Astrobiologists are scientists who study the possibility of life beyond Earth. They explore extreme environments on our planet, such as deep-sea vents and polar ice caps, to understand how life can survive in harsh conditions. This research helps them develop theories about what extraterrestrial life might look like and where it could exist in the universe. These scientists often collaborate with astronomers and planetary scientists to analyze data from space missions. They investigate celestial bodies like Mars and the moons of Jupiter and Saturn for signs of life or conditions that could support it. Their work is crucial for future explorations and understanding life's potential in the cosmos.