A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The first alarm clock could only ring at 4 a.m.
120
Sony researchers have developed a refrigerator that only opens when you smile.
9
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
There are only 14 blimps in the world.
69
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Whale oil was used in automobile transmissions as late as 1973.
56