continues: For this study, they and Christopher Dawes of UCSD used national data that compared more than 1,000 identical and fraternal twins. Because twins share an environment, these studies are good for showing the impact that genes have on various things, because identical twins share all their genes while fraternal twine share just half.

continues: "We found there appears to be a genetic tendency to introduce your friends to each other," Christakis said.

There could be good, evolutionary reasons for this. People in the middle of a social network could be privy to useful gossip, such as the location of food or good investment choices.

But they would also be at risk of catching germs from all sides -- in which case the advantage would lie in more cautious social behavior, they wrote in the Proceedings of the National Academy of Sciences.

"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.

I think a lot of popularity depends on how many drinks you buy for the house!

That's right ofcapri, Kind of like, "Don't bogart that joint my friend, pass it over to me" OR "Nothin' from Nothin' gets you nothin, you gotta have somethin', if you're gonna be with me"-billy preston

Or something in your jeans . . ?

That's where it all starts

Rock On chestnut501.