Return of the Annunaki
Serpentfolk and many older nagas refer to humans, and sometimes by extension, any humanoid race that may have been created or whose origins may have had influence by the ancient Annunaki or their descendants, as an ‘Adamu’. Some lore regarding the Annunaki and the Adamu races traces back to their supposed intervention in the natural evolution of humanoids, and especially the human race, in very early times, much longer than before the aboleths gave rise to the ancient empire of Azlant. None of this lore is backed up by any physical evidence in the common knowledge, but some nagas and other scholars claim to have some purported evidence or clues to finding the answers about the nature of humanoid origins on Golarion. Many argue that the planar nature of reality and the existence of nearby inhabited planets, more likely posits that humans and possibly other humanoids did not evolve on Golarion, but may have instead been transported to Golarion from other worlds or planes, but the earliest folklore claim that the serpent-gods from beyond the stars were the first dabblers in Golarion humanoid genetics (Knowledge [history] DC 30). It is thought by some scholars, especially those in Vudra who have extensively studied the issue, that – had the Serpent Races not intervened directly in genetic experimentation on humanoids – humans would look now as the vanara race do, with nothing to say of the other humanoids which may have been affected.
Half-giants, one of the other variations on the theme of genetic cross-breeding, are more accurately humanoids whose ancestors’ blood was infused with the essence of the Nephilim, and are among those races which are part of the Adamu genetic experiments program which occurred on the planet many hundreds of thousands of years ago, and which stirred the curiosity and urgent involvement by the aboleths very early on in the development of the humanoid races on Golarion. It is, by some measure, the direct result of the Annunaki involvement in genetic experimentation and selective breeding methods which brought about the semi-reactionary activities by the aboleths near Azlant to help raise their people up, in an effort to undermine the authority and security of the early Serpent Empires. Knowing half-giants are not actually giants bred with humans is easier (Knowledge [history] or [local] DC 20, but knowing the deeper origins is as above (DC 30+).
Any psionic race is often seen as possibly having been early experimentation in the bloodlines of humanoids, in an effort to produce a more viable soldier class, to seek out more varied and powerful forms of psionic potential in lesser races (for application to themselves), and may have some relation to the Annunaki bloodlines, either allied with them in blood, or opposing them in aggressive liberation from oppression. Hybrid beings, or those of other humanoid races which bear serpentine features, or other characteristics of the Annunaki bloodlines, are also included in this group, and may compose and incredibly diverse racial base.