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
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
The United States consumes 25% of all the world's energy.
51
No president of the United States was an only child for his parents.
51


