What it is?? According to wikipedia.com. It…
refers to the idea that, if a person is one “step” away from each person he or she knows and two “steps” away from each person who is known by one of the people he or she knows, then everyone is no more than six “steps” away from each person on Earth.
Some of the result:
In 2001, Duncan Watts, a professor at Columbia University, attempted to recreate Milgram’s experiment on the internet, using an e-mail message as the “package” that needed to be delivered, with 48,000 senders and 19 targets (in 157 countries). Watts found that the average (though not maximum) number of intermediaries was around six. This finding is surprising, given the worldwide nature of the Internet.
Last week, I had experienced somthing like this. Except it’s only TWO Degrees. I knew friends of my friends (three cases). Then i thought “Six Degrees” may be possible!! huh?