Cheese in the categorization of these cheeses is their age. Fresh cheeses without additional preservatives can spoil in a matter of days. Content (double cream, goat, ewe and water buffalo) Some cheeses are categorized by the source of the milk used to produce them or by the added fat content of the milk from which they are produced. While most of the world's commercially available cheese is made from cows' milk, many parts of the world also produce cheese from goats and sheep. Some cheeses are described by their fat content. Double cream cheeses are soft cheeses of cows' milk enriched
The Moon is made of green cheese of this trope, and the assumption of their own naivete, to hide their smuggling activities from government officials. A 1902 survey of childlore by psychologist G. Stanley Hall in the United States found that though most young children were unsure of the Moon's composition, that it was made of cheese was the single most common explanation: Before that time, and since, the idea of the Moon actually being made of cheese has appeared as a humorous conceit in much of children's popular culture with astronomical themes (cf. the Man in the Moon), and in adult references to it. The Moon