Castor oil is used as a lubricant in jet planes.
-5
The electric chair was invented by a dentist!
122
The ball on top of a flagpole is called a 'truck'.
24
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The United States produces enough plastic film annually to cover the entire state of Texas.
13
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1


