According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
223
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
According to a 2014 study, 1 in 10 Americans think HTML is a sexually-transmitted disease.
8
During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
25
Seven U.S. states are named after sovereigns - four kings and three queens.
5