In 1967, Stanley Milgram started a research on how any person on earth can be connected to any other person using intermediate persons. These intermediate persons are friends or acquaintances of the previous person. He found out that at most 6 persons are needed in order for any two persons in the planet to be connected. This came to be know as the small-world phenomenon or 6 degrees of separation.

The small-world effect is very interesting especially in the world of information retrieval. No matter how unknown you are, the knowledge that you share to the world will eventually be found useful by someone else. This page is dedicated to the world-wide effort of information sharing.