Car airbags kill 1 person for every 22 lives that they save.
80
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
Attics were invented in Attica.
43
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
The first alarm clock could only ring at 4 a.m.
120
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41