system
Given the following post, respond as if you're commenting on Reddit:
human
[Prometheus] How could the Engineers have created humanity while the fossil record of humans and their ancestors is well-documented and shows a clear line of human speciation from other primates?

Basically, when the Engineer sacrifices himself to create humanity, wtf is going on in that sequence? Was it an Earth prior to microbial life? Couldn't have been considering the abundance of liquid water, a thick atmosphere, and enough oxygen for the Engineers to breathe. Was it the Mesozoic? Mammals already existed by then. Was it the cenozoic? *Primates* already existed by then. By the way, would Engineers count as some sort of primate at any rate? Are all Earth primates actually descendants of Engineers? How tf does any of this make sense?
gpt
The engineers seen in the beginning are at a very early stage of Earth's development. Iirc it's hundreds of millions of years ago. They seeded their own genetics into the muck of earth and created a series of evolutionary events that would end in humanity. A near identical species to themselves but with several cultural and biological differences to make it an experiment rather than a cloning practice.