BRT-Lite in Lagos, zero-carbon in Masdar, recycling in Curitiba, and more.
Think of it as the world's largest public art exhibit.
There's a lot we still need to know about the strategic decisions that led authorities to shut down Boston for a manhunt.
If a major tsunami were to occur off the Atlantic coast, cities from New England to New Jersey could be hardest hit.
Mmmmmm... doughnut bikes.
People around Boston didn't stay inside Friday because the city forced them to. And this distinction matters.
Boston lifts its "shelter in place" order with the remaining suspect still at large.
The estimates at this early stage vary widely.
Let's not forget about the victims of this week's other major explosion.
The city conducted vivid, citywide disaster simulations in 2011 and 2012.
29 percent of the city's population is foreign born.
Boston area residents are holding their breath.
Much of last night's action took place in Cambridge and Watertown, a western suburb of Boston.
Boston area residents and business owners are being asked to "shelter in place" during this morning's manhunt. But what does that look like?
The rise of smart phones and WiFi mean we can now work from anywhere. Should that turn the entire built environment into an office?
All transit has been suspended; residents urged to remain in their homes. Police are conducting a door-to-door manhunt for second bombing suspect.
Earthquakes aren't the only thing to make the earth shiver.
British painter Nathan Walsh brings a photo-realism style to urban landscapes.
Nearly 70 percent of those fatalities were men; people over 75 were also at higher risk of getting hit.