Castor oil is used as a lubricant in jet planes.
-5
If a car is travelling at 55 miles per hour it will travel 56 feet before the driver can shift his foot from the accelerator to the brake.
25
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
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
The first alarm clock could only ring at 4 a.m.
120