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Reuters According to a new report, there are now 48,000 "large" dams around the planet.
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The Big Fix
How Can We Make Cities Quieter?
The best responses to this week's The Big Fix.
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Postcard
Postcard From Dongyang
Urine-soaked eggs as afternoon snack.
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The Wisdom of Wastewater Recycling
With new water-conscious projects, Burbank is becoming a model of water reuse.
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Photos
Fashion Accessory of the Day: Subway Map Cuff Bracelets
A sleek, sartorial way to show your love for public transportation.
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City Life, Recreated in the Sky
To Antony Wood's mind, the future of cities is vertical, replete with super-tall buildings, rooftop parks and, yes, lots of skybridges.
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Photos
The Ghosts of Philadelphia's Demolished Past
A photographer layers history over buildings that no longer remain.
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Videos
Whatever Happened to The Shweeb?
The whimsical plastic people-mover, a blend of monorail and recumbent bicycle, was a big enough idea to attract an investment by Google. So where is it now?
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Photos
Designing a City for the Deaf
A university in Washington, D.C., is developing a model for how urban spaces can better serve the deaf or hard of hearing.
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Why Energy Use Is Really Water Use
Pumping water from where it's abundant to where it's not takes a lot of energy.
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Photos
Paul Rudolph and the Challenge of Preserving Modern Architecture
A photographer sets out to capture as many of the architect's remaining buildings as he can, before they're gone.
