The first alarm clock could only ring at 4 a.m.
120
A small airplane can fly backwards.
75
Castor oil is used as a lubricant in jet planes.
-5
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93
Originally, BMW was an airplane engine manufacturer.
69
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