We aren't separated from each other by six degrees, after all!. Stanley Milgram invented the term "six degrees of separation" after discovering in an experiment how closely interconnected social networks can be. The "six degrees" concept also inspired a play, a film, and a party game. The original study has recently attracted criticism, but now sociologists at Columbia University are planning to re-do the study over the Internet, using e-mail forwarding. Volunteers can sign up here.
[via Metafilter]