Extremophiles are remarkable organisms that thrive in extreme environments where most life forms cannot survive. These environments include extreme temperatures, acidity, salinity, and pressure. Examples of extremophiles include thermophiles, which flourish in hot springs, and halophiles, which thrive in highly saline conditions. These unique organisms have adapted to their harsh surroundings through specialized biochemical processes. Studying extremophiles not only helps scientists understand the limits of life on Earth but also has implications for the search for life on other planets, such as Mars and Europa, where extreme conditions may exist.