DEVICES

Ever wondered how that thing works? Explore the inner workings of many common devices and inventions, as well as those that aren't so common, such as compasses, gyroscopes and bug zappers.
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Can bug zappers help transmit diseases?

I've heard that bug zappers can actually help transmit diseases -- how does that happen? Once the mosquito dies, how can a disease it was carrying be transmitted?

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  • How Prosthetic Limbs Work

    How Prosthetic Limbs Work

    Your body is a remarkable piece of biological machinery, and your limbs are no exception. Did you ever wonder how prosthetic limbs are made and how they are controlled? And are scientists developing bionic artificial limbs? See more »

  • How Rail Guns Work

    How Rail Guns Work

    Rail guns leave gunpowder-based weapons in the dust (one can hit a target 250 miles away in six minutes). So why isn't the military using them? Find out how rail guns can be used and learn about the limitations of this technology. See more »

  • How strong are the magnets in an MRI machine?

    How strong are the magnets in an MRI machine?

    A friend of mine told me that his watch flew off his arm and was sucked into the MRI machine at the hospital. Could this really happen? How strong are the magnets in an MRI machine? See more »

  • How the Edison Awards Work

    How the Edison Awards Work

    The Edison Awards annually honor the best new, cutting-edge products, companies and business executives -- all in the name of the record-setting inventor, Thomas Edison. What exactly does it take to earn an Edison Award? See more »

  • How the Metric System Works

    How the Metric System Works

    Ever heard of a little unit called a femtometer? Can you tell us how much you weigh -- in petagrams? We know you can't, so hurry up and start reading. We have work to do. See more »

  • How Ultrasound Works

    How Ultrasound Works

    Ultrasound lets us peek into the human body to see everything from heart valves to a moving baby. But how do sound waves give us a picture? See more »

  • How Wind Tunnels Work

    How Wind Tunnels Work

    Wind tunnels are the unsung heroes of aerodynamics. Thanks to these breezy devices, we have safer planes, cars and space vehicles.They even provide some extreme fun for the adrenaline junkies among us. What's the deal with wind tunnels? Find out in this article. See more »

  • How X-rays Work

    How X-rays Work

    X-ray machines seem to do the impossible: They see straight through clothing, flesh and even metal, thanks to some very cool scientific principles at work. Find out how X-ray machines see straight to your bones. See more »

  • I've heard of bank robbers being foiled by a "dye pack" put in their money stash. What is a "dye pack"?

    I've heard of bank robbers being foiled by a "dye pack" put in their money stash. What is a "dye pack"?

    I've heard of bank robbers being foiled by a "dye pack" put in their money stash. What is a "dye pack"? See more »

  • Metric System Quiz

    Metric System Quiz

    Do you have Le Système International d'Unités -- that's the International System of Units to the rest of us -- all straightened out? Test your metric mastery in this quiz! See more »

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