'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
In 21 U.S. states, WALMART is the single largest employer.
13
Oak trees can live 200 or more years.
61
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
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
When glass breaks, the cracks move faster than 3,000 miles per hour.
47
To get a song out of your head, try doing something like a puzzle or Sudoku.
13
The number of text messages sent and received in a given day is greater than the world's population.
198