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
No president of the United States was an only child for his parents.
51
Seven U.S. states are named after sovereigns - four kings and three queens.
5
Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
76
There is a city in New Mexico called Truth or Consequences.
6
In the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
7