The Manhattan Project changed the course of global history.
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The Ice Age allowed humans to migrate across land bridges.
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The eruption of Mount Vesuvius buried the city of Pompeii.
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The Cretaceous period ended with a mass extinction event.
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In 1942, a mistaken military exercise caused confusion along the U.S. West Coast.
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The Tuskegee Syphilis Study withheld treatment from participants for decades.
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Prehistoric sharks existed long before dinosaurs.
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The Sumerians developed one of the earliest known writing systems.
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In 1919, the Boston Police Strike left the city without law enforcement for days.
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