Clocks made before 1660 had only one hand - an hour hand.
41
A B-25 bomber airplane crashed into the 79th floor of the Empire State Building on July 28, 1945.
30
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 first bomb dropped by the Allies on berlin in WW2 killed the only elephant in the Berlin Zoo.
-53
The Titanic is about as long as the Empire State building is tall.
174
In 1897, Bayer, who is the maker of Aspirin, marketed the drug heroin.
56
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 average life span of a peasant during the medieval ages was 25 years.
68