Personally I have experienced a lot with ghost activity. If who ever it is wants your attention fear not they will be back with more calamity. You will just have to wait and see. Have you had a relative die recently? Perhaps one you were close too? There are many reasons activity can start and...
There is nothing in GR that prevents time travel, although there might be once a full theory of quantum gravity is developed. Nobody knows yet.
I just want to tell an experience and then you tell me if you call it time travel...
I'll be brief: A friend needed help to find a guy who robbed...