An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Any modern jet is capable of breaking the sound barrier.
34
Sony researchers have developed a refrigerator that only opens when you smile.
9
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
More than a billion transistors are manufactured every second.
-25
The life boat was patented in 1845!
29
Kleenex tissues were originally used as filters in gas masks.
46

