'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
When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
It is impossible to hum if your nose is plugged.
366
Recycling one glass jar, saves enough energy to watch T.V for 3 hours!
118
There's a company in China that allows you to hire someone to stand in line for you for $3-$5 an hour.
14
Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
Most of the dust underneath your bed is actually your own dead skin.
251