Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
Speed dating was invented by a Rabbi in 1999.
45
To get a song out of your head, try doing something like a puzzle or Sudoku.
13
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
The largest hotel suite in the world is located 22 stories under the surface in the Grand Canyon Caverns. One night for two people in this 65 million year old cave is $700.
4
The yin-yang pattern's earliest use is in Rome - not China!
125
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