It goes deeper than that, however. There are markers to indicate if you're likely to introduce your friends to each other, forming a network or keeping chains separate.
"It may be that natural selection is acting on not just things like whether or not we can resist the common cold, but also who it is that we are going to come into contact with," Fowler said in a statement.
Link - via clusterflock
From the Upcoming Queue, submitted by knitmeapony.
i used to be a social butterfly, and then i got bitter, now i read neatorama a lot.