Kleenex tissues were originally used as filters in gas masks.
46
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
The life boat was patented in 1845!
29
More than a billion transistors are manufactured every second.
-25
Jumbo jets use 4,000 gallons of fuel to take off.
19