The first semi-permanent settlements appeared in Florida around 5000 B.C.
10
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
23
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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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
In the US, people can be rejected from joining the police force if they are too intelligent.
45
Alaska is the only state that can be typed on one row of keys on a QWERTY keyboard.
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