I do not know if the Bible says there are no parallel dimensions, etc. I believe in not getting lost in thinking about it. I do not personally believe in some of these things or all of these things. We are talking about different things.
But there are different dimensions. For example, one dimension is length. Another dimension is width. A third dimension is height. So, we live in those three dimensions or 3-D. Some believe time is the 4th dimension and it might be. Some believe there may be around 11 dimensions in total. I don't know how many there are. But we can see and count three dimensions. But there may be higher dimensions. There may be lower dimensions we do not know about.
If there is one God, then that one God could still be God of an infinite amount of universes or timelines or whatever else. I don't believe that there is other versions of me in another timeline or universe. But I also believe anything is possible. I have strong beliefs regarding why I would not want to believe in parallel timelines.
But I don't think the Bible says God can't do it. Instead, the Bible doesn't talk specifically about everything. It seems that the Bible is simply focused on humans on earth. That doesn't mean there are no aliens on other planets or other places. I don't know what I don't know. So, I'm not going to say that I know what I do not know because I don't know what I don't know. It's that simple. Therefore, I should focus on what I do know and not get too lost on the theories of what I don't know.
RE: How much do we know about the CE COMMON ERA, the AD ANNO DOMINI ERA or AFTER CHRIST ERA?