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Even the Smartest Mathematicians Can't Solve the Collatz Conjecture

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The Collatz conjecture can be worked on by 9-year-old math whizzes, but it's flummoxed some of the greatest minds of the past century. Will it ever be solved?

What Is Number Theory?

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For many of us, a number is just a number, a bit of information that tells you, say, what time it is. But mathematicians look at that same number and divine relationships that underlie nature itself. Ready to enter the trippy world of number theory?

How Electric Cars and Hybrids Affect Your Health

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Some worry that the electromagnetic fields lead to cancer. Learn more about how electric cars and hybrids affect your health.

What Is the Chandler Wobble?

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The Chandler wobble is the change in the spin of Earth on its axis. Learn more about the Chandler wobble at HowStuffWorks.

What Field of Science Are You?

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Human curiosity has lead to the branches of science we use to understand the world. The same impulses that lead us from the trees to walk on our hind legs are the same impulses that lead us to explore space, split the atom, and understand our own bodies. What field of science are you?

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.

10 Historically Inaccurate Movies

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Historically inaccurate movies are laughable -- until you consider that someone takes them for the truth. Read about these historically inaccurate movies.

Could You Really Outrun a Tyrannosaurus Rex?

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OK, hop in your time machine, find a T. rex and challenge it to a race. Who'd win? Find out if you could outrun a Tyrannosaurus rex at HowStuffWorks.

The Voight-Kampff Quiz: How Much Do You Know About 'Blade Runner'?

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Step out onto the neon-lit streets of future Los Angeles, and pull your trench coat collar up against the incessant rain. How much do you know about "Blade Runner"? Take this quiz to find out.

11 Basic Math Symbols and How to Use Them

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Math is a language of symbols and equations and knowing the basic signposts is the first step in solving mathematical problems.

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