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Stackable cars could mimic the design of stacked shopping carts. Learn how stackable cars compact themselves and how the vehicles actually function.

Everyone cries. For some it's an emotional response, while others just shed tears when chopping onions. Are tears a way for us to cleanse our bodies?

Knowing how to set up an aquarium is vital to the survival of your freshwater fish. Learn the important initial steps of how to set up an aquarium.

The third-generation Pontiac Firebird emerged as America grew interested in performance cars again. Here, read about the 1982-1992 Pontiac Firebird.

The Volvo Your Concept Car is the first car designed with women in mind. Learn about the Volvo Your Concept Car and view pictures of the Volvo YCC.

Firefighters are our everyday heroes. Find out how to become one and look into the training process.

Endurance racing features the passing and maneuvering of shorter races, but its also demanding on the cars. Read more about endurance racing.

Getting rid of body acne can be tricky. Learn about how to get rid of body acne at HowStuffWorks.

A theremin is an instrument you can play without touching. Learn how a theremin works and the history of the theremin at HowStuffWorks.

Are you looking for some information on family guard dogs? Check out 10 family guard dogs to learn more on this topic.

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