The first city in the World that has reached one million inhabitants was Rome, around 133 BC. London got its one million inhabitants in 1810, and New York in 1875. Today, there are over 300 cities with more than a million inhabitants.
In the year 1900, the number of human population was 1.5 million, of whom a quarter lived in Europe.
A single eagle claw has equal power of four human hands.
It is impossible to suck your own elbow.
0.85 liters of blood passes through the human brain every minute.
The first sewing machine was invented by a British inventor Thomas Saint in 1790 and it was used for sewing leather.
