An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The cigarette lighter was invented before the match.
210
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Originally, Nintendo was a playing card manufacturer.
70
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7