Addendum: Wonders Of The Solar System

I just discovered that symphonyofscience.com who is the awesome dude behind the Carl Sagan music videos just recently released a third installment of his science music. I think it's definitely better than the second one, and it also starts off with an amazing quote by Sagan. I know at least one person who likes this specific quote :)
But again, there are so many great things said in these clips, it's impossible to pick some favourites. Check it out:


'We could be in the middle of an inter-galactic conversation, and we wouldn't even know.'

Do you have any favourite scientific quote? What topic in science do you find most interesting/intriguing/important?