UFO sightings have reduced by over 80% since the introduction of smartphones and public access to HD video.
2
More than a billion transistors are manufactured every second.
-25
The first alarm clock could only ring at 4 a.m.
120
The IRS processes more than 2 billion pieces of paper each year.
28
Castor oil is used as a lubricant in jet planes.
-5
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12