Who Was Leonidas?

SOCIAL STUDIES

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#2664

Why Do Pop Rocks® Pop?

ARTS & CULTURE

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#2663

What Makes Something Alive?

SCIENCE

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#2662

Who Is Lionel Messi?

ARTS & CULTURE

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#2661

Who Invented Tetris®?

ARTS & CULTURE

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#2660

What Is CONPLAN 8888?

SOCIAL STUDIES

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#2659

What Caused the Hong Kong Protests?

SOCIAL STUDIES

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#2658

Who Was Ruth Bader Ginsburg?

SOCIAL STUDIES

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#2657

What Is the Difference Between a Violin and a Fiddle?

ARTS & CULTURE

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#2656

Are There Ancient Viruses Trapped in Glaciers?

SCIENCE

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#2655

What Insect Can Mimic a Wasp?

SCIENCE

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#2654

Were Dire Wolves Real?

SCIENCE

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#2653