x6b8ab6&hl=en&feature=player_embedded&fs=1]
Beautifully strange, just like the universe itself.
(hat tip to Dale at Faith in Honest Doubt)