The first alarm clock could only ring at 4 a.m.
120
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
Castor oil is used as a lubricant in jet planes.
-5
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
More than a billion transistors are manufactured every second.
-25