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Watch This Captivating Aerial Video of San Francisco

Swooping shots from extreme sports photographers.

Why Unemployment Has Hit Black Households the Hardest

The problem isn't just job loss. It's having no cash on hand when it happens.

Paris's Newest Lawnmowers Are ... A Flock of Black Sheep

It's all part of the city's new "eco-grazing" effort.

Urbanist Toolkit Bracket Challenge: Championship Round

This one's for all the marbles.

Will Somebody Please Make This Old-School Graffiti Video Game?

Real-life graffiti artists star in this fake 32-bit arcade game taking place in cities across North America.

4 of the World's Great Cities Like You've Never Seen Them Before

You probably didn't even know that watercolor comes in 3D.

15 Ideas for Making Amtrak's Northeast Corridor Better

The federal government has prepared a short list that includes 220 mph trains.

San Francisco's Trash Inspectors Get Up Earlier Than You Do

Behind the scenes of the city's aggressive campaign to monitor and educate people about exactly what should get thrown away.

For Cleveland, Climate Change Could Mean Tons of Toxic Green Algae

Heavy agriculture and global warming are aligning to produce nasty algae blooms in the Great Lakes, scientists says.

Parking Spots Are Replacing Vibrant Street Life in Yangon

The social life of Yangon takes place in sidewalk cafes. But they're in danger of disappearing as the city embarks on a road-widening effort.

How Long Must We Wait for the Bladeless Windmill?

A few years, at least. But the future is bright.

Bizarre Preservation Fixation of the Day: Ronald Reagan's Childhood Home

Two years of Reagan's youth wasn't enough to save this apartment house.

How Smartphones Could Revolutionize the Way We Heat and Cool Our Homes

Customers could run their appliances and manage their utilities from their mobile devices, cutting down on power use.

The Tallest Building in Chechnya Is Engulfed in Flames

No injuries have been reported.

China's Deadly Air Pollution Jumped 30 Percent This Year

In 2010, air pollution contributed to 1.2 million deaths and 2013 looks like it could be even worse.

Torrential Rains Douse, Flood Buenos Aires

At least six people were killed.

The Latest Bleak Evidence That Crossing the Street Is Hazardous to Your Health

Two new studies suggest you may not be safe inside a crosswalk.

John J. Gumperz, Who Mapped the Infrastructure of Spoken Language, Dies at 91

He pioneered the study of how people convey and conceal meaning and social standing with words, intonations, and accents.

Why Are There Still So Many Train Stations Named Penn Station?

The Pennsylvania Railroad isn't coming through that tunnel — so how come we keep going through its doors?