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Deciphering the stone was largely the work of two people, Thomas Young of England and Jean-François Champollion of France. Young was a physician, physicist, and all-around genius. He was the first to give the word “energy” its scientific meaning, and is remembered mainly for his study of light.
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World War I was one of the great watersheds of 20th-century geopolitical history. It led to the fall of four great imperial dynasties (in Germany, Russia, Austria-Hungary, and Turkey), resulted in the Bolshevik Revolution in Russia, and, in its destabilization of European society, laid the groundwork for World War II.
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