Kleenex tissues were originally used as filters in gas masks.
46
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
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47