There's a cool video at New Scientist for all you math types.
Musician Michael Blake has composed a piece of music based on the Golden Ratio. The Golden Ratio is an irrational number whose decimal places go on to infinity. It has fascinated mathematicians, architects, artists, and musicians for two thousand years.
Blake assigned a musical note to each of the first fifteen digits and as the music plays he adds instruments to the composition producing a beautiful melody. Here it is:
Isn't it a rather startling coincidence that the mathematical structure of the universe should be musical? How did that happen?