I have to admit that I'd never thought about this one before. We love listening to our favorite artists here on Earth, but what would, say, Fleetwood Mac sound like on Mars (prior to Mick Fleetwood's head exploding ala "Total Recall")? After all, we're dealing with different atmospheric temperatures, densities and pressures. Nothing would be quite the same. As it turns out, Physicist Andi Petculescu and acoustics Professor Tim Leighton have already done just about everything short of actually blasting pipe organs into space.