World History

Which one of these inventions or discoveries happened most recently?

More Questions from World History
Who wrote "The Eighteenth Brumaire of Louis Napoleon" and "Das Kapital"?
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How old was Victoria when she was crowned Queen?
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What year did a U-boat sink the S.S. Lusitania?
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Which military leader won the most battles?
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The Tour de France bicycle race was first run in what year?
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What country did Ruler Aloisia Lavelua rule or govern?
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What was Ethiopia formerly known as?
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In what year did Mohammad Reza Pahlavi, the Shah of Iran, flee his country?
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