The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
Kleenex tissues were originally used as filters in gas masks.
46
Castor oil is used as a lubricant in jet planes.
-5
A small airplane can fly backwards.
75
Sony researchers have developed a refrigerator that only opens when you smile.
9
Originally, BMW was an airplane engine manufacturer.
69
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308