I just wanted to point this out in its own thread in the hopes that people will see it.
Sophia's people are not aliens, at least not truly. They may be from the future, a human colony on another planet, or an alternate universe. They may be human/alien hybrids of some sort. They may be different enough to technically be a separate species, but they are not extraterrestrials who evolved completely on their own on a planet discretely separate from our own.
Why not? Because, their DNA is only different by one percent. Yes, that is in fact quite significant genetically speaking, but that's far too close for coincidence. If they had evolved on another planet, without all of the key environmental factors being exactly the same (gravity, atmospheric composition, predators, food, etc) then they would have evolved differently to adapt to that different environment, and that's if they were seeded from a common prehistoric ancestor. (with of course more time on the alien world and/or less technology meaning a greater difference in evolution) If each planet started from scratch, then we might not even be talking about the same building blocks (proteins, amino acids, etc) being employed, at least not in the same ways.
In other words, a frog would be more closely related to a human than an alien would be. Any significant degree of genetic similarity or compatibility would be a coincidence of impossible likelihood. Sorry Superman.