World History

Which one of these inventions or discoveries came first?

More Questions from World History
What currency does the former Soviet republic of Belarus use?
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In what year did Prince Albert, husband of Queen Victoria, die?
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What country did Idi Amin flee to during the war with Tanzania?
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Where was the first UN summit on the environment, air pollution and global warming held, in 1992?
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What year was the United Nations founded?
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Which king of the Franks reunited Western Europe?
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The first meeting of the United Nations took place in London in what year?
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In 1998, the European Union agreed upon a single currency called what?
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