Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
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
The US national public health institute, Centers for Disease Control and Prevention, has an actual plan in case of zombie invasion.
29
The United States has paved enough roads to circle the Earth over 150 times.
72
Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
70
In the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
7
