'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
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
240
Seaweed can grow up to 12 inches per day!
59
No piece of square dry paper can be folded more than 7 times in half!
26
Americans are responsible for generating roughly 20% percent of the garbage in the world.
29
About two hundred babies are born worldwide every minute.
237
On average, a disposable diaper can hold up to 7 pounds of liquid.
22
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