It's a documentary styled sci-fi drama, so you have to take it with a grain of salt. It incorporates physics beyond our normal understanding, like other dimensions, star-gates, and other phenomenon that we've never experience, so it definitely does not conform to normal rules of space-time & matter as we know it.
With that said, it is a twisted, fantastic, sci-fi thriller that keeps you guessing and adds some emotionally charged scenes that really make the movie shine.
It can be a bit slow at times because of the documentary style filming, but super interesting as I had not watched a trailer before, so I wasn't sure at first if I was watching fiction or a documentary.
If you stick it out to the end, it's a real treat!