A time traveler is a fictional character or concept that can move between different points in time, either to the past or the future. This idea is often explored in science fiction literature, movies, and television shows. Time travelers may use various methods, such as a time machine, to navigate through time and experience different historical events or future scenarios. The concept of time travel raises interesting questions about causality and the nature of time itself. It has been popularized by works like H.G. Wells's "The Time Machine" and the Back to the Future film series. These stories often explore the consequences of altering past events or the challenges of adapting to future societies.