Actually, certain solutions for Einstein's equations of general relativity do allow for the possibility of closed timelike curves which could allow what was shown in the movie to occur. Now granted, we're talking some bleeding edge physics that so far only works on paper and may very well be proven wrong someday, but is it a possibility based on our present understanding of the laws of physics? Yes. Yes it is.Phoenixmgs said:I had the exact same problem with Intersteller. The human race couldn't actually get to a new planet without aid of future humans so how do those future humans ever even exist if humans are incapable of interstellar travel? Again, the future caused its own existence.