The universally popular Hershey bar was used overseas during World War II as currency.
112
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
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.
13
Originally, Du Pont, Inc. was a tiny gun powder mill in New Jersey.
20