Grenades were invented in China over 1,000 years ago.
50
Cleopatra married two of her brothers.
47
Leonardo da Vinci could write with one hand and draw with the other at the same time.
56
No one knows who designed the first American Flag.
45
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
The great wall of China is 1,400 miles long!
44