STEM cell research is a field of medical science that focuses on the study of cells and their potential to treat and cure diseases. It involves the use of STEM cells, which are undifferentiated cells that can be used to create specialized cells with specific functions. This type of research has been used to develop treatments for a variety of diseases, including cancer, diabetes, and Parkinson's disease. It has also been used to create new organs and tissues, as well as to repair damaged ones.