Mysteries

  • Why Do People Keep Their Accents?

    Why Do People Keep Their Accents?

    September 08, 2014 | Article

    Most infants begin learning a spoken language from the moment they're born. But as the brain becomes less flexible with age, it's difficult for children to master the sounds and intonation of a second language.
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  • The Mystery of the Sailing Stones in Death Valley

    The Mystery of the Sailing Stones in Death Valley

    September 02, 2014 | Reference

    Until recently, no one had ever seen the moving rocks at Racetrack Playa, but a new video shows the stones creeping across the desert.
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  • Why Is the Sky Blue?

    Why Is the Sky Blue?

    June 09, 2014 | Article

    Why is the sky blue? The light coming from the sun is made of many colors, each of which has a different wavelength.
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  • What Is Buttermilk?

    What Is Buttermilk?

    May 14, 2014 | Article

    Today, on National Buttermilk Biscuit Day (May 14), a lot of people may be wondering, what exactly is buttermilk?
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  • What Do Turtles Eat?

    What Do Turtles Eat?

    May 12, 2014 | Article

    Turtles, like the humans who love them, are a diverse bunch. There are over 300 species of this ancient reptile, and each one has its own preferred diet.
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  • Why Does Coffee Make You Poop?

    Why Does Coffee Make You Poop?

    May 08, 2014 | Article

    It's proven that the caffeine in coffee stimulates the brain, but there's something in a cup of joe that can also jump-start the other end of the body. That's right: Coffee can make you poop.
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  • Why Do Cats Like Boxes?

    Why Do Cats Like Boxes?

    May 08, 2014 | Article

    For pet cats, all the toys in the world can't compare to a simple cardboard box.
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  • Why Do Dogs Wag Their Tails?

    Why Do Dogs Wag Their Tails?

    April 28, 2014 | Article

    It's commonly believed that dogs wag their tails to convey that they are happy and friendly, but this isn't exactly true.
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  • Why Do I Bruise Easily?

    Why Do I Bruise Easily?

    April 28, 2014 | Article

    A contusion, or bruise, is a reddish-purple discoloration of the skin that doesn't blanch, or turn white or pale, when pressed upon.
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  • How Do Wind Turbines Work?

    How Do Wind Turbines Work?

    April 28, 2014 | Article

    One of the fastest-growing sources of energy in the world, wind turbines generate electricity without emitting greenhouse gases into the environment (unlike fossil fuels).
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