An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The United States produces enough plastic film annually to cover the entire state of Texas.
13
Energy is being wasted if a toaster is left plugged in after use.
21
Castor oil is used as a lubricant in jet planes.
-5
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
More than a billion transistors are manufactured every second.
-25