An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The cigarette lighter was invented before the match.
210
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
Originally, Nintendo was a playing card manufacturer.
70
More than a billion transistors are manufactured every second.
-25
Jumbo jets use 4,000 gallons of fuel to take off.
19
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7