Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
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
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.
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In the US, there are quite a few cities called Gaylord.
27
According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
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Saint Augustine, Florida, is the oldest European settlement in North America.
55
The retail price for the iPad would be $1,140 if it were built by American workers instead of Chinese.
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