The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The first bomb dropped by the Allies on berlin in WW2 killed the only elephant in the Berlin Zoo.
-53
In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
28
A singing birthday card has more computing power than the allied forces in 1945.
30
The first telephone book was one page long and had only 50 names in it.
91
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
153