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Chelsea Wald

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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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    5 Things That Sound, Move, or Smell Like a Nuclear Explosion

    The Licorne (“Unicorn”) thermonuclear test; Fangataufa, French Polynesia; 1970CTBTO After most of the world’s nations signed the Comprehensive Nuclear-Test-Ban Treaty, in 1996,  they set up a new commission to watch out for clandestine explosions. Since then the commission (CTBTO) has wired the world with hundreds of seismometers, infrasound detectors, radionuclide sniffers, and underwater microphones. The […]

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    What Do Animals See in a Mirror?

    A controversial test for self-awareness is dividing the animal kingdom.

  • Wald_HERO

    What Do Animals See in a Mirror?

    A controversial test for self-awareness is dividing the animal kingdom.

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    Austria’s Ahead-of-Its-Time Institute That Was Lost to Nazis

    In 1911, Popular Science Monthly published an enthusiastic description of a young, private experimental-biology institute in Vienna, lauding its “remarkable scientific productivity resulting from only eight years of research.” The author, zoologist Charles Lincoln Edwards, attributed the success of the Biologische Versuchsanstalt (Insitute of Experimental Biology) to its many advanced experimental devices. The institute, popularly known […]

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    Lavatory Laboratory

    How sanitation is following the cell phone model.

  • Wald_HERO

    Lavatory Laboratory

    How sanitation is following the cell phone model.

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    The New Flight of the Ibis

    How a determined scientist taught an ancient species to migrate again.

  • Ibis2_HERO

    The New Flight of the Ibis

    How a determined scientist taught an ancient species to migrate again.