Time travel is a theoretical concept in physics and science fiction that involves moving between different points in time. The idea of time travel has been explored in various scientific theories, such as Einstein's theory of relativity and wormholes, as well as in popular culture through movies, books, and television shows. The possibility of time travel raises questions about causality, paradoxes, and the nature of time itself. Scientists continue to debate the practicality and ethics of time travel, as well as the potential technological advancements that would be required to make it a reality.