Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153
The universally popular Hershey bar was used overseas during World War II as currency.
112
The first telephone book was one page long and had only 50 names in it.
91
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
The average life span of a peasant during the medieval ages was 25 years.
68
After Germany surrendered in WW2, people in Moscow partied until the entire city actually ran out of vodka.
66