The life boat was patented in 1845!
29
A small airplane can fly backwards.
75
There are only 14 blimps in the world.
69
Energy is being wasted if a toaster is left plugged in after use.
21
In the early 1960's, Porsche commercially manufactured farm tractors.
24
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60