If I can travel back in time, can I change history?
If we can travel back in time, we have a chance to change history. But changing history is often a complicated and risky process because we can't predict or control what will happen in the future. Therefore, changing history usually required great effort, determination, and courage, as well as consideration of possible consequences and impacts. In some cases, traveling back in time could change history. For example, if we can accurately predict and prevent an event from happening, we may be able to change the course of history and avoid some disasters and mistakes. But such changes are usually short-lived because we can't control or influence the past for long. Traveling back in time is a very complicated and challenging problem. We can't be sure if we can change history or predict and control the future.