The first alarm clock could only ring at 4 a.m.
120
There are only 14 blimps in the world.
69
Whale oil was used in automobile transmissions as late as 1973.
56
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
More than a billion transistors are manufactured every second.
-25
The United States produces enough plastic film annually to cover the entire state of Texas.
13
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The life boat was patented in 1845!
29