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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The first ever patent in the UK was Aaron Rathbone & Roger Burges, Map makers in 1618!
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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 predicted the mass use of solar energy as long ago as 1447.
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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.
13
The Mint once considered producing doughnut-shaped coins!
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When the Egyptians destroyed Libya in the 13th century B.C. they took 13,230 penises of the conquered enemies as trophies.
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The universally popular Hershey bar was used overseas during World War II as currency.
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