Time travelers are individuals who, in theory, can move between different points in time, much like we move through space. This concept is often explored in science fiction, where characters use devices like a time machine to visit the past or future. The idea raises questions about the nature of time and the possibility of altering historical events. In popular culture, time travelers are featured in various books, movies, and TV shows, such as Doctor Who and Back to the Future. These stories often highlight the adventures and challenges faced by time travelers, including the potential consequences of their actions on the timeline.