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Are tattoos bad for my skin? Visit HowStuffWorks to learn if tattoos are bad for your skin.

The Cherry Chopper is a custom motorcycle with a stepped seat and straight pipes. See photos and specifications for this Harley-powered chopper.

The Girder Chopper's builders go to extremes -- this custom chopper is no exception. See photos and specs of Thee Darkside's modified motorcycle.

Hard Tail is a custom chopper mixing top-of-the-line parts for a one-of-a-kind chopper. See photos and specifications for this unmatched chopper.

A circular saw makes cuts in wood, metal, or plastic with a round, flat blade. Check out this article for tips on how to use this power saw.

A hand drill is often overshadowed by the more popular power drill, but is still useful for applications such as woodworking. Learn more.

Vegetable plants, particularly tomatoes, need some extra support to grow properly. Learn all about staking vegetable plants at HowStuffWorks.

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

Why do cats have whiskers? What are they for? Learn why at HowStuffWorks.

The 24-hour pH is a test that helps your doctor determine the factors related to your reflux. Learn more about 24-hour pH from Discovery Health.

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