At present scientists, researchers, and their support staff from 30 different countries live on about 70 scientific bases with a population of around 4000 in summer and around 1000 in winter. The main purpose for people living in antarctica is to undertake scientific research in atmospheric studies, glacilology, medicine, biology, environment, human impact, etc. Other people like lumbers, electricians, mechanics, and carpenters also live at these stations to support the scientific research work and keep these research stations running.