Space.com is carrying this article detailing how sound played a critical part in the formation of our universe. That's right, sound. Apparently the place rang like a bell for millions of years, and the ripples this caused in the space-time continuum are what ultimately triggered the formation of everything we see around us. This was all predicted years ago, but only very recently have devices sensitive enough to "hear" the last echos been created to observe the effect. But it is definitely there.