Sony researchers have developed a refrigerator that only opens when you smile.
9
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1
Castor oil is used as a lubricant in jet planes.
-5
The United States produces enough plastic film annually to cover the entire state of Texas.
13
The American Automobile Association was founded for the sole purpose of warning motorists of police speed traps!
36
More than a billion transistors are manufactured every second.
-25