The Nextdoor App Is Making My Neighborhood Safer

My neighborhood is experiencing a crime wave. Just on my block in the last week, several packages were stolen from doorsteps and tires have been slashed on at least two cars. I found all of this out from an app that's quickly becoming our neighborhood's best security system. "I heard it from Fred two doors down" is… » 3/27/15 12:00pm Today 12:00pm

30 Previously-Unknown Species of Fly Discovered in Los Angeles

Nature doesn't end at the borders of a city — it's just transformed. That's why scientists are finding new animal species in urban areas, where the ecosystems favor scavengers, hardy weeds, and junk-eaters. It probably comes as no surprise that the sprawling city of Los Angeles is home to its own unique fly species. » 3/26/15 9:38am Yesterday 9:38am

The Secret Color-Coded Language of Graffiti Abatement

More than anything else in our cities, graffiti and its removal creates a dynamic, ongoing visual conversation that plays out across pretty much every urban surface. Over at Medium's Re:Form, Ian Besler investigates the process with Los Angeles's graffiti abatement program, which removed one square mile of graffiti… » 3/24/15 7:30pm Tuesday 7:30pm

No Cars Will Be Allowed on This Stately New Bridge in Portland

It was 1973 the last time a new bridge opened over Portland's Willamette River: a double-decker span with eight lanes of freeway. Times have changed. When the Tilikum Crossing Bridge opens later this year, it will be one of the few in the U.S. that's purpose-built for transit, bikes and pedestrians—no cars allowed. » 3/18/15 7:40pm 3/18/15 7:40pm

Would You Take the Bus If It Earned You Free Credits For Tolls?

There's a running joke in many American cities: The only way to make public transportation truly work would be to pay people to ride it. In Atlanta, that's kind of what a new pilot program is doing. For certain transit trips, passengers can now earn $2—but they can only use the money to pay tolls on a nearby highway.… » 3/18/15 6:40pm 3/18/15 6:40pm

Inside New York City's Most Mysterious Architectural Time Capsule

For the past half century, 190 Bowery has been a legend. The six-story, 72-room former bank building on the fringes of SoHo looked like a war zone on the outside, crumbling and covered in graffiti. And the inside, the home of a photographer with insane real estate luck—well—nobody really knew what was inside. Until now » 3/18/15 11:20am 3/18/15 11:20am

Our Cities Could Become High-Density Solar Power Plants

Solar energy has a dark side. Those gargantuan plants that sprawl out like deconstructed disco balls sacrifice valuable open space and put wildlife, and possibly human lives, at risk. A new study by Stanford researchers says that focusing our solar energy efforts in already-developed urban areas could yield more… » 3/17/15 5:35pm 3/17/15 5:35pm

Out on a Limb: The Future of Trees in Cities

Of all the environmental resources we take for granted, large, older trees might be near the top of the list. Not only do we rely on trees for oxygen and wood products, but about 180 different animal species rely on the hollow-bearing features of these trees for shelter, roosting, and nesting. Unfortunately, rapid… » 3/09/15 5:00am 3/09/15 5:00am

The Amazing Photos Taken By a Crazy Subway Tunnel Spelunker 

Gregory Berg will be the first to tell you that he's insane. The New York-based photographer and urban spelunker likes climbing tall buildings and sneaking underground to photograph the parts of the subway most people never want to see. These are both crazy things to do. But the photos? They're amazing. » 3/05/15 7:00pm 3/05/15 7:00pm

Welcome to the Rural Town That Wants to Build a Hyperloop Utopia

What do cities look like in the world of Hyperloop transit? Will supersonic travel turn our cities into vast, intermodal suburbs? And what about the edge towns that once bled into the country, fed by car travel—will they empty out and decay, eliminated by a new form of transportation that bypasses them? » 3/02/15 11:20am 3/02/15 11:20am