In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Seven U.S. states are named after sovereigns - four kings and three queens.
5
The first semi-permanent settlements appeared in Florida around 5000 B.C.
10
During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
25
Theodore Roosevelt read at least one book every day.
22
In the US, it is legal for women to be publicly topless in 33 states. Male toplessness became legal in 1936.
4
The retail price for the iPad would be $1,140 if it were built by American workers instead of Chinese.
100
In Kentucky, US, every citizen is required by law to take a bath at least once a year.
699