For as long as human beings have looked up at the night sky, we have asked a simple but profound question: Are we alone? The search for alien life is not just a scientific investigation—it is a philosophical journey, a technological challenge, and a story that stretches from ancient myths to cutting-edge space missions. Today, with powerful telescopes, robotic explorers, and advanced biology labs, humanity is closer than ever to answering one of the greatest questions in history. This is the story of how we search for life beyond Earth—where we look, how we look, and what we might find.