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What Is a Prime Number?
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Why Do Cicadas Emerge Every 17 Years?
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What Bedtime Story Would You Tell?
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What Causes a Shooting Star?
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How Can Spare Change Make a Big Difference?
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Can You Garden in the City?
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Why Do Some Eggs Have Two Yolks?
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What Is a Supernova?
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Why Is April 11, 1954, the Most Boring Day in History?
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Who Invented Rock and Roll?
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What Is the Birthday Paradox?
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Do All Heroes Have Superpowers?
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Why Do Some Years Leap Ahead?
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How Did the Months of the Year Get Their Names?
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Who Was Duke Ellington?
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When Is the Winter Solstice?
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What’s Your Favorite Kind of Chocolate?
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What Is the Giant Magellan Telescope?
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Can You Make Art with Candy?
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How Does the Binary System Work?