This is the Halo universe, forerunners proved they could meddle with DNA even devolve humanity, laying the seeds for dormant forerunner DNA in Chief would not be beyond the life workers. Seriously Forthencho, look at the cutscene from the solo Legendary ending again in Halo 4. I refer not to pigment of his skin more to the quote pronounced forerunner facial features, look at his nose and sunken eyes. See below, please ignore other users that don't want the Halo 4 ending spoiled, this is a proper spoiler. [spoiler]http://youtu.be/LJfhb7oj_es [/spoiler]