The first alarm clock could only ring at 4 a.m.
120
Kleenex tissues were originally used as filters in gas masks.
46
Jumbo jets use 4,000 gallons of fuel to take off.
19
Super Nintendo and Sega Genesis had an online multiplayer mode.
-2
More than a billion transistors are manufactured every second.
-25
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
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
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47