A small airplane can fly backwards.
75
More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43
Jumbo jets use 4,000 gallons of fuel to take off.
19
There are only 14 blimps in the world.
69
More than a billion transistors are manufactured every second.
-25
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