A Native American tribe in South Dakota collects bottle caps left by campers, using them as currency. Several banks in the area now recognize the caps as legal tender.
225
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
25
Al Capone's armored limousine, after being seized by the feds, was later used to protect Franklin Delano Roosevelt (FDR), 32nd President of the US, after the attack on Pearl Harbor.
20
The first semi-permanent settlements appeared in Florida around 5000 B.C.
10
The average American spends a third of their overall time online playing games and using social networks.
298
