A man earned 4 million airline miles for free without breaking any laws by using his credit card to purchase free-delivery $1 coins from the U.S. mint.
11
In many countries, urine was used as a detergent for washing.
17
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
More than 10% of the world's salt is used to de-ice American roads.
54
A quarter has 119 grooves on its edge, a dime has one less groove!
34
An iceberg contains more heat than a lit match.
73
The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
479