Extremeophiles are organisms that thrive in extreme environments where most life cannot survive. These environments include high temperatures, extreme acidity, high salinity, and intense pressure. Examples of extremeophiles include thermophiles, which live in hot springs, and halophiles, which flourish in salty lakes. These unique organisms are of great interest to scientists because they can provide insights into the limits of life on Earth and the potential for life on other planets. Studying extremeophiles helps researchers understand biochemical processes that could be useful in biotechnology and medicine.