Facebook's fertile ground for social experiments, and it wasn't all that long ago that Yahoo tested the six degrees of separation theory using the site. Not to be outdone, Mark Zuckerberg's crew, with an assist from the Laboratory for Web Algorithmics of the Universita degli Studi di Milano, has done a little digging of its own to find out just how intertwined its 721 million users really are. Turns out, instead of being six degrees away from your favorite dancing actor, you're likely only 4.74 -- which was the average distance between any two Facebook users globally. Considering that
