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Science | Engineering | 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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How BrainPort Works

Learn all about BrainPort, a device for sensory substitution by electrotactile stimulation.


How Biomechatronics Works

 How Biomechatronics Works

In the TV series "The Six Million Dollar Man," scientists restore a crippled test pilot, who lost legs, one arm and an eye. While this is total fiction, an emerging field known as biomechatronics is coming close to this vision. See more »

How Crossbows Work

 How Crossbows Work

The crossbow, a weapon popular with Wookiees, vampire slayers and some modern hunters, looks like a cross between a bow and a rifle. Learn how it was invented. See more »

How can someone control a machine with her thoughts?

 How can someone control a machine with her thoughts?

How can someone control a machine with her thoughts? See more »

How BrainPort Works

 How BrainPort Works

BrainPort is a device that sends visual input through the tongue of the sight-impaired. Learn how it works. See more »

How Biometrics Works

 How Biometrics Works

Biometrics technology identifies people based on physical or behavioral traits. Learn about biometrics and how this technology provides top-level security. 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 »

 I just saw a movie where the main character, a British secret agent, is revived after 30 years on ice. Are scientists actually working on this stuff?

I just saw a movie where the main character, a British secret agent has been "frozen." In the film, he is revived after 30 years on ice. My friend says scientists are actually working on this stuff. What's up with that? See more »

How CAT Scans Work

 How CAT Scans Work

CAT scans take X-ray imaging to a whole new level. Find out how a CAT scan machine uses 'slices' to form a 3-D computer model of a patient's insides. 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 »

How strong are the magnets in an MRI machine?

 How strong are the magnets in an MRI machine?

How strong are the magnets in an MRI machine? Can they pull a watch of your arm or even more? Learn just how strong MRI magnets are on this page. See more »