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After 50 Years, Boston's Charles River Just Became Swimmable Again

It took $500 million and nearly two decades of work. Here's how the city did it.

A Tour de France for Australia's Bike Commuters

Adelaide's Tour de Work has gotten at least 1,633 people to cycle to the office.

Distracted Walking Puts 1,500 People Into the Hospital a Year

Injuries to pedestrians on their cell phones have climbed steadily since 2005, according to a new study.

Edward Snowden, Pop Art Icon

Graffiti and street artists around the world find their latest inspiration in the beleaguered NSA whistleblower.

No, You're a 'Carpet Knight'!

The best old-timey insults from a new collection of long lost phrases.

Only 3 U.S. States Bother to Study How Sentencing Rules Affect Minorities

How an idea borrowed from the environmental movement could help narrow racial disparities in the prison system.

General Motors Came Back After Bankruptcy. Can Detroit Do the Same?

Answers to the questions we're all asking today.

Mesmerizing Animation of the Day: The Rise and Fall of a Paper City

As this video shows, an urban space is beautiful, complex, and fragile.

The Difference Between Chapter 9 and Other Types of Bankruptcy

Detroit is activating a specific section of the U.S. bankruptcy code that applies to municipalities.

Why Is the Baltimore Harbor Suddenly Murky White and Full of Dead Fish?

A mysterious (and disgusting) change in the appearance of the harbor water has locals scratching their heads.

Read the City of Detroit's Full Bankruptcy Filing

The city filed for Chapter 9 protection Thursday, the largest U.S. municipality ever to do so.

Go Ahead, Try Drawing an Outline of the Midwest on a Map

No one quite agrees on what counts as America's "Midwest," but its pattern of urbanization is one of a kind. 

If You Can't Bring the Beach to the City, Bring the City to the Beach

Kids from one of San Francisco's toughest neighborhoods find joy in the surf.

Victor Gruen Wanted to Make Our Suburbs More Urban. Instead, He Invented the Mall

How we ruined Gruen's plan for more walkable, tight-knit American downtowns.

'Blue Paint Is Not Enough'

London's bicycle advocates say they're fed up with a city government that promotes cycling but isn't serious about safe bike infrastructure.

Why Madrid Should Host the 2020 Olympics

Istanbul is everything the Olympic committee wants -- and everything it fears. Tokyo is boring. Really, there's only one choice.

America's Leading Venture Capital Area Codes

A more fine-grained look at the geographic centers of start-up investment. 

A Philadelphia School's Big Bet on Nonviolence

In a desperately poor, dangerous part of town, Memphis Street Academy decided to ditch its metal detectors and focus on supporting students. Violence dropped by 90 percent.

How to Fund Transit Without Raising Fares or Cutting Service

Mark Aesch brings a private-sector mindset to public transportation — and so far it's working.