The success of the world's first city-level carbon-trading system hasn't had much to do with emissions trading.
Europe's airplane activity in this visualization looks like a hive of angry, electrified bees.
The next-generation fare card will definitely be much more than a fare card. But what, exactly?
A 27-year-old woman was left as a newborn in restaurant bathroom, but now is tracking down her biological mom on Facebook.
Wendy MacNaughton cuts through the noise with Meanwhile in San Francisco: The City in its Own Words.
A dramatic art installation in Adelaide, Australia.
2013 saw 10.7 billion passenger trips, the highest in almost 60 years.
The fear of cancer from radiation exposure has led to a new set of problems for young families.
Watch as artist Mick Victor captures the 'chaotic order' of an urban landscape.
This may actually make sense, thanks to the city's unique street design.
Too often, racks are taken up by the carcasses of bikes that have long been abandoned.
No other country in the world rents housing the way South Korea does.
And why they're not likely to get everything they want.
The March 10 air raids were among the deadliest, most destructive attacks of World War II.
A round-up of the best stories on cities and urbanism we've come across in the last seven days.
Sanitation workers went on strike during the big event, leaving the streets covered in trash.
You can do a lot of things while high, but driving shouldn't be one of them.
Cyclists are 10 times likelier to be killed in South Carolina than in Oregon. What makes southern roads so treacherous?