A quarter has 119 grooves on its edge, a dime has one less groove!
34
When glass breaks, the cracks move faster than 3,000 miles per hour.
47
Passengers on the Beijing subway can pay with plastic bottles.
29
In many countries, urine was used as a detergent for washing.
17
One human hair can support 3 ounces.
191
The best time for a person to buy shoes is in the afternoon. This is because the foot tends to swell a bit around this time.
49
Any domino can knock over another object up to 1.5x its size. The 32nd object would be big enough to knock over the Empire State Building.
18
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4