Around this theme, the screenwriter can develop two branches, Earth 1 and Earth 2, at the same time. Of course, don't make it so obvious. In the middle, the story of another earth can be interspersed without us noticing, and it will converge at the end.
Such a good subject matter has been turned into a bloody plot, and all kinds of news that have been paved for so long are just for the last appearance of the heroine.
View more about Another Earth reviews