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Tai chi is a form of soft self-defense that applies the principles of Taoism. Learn more about tai chi and how it can improve your heath.

In a track meet, how are false starts detected?

My friends and I really like to play paintball. How did it get started? Someone told me it was for military maneuvers -- is this true?

In a lot of movies you see windows that are 'bulletproof.' Does bulletproof glass really exist, and if so, how does it work?

The Chandler wobble is the change in the spin of Earth on its axis. Learn more about the Chandler wobble at HowStuffWorks.

Learn why, or whether, the WTC memorial project is behind schedule.

The FCC has adopted rules creating a non-commercial FM radio (LPFM) service. Learn how a school or individual can start one of these radio stations.

You think cell phone users are loud? Some of these animals can be heard for miles. See our list of 7 animals that can be heard for long distances.

Coronary heart disease is the most common form of cardiovascular disease, the leading cause of death. Find out how coronary heart disease works.

Is chocolate bad for your skin? Find out if chocolate is really bad for your skin at HowStuffWorks.

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