World History

Which one of these inventions or discoveries happened most recently?

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What was published in Japanese newspapers every month from December 1941 to September 1945?
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Who reigned England from 1837 to 1901?
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What was a "Bombphleteer" in WWII?
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In which century did the French Revolution take place?
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In 1996, Nelson Mandela was appointed Chairman of which Community?
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What often caused the poor of Ancient Rome to riot?
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In what year did Australia become a federated nation?
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What city in Argentina was first established in 1536 by a Spanish expedition led by Pedro de Mendoza?
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