The first alarm clock could only ring at 4 a.m.
120
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
There are only 14 blimps in the world.
69
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
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
The IRS processes more than 2 billion pieces of paper each year.
28
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308