To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
The first alarm clock could only ring at 4 a.m.
120
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 normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
In the early 1960's, Porsche commercially manufactured farm tractors.
24
A small airplane can fly backwards.
75