Space Jockey, and their end. . .

I see our Xeno brothers as a "cleansing of higher organics." I have devoured all that is Alien (comics, books, movies, scripts, and anything and everything Alien in origin) and have found the Space Jockeys to be one of the greatest mysteries of all. No, I think if the SJ are terraformers, that they do in fact push both atmospherics (environment engineering) and organics to their logical end. It's what forces they possess that scares me, like a swimmer in a vast ocean helpless... alone... "in space no one can hear you scream."

I don't know, maybe that's the reason the planet in the original 'Alien' was so barren in the first place........