Nubian wedding with some international modern touches, near Aswan, Egypt
The type, functions, and characteristics of marriage vary from culture to culture, and can change over time.
Health science is the discipline of applied science which deals with human and animal health. There are two parts to health science: the study, research, and knowledge of health and the application of that knowledge to improve health, cure diseases, and understanding how humans and animals function. Research builds primarily on the pure sciences of biology, chemistry, and physics as well as social sciences (for example medical sociology).