If I could travel faster than the speed of light and travel into the past, will I be able to change it or my momentum will make it impossible for me to physically change the past and will keep me invisible to my past instance so that when my past instance arrives back into the time from where in the future I travelled from I would have no more of me there as I had already travelled and my past instance will replace my future instance in the present and carry on with my life. Only problem is that will my previous future instance still be travelling therefore there will be more than one of me in existence.
Yeah that's me thinking!
a lot nowadays
