id author title date pages extension mime words sentence flesch summary cache txt news-005527 First Cells, Then Species, Now the Web | News | Notre Dame News | University of Notre Dame .html text/html 1710 66 59 As they come together, many networks seem to organize themselves so that most nodes have very few links, and a tiny number of nodes, called hubs, have many links. In a highly publicized paper in 1998, Dr. Duncan Watts, a sociologist at Columbia University, and Dr. Steven Strogatz, an applied mathematician at Cornell University, found that many networks exhibited what they called the small-world phenomenon, popularized in John Guare’s play “Six Degrees of Separation. cache/news-005527.html txt/news-005527.txt