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While a dental bridge and a partial technically do the same thing, they work differently. Learn how dental bridges and partials are different.

They took thrash metal from the back rooms to the biggest stadiums. How much do you really know about Metallica?

Aspirin may be good for your heart, but will daily aspirin affect your skin? See if this is a home remedy do or don't.

Did your wool sweater get stretched out? If so, how do you shrink it back to its normal size?

Do you own Ugg boots? How did Uggs become so popular? Find out at HowStuffWorks.

You've probably seen Tibetan prayer flags fluttering in the breeze, but what do they symbolize and who should hang them?

Do you know how MOOCs work? Learn how massive open online courses work at HowStuffWorks.

You might be surprised at what some of today's biggest companies used to do. Here are 12 companies that completely reinvented themselves.

Just how far can the human eye see? There's no exact formula to figuring it out, but we do have an idea.

What does an automotive exhaust system do? Read about the purpose of your car's exhaust system at HowStuffWorks.

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