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Guitar pedals can create a variety of sound affects. Learn different guitar pedal techniques and types of guitar pedals at HowStuffWorks.

Only a few natural events pack the power to knock global civilization on its heels. One is a planet-killing meteor. Care to guess the other?

Digital scales are common measuring devices that harness several physical laws. Learn how digital scales weigh everything from peanuts to penguins.

True racing go-karts are serious competitive machines. Read more about go-kart racing at HowStuffWorks.

Gene patents allow companies and researchers to lay claim to sequences of genetic code. Learn more in How Gene Patents Work.

What's the secret to happiness? Learn about research in the area of happiness and what is the secret to happiness at Discovery Health.

Schizophrenia is often confused with split personality disorder. Find out exactly what schizophrenia is in this article.

Headaches are one of the most common medical complaints, but why do we get them? Find out what causes headaches and what the types of headaches are.

Both are destructive storms that can pack powerful winds and devastating storm surge. So how are they different? Or are they?

Do you have a strange phobia? Check out the top 10 strange phobias in this article from howstuffworks.com

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