Mysteries

  • How Do Fossils Form?

    How Do Fossils Form?

    September 21, 2015 | Article

    Even plants and animals like to leave a good impression.
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  • Why Are Some Glaciers Blue?

    Why Are Some Glaciers Blue?

    May 30, 2015 | Article

    Blue-ice areas are patches of ice where wind and evaporation have scoured glaciers clean of snow.
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  • Amelia Earhart: Biography & Facts About Disappearance

    Amelia Earhart: Biography & Facts About Disappearance

    October 29, 2014 | Reference

    Amelia Earhart's disappearance during an attempt to fly around the world remains a mystery, but recent expeditions may have found clues to her fate.
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  • 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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  • How Do Tornadoes Form?

    How Do Tornadoes Form?

    May 12, 2014 | Article

    Tornadoes are one of the most destructive natural forces on Earth. Though scientists don't entirely understand how tornadoes form, they do have a good idea about the conditions that cause tornadoes to develop.
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  • What Are Sweetbreads?

    What Are Sweetbreads?

    May 12, 2014 | Article

    Contrary to what their name would suggest, sweetbreads are not sugary pastries. So, what are sweetbreads?
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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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