A Native American tribe in South Dakota collects bottle caps left by campers, using them as currency. Several banks in the area now recognize the caps as legal tender.
225
Theodore Roosevelt read at least one book every day.
22
In the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
7
The United States consumes 25% of all the world's energy.
51
The retail price for the iPad would be $1,140 if it were built by American workers instead of Chinese.
100
