An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The ball on top of a flagpole is called a 'truck'.
24
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
Originally, BMW was an airplane engine manufacturer.
69
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