Ancient Greeks often carried their coins in their mouths, because the clothes did not have pockets.
The first computer was made in 1946 at the University of Pennsylvania. ENIAC (Electronic Numerical Integrator And Calculator) had 18,000 electronic pipes, 30 tons and it needed 154 m2 of space.
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 100 grams of butter, there are three times more calories than in the same amount of meat.
Playing chess without looking at the board, was known in Persia and India back in VIII century.
If there is a statue of a person on horseback in the park, and the horse has both front legs in the air, the person died in battle. If the horse has one front leg raised, the person died of wounds sustained in battle. If the horse has all of its legs on the ground, the person died of natural causes.
