Sony researchers have developed a refrigerator that only opens when you smile.
9
The cigarette lighter was invented before the match.
210
Castor oil is used as a lubricant in jet planes.
-5
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
The ball on top of a flagpole is called a 'truck'.
24
The average car produces a pound of pollution every 25 miles!
18
The United States produces enough plastic film annually to cover the entire state of Texas.
13