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Set-top boxes are a good bridge between the Internet and your TV. Find out how Amazon Fire TV works from HowStuffWorks.

How do fog machines work?

How does the oxygen sensor in a car work?

Is this the payment method of the future? No cash, no credit card, just your smartphone and your finger? Find out how Square works at HowStuffWorks.

How does St. John's wort work?

Career change programs can help you make a smooth transition into a job you love. Learn how career change programs work at HowStuffWorks.

Leprosy, or Hansen's disease, was the AIDS of the first millennium. Find out how leper colonies (leprosaria) worked at HowStuffWorks.

Do you whistle while you work, or do you have a case of the Mondays - every day? Learn more all about job satisfaction at HowStuffWorks.

Do anti-aging lights really work? Visit Discovery Fit & Health to learn about anti-aging lights and if they really work.

Do you think you have what it takes to be the next great casting director? Learn more about how casting directors work at HowStuffWorks.

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