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People wearing surgical masks (also called face mask or medical masks or safety masks) walk through the city center of Milan, Italy on Feb. 23, 2020. Coronavirus disease COVID-19 pandemic
How Do Face Masks Control the Spread of Disease?
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10 Greatest Baseball Players of All Time
Florence, Italy Statue of David by Michelangelo
How a Rejected Block of Marble Became the World’s Most Famous Statue
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12 Greek Gods and Goddesses
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
Statue of Liberty in front of the skyline of Manhattan, New York City, New York.
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Camel at Khor Rori, Oman; mammal.
Do Camels Store Water in Their Humps?

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Ingenhousz, detail of an engraving
Jan Ingenhousz
Dutch scientist