We read that Adam was created from the dust of the earth. Does this mean that he was independently formed by God from the earth or that God evolved humanoids from dust until a suitable physical state was reached and then one such adult male was taken apart and designated man and spiritually completed to be truly the image of God and made distinct from his humanoid brothers in this spiritual way and even, perhaps, physical way. At this point Adam was perhaps removed from the cycle of life and death in the “garden of Eden” until he sinned.
This is just speculation. The important thing is the mankind is united to the rest of creation yet unique in a special way that is to do with man’s relation to God and governance of creation and initially this man is not bound to death. From this first unique man then comes the rest of modern humanity. Other humanoids such as Neanderthals may well been another type of humans but not been humans in the special way that Adam was in the image of God. Perhaps, though, they are a variety of Adam’s descendants?
Also, Christianity is a faith that is grounded in history. The stories of the Old Testament are also grounded in history, while yet containing levels of typology and spiritual meaning. Thus while it is tempting to just read the Genesis stories as metaphor we must be careful not to lose the grounding in history of the Old Testament. Can we arbitrarily determine when legend turns into history? How do we determine this objectively? I raise this issue so that there is a need to somehow reconcile the biblical testimony with the physical evidence. If God truly inspired the Old Testament and spoke to Moses revealing the Law, including Genesis, and God is all knowing and the Creator, then we should we not believe that the stories are true at more than the level of a parable/metaphor. Also, not only with the Scriptures as Orthodox we need to be faithful to the interpretations of the Fathers such as St Basil the Great and St John Chrysostom, who both spoke on these matters. Can we be truly Orthodox if we approach the Scriptures in a different manner than the Fathers? Yet with advances in scientific knowledge, there are things which we know now that do not easily, if at all, permit a traditional interpretation.
Well, these are some ideas to start the ball rolling. It is not merely a matter of Creationism vs Evolutionism. We are created, yes, created things change and develop, with God’s help. Can be reconcile biblical and physical evidence without denying either. I am sure that there are many better developed thoughts our there.