A satellite map shows sprawling organic growth of Lagos, which has grown to about 21 million people from just 1.4 million as recently as 1970. (Photo from Flickr by SEDACMaps)

Alex is a cofounder and editor of The Seattle Globalist. He's a visual journalist whose work has been published by PBS, The Seattle Times, FRONTLINE/World and the Seattle Weekly.  Alex teaches journalism in the University of Washington's Department of Communication and recently directed the documentary film Barzan.