The ball on top of a flagpole is called a 'truck'.
24
The IRS processes more than 2 billion pieces of paper each year.
28
The cigarette lighter was invented before the match.
210
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Castor oil is used as a lubricant in jet planes.
-5
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Google founders Sergey Brin and Larry Page have expressed their desire to see the search engine become artificial intelligence itself. To achieve that goal, they created the highly-protected “X lab.”
-7
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4