Sony researchers have developed a refrigerator that only opens when you smile.
9
Castor oil is used as a lubricant in jet planes.
-5
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
The first alarm clock could only ring at 4 a.m.
120
Jumbo jets use 4,000 gallons of fuel to take off.
19
A small airplane can fly backwards.
75