The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
16
The last time American Green cards were actually green was 1964.
60
Ancient Romans at one time used human urine as an ingredient in their toothpaste.
37
Early American humans hunted car-size armadillos and used their shells for houses.
12
A B-25 bomber airplane crashed into the 79th floor of the Empire State Building on July 28, 1945.
30
The universally popular Hershey bar was used overseas during World War II as currency.
112
No one knows who designed the first American Flag.
45
The life expectancy in 1900 was just 47 years.
49