Advancing the politics of public transportation and public spaces is not easy. Danish architect Jan Gehl and his firm Gehl Architects, however, have a track record of success with cities around the world.
What is the apt metaphor for a city? Machines? Insect colonies? In a new paper, physicist Luis Bettencourt says that if we look to the function of cities we find that they're essentially social reactors that obey universal mathematical parameters.