In 2011, a couple bought a box of textbooks for $10. Inside, they found a 25-cent bill signed by the president of the Republic of Texas, Sam Houston, and subsequently sold it for $63,250.
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In 1537, England's King Henry VII officially declared February 14th the holiday of St. Valentine's Day.
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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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Leonardo da Vinci was dyslexic, and he often wrote backwards.
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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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Early American humans hunted car-size armadillos and used their shells for houses.
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In the great fire of London, in 1666, half of London was burnt down but only 6 people were injured.
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