According to the Center for Applied Research in the Apostolate at Georgetown University, in 2012 there were 54,018 religious sisters in the U.S.
Strictly speaking, only those in monastic communities are nuns, though this term is popularly used for all women religious (monastics and mendicants), members of institutes of consecrated life, and of societies of apostolic life.
900,365,670 nuns
Nurses are NOT typically called "sister or sisters", and would likely be seen as a put down in the US. However, many Nuns train to be nurses. Because they are Nuns, they are called Sisters.
There were many convents of Dominican nuns in Italy during the 16th century.
read it and find out
What loss of nuns?!? Nuns outnumber monks in many east Asian communities, such as Taiwan, and among Western Buddhists. In Theravada countries there have not been fully ordained nuns until recent times, so it is fair to say that the number of nuns is growing there, not shrinking.
No, nuns do not have to cut their hair as part of their religious practices. Many nuns choose to keep their hair long as a symbol of their dedication to God and their religious vows.
1. go to: www.google.com 2. type in the search bar: statistics on the population of monks and nuns in the US 3. click search 4. (I think you can handle the rest!)
Monks and nuns are cloistered religious, and, as such, do not normally leave their monastery. The biggest thing that monks and nuns have provided in the way of "social services" would be education, they were really the first public education provided to the laity. They, also, in their Scriptoriums kept literature alive by their saving copies of many works of antiquity which otherwise would have been completely lost to us.
They are supposed to wear habits, but many choose not to.
There are many Marys who were nuns. Please be specific.
Other nuns
All nuns started out as cloistered, that is the very definition of a nun, as opposed to a Sister. A Sister works out in the world, classically, teaching, nursing, etc. Nuns, such as Benedictines, Cistercians, Carthusians, were all cloistered, although many, not all, modern Benedictine nuns work out in the world like Sisters. (Cloistered is the term for an "enclosed Order". Classically, Carmelites, Visitation Sisters, Franciscans, Dominicans, and many others were cloistered as well, but they are not nuns.