An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
More than a billion transistors are manufactured every second.
-25
Originally, Nintendo was a playing card manufacturer.
70
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
Whale oil was used in automobile transmissions as late as 1973.
56