Castor oil is used as a lubricant in jet planes.
-5
The first alarm clock could only ring at 4 a.m.
120
Kleenex tissues were originally used as filters in gas masks.
46
More than a billion transistors are manufactured every second.
-25
The blueprint for a floating city has just been approved by the largest port construction and design company in China. It's entirely self-sustainable, and extends underwater.
2
The life boat was patented in 1845!
29