Walnut fruit, the nut is grown in most of the temperate and mountainous areas of Eurasia. Known to all, it was already consumed by the Cro-Magnon man 17,000 years ago in Périgord.
Its kernels are eaten as snacks, in pastry, in the form of dough and its richness in lipids makes it an oil of predilection.
Nuts have given rise to many popular expressions and beliefs. It was dangerous to sleep under a walnut, and "nutty" is a common expression. Nuts has many meanings in the English language.