What happened in the opening of Prometheus? There are several explanations online and most of them make sense, but which one is it, really? What I believe is that the Engineer’s sacrifice led to the beginning of life on Earth. We all know life began as microscopic organisms in the water and slowly evolved from there. The Engineers could be extremely old. We clearly see his cells reform in the water into something entirely different from his own DNA. The scene opens with gorgeous landscape shots that are practically all gray, lifeless. Is this what Ridley Scott implied, knowing the Ancient Astronaut theory influenced his vision a lot? We already know they came back and visited Earth many times, so I think they’ve been doing it for long enough to manipulate our ancestors and finally make us…. after them, of course.