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Who Drew the Nazca Lines in the Desert?
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Why Don’t Planes Fly in a Straight Line?
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Can You Read a Topographic Map?
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How Do Faucets Regulate Water Temperature?
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How Old Is Tic-Tac-Toe?
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How Many Cars Are on the Road at One Time?
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How Old is American Football?
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How Fast Can a Bullet Travel?
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How Do You Read a Map?
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How Does a Phone Work?
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Why Is the Internet So Slow Sometimes?
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How Do Animals Communicate?
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Are You an Innie or an Outie?
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Why Does It Thunder?
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Why Do the Seasons Change?
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How Long Is the Great Wall of China?
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Whose Fault Is an Earthquake?
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How Do You Play Dominoes?
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Can You See the Equator?
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What’s So Special About Your Fingerprints?