I try to stay away from speculation. All theories require speculation. I know that what God is revealing is all that we need, and I know that speculation cannot produce anything but delusion. So, I know that God created the Heavens and the Earth and the Seas and everything in them in six days, creating Adam from the dust on the sixth day. To know more than God says is impossible. God speaks through Scripture and Creation, but we are not to add to His words lest He show us to be liars. That means that assumptions and other kinds of made-up stuff are useless. It also calls for a close walk with God in which we learn to hear His Voice and have discernment between our own minds and the mind of Christ.