Let me square the circle: It turns out the Fallen Angels were aliens. Nimrod was not one of the Nephilim, but the leader of the Fallen Angels. He is one and the same as the entity known to the Babylonians and Sumerians as Marduk. In fact, the two names are simply different ways of reading of the very same cuneiform.

Much of the research in this area really involves just straightening out what is already known and putting the pieces back together. It seems counter-intuitive, but you must gather data from many different sources. In hindsight, you can see that the story was splintered over time and each source was corrupted in various ways.

That may sound high-falutin', but it's no more mysterious than talking to a dozen witnesses to a car accident six months in the past. Memory fades and is edited, everyone has their own perspective, and impressions may not have been properly interpreted in the first place.

With a lot of work it can be accomplished, but what I have found is that everyone appears to have fallen off the track before that lot of work was completed. Usually, it seems, they found what they wanted to hear and stuck with it.