If you read carefully, Genesis said that the Earth was formless and void, and what I found that this meant was that before all things existed was a primordial chaos. To the Babylonians, this was symbolized by the monster Tiamat. In the Old Testament, the beast of that chaos was named Rahab. In the old myths, the progenitor god slays the beast of the chaos and from the body is formed the world that is. We can see that myths themselves change, but there seems to be a deep memory that we share of the old things of the world.