Xenomorphs Predating the Black Goo Would Explain the Engineers Mural in Prometheus If the Xenomorph XX121 species does, in ...

Prometheus ends with the surving Engineer on ... that this is not the first time the Engineers have encountered it. The mural suggests that the Engineers had either already encountered the ...

but also more directly through the mural shown in the chamber with the stone head effigy and black substance containers inside the Engineers' ship. The image clearly a person (could be Prometheus ...