Transportation

According to the Department of Homeland Security 730 million people travel on passenger jets every year. Are these folks safe? Find out how high-tech solutions are being used to make flying as safe as possible.

By Jeff Tyson & Ed Grabianowski

There are about 5,000 planes in U.S. airspace every hour. How do these aircraft keep from colliding with each other? Learn about the intricate system that guides a plane from takeoff to landing.

By Craig Freudenrich, Ph.D.

How did the guy in the next seat pay less for a ticket than you did? Explore how airlines work, how ticket prices are set and more.

By Kevin Bonsor

In an office that cruises a mile or more above the ground, being an airline crew member can be tiring, but rarely boring. Find out how pilots and flight attendants get you from gate to gate.

By Tom Harris

Like trade ships of old, air-freight planes move anything that can be bought or sold. See how goods are shipped worldwide.

By Karim Nice

To most people a trip through customs is just another stop in an airport or a country's borders. But customs agencies do much more for their countries' governments. In fact U.S. Customs raises more revenue than any agency except the IRS. Find out why and how they do it.

By Tom Harris

At first glance, it looks like a high-tech scooter. But people who have tried out the Segway claim that it is much, much more. Find out what's going on inside the Segway and what makes it so unique.

By Tom Harris

The only passenger plane that flies faster than the speed of sound, and can get from New York to London in less than four hours, is calling it quits. Learn how this amazing plane works.

By Craig Freudenrich, Ph.D.

What does it take to build an ATV? We visited the Suzuki Manufacturing of America Corporation ATV factory in Rome, Georgia, to find out.

How does a speedometer in an airplane work?

It doesn't seem like twisted rope and wooden gears or levers would be able to produce the force and speed needed to launch heavy loads a great distance.

By Yara Simón

Although the amount of fuel may seem high, when you do the math, it's actually not so bad.

By Talon Homer

Contrails are those long white clouds that form in the wake of an airplane flying at altitude. What causes these contrails and what are they made of? Learn the answer to this question in this article from HowStuffWorks.

I would like to know how airplanes can fly upside down and do loops. How does the fuel get to the engine if the plane is upside down?

Thomas the Tank Engine is a merchandising phenomenon that includes small wooden train sets, video tapes, books, clothing, an official Web site and tons of fan sites. But wait, what exactly is a "tank engine" anyway?

How do the engines breathe in diesel submarines? Don't internal combustion engines need a lot of oxygen to run? Where would all of this oxygen come from when the sub is underwater?

Do commercial jets have locks on the doors and ignition keys? If not, what keeps someone from stealing them?

When flushing the toilet in a passenger airplane, I'm amazed by the huge noise it makes -- like a powerful vacuum cleaner. Can you explain what makes this noise?

When I was a kid, my Aunt had constantly flowing water from a natural spring down the hill. She said the water was pumped uphill using a hydraulic ram. This device ran constantly and didn't need any electricity! What is a hydraulic ram and how does i

How are people able to breathe inside a submarine? What do they do to keep the air breathable?

By HowStuffWorks.com Contributors

Steam engines powered all early locomotives, steam boats and factories -- they fueled the Industrial Revolution. Learn how the steam engine produces power!

By Marshall Brain & Yara Simón

Bearings are the invisible heroes inside many mechanical devices. Learn about all different kinds of bearings, including 5-foot ball bearings that keep buildings on solid footing.

By Karim Nice

Magnetic levitation trains, aka maglev trains, can travel much faster than even bullet trains, with less environmental impact. But they're very expensive to build. So, what's the future of maglev trains?

By Kevin Bonsor & Nathan Chandler

Right around the fall months you may have heard the phrase 'punkin chunkin.' Have you ever wondered what exactly that is, or how the machines that launch pumpkins work?

Tower cranes rise 150 feet in the air and lift up to 19 tons. Plus, they actually build themselves! They're simply amazing. Learn how these structures accomplish such feats.

By Marshall Brain