In the Middle Ages, patients were tended by nuns, who in between themselves called one another sisters. That name was later used for trained nurses.
Frogs never drink water! They absorb it through their skin.
In the middle ages, nutmeg was the most expensive spice. Not because of the taste and smell, but because of the belief that it protected against the plague.
Japan can boast about the oldest anthem on the Earth. Its text is from the 9th century.
0.85 liters of blood passes through the human brain every minute.
Honey is the only food that will never spoil.
