An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
The life boat was patented in 1845!
29
Car airbags kill 1 person for every 22 lives that they save.
80
Attics were invented in Attica.
43
Originally, BMW was an airplane engine manufacturer.
69
Any modern jet is capable of breaking the sound barrier.
34