A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93
A small airplane can fly backwards.
75
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
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