The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
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
Any modern jet is capable of breaking the sound barrier.
34
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
A small airplane can fly backwards.
75
The United States produces enough plastic film annually to cover the entire state of Texas.
13
It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93