Emergency Medicine
earth science
Cancer.
Mycologists study fungi.
biology Animal Medicine and Health.
Science is too broad of a topic to tackle as a whole.
Depends on what the state has for regulations of what a Nurse Practitioner can specialize in. If a state allows the pediatric nurse may specialize in cardiology too with the proper training and education.
If you want to obtain a science degree, you should look into colleges that specialize in the field of science and technology. For example, California Tech and MIT are excellent options.
They specialize in science
Veterinarians usually specialize in general medicine, although often times they need to be well educated in animal science and health, dentistry and biology.
For a nurse to specialize in his or her job, the nurse must complete nursing school. You will not have to go to Universities, for just a simple community college will do.
An archaeologist specializes in the field of anthropology, specifically in the study of past human societies through the examination of artifacts, structures, and other physical remains.
Hospital jobs online is a great source when looking for companies that specialize in nurse staffing software. Another good place to look is nurse finders.