Castor oil is used as a lubricant in jet planes.
-5
The first alarm clock could only ring at 4 a.m.
120
More than a billion transistors are manufactured every second.
-25
The ball on top of a flagpole is called a 'truck'.
24
Jumbo jets use 4,000 gallons of fuel to take off.
19
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
The life boat was patented in 1845!
29