The legendary Carl Sagan would have been 75 this week, so here are a couple of autotune mashup vids of him:

Carl Sagan – ‘A Glorious Dawn’ ft Stephen Hawking (Cosmos Remixed)

Symphony of Science – ‘We Are All Connected’ (ft. Sagan, Feynman, deGrasse Tyson & Bill Nye)

You can check out more info and download mp3s at Symphony of Science