when time travel is a fact it will be from that point that it will be possible...why you ask????....like all forms of travel you will need a start point and end point....therefore it wont be as simple as pressing a button and landing in 10000 bc.....you will only be able to travel forwards or backwards in time from and to a transmitter/receiver type machine.....you wont be able to travel to a place in time that doesnt have such a machine.....so time travel wont let you travel until that machine is invented.
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