An organism that can survive in harsh conditions is termed a extremophile. Extremophiles are capable of thriving in extreme environments such as high temperatures, extreme acidity, salinity, or pressure. Examples include thermophiles, which thrive in hot springs, and halophiles, which flourish in saline areas. These organisms have unique biochemical adaptations that enable them to withstand conditions that would be lethal to most forms of life. Studying extremophiles can provide valuable insights into biotechnology, astrobiology, and the limits of life on Earth and potentially other planets.