The first alarm clock could only ring at 4 a.m.
120
A small airplane can fly backwards.
75
Energy is being wasted if a toaster is left plugged in after use.
21
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
The IRS processes more than 2 billion pieces of paper each year.
28

