An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The first alarm clock could only ring at 4 a.m.
120
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46
The electric chair was invented by a dentist!
122
The IRS processes more than 2 billion pieces of paper each year.
28
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2