If you were to do a search for the Nairobi city slum of Mathare on Google Maps, you'd find little more than gray spaces between unmarked roads. Slums by nature are unplanned, primordial cities, the ...

With no comprehensive formal transportation system, Nairobi relies on its matatus despite their flaws. Photo credit: shankar s via Flickr This is your first of three free stories this month. Become a ...