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What if everyone on Earth jumped at the same time?

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The Earth is a pretty stalwart planet, having survived billions of years of punishment at the hands of asteroids and other cosmic bodies. But could it withstand more than 7 billion people jumping up and down in unison? Do we even want to find out?

The Ultimate Weight Loss Quiz

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Diets: You've tried them all, with mixed results. At least you know all about diets ... or do you? Test your diet IQ with this weight loss quiz.

How do you write the chemical reaction that takes place in a smoke detector?

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Chemical formulas provide a concise explanation for reactions. In this article, we explain the formula for the reaction in a smoke detector.

10 Fun QuinceaƱera Traditions

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In Latin American cultures, the quinceaƱera not only marks a girl's 15th birthday -- it also symbolizes her maturity. What are some of the celebration's exciting traditions?

This Physics Quiz Is Really Hard, So We'll Be Impressed If You Get Even 10 Right

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How will you REACT to this quiz? We're bringing in the big brains of physics to see if we can stump you. Do you have what it takes to pass without cheating?

10 Worst Ways History Has Repeated Itself

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As they say, if we don't learn from history, we're doomed to repeat it. And as these 10 historical events prove, humans seem to be more prone to repeating than learning.

Why Are Planets Almost Spherical?

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None of the planets in our solar system are perfect spheres, nor for that matter is our sun. Learn more about oblate spheroids at HowStuffWorks.

What is a compounding pharmacist?

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What is a compounding pharmacist? Learn how a compounding pharmacist allows a physician to prescribe a very specific medication to a patient.

The Milky Way: Understanding Our Place in the Galaxy

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A look at the night sky at any time of year will reveal a faint band of light stretching across the sky -- our solar system's home, the Milky Way. How much do we really know about it?

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