Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
Harvard earns enough money from interest on its endowment that it could offer free tuition to every student and still profit.
13
There was once an undersea post office in the Bahamas.
241
An iceberg contains more heat than a lit match.
73
The first household refrigerators cost about $16,000, in today's money!
47
The hands of the clock on the back of the $100 bill are set at approximately 4:10.
72
More than 6,000 people with pillow-related injuries check into U.S. emergency rooms every year!
51