I'm glad to hear an actual scientist in this field also think what I've thought for a long time, which is that time is a human invention. I can't really explain it, but I've always felt like the universe doesn't really have a concept of time, that everything is just right now, hence why I don't believe in time travel either. Time is just a way for us to say 'something was' or 'will be', but in reality what was isn't anymore, it's not that it's in the past, but that the object was changed into what it now is.