In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
223
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
23
In 1963, the US Military created an artificial ring around Earth, similar to that of the planet Saturn. The ring was made of copper needles and was used for worldwide communications in the case that the Soviets disabled all other methods of communication.
26
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
The United States consumes 25% of all the world's energy.
51