Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The cruise liner, 'Queen Elizabeth 2', moves only six inches for each gallon of diesel that it burns.
26
In a year approximately 900 million trees are cut down to make the raw materials needed for American pulp mills and paper.
-16
In Georgia, there is an airtight room called the Crypt of Civilization that was sealed in 1940. It contains numerous artefacts documenting what life was like at the time of sealing, and is scheduled to be opened in the year 8113 to show people of the future exactly what life was like.
13
Tsunamis ( tidal waves ) travel as fast as jet planes.
97
The worlds oldest piece of chewing gum is over 9000 years old!
122
Coins usually survive in circulation for about 30 years.
66
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4