Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
People who laugh more are better able to tolerate pain - both physical and emotional.
36
You can immediately cool down a car that has been sitting under the sun by rolling down the window on one side and opening-closing the door on the other side 5-6 times.
23
To get a song out of your head, try doing something like a puzzle or Sudoku.
13
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31