http://www.amazon.com/Linked-Everything-Connected-Else-Means/dp/0452284392 http://www.amazon.com/Linked-Everything-Connected-Else-Means... He was just joining

http://www.amazon.com/Linked-Everything-Connected-Else-Means/dp/0452284392 http://www.amazon.com/Linked-Everything-Connected-Else-Means... He was just joining up with the CS dept at ND when I was doing my msc there and I got to see him speak a few times. This is part of a general trend, we naturally appear to keep small social circles on average with a few "hubs" providing most of the connections to others. This is actually a pattern in distributions throughout the natural world, it's really an interesting topic to study.