An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The average car produces a pound of pollution every 25 miles!
18
More than a billion transistors are manufactured every second.
-25
Originally, Nintendo was a playing card manufacturer.
70
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
The life boat was patented in 1845!
29
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4