Whale oil was used in automobile transmissions as late as 1973.
56
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The life boat was patented in 1845!
29
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
A toaster uses almost half as much energy as a full-sized oven.
33
In the early 1960's, Porsche commercially manufactured farm tractors.
24
