Even with the calculation speeds te be expected with quantum computers I think it will impossible to handle all the data needed to be able to project images of the past. Everything is connected. To compartmentalize space and time to project the events you want to see seems impossible to me. 10 to the power 80 atooms in the universe! Besides, Katie taking peeks into the past of Lily, how would she know the time-space coordinates of these places. So nice as an as if story. Henk321