Castor oil is used as a lubricant in jet planes.
-5
The first alarm clock could only ring at 4 a.m.
120
The life boat was patented in 1845!
29
The Google driverless car has only encountered two accidents. The first it was rear ended at a stop sign, and the second was when a human was behind the wheel.
7
The electric chair was invented by a dentist!
122