In the year 1900, the number of human population was 1.5 million, of whom a quarter lived in Europe.
When a man blows his nose, the air speed that comes out under pressure reaches 160 km per hour.
Playing chess without looking at the board, was known in Persia and India back in VIII century.
In India for Christmas, a small number of Christians are decorating banana trees.
Dried bananas have four times more nutrition than fresh ones.
In the Middle Ages, all believed as did Aristotle, that the heart is the center of intelligence.
