Have you ever wondered how black lights, or mirrors work? This collection of articles will explain the workings of some of the most common inventions and innovations you come into contact with everyday.

How does an X-ray machine work?

X-ray machines are an indispensable part of medical diagnosis. Find out how they see right through you.

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  • How Sunglasses Work

    How Sunglasses Work

    Whether you're hitting the surf or the slopes or just spending a day on the lake, sunglasses are a must-have accessory. Find out if the $10 sunglasses are as good as the high-cost ones. See more »

  • How Tooth Whitening Works

    How Tooth Whitening Works

    In the past few years, tooth-whitening has exploded as the physical upgrade of choice. Unlike nose jobs and chin tucks, just about anybody can afford to try this at home. Learn about different whitening techniques and how they work, and decide if you should give it a try. See more »

  • How Underground Pet Fences Work

    How Underground Pet Fences Work

    Want to keep your dog out of the neighbor's yard but feeling guilty pulling out a leash? You might consider an underground or wireless pet fence. Learn how these fascinating systems work and why this specialized fencing industry is booming. See more »

  • How Zippers Work

    How Zippers Work

    Better than buttons? Maybe. Less time-consuming than laces? Definitely. As far as fastening mechanisms go, the zipper is a work of art. Learn exactly what makes up a zipper and how it all fits together so perfectly. See more »

  • Is glass really a liquid?

    Is glass really a liquid?

    Whether it's checking your look in a mirror or using a smartphone, we've come to rely on glass so much that it's nearly impossible to imagine life without it. But what exactly is this remarkable material? Solid, liquid or other? See more »

  • Quiz: Are you an expert at springing forward and falling back?

    Quiz: Are you an expert at springing forward and falling back?

    Shakespeare cautioned us to "Defer no time, delays have dangerous ends." Does daylight saving time have effects that have escaped our attention? Spend a few minutes with this quiz and see if you're a time bandit or a buffoon. See more »

  • Quiz: Could you survive among the patent trolls?

    Quiz: Could you survive among the patent trolls?

    These days, high-tech innovators have to be able to navigate the tricky world of patent litigation. Would you be ready if a patent troll came knocking? See more »

  • The Stuff of Genius Fan Quiz

    The Stuff of Genius Fan Quiz

    Stuff of Genius fans, here's your chance to show how big of a fan you are! Take this quiz and test your memory of episodes from the Stuff of Genius podcast. See more »

  • Who invented MP3s?

    Who invented MP3s?

    You probably listen to digitally encoded music on a regular basis, but have you ever wondered who pioneered the tech that allows you to carry thousands of songs in your pocket? See more »

  • Who invented sports drinks?

    Who invented sports drinks?

    When you think of sports drinks, chances are Gatorade comes to mind. But was it the first one? Or just the beneficiary of clever marketing? See more »

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