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How Does GPS Work?
electronics.howstuffworks.com/gadgets/travel/gps.htm
For less than $100, you can get a pocket-sized gadget that will tell you exactly where you are on Earth at any moment. As long as you have a GPS receiver and a clear view of the sky, you'll never be lost again. Learn more!
How Surround Sound Works
electronics.howstuffworks.com/surround-sound.htm
Learn about surround sound technology, get buying tips, read sound system reviews and compare prices and features on popular system models.
Why do you have two lungs but only one heart?
health.howstuffworks.com/human-body/systems/circulatory/two-lungs-one-heart.htm
The two lungs-one heart system evolved because that was all we needed to survive. Learn more about the evolution of the two lungs-one heart system.
How Aquaponics Works
home.howstuffworks.com/lawn-garden/professional-landscaping/aquaponics.htm
Aquaponics is the farming of both fish and crops in one system. The crops thrive on the fish waste. Learn more about aquaponics.
How Allergies Work
health.howstuffworks.com/diseases-conditions/allergies/allergy-basics/allergy.htm
If you've got allergies, you know the drill. Learn allergy symptoms, reactions and the immune-system mix-up we call an "allergy."
How Nerves Work
health.howstuffworks.com/human-body/systems/nervous-system/nerve.htm
Nerves are what sense the world around you and pass that information along to your brain. Learn about nerves and see how the nervous system works.
How the Nintendo 3DS Works
electronics.howstuffworks.com/nintendo-3ds.htm
The Nintendo 3DS portable video game system lets you play in 3-D without having to wear special glasses. See how the Nintendo 3DS works.
How Are Airplane Cabins Pressurized?
science.howstuffworks.com/transport/flight/modern/airplane-cabin-pressure.htm
Without the system that pumps unused air from an aircraft's engines into the cabin, passengers and crew would be unable to breathe at 30,000 feet. But how does that system work?
How the Sun Works
science.howstuffworks.com/sun.htm
The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. Learn about the sun.
How Backscatter X-ray Systems Work
electronics.howstuffworks.com/gadgets/high-tech-gadgets/backscatter-x-ray.htm
Do you know how backscatter X-ray systems work? Find out how backscatter X-ray systems work in this article from HowStuffWorks.