Species are not fixed. The baramin is fixed.Robert Carter, The Amazing Braided Baramin Concept Is Intrinsic To Creation, (about 4:30 in the video)
In Genesis we read that God created (bara) creatures which came forth after their own kind (min). From here we get the term baramin, a created kind. A baramin may contain a single species, such as mankind being the only species within its own baramin or a baramin may contain many different species, coming and going, but staying within their own kind as they change. That means what is fundamental is the baramin, not the species.
Peer Terborg notes that pluripotent baranomes provide the source for the diversity of life we see today. Life did not start from something simple and evolve into something complex. It started wondrously complicated, designed for change.
That means that Adam was not a primitive human being who evolved into us over time. He was more advanced biologically than we are.
This view of life and change based on DNA does not require deep time to reach the sort of world we experience today. Indeed deep time, even one hundred million years of deep time, would destroy the fossil record through erosion many times over or destroy life itself through genetic entropy. Deep time, along with evolution, are modern myths unworthy of our attention.
I used to have a science fiction view of reality. I thought our species would continue for hundreds of millions, if not billions, of years. We would visit other planets inhabited with intelligent life and settle uninhabited worlds. I did not realize that mutations would stop all of that no matter how many spaceships we sent to other stars.
Today, I don’t think there is life of any sort on those distant planets. The reason is because there is no known mechanism for life to pop into existence outside of God’s deliberate creation.
That realization put a brake on my former fantasies and having given up on the schemes of Man my prayers took root in desperation. We live after the Fall revealed in Genesis and before the Kingdom prophesied in Revelation. It is humbling to realize that there is no way out of this but the coming of the Lord. There never has been. Maranatha!
Weekly Bible Reading: Jeremiah (Audio), Lamentations (Audio)
3 Cheshvan, 5782, Noach: Parashat Genesis 6:9-11:32; Haftarat Isaiah 54:1-55:5
David Pawson, Jeremiah, Part 40, Lamentations, Part 41, Unlocking the Bible
Bible Project, Jeremiah and Lamentations