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Why Do Our Fingernails Keep Growing Until the Day We Die?
April 20, 2019 | ArticleYou may give them little thought beyond when to trim them or which nail color to apply. But the humble nail laid the groundwork for our evolution into the humans we are today.
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What Is Passover?
April 19, 2019 | ArticlePassover is one of the most important Jewish holidays. It begins on April 19 this year.
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What Are Stem Cells?
April 18, 2019 | ReferenceEmbryonic stem cells can morph into any cell in the human body.
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What Happened Before the Big Bang?
April 17, 2019 | ArticleThe Big Bang is commonly thought of as the start of it all: About 13.8 billion years ago, the observable universe went boom and expanded into being. But what were things like before the Big Bang?
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How Did Nearsighted People Manage Before Glasses Were Invented?
April 14, 2019 | ArticleBefore glasses were invented, how did nearsighted people manage in daily life?
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Can Any Animal Breathe Fire Like the Mythical Dragon?
April 13, 2019 | ArticleDrogon, Viserion and Rhaegal in HBO's "Game of Thrones" can breathe fire. But can any real animal pull off this fiery defense?
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Black Holes Are Awesome. Why Are Their Names Usually So Boring?
April 12, 2019 | ArticleBlack holes aren't usually named like planets, asteroids or comets are.
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What Exactly Is a Black Hole Event Horizon (and What Happens There)?
April 09, 2019 | ArticleThe event horizon is the threshold around the black hole where the escape velocity surpasses the speed of light. Here's what that means.
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What Do Cult Leaders Have in Common?
April 06, 2019 | ArticleWhat Do Cult Leaders Have in Common?
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Do Elephant Tusks or Rhino Horns Ever Grow Back?
March 31, 2019 | ArticleDo these valuable body parts grow back?
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