A Facebook researcher created a visualization of Facebook connections around the world . Using a sample of 10 Facebook friend pairs , he compared them with their current cities . The US has the highest concentration of Facebook friendships while Africa has the lowest .
A Facebook intern created a visualization of Facebook connections around the globe . Using a sample of 10 million friend pairs , he correlated them with their current cities . The U.S. has the highest concentration of Facebook friendships while Africa has the lowest .