Quand la personne est née le nombre des os dans son corps est 300, mais ce chiffre tombe à seulement 206 lorsque il atteigne l'âge de la puberté.
A person has 300 bones in his body when born. However, that number drops to only 206 at the age of puberty.
The human stomach has to produce a new mucosal lining every two weeks otherwise it will digest itself.