A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The cigarette lighter was invented before the match.
210
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
Attics were invented in Attica.
43
Sony researchers have developed a refrigerator that only opens when you smile.
9
There are only 14 blimps in the world.
69
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46