Space/Science — HabitableZone

Space/Science » in reply to I don't understand the mechanics....

re: I don't understand the mechanics....

No, no - ghosts are rogue programs in the Matrix. :^)

Actually, is there someone who could explain perhaps what this barrier is that won't allow anyone to change the past? Is it "real", or is it like Stephen Hawking's wishful thinking that someone or something will keep time travelers from affecting the past?

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