A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Kleenex tissues were originally used as filters in gas masks.
46
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Castor oil is used as a lubricant in jet planes.
-5
The ball on top of a flagpole is called a 'truck'.
24
The United States produces enough plastic film annually to cover the entire state of Texas.
13
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4