The life boat was patented in 1845!
29
A small airplane can fly backwards.
75
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
The electric chair was invented by a dentist!
122
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 oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
There are only 14 blimps in the world.
69
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4