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Engineering

Engineering is the discipline of design and construction of mechanical devices, equipment, structures and public works systems. Topics include aircraft technologies, buildings, bridges, robotics and heavy machinery.

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How BrainPort Works

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

Wanted: One Well-dressed Android

A female Android designed to look like a 20-something Korean woman is capable of making facial expressions and holding a simple conversation.

How a Cold Heat Soldering Iron Works

As an invention, Cold Heat seems to have everything. But reviewers -- both professionals and average users -- either love the tool or hate it, and some people question whether it's really "new" at all.

How Biometrics Works

With the help of Q, James Bond can breeze through a security system that requires the villain's irises, voice and handprint. Biometrics isn't just for the movies. Real-life businesses and governments are using it. Check it out.

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.

What is a levee?

Whether they make you think of Hurricane Katrina or Led Zeppelin, levees are a critical safety feature for low-lying areas located near water. Why do they break?

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?

How the World Trade Center Worked

The twin towers of the World Trade Center were true originals -- their history is one of innovation, persistence and grand ideas.

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.

How Robots Work

A robot and a human being are made up of the same basic components. And with each passing decade, robots become more lifelike. Find out how robots operate and how close we are to artificial intelligence.

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.

How Water Slides Work

It's a leap of faith onto a curvy steep wet chute... Discover how water slides work and what draws thrill-seekers to them.

How Wave Pools Work

When the heat sets in, there's nothing like a day at the water park to cool things down -- water parks and their massive wave pools are a huge weekend attraction. Ever wonder what kind of machinery it takes to produce a wave? Learn exactly how an oce

How Intelligent Highways Will Work

If you were on the road for the holidays, you probably spent some time staring at the bumper in front of you. Can you imagine a world without gridlock?

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?

Can Bug Zappers Help to 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?

What Is the Tallest Building in the World?

Please settle an argument I'm having with my dad. He says the tallest building in the world is the Sears Tower in Chicago, IL. I think there's one that's taller. Is there?

Why are the insides of tunnels usually covered in ceramic tile?

I've noticed that the insides of road and subway tunnels are usually covered in ceramic tile. Is there any particular reason for this or is it simply convention?

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"?

How Building Implosions Work

Safe, professional building implosions combine mathematics, intuition and sheer explosive power. Find out how the experts bring down huge structures without damaging the buildings nearby.

How does a Galileo thermometer work?

One of my co-workers has an interesting thermometer on his desk. It is a glass tube with different-colored floating things in it. What kind of thermometer is this, and how does it work?

Is there any rhyme or reason to how U.S. interstate highways are numbered?

Is there any rhyme or reason to how U.S. interstate highways are numbered?

How does a rebreather work?

Unlike a regular SCUBA regulator which creates bubbles when the person wearing the apparatus exhales, a rebreather produces no bubbles when someone exhales. What exactly is a rebreather and how does it work?

How do truck weigh stations work?

While traveling along the Interstate, you may have noticed that truck weigh stations occasionally dot the highway. What are these weigh stations for, and how do they measure the weight of a truck? Find out the answer in this article.

How Snakebots Will Work

The serpentine qualities of snakes are the inspiration for a new type of robotic, interplanetary probe. Find out how snakebots will explore other worlds.

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