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How Long Should You Really Go Without Washing Your Jeans?

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Should jeans be washed often? Do you really need to wash them at all? Learn more about washing jeans in this HowStuffWorks article.

Tree Hot Dogs Are a Real Thing

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Food made from trees may sound odd, but it's not as unusual as you may think. Find out about cellulose in hots dogs from HowStuffWorks Now.

How Wind Tunnel Testing Shaped Vintage Dream Cars

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How did wind tunnel testing shape concept cars of the past? Learn more about wind tunnel testing and dream cars in this HowStuffWorks Now article.

What Is Your Soul Element?

play.howstuffworks.com/quiz/what-is-your-soul-element

Everyone has a soul, and every soul has an element that keeps you connected to the universe. Which of the four elements does your soul use to make it through life? Find out!

Which "Bones" Character Are You?

play.howstuffworks.com/quiz/which-bones-character-are-you

This popular crime drama has been on air for just about 11 years before its final season aired. Which of these unforgettable characters are you? Let's find out!

Can You Pass a True Dog Lover's Quiz?

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Dogs might be man's best friends, but many people know little about their behavior. Are you a true dog lover? Take this quiz and find out if you deserve Fido's love.

What Kind of Girl Is Your "Type?"

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Do you like the girl that wants to go out and party with you, or the one that makes you get home safely? Take this quiz and find out.

Can You Identify These Land Animals While They're Swimming?

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Humans live on land, and we love nothing more than a day at the beach. Why would it be any different for land animals? Doggie paddle your way through these photos of animals taking the plunge, and see if you can identify all of them!

Can You Get a Perfect Score on This Optical Illusions Quiz?

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The question is, can we trick your eyes to believe that the size of an object is different than it is? We'll be transparent -- we'll fool you with illusions, weird perspectives and horizon lines. Think you can get all of them right? Then start now.

Can You Identify All of These Firefighting Tools?

play.howstuffworks.com/quiz/can-you-identify-all-these-firefighting-tools

Firefighters often put their lives on the line protecting the lives and property of others. It's a good thing they have plenty of tools to help. If you know all about firefighter gear, from regular turnouts to wildland equipment, do you think you can name all the tools in this quiz? Jump in and find out!

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