Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
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
The United States has paved enough roads to circle the Earth over 150 times.
72
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
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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The first semi-permanent settlements appeared in Florida around 5000 B.C.
10
16 percent of Americans will receive one speeding ticket this year and it will cost them on average $150 per ticket.
42