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.
The Open City group turns government data into apps on crime, snow plows, even lobbying efforts.
Access for all was one of the hot topics at The Atlantic's Start-Up City: Miami conference.
Ideas for enhancing safety, affordability, and quality of life.