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
Kleenex tissues were originally used as filters in gas masks.
46
The cigarette lighter was invented before the match.
210
The Google driverless car has only encountered two accidents. The first it was rear ended at a stop sign, and the second was when a human was behind the wheel.
7
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0