Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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Early Romans used to use porcupine quills as toothpicks.
27
During the Gold Rush in 1849, some people paid as much as $100 for a glass of water!
65
Until the nineteenth century, solid blocks of tea were used as money in Siberia.
80
During World War II, Uncle Ben's was the exclusive supplier of rice to the U.S. Armed Forces.
23
The universally popular Hershey bar was used overseas during World War II as currency.
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