An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
More than a billion transistors are manufactured every second.
-25
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
The electric chair was invented by a dentist!
122
