I've been pondering a concept that of timetravel that involves going back in time to the body of ur past self. Let me explain: It would work by the timemachine reading ur DNA data and then finding the matching DNA in the timeperiod you want to travel to. Then it would harness this DNA and propel your subconscious into the mind of your past self (or future self). The mind of you in the past would then become passive and the mind of your present self would take control. When you return to your present time, your past self would not remember any of the events that happend when your present self was controlling their body. It would just remain as a memory blank - like the ones you get when you are drunk. This concept would also explain why people HAVE memory blanks with no explanation as we know that if timetravel exists in the future it would also exist in the present.
Binary code credits to: vladart