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
Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
30
The average American spends a third of their overall time online playing games and using social networks.
298
The retail price for the iPad would be $1,140 if it were built by American workers instead of Chinese.
100
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
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
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
Saint Augustine, Florida, is the oldest European settlement in North America.
55