Eric Jaffe

Flickr/InSapphoWeTrust

Does Being 'Sister Cities' Really Mean Anything?

As with actual siblings, there's no one way to define the relationship.

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Do Bicycle Helmet Laws Really Make Riders Safer?

Typically, transportation laws promoting safety lead to an increase in public health. With bike helmet laws, the connection isn't so clear.

via arnesvenson.com

If a Photographer Takes a Picture of You Through Your Apartment Window, Is it Art?

A lawsuit against Arne Svenson, who captured unwitting subjects through their windows, could draw an important line between art and intrusion.

Reuters

The Case for Caution When It Comes to Building Streetcars

There are several reasons to be excited about streetcars — and several others to be skeptical.

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A Puzzling Relationship Between Same-Sex Parents and Gay Marriage?

Many of the highest percentages of gay couples raising children are found in states that ban gay marriage.

Reuters

The Forgotten Urban Transportation Problem We Should Be Trying to Fix

Freight is crippling metro areas, but it's rarely part of city planning.

Courtesy of Daniella Zalcman

Photographic 'Love Letters' to New York and London

Daniella Zalcman blends images of the two cities in a way that's both fantastical and haunting.

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How the Location of State Capitals Influences Political Corruption

Remote cities are especially vulnerable to scandal, according to a new study.

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A Quest to Save New York City's Disappearing Diners

Preservationist Michael Perlman, who calls diners "cornerstones of Americana," has a unique niche.

How to Save Water-Starved Cities

The key, according to a new report, is forming partnerships with farmers.

Crowdsourcing a City's Quiet Corners

A new app called Stereopublic is your guide to urban silence.

Photographing Tokyo's Coolest Escalators

Miha Tamura captures the extraordinary side of this everyday ride.

Celebrating L.A.'s Hidden Walkability

A two-day urban hike called the Big Parade reminds Angelinos that their city has a pedestrian culture after all.

What's Your City Watching on YouTube?

A new tool shows the geography of Internet distraction.

Why Historical Maps Still Matter So Much, Even Today

Mega-collector David Rumsey explains how maps are an "archive of information."

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How You Cross the Street Largely Depends on Where You're From

French pedestrians take more "risks" at crosswalks than the Japanese, says a new study.

Reuters

How Cash-Strapped Cities Will Handle Terrorism

At New York Ideas, Ray Kelly says we should be prepared for more cameras — and smarter cameras.

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The Uncertain Future of Public Roads

More and more states are privatizing highways and roads. Whether that's a good thing or a bad thing is a matter of increasing debate.

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Why Sewage Plants Are Especially Vulnerable to Climate Change

Nearly 11 billion gallons of waste spilled into waterways after Superstorm Sandy, according to a new report.