Pandora, as I mentioned in class, is essentially an evolving music website. You enter a song or artist that you enjoy, and Pandora chooses other music that it thinks matches your choice. You can then tell it "no" or "yes" on each song (or you can give no opinion, if you're lazy), and it will modify its choices. I assume that with each answer, the fitness function is modified according to certain variables that a song is assigned. *I have not been paid by anyone to mention this website...but all my friends think it's really cool.