In the early 1960's, Porsche commercially manufactured farm tractors.
24
There's an "anti-smartphone" called John's Phone which can only make and receive calls.
7
A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
The ball on top of a flagpole is called a 'truck'.
24
The life boat was patented in 1845!
29
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60