If you travel to the past from your present, 

then that past becomes your future, 

and your former present becomes your past. 

Therefore it cannot be altered by your new future. 

 if you travel to the past that past becomes your future and your former present becomes the pastwhich can't now be changed by your new future 

• Travelling through time creates a branch

• The present day that you left through the quantum realm becomes the past

• The actual past becomes the present day

• The future is the alternative present day from which you left, so the events are different

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