No president of the United States was an only child for his parents.
51
In the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
7
The United States has paved enough roads to circle the Earth over 150 times.
72
The United States consumes 25% of all the world's energy.
51
The US national public health institute, Centers for Disease Control and Prevention, has an actual plan in case of zombie invasion.
29
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
Colorado switched mile marker "420" to "419.99" to stop people from stealing it.
37
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