08.05.08
6.6 degrees of separation
gnxp
With records of 30 billion electronic conversations among 180 million
people from around the world, researchers have concluded that any two
people on average are distanced by just 6.6 degrees of separation,
meaning that they could be linked by a string of seven or fewer
acquaintances.
http://www.washingtonpost.com/wp-dyn/content/article/2008/08/01/AR2008080103718.\