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How Massage Chairs Work
electronics.howstuffworks.com/gadgets/home/massage-chair.htm
Massage chairs are expensive chairs that allow you to receive a mechanical or robotic massage. Learn how massage chairs work.
How Smell Works
health.howstuffworks.com/mental-health/human-nature/perception/smell.htm
Smell is often our first response to dangers, such as fire and gas leaks. Learn more about the sense of smell and find out how the sense of smell works.
How Gas Compression-ignition Engines Work
auto.howstuffworks.com/gas-compression-ignition-engines.htm
HowStuffWorks talks to Mazda about the world's first gas compression-ignition engine and how the car company finally made the breakthrough.
How Calculators Work
electronics.howstuffworks.com/gadgets/other-gadgets/calculator.htm
Calculators may show up anywhere in our lives that numbers do -- from calculus class to restaurants. See how calculators work.
How Rice Cookers Work
home.howstuffworks.com/rice-cooker.htm
Burned chunks or gooey paste can be the disappointing result of rice gone wrong, but a rice cooker can even the odds for even the klutziest cooks in the kitchen.
Hearing Aid Basics
health.howstuffworks.com/medicine/modern-technology/hearing-aid.htm
Hearing aids are small electronic devices that amplify sound and help restore sound to the hearing impaired. Find out how hearing aids work.
How Air Conditioners Work
Air conditioning has fundamentally changed how people experience the world. When it's hot outside, walking into an air-conditioned house is like walking into another season. How do air conditioners keep us cool?
10 Antique Toys That Still Look Like Fun
entertainment.howstuffworks.com/10-antique-toys-that-still-look-like-fun.htm
Call them outdated or laud them for being 'vintage' but some toys just never go out of style. Learn about some fierce antique toys at HowStuffWorks.
How to Clean Synthetic Fabrics
Whatever happened to good ol' polyester? If all the different synthetic fabrics have you confused, read this article for tips and guidelines on how to clean many of the bunch.