In the early 1960's, Porsche commercially manufactured farm tractors.
24
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The electric chair was invented by a dentist!
122
More than a billion transistors are manufactured every second.
-25
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The United States produces enough plastic film annually to cover the entire state of Texas.
13
The cigarette lighter was invented before the match.
210