Each king in a deck of playing cards represents a great king from history: spades - King David, clubs - Alexander the Great, hearts - Charlemagne, and diamonds - Julius Caesar.
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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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Leonardo da Vinci could write with one hand and draw with the other at the same time.
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Ancient Romans at one time used human urine as an ingredient in their toothpaste.
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The ancient Egyptians bought jewelry for their pet crocodiles.
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English sailors were referred to as "limeys" because sailors added lime juice to their diet to combat scurvy.
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Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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