Medical scientists conduct research with the aim of improving human health. They study the various diseases that afflict human beings, their causes, and how they can be prevented and treated. Medical research adds to the existing base of scientific knowledge on health and medicine through experimentation. By studying human diseases and their underlying causes, scientists are able to develop newer drugs or improve existing treatment procedures. New breakthroughs in the field of medicine that has the potential to save thousands of lives each year is the result of extensive medical research. The main purpose of medical research is to search for newer methods of improving healthcare available to human beings which culminates in the development of better medicines and treatment procedures. These scientists also work to investigate methods of disease prevention through drugs and vaccination. Medical scientists may conduct research in laboratories, or work directly with patients in trial procedures to analyze how they respond to certain treatments. They basically work in research institutions, clinics, hospitals and other healthcare facilities. The findings of their research are published in scientific papers in order to disseminate their results to others. Browse this section to explore biographies and timelines about the life and works of various famous medical scientists from all over the world.