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    Our Cities Could Get a Whole Lot Smarter

    Pieces of SolaRoad, concrete blocks topped with solar cells, were recently installed in a bike path in Holland.SolaRoad Remember having to stay at home and wait for phone calls? (If you’re below a certain age, you can consult old movies, books, or TV shows—or just trust me on this.) It wasn’t so long ago that […]

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    Drug Users Are Secretive; Their Sewers Tell All

    In London’s waste system, like this stretch of the King’s Scholars Pond Sewer, concentration of urinary biomarkers for ecstasy is among the highest of any European city. Jon Doe via Flickr The sewage doesn’t lie.  People, however, are less than honest when asked about things like their illicit drug use. Each year, the National Survey […]