Castor oil is used as a lubricant in jet planes.
-5
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 oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The first alarm clock could only ring at 4 a.m.
120
A toaster uses almost half as much energy as a full-sized oven.
33



