The term for organisms that can live in extreme conditions is extremophiles. These organisms, including certain bacteria and archaea, thrive in environments that would be hostile or lethal to most life forms, such as extreme temperatures, salinity, acidity, or pressure. Extremophiles play an essential role in understanding the limits of life on Earth, their unique adaptations provide valuable insights into biochemistry and evolutionary processes. Research on extremophiles has implications for biology, biotechnology, and the search for extraterrestrial life, as they expand our understanding of the conditions under which life can exist.