An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The cigarette lighter was invented before the match.
210
The electric chair was invented by a dentist!
122
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
If a car is travelling at 55 miles per hour it will travel 56 feet before the driver can shift his foot from the accelerator to the brake.
25
Car airbags kill 1 person for every 22 lives that they save.
80