The first alarm clock could only ring at 4 a.m.
120
Kleenex tissues were originally used as filters in gas masks.
46
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1
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
Surgeons who grew up playing video games make 37 percent fewer mistakes.
250
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43