In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
82
The first semi-permanent settlements appeared in Florida around 5000 B.C.
10
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
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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