We've got a couple of theories.
Google Earth could help quantify urban gardens much better than advocates on the ground.
An artist's impossible city borrows landmarks from eight major cities, including New York, Chicago, London, Shanghai, and Taipei.
Grab tight your freedoms, America: The country's collective legislatures are unleashing a torrent of new regulations.
Some say it's a security measure — but others think it's a matter of money.
The percentage of accidents involving alcohol varies widely by city.
Two Chicago communities with similar stories see vastly different outcomes.
The city is getting soft.
Kuala Lampur, Chicago, Toronto, San Francisco, and Hurricane Sandy make this year's list.
Public spaces decked out in the season's finest.
Four percent of the country identifies as Jewish, Muslim, Hindu or Buddhist. A peek at where those communities are clustered.
It's been an eventful year for cartography.
Also, a Canadian city goes after bullies and a Chicago alderman takes the war on pigeons to a new level.
Our annual look at the extensive information now available from city governments, and the tools people are building with it.
Homicide rates have fallen significantly in some places. Does economic development deserve the credit?
And other metrophors.
Samuel Krueger believes he's identified a structure to L.A. that's not unlike Manhattan or Chicago's Loop.
With car ownership falling, taxis are more important than ever.
These maps track the movement of transit vehicles in various cities over the course of 24 hours.