SIX DEGREES OF WHA? Have you ever thought "You know what really needs to be studied? The mathematics of Kevin Bacon?" I know I have. And how about combining that with support for the theory that Paul Erdos is the center of the mathematical universe? I give you the comprehensive article (from Wiki, naturally) on the Erdos-Bacon Number. Notable folks with finite Erdos-Bacon numbers include Natalie Portman, Mayim Bialik, Stephen Hawking, and Danica McKellar.