hmmm

the way i see it, is if we were able to go backwards and forwards in time, than its almost like creating another universe, or creating a parallel time line to that of the universe.

what i mean is this. if i born in the year 2000, and then in the year 2020 i went forward in time 30 years to the year 2050, i would still only be 20 years old. but someone born on thje same day as me but didnt travel in time, would be 50 years old. so, just because we could travel forwards or backwards in time, it doesnt mean we would have to go back to when we left our original time line.. i hope that makes sense

another thing, matter cannot be created or destroyed.. the combined weight of the universe has been the same since the dawn of time. so, if i was to go back in time, there would be one time line where a whole person just vanished, and another time line where i didnt vanish.. what would be the consequence? what would replace me in the original time line? would it be dark-matter or anti-matter or what? lol