Sara Johnson

Sara Johnson is a former fellow at CityLab. 

Map of the Day: The Geography of Unmarried Mothers

Flagstaff, Arizona, had the highest share of new mothers that were unmarried and Cheyenne, Wyoming, had the lowest.

How to Build an Urban Icon ... Out of LEGOs

Brick City, released today, offers models of buildings and infrastructure that span continents.

Scenes From the Prague Explosion That Injured 35

A gas break is likely to blame.

Map of the Day: Pollution in California

A new interactive map ranks California zip codes based on factors including air quality, pesticide use, groundwater, and traffic density.

Meanwhile, in West, Texas: An Entire Town Must Dig Out From Rubble

Let's not forget about the victims of this week's other major explosion.

Scenes From Inside a City on Lockdown

Boston area residents are holding their breath.

Stark Stat of the Day: 47,000 Pedestrians Were Killed Between 2001 and 2010

Nearly 70 percent of those fatalities were men; people over 75 were also at higher risk of getting hit.

The Chicago River Is Now Running in the Opposite Direction

The river will flow temporarily into Lake Michigan, where it'll dump millions of gallons of raw sewage.

Real-Time Transit App of the Day: A Ballet of Buses in San Francisco

The SF Live Bus app adds a bit of whimsy to the highly practical world of transit arrival data.

The 71 Countries Targeted in Boston

Participants in the 2013 Boston Marathon hailed from across the globe.

An 'Eerie' Stillness Lingers in Boston

Locals on social media report a distinct lack of chaos, "just a feeling that everyone is focused."

Amazing Bathroom Fixture of the Day: The Street Map Sink

Haven't you always wanted to brush your teeth over the streets of London?

At Least We Have a LEGO Version of the Berlin Airport

A scale model of the troubled airport project was completed before the original.

How a Map Is Like an Op-Ed

Thanks to the open data movement, anyone can be a cartographer. Professor Laura Kurgan on geography as a storytelling tool.

Class-Divided Cities: San Francisco Edition

The 11th in our series exploring the class divides across America's largest cities and metros.

More Problems for San Francisco's New Bay Bridge Span

One-third of 96 recently tightened steel rods have snapped, and they can't be easily repaired.

Urban Explorers Think About Public Space Differently Than We Do

Author Moses Gates on what we should be able to access.

Tunnel Opening of the Day: Bypassing Highway 1's Least Reliable Stretch

Today marks the end of roughly 75 years of on-again-off-again road closures in a suburb of San Francisco.

Urban App of the Day: Compare Global Cities on the iPad

See how places compare based on population, household income, and GPD.