The truth is that we were all "space travelers" floating through "inner space" for nine months, and then expelled into an environment where absolutely Nothing was recognizable! The arrogance on display throughout history by some of us "humans" is truly astonishing! The answer is that "origin" questions are unknowable and those "guess and by golly" speculations border on silliness! What we call God and when we state that we ourselves are created in the "Image of God, all we really know as truth is that , looks aside, Only "God" can "exnihilate", that is toe create something from nothing, so where we share in that image, we have a similar ability to create, but can only create something from or out of something else!