Contour lines borrowed from natural terrain can tell us much about life in the city.
Critics of London Mayor Boris Johnson's ambitious air pollution plan may be missing the bigger picture.
A ban on outdoor gas heaters from Parisian cafés doesn't look like it will be implemented anytime soon.
Projects from Vancouver to Washington to Kathmandu.
Five winners will be announced this spring, but these ideas stand out above the rest.
5 percent of Tweets out of the city are in a language other than English.
Take on the role of violent agitators or the police in this atmospheric smartphone simulator.
Walkonomics looks at small things -- sidewalk quality, hilliness -- that make a real difference to walkers.
You may be more likely to spot a potential mate at a Walmart in a whopping 15 states.
The 1-gram listening device that flew like a dragonfly never really got off the ground.
Our understanding of food access seldom takes into account a key factor: mobility.
Hungary's MOVEO scooter looks like something baggage handlers might lose at the airport.
People in Napa, California, sure are satisfied. And the saddest places all swear too much.
Stay away from Sarasota, Florida.
Would you dissolve in fire or would your clothes simply ignite?
So you think you know your city?
Scientific hindsight shows that Google Flu Trends far overstated this year's flu season, raising questions about accuracy.
Though they look like a mess of humanity, the pits actually follow a set of rules.