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Why Do Some Eggs Have Two Yolks?
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What Makes Popcorn Pop?
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What Bedtime Story Would You Tell?
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What Causes a Shooting Star?
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Why Does Hair Turn Gray?
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What Is a Prime Number?
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Why Is April 11, 1954, the Most Boring Day in History?
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How Does the Binary System Work?
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When Did the New Year’s Eve Ball First Drop in Times Square?
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Who Invented Rock and Roll?
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Who Was the First Person in Space?
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What Was the Lewis and Clark Expedition?
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Do All Heroes Have Superpowers?
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Why Do Some Years Leap Ahead?
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How Much Water Is In a Watermelon?
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How Much Do You Weigh On the Moon?
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How Did the Months of the Year Get Their Names?
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What Are Your Odds Of Winning the Lottery?
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How Far Can Butterflies Fly?
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When Is the Winter Solstice?