What If: Time Travel Is Real
Everyone wants time travel to be real, and it sort of is. We now know spacetime is its own time and gravity is what dictates time on various planets. We simply adjust to this and therefore all time is based on gravity levels. This is why we could likely jump several years in Earth time within a few hours. It’s really all about speed and how fast we’re moving. However, while we could jump forward we cannot go backward. But what if we could? If this could take place, one of two things would likely happen.
First, branched realities or multiverses would be formed (if they are not already). Anything we change will start its own new reality or universe. The original reality would remain unchanged. On the other end, we’d have one universe but any changes would not be noticed. The rest of the world will never know anything else occurred, and it is likely the longer you remain in this changed reality, the less you’ll remember about the former. Thus, if time travel was real then we’d never really know it was, no matter which version of it we find ourselves in.