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Could Amazon Echo be the voice-controlled computer that will finally walk us into the future? Learn about the Amazon Echo at HowStuffWorks.

Thanks to inflation, there are more millionaires today than ever before. Find out exactly what makes a person a millionaire.

The Chevrolet Nova was one of the most successful compact cars of all time. Learn about every Chevy Nova model, plus pictures, prices, and more.

Keeping an allergen-free house is not an impossibility. Learn more about allergy-proofing your home.

The twin towers of the World Trade Center were true originals -- their history is one of innovation, persistence and grand ideas.

Guitar Hero has gripped video gamers as hard as they grip their axes. Find out more about how to play Guitar Hero and Guitar Hero's following.

LSD, also sometimes known as acid or Electric Kool-Aid, was the drug of choice for hippies. What made LSD so popular and what are acid trips like?

Believe it or not, the marvel we know as the helicopter began as a Chinese top consisting of a shaft - a stick - adorned with feathers on one end.

A vaccine is, essentially, a cure for an illness or disease. Who came up with the idea for vaccines and do we give too many shots now?

Cooking the books is a way businesses make things look better than they are in order to appease stockholders. Find out how cooking the books works.

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