The first alarm clock could only ring at 4 a.m.
120
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
The American Automobile Association was founded for the sole purpose of warning motorists of police speed traps!
36
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
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
Kleenex tissues were originally used as filters in gas masks.
46
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46