Time travel involves moving between different points in time. This theoretical concept has been explored in various forms of literature and media for centuries, but it wasn't until the early 20th century that it became a topic of scientific interest and study, thanks to Albert Einstein's theory of relativity.
While time travel is a popular topic in science fiction, there is ongoing controversy surrounding the reconciliation of Einstein's theory of relativity with quantum mechanics. Despite this, the theory of relativity has significant implications for our understanding of the universe and has led to the development of technologies such as GPS and the study of black holes. The concept of time travel has a long and fascinating history, with early myths and legends featuring characters who could move through time in various ways.