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9 Questions About Gun Violence That We May Now Be Able to Answer

We're going to get a windfall of gun research thanks to Obama's new policy. Here's what we want to know.

Finally: A Transit Ticket on Your Smart Phone

Boston's commuter rail embraces the next big convenience in mass transit.

Scenes From London's Fiery Helicopter Crash

Two people were killed after a copter collided with a construction crane and fell to the street in Central London.

One Way to Keep Super Bowl Profits Local: Sell Off Every Last Bit of Material

An Indianapolis nonprofit is recycling more than five miles of banners left over from Super Bowl XLVI.

Meet the Newest Fleet of 'Green' Cars

Detroit rolled out the next generation of fuel-efficient cars at this year's Auto Show.

America Is a Walking Disaster

In much of the country, walking – that most basic and human method of movement, and the one most important to our health – is all but impossible.

4 Ways the Feds Are Making Transit Better

New funding rules should speed up major projects and increase local benefits.

Brooklyn's Affordability Crisis Is No Accident

Rents are skyrocketing in the borough thanks to inflexible zoning rules.

A Case for Abolishing Parking Tickets

A researcher argues that cities could make up the revenue and control parking demand without all those hated citations.

German Man Builds Device to Suck Electricity From Power Lines, Other People

Dennis Siegel claims his curious contraption feeds itself like a leech on ambient electromagnetic fields.

Anniversary of the Day: Boston's Great Molasses Flood of 1919

One of the weirdest and most awful things that ever happened.

Now You Can See Out the Bottom of Your Airplane

Or at least know what you're flying over, thanks to new Delta app.

The Bizarre Story of the Woman Who Stole a Stockholm Commuter Train

And then crashed it into an apartment building.

The World's Biggest Pop-Up City

As many as 100 million people could gather for Kumbh Mela in the northern Indian city of Allahabad.

UNICEF Wants Us to Talk About Urban Inequality

An online forum invites insight from the people who work on the ground in the world’s biggest and most dysfunctional cities.

A Breakdown of What Exactly Is in Beijing's Filthy Air

Climate Desk lays out the contents of China's air pollution.

Do Cities Really Take the Lead on Climate Change?

They may tend to adopt easier policies first, according to a new report.

NASA Satellite Image Shows Beijing Drowning in a Lake of Smog

Air pollution has been particularly bad in China this week, with levels nine times above what the U.S. considers "unsafe."

Would More Drivers Use Mass Transit if It Mimicked Private Cars?

Personal Rapid Transit tries for a comeback.