The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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Genghis Khan exempted the poor and clergy from taxes, encouraged literacy, and established free religion, leading many peoples to join his empire before they were even conquered.
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In ancient Greece, tossing an apple to a girl was a traditional proposal of marriage. Catching it meant that she accepted.
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Cleopatra married two of her brothers.
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The U.S. motto, 'In God We Trust', was not adopted as the national slogan until 1956.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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