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How Lie Detectors Work
people.howstuffworks.com/lie-detector.htm
Lie detection is a consistently controversial topic -- how can a machine tell truth from deception? Does everyone have the same physiological reaction when telling a lie? If so, how can some people "beat the box"? Find out what these devices measure and if they really can detect lies.
How GMs Hy-wire Works
auto.howstuffworks.com/hy-wire.htm
What's a car without an engine? A GM Hy-wire. There's no combustion, no linkages, and it has driver controls that work like a video-game joystick. See what you could be driving in the future.
How Removable Storage Works
computer.howstuffworks.com/removable-storage.htm
Removable memory has unchained us from our PCs -- we can now carry gigabytes of data wherever we go, in a device the size of a matchbox. Learn about the three major digital storage technologies.
How Prenatal Testing Works
health.howstuffworks.com/pregnancy-and-parenting/pregnancy/issues/prenatal-testing.htm
During a pregnancy, different kinds of prenatal testing are an important part of the process. See how prenatal testing protects both the mother and child.
How Speakers Work
electronics.howstuffworks.com/speaker.htm
The best amplifier, receiver and CD player won't do you much good, if you don't have good speakers. Speakers are the final step in the stereo process -- the key component that turns electronic data into sound.
How Maglev Trains Work
science.howstuffworks.com/transport/engines-equipment/maglev-train.htm
Magnetic levitation trains are becoming a popular transportation topic all around the globe. Learn about electromagnetic suspension, the most popular type of maglev train.
How Baleen Whales Work
animals.howstuffworks.com/mammals/baleen-whale.htm
Baleen whales have plates with coarse bristles for filter feeding. Learn how baleen whales differ from toothed whales that hunt squid and other prey.
How will landing on Mars work?
science.howstuffworks.com/landing-on-mars.htm
Landing on Mars will be one of the most dangerous and rewarding space missions. Learn how landing on Mars will further our understanding of space.
How Blowtorches Work
home.howstuffworks.com/blowtorch.htm
Blowtorches produce an exceptionally hot flame and harnesses that heat to mold and cut metal. Learn how the blowtorch revolutionized welding.
How Computer Animation Works
entertainment.howstuffworks.com/computer-animation.htm
Computer animation makes possible many things that could not be done with traditional animation. Learn about this fast-growing field from HowStuffWorks.