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Reuters

Why Are Leaders Allowing the Destruction of Historical Sites in Islam's Holiest City?

The strange alliance of clerics and businessmen in Saudi Arabia.

All the Cities Photographed From the International Space Station

If your hometown's been shot by astronaut/prolific shutterbug Chris Hadfield, it's probably viewable on this interactive map.

Hugon Kowalski

Would More People Use the Public Library If It Had a Water Slide?

More than half of Poland doesn't seem to be reading anything. Would a more festive library design help them pick up a book?

MPI's Zara Matheson

Class-Divided Cities: Philadelphia Edition

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

See Japan Through the Eyes of the Country's Most Famous Anime Artists

A new online pop-culture travel magazine out of San Francisco's Japantown interviews artists about their favorite spots back home.

McKinsey Global Institute

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

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

Reuters

Even More Evidence Climate Change Will Hit East Coast Cities Particularly Hard

We could see seven times as many Katrinas every year.

Current Biology, Brown et al.

More Crazy Proof Birds Are Evolving to Live With Cars

This latest evolutionary trick by cliff swallows is particularly impressive.

Reuters

Bloomberg Swaps the War on Soda for the War on Cigarettes

The mayor is pushing a new city law that would force retailers to keep all their cigarettes stocked out of public view

Amazing Views From the Top of the World

Google Street View goes to its most extreme destinations yet: 4 of the planet's highest mountains.

Babak Golkar

Turning a Persian Rug Into a City

Babak Golkar makes architectural designs out of carpet patterns.

Reuters

10 Years After the Iraq War, How Has Baghdad Changed?

The city is bustling, with parks and nightclubs, but deep scars remain.

Arming Sisters

Lessons in Self-Defense for Women, From Tahrir Square

An American Indian woman living in Cairo wants to take what she's learned and bring it back to North American reservations.

Reuters

The Sequester Is Hitting the Country's Neediest Students the Hardest

Children from poor families and special needs kids are disproportionately impacted by the cuts.

A Pair of Nuts Fly Through Rio de Janeiro's Vertical Labyrinth

Extreme-sports enthusiasts Jokke Sommer and Ludovic Woerth take a hair-raising ride through Brazil's urban jungle.

Why We Just Might Want to Build Skyscrapers Out of Wood

Vancouver-based architect Michael Green is trying to convince the world to construct tall wood buildings.

UCLA

And the Cities Most in Danger of a Super-Flu Outbreak Are...

Researchers say lethal strains of influenza are most likely to arise next in coastal China, the Nile Delta and elsewhere.

Reuters

The Economic Case for Rail Subsidies

Service increases may pay for themselves through emissions reductions and safety improvements, even before factoring in congestion.

Reuters

It's Not Just Overflow—Everyday Leaks From Sewer Systems Lead to Alarming Amounts of Sewage in Our Waterways

And you probably can't even smell it.