Hi guys, I'm new to this site but I have two time-travel theories I'm wondering if they can be true. 1. Time travel is impossible. I think time travel is impossible because there would not be enough space in the multiverse to hold it, I think this because time travelling back in time would result in creating infinite loops of creating a new 'universe'. This is because time travel to any certain time past/future would be time travelling to a time where you must have/will exist meaning you in the future/past would have to have done the same to get to where you are now. Thus meaning those events would have to already happen and will happen at the same time. Please reply if you understand what I am trying to say. 2.If Time travel was possible, going to the past and changing things would not affect the future. Why I think this is because what already happened in the past can not be changed, it would be impossible for anyone to change anything in the past. For example, if you went back to change your grandparent's death, you would not be able to as what you try to do to change the past would lead to what originally happen and you always would have been the cause for their death.