Castor oil is used as a lubricant in jet planes.
-5
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Kleenex tissues were originally used as filters in gas masks.
46
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Originally, Nintendo was a playing card manufacturer.
70
The ball on top of a flagpole is called a 'truck'.
24
