Genesis 8:1: But God remembered Noah and all the wild animals and all the domestic animals that were with him in the ark. And God made a wind blow over the earth, and the waters subsided; 2 the fountains of the deep and the windows of the heavens were closed, the rain from the heavens was restrained, 3 and the waters gradually receded from the earth.

The Flood narrative of Genesis 7-9 has played a prominent role in science and religion debates for over three hundred years and gave rise in earlier centuries to geological theories such as old earth catastrophism. While literary studies have uncovered the chiastic structure of the Flood story (see Gordon Wenham, “The Coherence of the Flood Narrative” Vetus Testamentum 28 (1978):336-48) and with it the theological pivot point of the entire narrative (Gen. 8:1 – “And God remembered Noah…), much of the popular attention remains on the questions regarding details (Is there THAT much water in the world to cover ALL the mountains to a depth of 15 cubits? Could you really fit two or seven of every animal species in an ark that size?)

Looking at a smaller matter, we find at the beginning and the middle of the narrative indications of an ancient Near Eastern worldview. As the story is told, the flood was not merely the result of excessive rain, but actually the convergence of the waters above the earth with the waters below the earth. It is, as one translation puts it, as if the sluice gates at the deep and of the heavens were thrown open and water poured in from above and below. This is a consistent picture from the Old Testament of a three-tiered universe—a dome above the earth holding back the heavenly waters, a flat earth with water on its surface, and water under an earth which is held up by pillars.

That the story is told using the cosmology of its time should not be unduly unsettling, nor that the story is reinterpreted as new understandings of the universe come into favor. By way of example, consider John Calvin and his understanding of the structure of the universe. Although committed to the principle of sola Scriptura, Calvin recognized that the Bible would have been written in terms its original recipients would have understood.

Calvin inherited the medieval cosmology of his time, a way of viewing the world heavily influenced by Greek thought and one which was about to receive shocks from astronomers such as Copernicus and Galileo. But not just yet. Calvin still subscribed to the common conception of his day in which the four elements—earth, air, fire, and water—comprised the earthly sphere and possessed unique characteristics. The nature of air and fire was to rise, while the nature of earth and water is to sink. Earth, being heavier than water, should sink to the center of the cosmos and water should compose the next layer. Both earth and water are spherical, i.e., naturally form spherically around the cosmic center. Thus the heavier spherical element of earth should be encased entirely within the lighter spherical element of water.

Notice what this does to the flood story. For Calvin, the amazing thing is that the world isn’t constantly under water and subject to flooding. In the cosmology of Calvin’s day, it does not take an act of God to cause a universal flood, but rather an actively present and restraining hand of God to keep the waters back in everyday circumstances and make inundation by water something other than universal.

Obviously, Calvin was wrong. Or perhaps we should say that medieval cosmology was flawed and justifiably gave way to new conceptions of the universe. The answer is not to return to an ancient Near Eastern cosmology, but to reinterpret cautiously within new and better cosmologies and to pay closest attention to the text and the theology of scripture.

The geological and planetary sciences bring their own unique contributions and are of more interest than the latest expedition to discover the ark on Mt. Ararat. Is the flood story a universalization of a catastrophic regional event that burned itself into the psyche of ancient cultures in the Mediterranean basin? Various theories regarding a Black Sea venue for a catastrophic flood event are still in process of being sorted out. It’s intriguing. Or the question where the water on Planet Earth comes from? Was it always here as an emanation of vapors from the earth’s crust in its early formation, or has it accumulated over eons through the steady bombardment of earth by small, icy comets? It’s an intriguing scientific question that is in the midst of determination through testing.

Preaching Suggestions

When preaching on the story of the Flood, it is easy to get lost in the debates over particulars. As mentioned elsewhere, to tackle all the peripheral issues threatens to turn a sermon into a geology lecture. Other settings are better suited to addressing those questions, and those are best addressed open-endedly.

A brief explanation of ancient Near Eastern cosmology can be helpful to contextualize the story. If there are those who are tempted to think that a cosmology embedded in the Bible must be inspired and definitive, one can note that cosmology has changed by the New Testament. The Bible itself isn’t wed to a particular structure of the universe.

What is important is to keep the theology of the text front and center, and in that theology there are at least three non-negotiables from the flood narrative. First, human sin and violence threatens to undo a good creation (the flood is a de-creation event, a return of the waters mentioned in Genesis 1:2). Second, God remembers Noah, and never forgets his promises. Third, the end of the flood is a covenant with the whole earth regarding the stability and endurance of the natural order.

A common argument leveled against the theory of evolution is that scientists have not been able to produce the expected transitional fossils that show the change of one species into another. If evolution were true, wouldn’t there be instances of clear intermediary species, like, for example, a species that was half whale and half hippo to show the transition between those two? In this BioLogos podcast, Kelsey Luoma addresses this misconception about what a transitional fossil actually is. Rather than a mix between two related species, transitional fossils point back to the common ancestors that modern species share. The fact is that the number of transitional species is massive and it grows with each passing year. Given the rarity with which organisms are actually fossilized, the amazing thing is actually the completeness of the fossil record, not its incompleteness. The transitional species story strongly supports, and certainly does not disprove, evolutionary theory. ¹

1. To hear the full audio clips which have been referenced go to:

• Rational Response Debate with Kirk Cameron (from Way of the Masters)
• Behind the Scenes with Dr. Neil Shubin (from Cincinnati Museum Center)
• Mark Norell Publishes New Archaeopteryx Findings (from American Museum of Natural Sciences)
• Texas A&M Professor Discusses Findings of Autralopithecus Sediba and its Relationship to Humans (from Texas A&M University)
• Intro/outro music composed by Martin Minor (Minor2Go).

An audio only version of the podcast can be downloaded here.

Transitional Fossils

Some time ago, the Discovery Institute’s Casey Luskin commented on the human origins exhibit at the Smithsonian Institution, suggesting that palaeoanthropologists use evolutionary theory to describe the progression of the human lineage even when they don’t have transitional fossils with which to work. He writes:

What's ironic, however, is that if you ask the question How Do We Know Humans Evolved? the answer you’re given is, “Fossils like the ones shown in our Human Fossils Gallery provide evidence that modern humans evolved from earlier humans.” So whether you find fossils or you don’t, that’s evidence for evolution.

Indeed, it has become an article of faith for those espousing both the young earth creation (hereafter YEC) model and many who hold to the intelligent design model that transitional fossils do not exist and therefore evolution has not taken place. Support for this position usually entails attacking the weak areas of the fossil record, where burial processes have left us little with which to work, or the creation of straw men arguments in which transitional fossils are defined in such a way that none could ever be found. Often this centers on the concept of “missing link,” a term that is habitually used in the popular press and young earth creation and intelligent design literature when referring to fossil remains but which has little to no meaning for biologists or palaeontologists. As Ahlberg and Clack (Ahlberg and Clack 2006) write:

But the concept has become freighted with unfounded notions of evolutionary ‘progress’ and with a mistaken emphasis on the single intermediate fossil as the key to understanding evolutionary transitions. Much of the importance of transitional fossils actually lies in how they resemble and differ from their nearest neighbours in the phylogenetic tree, and in the picture of change that emerges from this pattern.

Contrary to common misconceptions, the fossil record does not record one single lineage for any family of organisms but rather a series of branches, with many related species coexisting synchronously. Darwin hypothesized that the evolutionary record reflected this bushiness and drew such a diagram in his journal. At the time, though, he had little in the way of fossil evidence to back up this position. Much has changed since his day.

An analogy for understanding this “bushiness” was best described by Prothero and Buell (Prothero and Buell 2007). They suggest that the reader consider his or her own genealogy. You and your siblings are the direct descendents of your parents and, while you are similar to them, each of you has different characteristics not shared with them as well as characteristics that you do share. Your parents have siblings as well (your aunts and uncles), and your grandparents are their last common ancestors. These siblings have their own children (your cousins), who have different and similar traits relative to their parents. They are broadly recognizable as being related to you (“oh, I see you have Aunt Edna’s nose”) but three or four generations out, they will become less and less so. These are the “nearest neighbours” that Ahlberg and Clack describe. In this analogy, each of these cousins represents a transitional form from what was (your grandparents) to what will be down the road.

For example, no one would confuse a frog with a salamander but if you trace the fossil record of each back in time, eventually you encounter a fossil, Gerobatrachus hottoni which was recently discovered (Anderson et al. 2008) that is best described as a “frogamander,” having the basal characteristics of both frogs and salamanders. Had we seen such an animal at the time, it is likely we would not have found it remarkable because it would have resembled the species around it. One lineage eventually diverged into frogs, salamanders and other amphibians. Most (just like Darwin proposed in his tree diagram with the little hatch marks at the tip of many branches) went extinct.

Taxonomy and the Beginnings of Human Origins

All life is classified based on a system devised by Carolus Linneaus in 1735 in his remarkable work Systema Naturae. This system gives all recognized species an individual place based on a system of hierarchy. The study of classification is known as taxonomy. A taxonomic ranking for humans would be this:

When a fossil is excavated, the first thing that the palaeontologist does is make a taxonomic assessment of where it fits in a sequence of known fossils. Traits that are shared with other like species or genera are referred to as primitive traits. Examples of this in humans are five fingers and the presence of three arm bones. We share this with all mammals. Traits that are new or are not shared with other like species are referred to as derived traits. Examples of this in humans are the skeletal changes in the pelvis and the foot to allow for walking upright. We do not share these with any other primates.

Transitional fossils in the human fossil record are distinguished at both the genus and species level. This group includes the extinct genera Ardipithecus and Australopithecus and the current genus Homo. All species except Homo sapiens are extinct. Much of the recent study of early humans focuses on the transition from Ardipithecus (‘Ardi’) to Australopithecus (‘Lucy’ and similar fossils) and from Australopithecus to Homo, the genus that led eventually to us. While each of the australopithecine species identified in the fossil record has derived characteristics that separate them from their ancestors and from each other, only one led to the genus Homo.

In future posts, I will describe the evidence for human evolution and why this evidence is compelling. It suggests that we have had a long, varied history filled with great leaps of change, crushing defeat, and eventual expansion into all areas of the globe.

Notes

Ahlberg, P. & J. Clack (2006) A firm step from water to land. Nature, 440.

Anderson, J. S., R. R. Reisz, D. Scott, N. B. Frobisch & S. S. Sumida (2008) A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders. Nature, 453, 515-518.

Prothero, D. & C. Buell. 2007. Evolution: What the fossils say and why it matters. Columbia Univ Pr.

The story in Genesis is a story (full of the deepest suggestion) about a magic apple of knowledge; but in the developed doctrine [of the Fall] the inherent magic apple has quite dropped out of sight, and the story is simply one of disobedience. I have the deepest respect even for Pagan myths, still more for myths in Holy Scripture. I therefore do not doubt that the version which emphasises the magic apple, and brings together the trees of life and knowledge, contains a deeper and subtler truth than the version which makes the apple simply and solely a pledge of obedience. But I assume that the Holy Spirit would not have allowed the latter to grow up in the Church and win the assent of great doctors unless it also was true and useful so far as it went. It is this version which I am going to discuss, because, though I suspect the primitive version to be far more profound, I know that I, at any rate, cannot penetrate its profundities.¹

Whatever its theological profundities, though, Lewis is clear that Genesis 2-3 is probably not a straightforward narrative of historical events. “What exactly happened when Man fell, we do not know,” he later writes. “We have no idea in what particular act, or series of acts, the self-contradictory, impossible wish [to be our own masters] found expression. For all I can see, it might have concerned the literal eating of a fruit, but the question is of no consequence.”²

What, then, is of consequence for Lewis, we might ask? The real story of the Fall, says Lewis, is not the surface narrative about “the magic apple,” but rather what he refers to as “the developed doctrine” of the Fall, namely the doctrine of humankind’s depraved condition:

According to [the doctrine of the Fall], man is now a horror to God and to himself and a creature ill-adapted to the universe not because God made him so but because he has made himself so by the abuse of his free will. To my mind this is the sole function of the doctrine.³

The “sole function of the doctrine” for Lewis is to name the human condition for what it is, namely, shot through with corruption. Or, as Lewis put it in A Preface to “Paradise Lost,” “The Fall is simply and solely Disobedience—doing what you have been told not to do: and it results from Pride—from being too big for your boots, forgetting your place, thinking that you are God.” You might call this the “Mere Depravity” view of the Fall.

Throughout The Problem of Pain Lewis displays a remarkable degree of comfort with evolutionary theory, not least evolutionary accounts of human origins. A corollary of Lewis’s acceptance of evolutionary theory, of course, is that death pre-existed humanity. Lewis grasps this nettle in chapter IX of the book when he writes,

The origin of animal suffering could be traced, by earlier generations, to the Fall of man—the whole world was infected by the uncreated rebellion of Adam. This is now impossible, for we have good reason to believe that animals existed long before men. Carnivorousness, with all that it entails, is older than humanity.⁵

Here is not the place to go into Lewis’s postulation that Satan was responsible for animal predation. We need only note that he makes this suggestion precisely in order to show how a broadly Darwinian picture of natural history may be compatible with a broadly Christian view of the world. For some, severing the link between the Fall of man and death’s entry into the world, is anathema. But given Lewis’ mere depravity view of the Fall, this evolutionary understanding of natural history creates no real problem for Christian faith.

Moreover, for Lewis the evolutionary picture of the ascent of humankind presents no real objection to the Christian doctrine of the Fall, either:

Many people think that this proposition [that we are fallen creatures] has been proved false by modern science. “We now know,” it is said, “that so far from having fallen out of a primeval state of virtue and happiness, men have slowly risen from brutality and savagery.” There seems to me to be a complete confusion here…. If by saying that man rose from brutality you mean simply that man is physically descended from animals, I have no objection. But it does not follow that the further back you go the more brutal–in the sense of wicked or wretched–you will find man to be.⁶

Lewis goes on to note that the categories of virtue and vice simply do not apply to the animal kingdom–and therefore not to our pre-human ancestors either–because animals as such are not moral agents. Moreover, Prehistoric man is not to be presumed to be altogether reprobate simply on account of using only rudimentary tools, hunting and gathering, and the like. Primitivity ought not to be confused with sinfulness he argues. Thus, for Lewis, the discoveries of modern paleontology and archaeology can tell us nothing about when or whether our ancestors fell from a state of innocence, and so we are free to accept, as Lewis seems to have, man’s physical descent from animals without giving up the Christian doctrine of the Fall.

While Lewis may not have publically argued for the historicity of Adam and Eve, his private opinions might have been another matter. In his recent essay “Darwin in the Dock,” John G. West has argued that, regardless of what he said in print, Lewis privately “embraced the literal existence of Adam and Eve.”⁷ West chiefly bases his argument for Lewis’s private belief in a literal Adam and Eve on an anecdote involving one of Lewis’ Oxford colleagues, Helen Gardner, recounted in A.N. Wilson’s C.S. Lewis: A Biography.⁸ Upon being asked at a dinner party whom he would most like to meet after death, Lewis replied, “Oh, I have no difficulty in deciding…. I want to meet Adam.” Gardner, it is reported, replied by saying that “if there really were, historically, someone whom we could name as ‘the first man’, he would be a Neanderthal ape-like figure, whose conversation she could not conceive of finding interesting.”⁹ Lewis, we are told, gruffly responded, “I see we have a Darwinian in our midst” and never invited Gardner to dinner again.¹⁰

West takes this tense little interaction between Lewis and Gardner to indicate that Lewis’ belief in a literal historical Adam and Eve. However, it should be noted that such a conclusion seems somewhat overhasty in light of what Lewis says in The Problem of Pain, where he articulates a view rather similar to what Gardner said that evening:

I do not doubt that if the Paradisal man could now appear among us, we should regard him as an utter savage, a creature to be exploited or, at best, patronised. Only one or two, and those the holiest among us, would glance a second time at the naked, shaggy-bearded, slow spoken creature: but they, after a few minutes, would fall at his feet.¹¹

Given that Lewis actually believed what he wrote here, the difference between Lewis and Gardner seems not to have been either the question of “whether man is physically descended from animals” (which, as we have seen, Lewis was willing to grant) or the question of whether Paradisal man would be a “naked, shaggy-bearded, slow spoken creature,” a “Neanderthal ape-like figure.” Rather they differed over whether “Paradisal man,” as Lewis puts it, would have been someone, however primitive, to be revered, or whether, as Gardner seemed to believe, a mere brute. Taking Lewis’ written statements at face-value, it would appear that his irritation with Gardner owed less to her acceptance of evolution than it did to her dismissive presumption that our forebears were but dull savages.

Finally, it should be noted that Lewis was not even committed to the most basic element of a belief in a literal Adam and Eve, namely, that it was precisely two humans who fell and from whence our species came. He writes, “We do not know how many of these creatures God made, nor how long they continued in the Paradisal state. But sooner or later they fell.”¹² Lewis’s mere depravity view of the Fall and his belief in the mythical character of the Eden story gave him some latitude on the question of whether the Fall consisted of a historic first human pair going wrong at an easily identifiable moment. For Lewis, it was apparently quite possible that whole tribes of “Paradisal” Prehistoric humans could have gone about their business for generations—hunting, gathering, singing around the campfire, rearing children, painting in caves—before the spiritual and scientifically undetectable catastrophe of “the Fall” occurred. In other words, if Lewis were presented with the recent genomic evidence which suggests that our species arose from an initial population of several thousand rather than only two, it is doubtful that it would have flustered him. It simply makes no difference to Lewis’s argument how or how many humans initially “fell.” All that matters for Lewis is that God made humans (perhaps via evolution, perhaps not) and that we humans have gone quite wrong–so wrong, in fact, that it is beyond our powers to repair ourselves. Mere Christianity, for Lewis, does not logically depend on the historicity of the Adam and Eve story, but on the doctrine of our mere depravity.

In tomorrow's concluding post, we turn to C.S. Lewis' views on the compatibility of evolution and Christian faith.

Notes

1. Lewis, The Problem of Pain, (New York: Simon & Schuster, 1996), 63-64, my italics
2. Ibid.
3. Ibid, my italics
4. Lewis, A Preface to Paradise Lost, (New York: Oxford University Press, 1961), 70-71
5. Lewis, The Problem of Pain, 119
6. Ibid, 64
7. West, “Darwin in the Dock,” in The Magician’s Twin: C.S. Lewis on Science, Scientism, and Society, (Seattle: Discovery Institute Press, 2012), 121. West’s volume takes a markedly different view of Lewis and Lewis’s legacy regarding debates about Christianity and evolution. I intend to write a thorough critical review of West’s book in the near future.
8. Ibid
9. A.N. Wilson, C.S. Lewis: A Biography, (New York: W.W. Norton, 1990), 210
10. Ibid
11. Ibid
12. Ibid.

Introduction

One of the reasons that some of us are hesitant to accept evolutionary creation is that it seems to make God responsible for the suffering and death of innumerable creatures over millions of years—before humans ever existed or sinned against their creator. Since we believe in and worship a God who is loving, benevolent, and all-powerful, it sounds quite implausible that our God would have created a world like that; therefore, any scientific evidence for evolution must be incorrect.

Other people look at the scientific evidence for evolution and find a compelling case that it has taken place during our earth's history. On this basis they may conclude that if evolution is true, then the belief in an all-powerful, perfectly good God must be false!

The trouble with both of these views is that they tend to invoke a completely abstract, philosophical god, not the living God of the Bible—the God who became a human being, experienced unimaginable suffering, and died in a grotesque and humiliating public display. The death of Jesus completely defied the expectations (and common sense) of his followers, as well as the expectations of any “rational” understanding of the way the Creator of the universe should act in the world. On the cross, in the person of Jesus, God took upon himself far more suffering than any creature has ever experienced.

If God himself is willing to die, particularly in such a gruesome way, then perhaps we should at least consider the possibility of God allowing the death of other creatures, too. But would this really be compatible with what we know of God through Scripture? In this essay, we will explore this quandary through a “theology of the cross”, a concept articulated by pastor George Murphy in his book Cosmos in the Light of the Cross.¹

Theology of the cross

Before we jump into the theological problems associated with evolution, let’s take a look at how we understand Christian theology itself. For the reformer Martin Luther, any theology (or science) that tries to reach knowledge of God apart from the cross is bad theology.² Instead, Luther pointed to a theologia crucis, in which the true God is seen first and foremost “through suffering and the cross”. To make his point even clearer, Luther insisted that “the CROSS alone is our theology”.³ It is the lens through which we view everything.

Of course Martin Luther, having lived in the 16th century, was not aware of the vast history of life on our planet (or any other aspect of modern science, for that matter), but George Murphy draws from Luther’s teachings the foundation that all human knowledge begins with the Word made flesh and crucified.⁴ With the cross of Christ as the ultimate framework through which we view reality, we are bound to view the processes of nature quite differently. As Murphy explains it,

A theology of the cross is an explication of belief in a God who becomes a participant in the history of the universe and thereby shares in the suffering, loss, and death that are part of worldly experience.⁵

God does not sit idly by and watch unaffected as his creatures suffer, but neither does he swoop in and make everything completely effortless and easy. Instead he chose another way, the crucifixion of Jesus—certainly not the approach that we would have preferred! The apostle Peter went so far as to try to talk Jesus out of it, but he was met with a stern rebuke (Matthew 16:21-23).

Why is evolution so disconcerting to Christians?

The problem of suffering throughout all of human history is troubling enough for us to reconcile with a loving, personal God. But in addition to that, the discovery of vast numbers of fossils reveals that death has taken place on a far greater scale than we had ever imagined. Both the wide variety of extinct creatures and their sheer numbers is quite staggering, and it raises questions about our Creator:

The picture of a God who is immune from suffering and death but who forces organisms through millions of generations and extinction is disturbing to those who believe in a God of love.⁷

The mass extinction of life on earth was already well established by the early 19th century—decades before Darwin’s research—and extinction can be empirically verified independent of any theory of evolution.⁸ The fact that the earth’s crust is a veritable graveyard of long-lost creatures is deeply troubling, and as late as the 1790’s, distinguished intellectuals such as Thomas Jefferson denied the very possibility of extinction.⁹

But in addition to the reality of species extinction, the theory of evolution by natural selection proposes that new species also arise in an environment containing widespread pain and death. Both the creatures that are now living and those that are gone are tainted by an “acrid smell of death”.¹⁰ It makes us wonder, if our Creator is not the God of the dead, but of the living (Mk. 12:27), where is God’s presence in the evolutionary picture?

In all honesty, creation through evolution is not what we would expect from God, but Scripture is full of examples in which God acts in unexpected ways. After all, God’s choosing to undergo an agonizing death on a cross is not what we would expect from the all-powerful Creator of the universe, either. In both cases, new life comes about through pain, suffering, and death. As George Murphy puts it,

A priori ideas about God have to be overcome, and God's character has to be learned from God's self-revelation.¹¹

God’s fullest self-expression is in Jesus Christ himself, one who is intimately familiar with and personally endured creaturely pain and death. The theology of the cross reveals that God's self-revelation takes place in situations of suffering, loss, and apparent hopelessness, much like situations that occur through natural selection.¹²

The crucifixion is disconcerting too

Not only is creation through evolution an unexpected and unsettling process, but so is the crucifixion of Jesus! Killing someone by hanging them on a cross is an unbearably painful, prolonged, humiliating form of death. It was such a horrific type of public execution that it wasn't until after the Roman Empire stopped the practice of crucifixion—and people no longer witnessed it personally—did the cross become a visual object of devotion.¹³ Our culture is sufficiently removed from crucifixion that we are desensitized to its original significance, but to connect it to our current context, imagine the reaction you would get by wearing jewelry designed to look like an electric chair.¹⁴

Once we are more attuned to the brutality of crucifixion, it seems all the more striking that the cross is the sign of God’s work, what George Murphy calls “the trademark of God”.¹⁵ The suffering and death of Jesus is featured prominently in the Gospels, but the crucifixion-resurrection pattern is strongly resonant within the Old Testament, too. Israel suffered and toiled as slaves in Egypt for centuries before they were rescued in the Exodus, bringing life to a people who were spiritually dead. Centuries later, the nation of Israel would experience death again when the Babylonians destroyed the Davidic monarchy, burned their Temple, killed their people, and sent many into exile.¹⁶ Neither Israel (God’s chosen people) nor Jesus (God’s own son) were spared from death and suffering; rather, suffering seems to have been the way in which God re-forms and renews humanity to fully bear His own image.

Redemption extends to all of creation

Fortunately, God’s story does not end with death. God gives new life after his creatures have been subjected to terrible circumstances. Redemption was promised to Israel itself—Ezekiel’s vision of the valley of dry bones describes how God would renew His chosen people (Ezek 37:1-14). Later, the astonishing resurrection of Jesus made salvation possible not only for Jews, but for all people in Christ (Gal 3:26-29). Ultimately, the New Testament makes it clear that God’s renewal will encompass the entire Creation:

For God was pleased to have all his fullness dwell in him, and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross. (Colossians 1:19-20)

With all wisdom and understanding, he made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, to be put into effect when the times reach their fulfillment—to bring unity to all things in heaven and on earth under Christ. (Ephesians 1:8-10)

Christians are accustomed to thinking of the death of Christ in regard to humans, but our culture rarely acknowledges God plan for the redemption of His entire creation. This is partly attributable to the fact that discussions of creation and origins are often separated from the topic of salvation.¹⁷ In doing so we tend to marginalize Jesus as we argue about Genesis. Rather than fall into this trap, if we view nature through a theology of the cross, we will see Christ as both the alpha and the omega point in discussions of life’s history and life’s future. With this perspective, we are more apt to sense our solidarity with the rest of creation as we wait in eager anticipation of a glorious future:

The creation waits in eager expectation for the children of God to be revealed. For the creation was subjected to frustration, not by its own choice, but by the will of the one who subjected it, in hope that the creation itself will be liberated from its bondage to decay and brought into the freedom and glory of the children of God. (Romans 8:19-21)

Conclusion

As part of the Church’s conversation about the problem of natural evil, this essay is meant to be a brief introduction to a “theology of the cross”. One can explore this concept in greater detail in Murphy’s book The Cosmos in the Light of the Cross. While there is a lot more to be said, let me conclude with the following observation: though evolution may not be compatible with some interpretations of Christianity, evolutionary creation is certainly compatible with the crucified Christ and the theology of the cross. In the person of Jesus, God suffers with the world and ultimately redeems it. As George Murphy puts in, “The world's pains are God's stigmata.”¹⁸

Explore this Topic Further

• Miller, Keith. “And God saw that it was good”: Death and Pain in the Created Order. BioLogos series
• Murphy, George L. The Cosmos in the Light of the Cross. Harrisburg, PA: Trinity Press, 2003.
• Murphy, George L. “Cross, Evolution, and Theodicy: Telling It Like It Is”. In The Evolution of Evil. Edited by G. Bennett, M.J. Hewlett, T. Peters, and R.J. Russell. Göttingen: Vandenhoeck & Ruprecht, 2008.
• Southgate, Christopher. The Groaning of Creation: God, Evolution, and the Problem of Evil. Louisville, KY: Westminister John Knox Press, 2008.

Notes

1. Murphy, George L. The Cosmos in the Light of the Cross. Harrisburg, PA: Trinity Press, 2003.
2. Murphy, p34
3. “CRUX Sola Est Nostra Theologia,” in D. Martin Luthers Werke, Kritische Gesammtausgabe (Weimar: Hermann Boehlau, 1892), 5:172. The captitalization is in the original. Cited in Murphy, p26.
4. Murphy, p108
5. Murphy, p4
6. Murphy, p43
7. Murphy, p3
8. Some Christians ascribe animal death to some combination of Adam’s fall and Noah’s flood, but this does not resolve the problem that the animals are still suffering and dying through no fault of their own. See Keith Miller’s BioLogos series Death and Pain in the Created Order for the limitations inherent in a fall-based theodicy.
9. Rudwick, Martin. The meaning of fossils: Episodes in the history of paleontology. Chicago, University of Chicago Press, 1985.
10. See Jeff Schloss’ BioLogos essay Evolution, Creation, and the Sting of Death
11. Murphy, p63
12. Murphy, p122
13. Murphy, p27
14. This example is drawn from an evangelical outreach event held by a Christian student group in Innsbruck, Austria. On campus one day, they started conversations with their classmates by asking the question, “Would you wear an electric chair on your neck?”
15. Murphy, George L. The Trademark of God: A Christian Course in Creation, Evolution, and Salvation. Wilton, Conn.: Morehouse-Barlow, 1986.
16. Murphy, Cosmos in the Light of the Cross, p 31-32.
17. Murphy, p35
18. Murphy, p87

This week we feature the third clip from the upcoming documentary “From the Dust”, directed by filmmaker Ryan Pettey. It is our sincere hope that, above all else, the film can become a focal point for some of the big questions that inevitably arise at the intersection of science and faith. We believe Ryan's work will inform faith and enrich discussion, and we feel that this week’s topic, the Fall, is of particular importance for Christians as we think through the ramifications of creation by evolutionary mechanisms.

To help foster such dialogue, we are once again including several discussion questions with this week’s clip. In the transcript below, you’ll find several prompts that are meant to help viewers dig deeper into the material being presented. Mouse over each highlighted region and a question will appear on the side. We encourage you to watch this video with your friends, your churches, your small groups and Sunday School classes, your pastors -- or anyone else for that matter – and take some time to discuss what is being said (and maybe even what isn’t). You may not all agree, but you will find yourselves engaged in fruitful and spirited conversation. And it is this kind of conversation that will help move the science and faith discussion forward.

The provided questions are just a few of the discussion questions that go with this transcript, and we'd be happy to send them to you to foster further conversation within your church or small group setting. If you’d like to see the questions, or if you have stories from your own small group discussions about the clip, we would love to hear from you at info@biologos.org.

Editor's Note: The full documentary is now available on DVD and Blu-ray. You can order the film here, and learn more about the project here.

“The Fall” Transcript

Dr. Jeff Schloss: “My friends and colleagues, who have concerns about evolutionary theory for theological reasons, are onto something, and one of them involves the Fall, the nature of the Fall, what it is. Even if it is a metaphor, it is a metaphor for something, and what is that something? And how would we make sense of that something in light of evolutionary theory? The other issue on this has been probably the most serious issue that not only Christians, but all theists who believe in a good and providential God have wrestled with, it is the problem of natural evil.”

Reverend Dr. Michael Lloyd: “The problem of evil is a real problem to religious faith. It was certainly the thing for Darwin himself. That is what made him question his faith, and I think rightly so. It does not look like the sort of system that a good and loving and benevolent God would have set up. Now, obviously that raises huge questions because we don’t see any evidence of a world that was harmonious. We only see evidence of a world that was at war with itself, and that obviously is the problem that Christian theologians face. For a long time I used to believe that the Genesis narratives paint a picture of a world completely at peace, completely harmonious until the human fall, and then something goes wrong. When I began to look at it more closely, I began to think that there is more to it than that. There is evidence from the text that things are already dislocated, already out of joint. For one thing, there is the serpent, and however you interpret the serpent, here is a bit of the created order that is actively talking against God, working against God—so there is already something that has gone wrong. Secondly, there is the command to fill the earth and subdue it. There is the suggestion that something needs to be subdued, something is not quite right that needs to be put right and humans beings are called to do that—to put it right. And thirdly, it is a garden. It is almost as if God has said, ‘Here is a little bit I have done for you, here is a little bit of order and harmony that I have done for you. Now you go and spread that order and that harmony throughout the rest of creation.’ The tragedy is, of course, that human beings don’t do that. Rather than put that right, they make it worse.”

Dr. Alister McGrath: “Clearly Scripture distinguishes humanity from the rest of creation by this idea of the image of God. And that is understood in a number of ways—one of which is relational. Human beings have this God-given capacity to be able to relate to God, which is simply not there for the rest of creation. How do we understand that phrase: the image of God? If we accept the narrative of biological evolution, we have to say that at some point humanity became sufficiently distinguished from the rest of the natural world to be able to have this relationship with God.”

Reverend Dr. Michael Lloyd: “If you have a very finely graded gas tap and you begin to turn it on, initially, there is not enough gas in the air for the gas to ignite. So, you turn it up some more, still nothing, a bit more, still nothing, and a bit more, still nothing. At a particular point, there will be enough gas to air ratio for the thing to ignite. So, you can have a completely smooth, upward development, and yet, you can have something decisive happening at a particular moment. You get an increase in that moral capacity and moral awareness; you get an increase in their relational ability, in their social ability. You get an increase in their tool-making ability. You get an increase in their language. At a particular point there is enough of all that. There is enough relational capacity; there is enough social capacity and moral awareness and spiritual awareness for God to deal with us in a new way: ‘They have enough creativity to reflect the fact that I am the creator. They have enough relational capacity to reflect the fact that I am love. This in some way reflects who I am, and I will stamp my image upon them.’”

Reverend Dr. John Polkinghorne: “As hominids evolved and became more complex, then self-consciousness, in the sense of projecting our minds into the remote future or past began to dawn in them. And that didn’t bring biological death into the world, because obviously it had been there for millions of years beforehand, but it brought into the world what you might call mortality. Because our ancestors were self-conscious, they knew they were going to die. Because they had turned away from God, they had alienated themselves to the only one who was the ground for the hope of a destiny beyond death. And so, mortality, meaning the sadness, the human sadness at transiency and decay dawned in human life. Another very subtle feature of the Genesis 3 story is that it is a fall upwards as people would sometimes say. It is the gaining of some knowledge, the knowledge of good and evil, the story says. And so, the dawning of self-consciousness is also the gaining of something that wasn’t there before. What the serpent whispers in Eve’s ear is, ‘eat this fruit, and you will be like God. You won’t need God anymore. You can do it yourself.’ That is the fundamental sin, the fundamental mistake in human life is believing that we can do it on our own, doing it my way, and spiritual death is to deliberately and persistently cut yourself off from that. It doesn’t occur as an angry God giving you a punishment for not falling into line. It is simply that you have punished yourself. You know, preachers sometimes say that the gates of hell are locked from the inside not to keep the creatures in, but to keep God out. And that, I think in the end, is what spiritual death is if you persist in it. But God is always, I am sure, at work, seeking to draw people back into the divine love. I think that is the work that is necessary to understand what Paul is getting at in Romans 5 when he says that death came into the world through one man. The cost of development is a degree of precariousness. The people need the grace of God if we truly are to live fulfilling lives.”

Dr. Thompson responded that while the essence of Sin is ultimately mysterious, he suggests that there are some ways to think about Sin in the language of interpersonal neurobiology.

On the other hand, Dr. Smith found the wisdom of St. Augustine in The Confessions quite helpful—The essence of Sin is loving the wrong things in the wrong ways. It’s a disordered love.

We need to have an account of Sin in terms of habit. A lot of Christians today think of “sins” and discreet choices, but historically Christians have thought of Sin as a habitual tendency and disordering. It is formed over time—that’s what a vice is. Virtue and sanctification require ongoing re-habituation, a counter-formation of our inclinations.

Dr. Thompson followed up with a reference to Malcolm Gladwell’s Outliers and noted that people who are really good at what they do generally acquire it through lots of practice. Thompson then asked the audience, “How are we, in an embodied way, going to practice Christianity for 10,000 hours?”

We hope you have enjoyed this video series. If you'd like to learn more, we encourage you to read Curt Thompson's The Anatomy of the Soul and James K.A. Smith's Desiring the Kingdom: Worship, Worldview, and Cultural Formation. Dr. Smith also has a new book coming out this winter entitled Imagining the Kingdom: How Worship Works. ]]> Fri, 05 Oct 12 04:00:00 -0700 Curt Thompson, Smith, James K.A. http://biologos.org/blog/science-and-the-bible-theistic-evolution-part-4?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication http://biologos.org/blog/science-and-the-bible-theistic-evolution-part-4?utm_source=RSS_Feed&utm_medium=RSS&utm_campaign=RSS_Syndication Scientist-theologians who write about TE also think about creation and theodicy in terms of divine “kenosis” and eschatology. So today we’ll conclude our “implications” section by returning to creational theology, and then turn to the ways TEs re-think Adam and Eve in light of human evolution. Some implications and conclusions of Theistic Evolution—continued again

Last time I introduced the idea that a Christocentric theology of creation is one of the hallmarks of Theistic Evolution, and I focused on the idea of the “Crucified God.” But the scientist-theologians who write about TE also think about creation and theodicy in terms of divine “kenosis” and eschatology. So today we’ll conclude our “implications” section by returning to creational theology, and then turn to the ways TEs re-think Adam and Eve in light of human evolution.

Kenosis, theodicy and eschatology

John Polkinghorne and others, citing Philippians 2:7, like to speak about divine “kenosis”, God’s choice to “empty himself” in taking on human form; they apply this also to the act of creating the world in a great work of self-sacrificial love. Although Wikipedia gives much information about the roots of this doctrine in Orthodox and Catholic circles, my knowledge is minimal and I cannot confirm what I find there (though it might all be correct). According to a theologian I once consulted, kenosis in soteriology was discussed by Lutherans in the 17th century (if not perhaps even earlier, by others), but was only extended to theology of creation in recent decades. The most I can say with confidence is this: one of the most striking features of Protestant thought about nature, during and since the Scientific Revolution, is the degree to which it is not Christocentric in the sense we are now discussing. In much Protestant and Evangelical literature devoted to the topic of creation, one often looks in vain even for references to Jesus, let alone to Jesus as the suffering servant through whom the world was made,. Only in the latter part of the 20th century do I find a clear emphasis on the idea that nature is the creation of the God who put aside power and was crucified. If this understanding is correct, then I would say that it’s high time, and let’s get on with it!

TEs (especially Polkinghorne) are also in the forefront of those Christian writers who are linking theodicy inextricably with eschatology. Yet another scientist-theologian, Robert Russell, offers this powerful eschatological vision in Cosmology From Alpha to Omega, drawing on all of the main ideas I’ve presented in this section:

[I]n order to move us beyond mere kenosis to genuine eschatology, I believe that both kenotic theology and eschatology must be structured on a trinitarian doctrine of God. The reason here is simple: it is the trinitarian God who will act to bring about the redemption of all of nature since it is this God who is revealed as God in and through the cross and resurrection of Jesus. A kenotic theodicy (that God suffers voluntarily with the world) in and of itself is not redemptive. Eschatology is required, in which the Father who suffers the death of the Son acts anew at Easter to raise Jesus from the dead. In turn, the involuntary suffering of all of nature--each species and each individual creature--must be taken up into the voluntary suffering of Christ on the cross (theopassionism) and through it the voluntary suffering of the Father (patripassionism).(p. 266)

George MacDonald (source)

Because this series is primarily focused on the history of approaches to understanding Science and the Bible, I will not delve more deeply into these important theological issues, but only direct readers to resources such as these. Still, I close this section with a quotation from George MacDonald’s Unspoken Sermons, the same passage that C. S. Lewis used in abbreviated form as an epigram for The Problem of Pain:

“the Son of God, who, instead of accepting the sacrifice of one of his creatures to satisfy his justice or support his dignity, gave himself utterly unto them, and therein to the Father by doing his lovely will; who suffered unto the death, not that men might not suffer, but that their suffering might be like his, and lead them up to his perfection...”

Adam, the fall, and sin

(5) TEs have to confront questions about human origins that are much easier for OECs or YECs to answer: Did Adam and Eve really exist as historical persons? Was the “fall” an actual historical event? If not, what is the origin of sin?

Michelangelo Buonarroti, “The Fall and Expulsion from the Garden of Eden,” Cappella Sistina, Vatican (1509-10)

My comments here are much briefer, but I don’t mean to imply that the questions are any less important than the one I’ve just dealt with. Polkinghorne does not hold a traditional view of the fall, but he likes Reinhold Niebuhr’s view “that original sin is the only empirically verifiable Christian doctrine!” (Belief in God in an Age of Science, p. 88) This reminds me of G. K. Chesterton, who famously remarked, “Certain new theologians dispute original sin, which is the only part of Christian theology which can really be proved” (Orthodoxy, chap. 2). In other words, anyone who doubts the idea that we are “fallen” creatures simply needs to look around—that is all the evidence of our strong bent to wickedness that you’ll ever need.

There are ways to finesse the fall and evolution in a quasi-concordistic manner, such as the “headship” model advocated by Denis Alexander. Others reject any appeal to Concordism, stressing the principle of divine accommodation. For example, Denis Lamoureux argues that in the revelatory process the Holy Spirit came down to the level of understanding of the ancient Hebrews and used their ancient conception of de novo creation, in which humans were created quickly and completely. Thus, in Genesis chapters 2 and 3, Adam and Eve are ancient vessels that deliver the inerrant spiritual truths that God created us and that we are sinners.

The views that have received the most attention among evangelicals, however, are probably those of biblical scholar Peter Enns, particularly his new book, The Evolution of Adam. Instead of trying to summarize them myself, I’ll link his discussion of “Mistakes in the Adam/Evolution Discussion”, since it parallels some of the content in the book. Also see his replies to some evangelical scholars who have been critical of the book.

One of the most original and thoughtful proposals I have seen comes from philosopher Robin Collins (for bibliographical information on this and the other works cited in the rest of this column, see below). Collins calls his model the “Historical/Ideal” view, because “the original state described in the Garden story represents an ideal state that was never realized,” showing “what an ideal relation with God would be like.” Adam and Eve represent every person who has ever lived, but they also represent “the first hominids, or group of hominids, who had the capacity for free choice and self-consciousness.” Just as the first hominids made sinful choices, so do we now, and original sin involves “the resulting bondage to sin and spiritual darkness that is inherited from our ancestors and generated by our own choices.” I can’t convey the subtlety and thoroughness of this account in a short space, so those who want to know more will have to read for themselves. Conveniently, Collins provides a link to a “near final version” of his paper on his web site. If someone wants to summarize his arguments in a few paragraphs below, it would be a real service to our “course.”

Problems with historicity

(6) Questions about the historicity of Adam & Eve are underscored by evolution, but they would still come up even if Darwin had never existed and no one had ever proposed that humans and other animals have common ancestors. The Bible places Adam & Eve in a Neolithic world, with cities and agriculture, whereas non-biological scientific evidence shows that humans existed for a very long time before cities or agriculture came into existence.

Read that again. It’s a crucial point. Far too many people believe—erroneously—that evolution is responsible for undermining the historicity of Adam, Eve, and the Garden of Eden. In fact, the relevant science here is almost entirely from anthropology, not biology, and it involves human antiquity, not common ancestry. Since the mid-nineteenth century, evidence has been building that creatures anatomically and behaviorally identical to us have been on this planet for a very long time, far longer than the biblical 6,000 years. We could leave Darwin and evolution entirely out of the picture, and we would still be having a conversation about the historicity of Genesis 2 and 3. The same issues pertain to any OEC scenario. Most proponents of ID can’t duck this, either, even though they get to say “officially” that ID isn’t about the Bible. Because most ID proponents are not YECs, they accept the general validity of the methods used to date rocks and fossils, and so (by implication) this is their problem, too, whether or not it’s acknowledged.

To illustrate my point historically, let me introduce readers to George Frederick Wright (read more here and here). Ronald Numbers, the leading historian of American religion and science, wrote a clear, detailed article about this (see the reference below) that I strongly recommend to anyone who’s interest has been piqued. An influential Congregationalist clergyman and theologian, Wright was mentored by Harvard botanist Asa Gray, served briefly under Thomas C. Chamberlin on the U. S. Geological Survey, and even contributed articles on early humans and the ice age—his specialty—to scientific journals. During the 1870s, he worked closely with Gray to promote what is usually seen as a type of Theistic Evolution. By the early twentieth century, however, he appeared in some of his writings to have almost completely reversed his views on evolution. He even contributed an essay on “The Passing of Evolution” to the famous pamphlets, The Fundamentals, that later gave its name to that movement.

In other writings, however, Wright seemed to remain convinced of evolution, at one point saying that, “it is difficult to resist the conclusion that, so far as his physical organism is concerned, man is genetically connected with the highest order of the Mammalia.” Whatever he really thought about common ancestry—whether he was really a TE, an OEC, or an ID (one could make a good case for each)—the question of human antiquity dogged Wright for decades, as he sought ways to reconcile the genealogies in Genesis with accumulating evidence that humans have existed much longer than 6,000 years. Fortunately for Wright’s Christian faith, which probably hung in the balance, the famous Princeton theologian Benjamin Breckenridge Warfield, together with the conservative biblical scholar William Henry Green, managed to persuade Wright that the Genesis genealogies had plenty of wiggle room. Anyone wanting to see the crucial details should read Green’s paper on “Primeval Chronology” at this point. Note Warfield’s own conclusion (same URL): “There is no reason inherent in the nature of the Scriptural genealogies why a genealogy of ten recorded links, as each of those in Genesis v. and xi. is, may not represent an actual descent of a hundred or a thousand or ten thousand links.”

Can this really be true, without straining the whole idea of historicity? Davis Young’s skepticism seems appropriate here. How far back can we place Adam and Eve and still have contact with the biblical period? In my opinion, a clear and convincing picture of an historical Adam and Eve, reconciling the biblical picture with human antiquity, has not yet been produced, and I am doubtful that we will ever have one. Those who want more information about the possibilities and the difficulties are invited to consult the articles (cited below) by anthropologist James Hurd, evolutionary biologist David Wilcox, and anthropologist Dean Arnold. To the best of my knowledge, Hurd and Wilcox are TEs, while Arnold is an OEC. It’s up to you, my “students,” to consult these sources and place summaries and comments below. I’ve done enough already.

Looking Ahead

In about two weeks, I’ll conclude with a short history of Theistic Evolution. There’s plenty to think about in the interval. Please follow some of these links, borrow some of these books, and add your views to mine.

Citations

Dean Arnold, “How Do Scientific Views on Human Origins Relate to the Bible?” in Not Just Science, edited by Dorothy F. Chappell & E. David Cook (Zondervan, 2005), 129-40.

Robin Collins, “Evolution and Original Sin,” in Perspectives on an Evolving Creation, edited by Keith B. Miller (Eerdmans, 2003), 469-501.

James P. Hurd, “Hominids in the Garden?” in Perspectives on an Evolving Creation, 208-33.

Ronald L. Numbers, “George Frederick Wright: From Christian Darwinist to Fundamentalist,” Isis 79 (1988): 624–45.

David Wilcox, “Finding Adam: The Genetics of Human Origins,” in Perspectives on an Evolving Creation, 234-53.

In Part 2 of this series, we concluded by noting that, as Christian geologists willing to consider the possibility, we find no compelling evidence that the earth’s geological features can be explained by a global Flood. Here we consider three lines of evidence: global salt deposits, the order of deposition of sediment layers in the Grand Canyon, and the sequence of fossils in geological strata.

Salt Deposits

There are many places around the earth with layers of salt, some thousands of feet in thickness. Just off the southern coast of the United States in the Gulf of Mexico, thick salt deposits sit beneath thousands of feet of sediment (Fig. 1). These deposits lie within the layers that are said to have been deposited by the Flood.

We understand how salt beds form. At locations such as the Bonneville Salt Flats of Utah, or at the Dead Sea at the border of Israel and Jordan, salt is actively forming. Salt beds form when water is evaporated. During evaporation, the concentration of dissolved ions increases until the water cannot hold the salt in solution anymore and mineral salt begins to form. If a presently unknown or poorly understood process could produce salt without evaporation, as argued by young-earth advocates¹, it would quickly dissolve as soon as it came into contact with flood water, just as the salt from your saltshaker rapidly dissolves when added to water or moist food.

One might argue that the waters from the Flood could have evaporated to leave behind the salt deposits we see today, but there is a serious problem. The thousands of feet of sediment on top of the salt is also said to be from the Flood, meaning the flood waters cannot have evaporated to produce the salt and still be present and violent enough to transport thousands of feet of sediment to the same location. In other words, a single flood cannot be called upon to explain both the salt and the overlying sediment. For those who wish to argue that natural processes could have been vastly different during the Flood, there are at least two replies. First, under such a scenario, there is no point in Flood Geology studies any more than in normal studies, for nothing could be gained by the study of unknowable processes. A more important question, however, would be to ask why God would alter natural processes just to make Flood sediments look like they are not flood sediments. What would the purpose be? (We will revisit this thought later.)

Grand Canyon: Order of Deposition

The Grand Canyon is made up of a sequence of layers that defies any reasonable attempt to explain by a single flood. The alternating layers of limestone, sandstone and shale each form in unique environments. If these deposits were formed at different times under various sea-level stages, it is quite simple to explain the different grain sizes and rock types as a function of depth and distance from the shore line. If explained with a single catastrophic flood that abided by God’s natural laws of physics and chemistry, logic must be stretched beyond the breaking point.

As a very simple observation, consider instructions given in virtually every gardening book. A good soil will have a mix of sand, silt and clay. To determine the quality of your soil, you take a handful or two, put it in a clear container, add water and shake it up. When you stop shaking, the coarse grained material will settle out first resulting in a sequence of layers: sand on the bottom, then silt, then clay. You can readily see how much of each you have by the thickness of each layer.

This is informative of what we see in flood deposits. As moving flood waters slow down, finer and finer grained sediment settles out resulting in a “fining upward” sequence. If most of the Grand Canyon layers were laid down by the Flood, then we should see the same thing – a “fining upward” sequence. Instead, we see a series of alternating layers of fine and coarse grained material, with smaller-scale alternating layers within the larger ones (Fig. 2). Increasing the violence of a flood does nothing to negate the standard order of deposition. Repeated surging of flood waters across the surface likewise offers little explanatory power; in this case we might expect successive layers, each with their own “fining upward” sequence, but such is not what is observed. Further, the Grand Canyon includes multiple layers of limestone, which are never found in flood deposits of any magnitude. Even in floods as massive as one thought to have catastrophically deluged the once dry Mediterranean Sea basin with thousands of feet of water – limestone beds are conspicuously absent.

Fossil Sequence

If a massive flood were responsible for the fossil record, what would we expect to see? If the Flood was violent enough to rip chunks of rock up from the earth and move entire continents (standard Young Earth claims)², then it should be obvious that life forms from every imaginable niche would be tumbled and mixed together (Fig. 3a). We should find numerous examples of mammoths mixed with triceratops, and pterodactyls mixed with sparrows. Ferns and meadow flowers should be found in the same deposits, along with trilobites and whales. Further, we should find all major life forms still living today, for Genesis 7:8-9 is clear in stating that all terrestrial animals were preserved on the ark.

What we actually observe is far different (Fig. 3b). There is an orderly sequence where trilobites only occur in very old rocks, dinosaurs in later beds, and mammoths in still later layers. Organisms like flowers and ferns are present together in more recent deposits, but only ferns with no flowers are found in older deposits. Some readers will recognize this as an example from the “geologic column” and be tempted to discount it as a fabrication. For those thinking this way, consider what Henry Morris had to say in both editions of Scientific Creationism:

“Creationists do not question the general validity of the geologic column, however, at least as an indicator of the usual order of deposition of the fossils…”⁵

If we revisit the Grand Canyon for a moment, is it not striking that there is not a single dinosaur, mammoth or bird in the entire exposed sequence? Not one. To find these, you have to go to younger sediments found in deposits outside the canyon that have not been fully eroded away yet. How could such a lack of mixing be possible if the Flood was violent enough to move continents?

For more, be sure to read our FAQs How are the ages of the Earth and universe calculated? and What scientific evidence do we have about the first humans?, as well as our recent infographic How Do We Know the Earth is Old?.

Author's Note from Joy Walters

As I mentioned in my first post, I grew up skeptical of the whole idea of evolution. One contributor to my disbelief was the lengthy timescale for the “tree of life” that was presented with the theory. I would hear, for example, that dinosaurs lived hundreds of millions of years ago, but there was no explanation of why this was true; it was just given as a fact. No one explained the methods of dating, and so I thought biologists simply estimated the ages of species to fit their preconceived notions of how long it would take for one species to emerge from another. It also seemed like the ages were periodically revised and extended farther back in time, and I figured scientists needed to manipulate numbers to make evolution plausible. This, in my mind, made the theory both unbelievable and dismissible.

Once I learned about the techniques used to date fossils, I realized that my first impressions were wrong; the ancient ages of species are scientific determinations rather than scholarly conjectures. However, I have found in recent conversations that Christians remain skeptical of old ages and the evolutionary time scale. For this reason, I wanted the videocast to address the process of fossil dating (what the methods are and why they are accurate) while focusing on cases where hominid fossils were discovered and dated using these very methods. My hope is that Believers would be informed about the evidence for human evolution and its scientific grounding.

There are two opposite errors which need to be countered about the fossil record: 1) that it is so incomplete as to be of no value in interpreting patterns and trends in the history of life, and 2) that it is so good that we should expect a relatively complete record of the details of evolutionary transitions within all or most lineages.

What then is the quality of the fossil record? It can be confidently stated that only a very small fraction of the species that once lived on Earth have been preserved in the rock record and subsequently discovered and described by science.

There is an entire field of scientific research referred to as "taphonomy" -- literally, "the study of death." Taphonomic research includes investigating those processes active from the time of death of an organism until its final burial by sediment. These processes include decomposition, scavenging, mechanical destruction, transportation, and chemical dissolution and alteration. The ways in which the remains of organisms are subsequently mechanically and chemically altered after burial are also examined -- including the various processes of fossilization. Burial and "fossilization" of an organism's remains in no way guarantees its ultimate preservation as a fossil. Processes such as dissolution and recrystallization can remove all record of fossils from the rock. What we collect as fossils are thus the "lucky" organisms that have avoided the wide spectrum of destructive pre- and post-depositional processes arrayed against them.

Soft-bodied organisms, and organisms with non-mineralized skeletons have very little chance of preservation under most environmental conditions. Until the Cambrian nearly all organisms were soft-bodied, and even today the majority of species in marine communities are soft-bodied. The discovery of new soft-bodied fossil localities is always met with great enthusiasm. These localities typically turn up new species with unusual morphologies, and new higher taxa can be erected on the basis of a few specimens! Such localities are also erratically and widely spaced geographically and in geologic time.

Even those organisms with preservable hard parts are unlikely to be preserved under "normal" conditions. Studies of the fate of clam shells in shallow coastal waters reveal that shells are rapidly destroyed by scavenging, boring, chemical dissolution and breakage. Occasional burial during major storm events is one process that favors the incorporation of shells into the sedimentary record, and their ultimate preservation as fossils. Getting terrestrial vertebrate material into the fossil record is even more difficult. The terrestrial environment is a very destructive one: with decomposition and scavenging together with physical and chemical destruction by weathering.

The potential for fossil preservation varies dramatically from environment to environment. Preservation is enhanced under conditions that limit destructive physical and biological processes. Thus marine and fresh water environments with low oxygen levels, high salinities, or relatively high rates of sediment deposition favor preservation. Similarly, in some environments biochemical conditions can favor the early mineralization of skeletons and even soft tissues by a variety of compounds (eg. carbonate, silica, pyrite, and phosphate). The likelihood of preservation is thus highly variable. As a result, the fossil record is biased toward sampling the biota of certain types of environments, and against sampling the biota of others.

In addition to these preservational biases, the erosion, deformation and metamorphism of originally fossiliferous sedimentary rock have eliminated significant portions of the fossil record over geologic time. Furthermore, much of the fossil-bearing sedimentary record is hidden in the subsurface, or located in poorly accessible or little studied geographic areas. For these reasons, of those once-living species actually preserved in the fossil record, only a small portion have been discovered and described by science. However, there is also the promise of continued new and important discovery.

The forces arrayed against fossil preservation also guarantee that the earliest fossils known for a given animal group will always date to some time after that group first evolved. The fossil record always provides only minimum ages for the first appearance of organisms.

Because of the biases of the fossil record, the most abundant and geographically widespread species of hardpart-bearing organisms would tend to be best represented. Also, short-lived species that belonged to rapidly evolving lines of descent are less likely to be preserved than long-lived stable species. Because evolutionary change is probably most rapid within small isolated populations, a detailed species-by-species record of such evolutionary transitions is unlikely to be preserved. Furthermore, capturing such evolutionary events in the fossil record requires the fortuitous sampling of the particular geographic locality where the changes occurred.

Using the model of a branching tree of life, the expectation is for the preservation of isolated branches on an originally very bushy evolutionary tree. A few of these branches (lines of descent) would be fairly complete, while most are reconstructed with only very fragmentary evidence. As a result, the large-scale patterns of evolutionary history can generally be better discerned than the population-by-population or species-by-species transitions. Evolutionary trends over longer periods of time and across greater anatomical transitions can be followed by reconstructing the sequences in which anatomical features were acquired within an evolving branch of the tree of life.

I’d like to suggest that this argument is in significant ways misplaced. The participants in this debate all seem to agree that what makes us “human” can be defined by genes and population studies. There is a pressing need for them to conform theology to population genetics, or to conform population genetics to theology, because the story of our genes is implicitly equated with the story of what it means to be “human.” The hypothesis that there was a “first human” – a capital-A “Adam” – can be tested in our genes.

But “genes” do not make us “human.” What makes us “human” is the irreducible phenomena of all of our material and immaterial being as persons.

Nothing we observe in the universe is flat. By “flat” I mean having only one aspect or “layer.” Consider, for example, an apple. What is it? Is it the fruit of an apple tree? The seed-carrier – the potentiality – of new apple trees? Beautiful and delicious? Skin, flesh, and core? Water and organic molecules? Caloric energy and roughage? Hydrogen, oxygen, and carbon? Physical laws? All of these things comprise some of what we mean by “apple,” but none of them are what an “apple” is. The reality that is “apple” cannot be reduced to any one of its aspects or layers.

It is possible to think of these aspects or layers hierarchically, with “higher” layers that emerge from “lower” ones. Physical laws emerge from quantum probabilities; molecules emerge from physical laws; seeds, skin, flesh and core emerge from complex arrangements of molecules; beauty and delight emerge from the connection of skin, flesh and core to human sense perception;¹ “apple” emerges from all of this (and more) combined with the human cultural experience of this thing we call “apple.”

Notice that some “layers” can impinge or “supervene” on lower ones – for example, human sense perception and cultural experience do something to this thing confronting the subject in order for it to become “apple.” But notice also that “apple” is not merely a cultural construction. The word or signifier “apple,” of course, could be arbitrary, but there is an objective reality to the thing signified. The layer of human sense perception and cultural experience supervenes upon, but does not create, the lower-order reality from which it emerges.

Sociologist Christian Smith draws these strands together in a critical realist framework in his excellent book What Is a Person?: Rethinking Humanity, Social Life, and the Moral Good from the Person Up. In a critically realist approach to culture and human personhood, Smith suggests, “[h]uman beings do have an identifiable nature that is rooted in the natural world, although the character of human nature is such that it gives rise to capacities to construct variable meanings and identities….” Culture is a social construction, but it is not merely a social construction. Human beings are social, but they are not subsumed by the social. The reality we inhabit is “stratified”: it includes both the reality of individual conscious human agents and the reality of the social structures that emerge from the cultures created by those agents. These “personal” and “cultural” layers of the world interact with each other dynamically, each continually informing and changing the other.

Smith’s approach is helpful, but perhaps it does not go far enough. For Smith, as for critical realists in general, the phenomena of human culture remain subject to some degree of granular disaggregation, at least analytically. A phenomenological approach suggests that no “thing” can be broken into components and still comprise that “thing” – the genes that encode for apple trees are not apple seeds, apple seeds are not apple trees, and apple trees are not apples. The critical realist framework of stratification, emergence, and supervenience functions as a very useful heuristic device, but to describe what an apple is, we must approach the phenomenon of “apple” in its fullness. To know whether something falls into the kind “apple,” we must hold an ideal of everything an apple is, and compare the subject to the ideal.

And because of the transcendence of the ideal concept of “apple,” we can begin to speak of the relative excellence of particular instantiations of apples. What is an “excellent” apple? What distinguishes the excellent apple from a poor one? We can only ask such questions if “apple” means something more than the particular physical specimen in hand, whether firm, sweet and tart, or bruised and sour.

The same is true of human “persons.” We can say almost nothing about a “person” merely by observing genes, because genes are not “persons.” Populations genetics studies can provide models of the dispersion of genes through groups of biological entities, but they can tell us nothing whatsoever about when the first “human person” emerged. Indeed, for population genetics qua population genetics, there simply are no “persons” – for this is a science of the movement of genes, not a philosophical, sociological, or theological description of “persons.”

So what of “Adam?” It is often suggested that in Romans 5:12 Adam is a type of Christ. But, in fact, in Paul’s thought, as well as for the early Church Fathers, Christ is the type, the typos, a notion derived from the “stamp” or “seal” on an official document. There is a hint in Romans 5 of a truth that would only become clarified later in Christian theology – that the pre-incarnate Christ, the second person of the Trinity, always was. Whereas Arius declared that “there was a time when he [Christ] was not,” Nicea established the orthodox Christology of Christ’s eternal sonship. Thus Christ is and was the Redeemer, the one for whom creation was made and in whose death and resurrection creation always finds its fulfillment. Adam’s failure was that he went against type – he did not conform to Christ but rather tried to become something else, and thereby the true nature of humanity was broken.

Is the typos of Christ reducible to a set of genes? Surely not. It resides not in genes or in any other created thing but rather in the Triune life of God Himself. We might speak, in a roughly analogical way, of ideas we hold in our minds – say, the idea of a perfect Bordeaux, ruby-red, silky, smoky, plummy, luxurious. We could labor to instantiate that idea, combining genes and terroir and water and light and care, and perhaps we might achieve it, to the point where upon taking a sip we exclaim, “this – this – is Bordeaux. Nothing else is worthy of that name.”

This is what God said of Adam, when he gave him breath and a name. It is not something that God said of any other creature, even apparently some creatures that a modern population geneticist or paleoanthropologist might designate as ancestrally human based on genes or bones. Yet that Adam, and each of us in that Adam, fail to participate fully and unreservedly in the true nature of the true human, the nature of Christ. And so Pontius Pilot, an unwitting prophet, said of Christ: “behold, the man” (John 19:5, KJV). And so also Paul invites us to see: the sinful man, the broken seal, the first created Adam; and the true type, the seal of humanity’s future, the perfect Adam, the Christ. None of this is about the definitions and categories of modern science, as helpful and important as they may be for the progress of scientific thought. It is, rather, about the fullness of what it means to be human.

Notes

1. Human sense perception, of course, is an emergent property of an even more complex set of relations that give rise to the human “person.”

The song entitled “The Fall” by Gungor is from the artists’ latest album Ghosts Upon the Earth. The lyrics begin by painting a picture of the Fall as something in which each person has participated as indicated by the assertion that “the fruit (of the Fall of man) is seen in every eye and every hand.” After reflecting on the words, consider the discussion questions below.

“The Fall” by Gungor

The Fall, the Fall, Oh God, the Fall of man,
The fruit is found in every eye and every hand,
Nothing, there is nothing yet in truest form,
We walk like ghosts upon the Earth,
The ground it groans.

How long? How long will you wait?
How long? How long till you save us all, save us all?

Turn your face to me; turn your face to me.
Turn your face to me; turn your face to me.

The light, the light, the morning light is gone,
And all that is left is fragile breath and failing lungs.
The night, the night, the guiding night has come,
Uniting lover with his bride more precious than the dawn.

How long? How long must we wait?

Turn your face to me; turn your face to me.
Turn your face to me; turn your face to me.

Questions

1. By focusing only on the Fall as a historical event, have we consciously or unconsciously simplified it—almost removing ourselves from the story?

2. Besides Genesis 3, what other Scripture has inspired the opening lines of this song? Does the feeling evoked by these opening lines personalize that passage for you?

3. Have you ever felt: “the light, the light, the morning light is gone?” Have you experienced night as “guiding?” Who is the lover? What Scripture informs these lines?

4. Have you ever asked, “How long? How long?” Have you heard the answer, “Turn your face to me. Turn your face to me?”

5. Do you agree that the story of Adam and Eve is your story, except for one important difference? What is that difference for you?

Michael Gungor has also served as a pastor at the Bloom Church in Denver, Colorado. Below we post an excerpt from a sermon he has given on his own personal journey and his views about science and Scripture.

(To hear the entire sermon go to this link and scroll to sermon of March 8, 2009—“What Can We Learn About Jesus from Science?”)

Today's video is courtesy of filmmaker Ryan Pettey, director/editor of Satellite Pictures and features physicist Ard Louis.

In today's video, Oxford physicist Ard Louis discusses the famous debate between renowned evolutionary biologists Stephen Jay Gould and Simon Conway Morris. Gould believed (and wrote in his book Wonderful Life) that if the "tape" of evolution were rerun, the chance that anything like human intelligence would emerge is essentially zero. In other words, humanity is here through random accident. Gould pointed to the work of Morris and fellow scientists in their research of the Burgess Shale as evidence for this view.

However, Morris himself disagrees, pointing to what is called evolutionary convergence. As Morris notes, there are numerous examples of identical features evolving multiple times throughout the history of life independently. Morris believes that if the tape of life were replayed, we would see something like humans emerge. A Christian might say, it looks like we were planned.

Some Christians might find Simon Conway Morris' viewpoint, with its implicit teleology, more attractive. Others, perhaps motivated by a high view of providence, may find Gould's emphasis on contingency equally congenial to their faith. What do you think?

In our previous essay, we learned that a tree summarizing species relationships can be built using DNA information, and how we can use DNA as a “molecular clock” to date ancient events. Both of these methods have made specific predictions about the origin of whales. If evolution is true: whales are related to the even-toed hoofed mammals and should share common ancestors with them; transitional fossil forms dating from about 45 to 50 million years ago should be found which can be shown to be related to both the even-toed hoofed mammals and modern whales; whales are most closely related to modern hippos, and should share a common ancestor with them.

What other types of information might we be able to use to construct a phylogenetic tree (i.e. a family tree) of species relationships? It turns out that characteristics of body structure also can be used – for example, the presence or absence of certain bones, or the specific shapes of those bones. An advantage of using bony features is that they can be recovered from fossils, whereas DNA (with only certain limited exceptions) must come from living organisms.

We can also derive functional information from an examination of bony features. The various protrusions, bumps and knobs found on bones usually have important implications. For example, smooth rounded areas at the ends of bones allow them to fit together and move easily. The shapes of such surfaces determine which bone motions are “allowed” or “disallowed”. Consider, for example, the motion of the forearm against the upper arm at the elbow. This is a “hinge” joint, whose normal motion is defined by the shapes of the upper arm bone and one of the forearm bones, where they meet each other. You might normally exercise the action of this hinge joint when you pick up a cup of coffee, bring it to your mouth, then set it back down again. Let’s try to imagine another motion. For this exercise we first need to get our arm into the proper starting position. Place your arm at your side, bent at the elbow at a ninety degree angle, with your palm up. Now, while keeping your palm up, let’s attempt to move your arm only at the elbow (no shoulder motion – that’s cheating!). Now swing your forearm out to the side and attempt to end up with your fingers pointed directly away from your side. Most of you will not be able to do this. If you can, it’s because your shoulder is rotating in spite of yourself. This motion at the elbow is normally not allowed. Hence a careful analysis of bone shapes can allow us to infer how the bones were used. This in turn can assist us in the task of phylogenetic (evolutionary) classification of organisms. That is, we will have more confidence in the grouping together of animals in our tree diagram if corresponding bones are used functionally in the same way.

Therefore we would expect that we could use various bony features to help us examine the predictions generated by our previous look at different types of DNA data. Are there any bony features that are particularly relevant to the even-toed hoofed mammals? Well, it turns out that there are. These are mainly running animals, and there are several features of their ankle bones, which taken together define the “allowed” motions which make them efficient runners. If one takes the various ankle bones of a large group of mammals, examines them carefully to note their shapes, scores that information into a table, then uses a computer program to build a phylogenetic tree, it turns out that all the even-toed hoofed mammals are placed together. So far, so good. But what about whales? Well, now we have an obvious problem. Modern whales are very specialized, - they have flippers which correspond to the forelimbs, and they have almost no hind limbs! I say “almost” because they do have small pelvic bones, which are not attached to the rest of their skeletons. But they certainly have no ankles. This is where the fossils should come in – if evolution is true, we should expect to be able to identify transitional fossils which are ancestral to whales which contain the characteristic ankle bony features of the even-toed hoofed mammals.

Now let’s look at bony features from the whale perspective. We have already mentioned the almost complete loss of hind limbs, and the presence of forelimbs modified into flippers. In addition, as air breathers, whales have a blowhole at the top of their skull. And as powerful swimmers, which use a large tail fluke in vertical motions, whales have enormous sets of muscles which attach to enlarged projections from their vertebral column. So if evolution is true, we should begin to see fossil forms which manifest changes in bony features which correspond to the gradual accumulation of these whale-like characteristics. However, we still need more, because these various bony features all would be expected to occur in largely or exclusively aquatic forms. We might expect this to correspond to the later stages of a transition from terrestrial even-toed hoofed mammals. But what about the earlier stages? It would be very helpful if we had some “defining” characteristic of whales, similar to the ankle structure of even-toed hoofed mammals.

It turns out that the structure of the bones of the skull and ear apparatus of whales are highly modified to allow efficient hearing underwater. The mechanical aspects of efficiently receiving sound through water are somewhat different than receiving sound travelling through air. If evolution is true, we should expect to be able to find key transitional fossil forms with a progressive series of modifications of the skull and ear bones, features which would not be found in any other mammals.

Now that we know what we should expect to see, if evolution is true, let’s look at what has actually been found in the fossil record. Over the last fifteen years or so, a series of fossils, many of them discovered in the Indian subcontinent, have fulfilled nearly all of our predictions.^1,2 Let’s look at the figure below (Figure 1), reproduced from a recent popular book on evolution.³ This shows a series of fossils, arranged in approximate chronological order, with a modern whale at the top. How old are these fossil forms? The entire fossil progression illustrated occurs from a little over 50 million years ago to about 40 million years ago. So a remarkable alteration in general body form occurred in a little over 10 million years. This time frame agrees well with the previous prediction from the DNA “clock” that we discussed in our previous essay. Second, the general change in body shape corresponds to what we predicted in our discussion of whale bony features above. That is, there is a gradual elongation and streamlining, there is a modification of the forelimb into flippers and progressive reduction of the hindlimb, the nostrils for breathing move toward the top of the skull to form a blowhole (not obvious from the diagram), and the vertebrae develop enlarged projections to support the attachment of swimming muscles.

Figure 1: Skeletons and Body Forms of Modern Whales and Fossil Ancestors
The reconstructed skeletons (black) from modern whales (top) and various ancestral skeletal forms (series below) are in chronological order (from Pakicetus up). Indohyus is an extinct whale “cousin”. Relative body size, to scale, is indicated by the gray shapes at the right of each animal.

There is probably little question that the last fossil species in the figure (Durodon) is well on the way to becoming a modern whale. However, it might be argued by a skeptic that the earlier species (like Rhodocetus, Ambulocetus, or Pakicetus), despite the “cetus” (whale) part of their names, are not so obviously “whale-like” that they deserve to be considered as fossil whale ancestors. However, remember the characteristic whale skull modifications for hearing? It has been shown very clearly that throughout this series of fossil species, the various bony changes necessary to support efficient hearing in water were being acquired in a stepwise fashion. Organisms earlier in the sequence had skeletal characteristics consistent with them being able to hear well in both air (using the “classic” mammalian hearing apparatus), and newly acquired changes to also allow better hearing in water. Later organisms in the sequence become increasingly specialized for hearing in water only.⁴

What of the earliest fossil shown in this diagram –Pakicetus? Careful examination shows that it has the features we would predict for an early whale ancestor. It has the ankle bone characteristics of the even-toed hoofed mammals (in fact these features are also found in several of the later fossil forms as well, ensuring their continuity). This confirms one of the predictions made by the DNA evidence we discussed earlier. Furthermore, it has some of the modifications of the skull bones necessary for more efficient underwater hearing, which were previously documented only for modern whales and their later (more obvious) ancestors.⁴ These features are also shared with the “whale cousin” Indohyus.⁵ Preservation of more of the skeleton of this latter species has allowed detailed analysis indicating characteristics likely shared with whale ancestors. Indohyus was probably a wading animal, which spent much of its time in the water. It appears to have fed mostly on land, so it is suggested that resort to the water was made to escape predators.⁵

Finally, we need to look back at the last prediction from our previous DNA evidence, namely that modern whales are most closely related to hippos. If evolution is true, we should expect to find fossil forms linking these two modern groups. This has proven to be a tougher nut to crack, mainly because the ancestral whales first appear about 50 million years ago in what is now south Asia, and the hippo family first appears about 15 million years ago, in Africa. The most recent tree diagram, produced by using a combination of skeletal features and DNA data, still supports this family connection, as shown by the following figure (Figure 2).⁶

Figure 2: Phylogenetic Tree Showing the Relationship of Modern Whales to Living and Extinct Even-Toed Hoofed Mammals
This tree is based on both bony features and DNA data. The organisms presented in blue are semi-aquatic or aquatic forms. Organisms shown in green are terrestrial even-toed hoofed mammals (Artiodactyls). In black is shown a member of the odd-toed hoofed mammals. In red is an extinct fossil ancestor group. (This figure is adapted from Fig 1a in Reference 6).

The blue lines in the diagram show species in which the skeleton is specially thickened, and the bone structure more dense. This is an adaptation which allows wading animals (like modern hippos and the fossil Indohyus) to be good “bottom-walkers” (it prevents them from floating due to lighter body tissues), and allows fully marine organisms (like modern whales) to have “neutral buoyancy” (so they don’t always tend to pop up to the water surface, like a cork). There has also been progress in clarifying the relationships between fossil ancestors of hippos and those of modern whales. A recent study of hippo evolution, based only on skeletal characteristics, has conclusively shown that the hippo family are descended from an extinct group of fossil Artiodactyls, known to go back more than 40 million years, and whose fossils are from southern Asia. Furthermore, this study produced a phylogenetic tree predicting that this extinct hippo ancestor group also shared a common ancestor with the fossil whales.⁷ Thus the investigation of hippo origins is independently leading us back toward the origin of whales. However, in this study the statistical support for predicted common ancestor of the ancient hippo group and the ancient whale group is not as strong as scientists would like to consider this “case closed”. What is necessary is more fossils, of the appropriate age in order to complete the story of hippo evolution. We still need that to fill in the details of the predicted relationship of hippos to modern whales.

Thus the “Whales’ Tale” is not yet complete. It is a story of scientific discovery in progress. As we finish, let’s briefly summarize what we have found out. Different types of DNA evidence agree that modern whales are most closely related to the even-toed hoofed mammals, despite the obvious great changes in limb anatomy of the modern whales. This prediction has been amply confirmed by the fossil record. The DNA sequence evidence predicted a time frame during which critical early events in evolution of whale ancestors should occur. This prediction has also been amply confirmed. Finally, DNA evidence predicts that modern whales are most closely related to hippos. There is some fossil evidence supporting a predicted common ancestor, but more data is needed. A final caution to possible sceptics – this state of “unfinished business” is precisely how the scientific process works. There is no “crisis”. There is no indication that evolution is not true. There is simply the ongoing work of mapping out of various lines of evidence. A scientific conclusion is considered well supported if “all roads lead to Rome”. In the case of whale evolution it might be prudent to say that the evidence has not quite converged in Rome yet, but that we are now in the suburbs. That is precisely what makes science interesting and fun. Stay tuned!

The next blog in this series can be found here.

References:

1: Thewissen J.G.M., Williams E.M., Roe L.J. and Hussain S.T. 2001. Skeletons of terrestrial cetaceans and the relationship of whales to artiodactyls. Nature. 413: 277-281.

2: Gingerich P.D., ul Haq M., Zalmout I.S., Khan I.H., Malkani M.S. 2001. Origin of Whales from Early Artiodactyls: Hands and Feet of Eocene Protocetidae from Pakistan. Science. 293:2239-2242.

3: Coyne, J.A. 2009. Why Evolution is True. Viking Penguin, New York. Pg 50.

4: Numella S., Thewissen J.G.M., Bajpai S.,Hussain T., Kumar K. 2007. Sound Transmission in Archaic and Modern Whales: Anatomical Adaptations for Underwater Hearing. The Anatomical Record. 290:716-733.

5: Thewissen J.G.M., Cooper L.N., Clementz M.T., Bajpai S., Tiwari B.N. 2007. Whales originated from aquatic artiodactyls in the Eocene epoch of India. Nature. 450:1190-1194.

6: Geisler J.H. and Theodor J.M. 2009. Hippopotamus and whale phylogeny. Nature. 458:E1-E4.

7: Boisserie J.-R., Lihoreau F., Brunet M. 2005. The position of Hippopotamidae within Cetartiodactyla. Proceedings of the National Academy of Sciences U.S.A. 102(5):1537-1541.

Today's video is courtesy of filmmaker Ryan Pettey, director/editor of Satellite Pictures.

Video transcript

I think there are sometimes a couple of biblical images we struggle to lay hold of. In the New Testament we find when we talk about life, we have the idea of living or ‘bios’. In other words, we talk about how we are alive. But Jesus talks about the fact of “coming to life “ when we know him. That doesn’t suddenly mean that our heart starts beating. It means that there is this whole side to us which was dead… which wasn’t alive and is now… that has actually sprung to life. And we run into complications maybe if we reduce all of these things into exactly the same categories. Now you can have the same issues with ‘death’ too. That word is used in many ways, and different words are used to try and signify various different things.

Now what is interesting is that if you go back into the Genesis account, it says “now do not eat this [apple] or you will surely die”. There is a whole chain of events that happens when Adam and Eve decide they want to walk away from God. The first thing that happens is that they cover themselves up. There’s like a psychological alienation that comes. They are no longer happy with the way they are. The next thing that happens is God steps into the garden, they run and hide. There is spiritual alienation. The voice that was once welcoming where they went, they now find themselves cut off from that. Then there is a social alienation that comes as a result of turning away from God. They start blaming each other. There is a vocational alienation that comes as a result of, of course, judgment. That which was meant to be home for them, all work become labor, and we could keep going.

So when we talk about “death” the picture, to me, seems to be much bigger, much fuller. I can’t think of a more comprehensive view of possibly what it could mean. And so I think we need to again break away from a straight forward, in fact, mechanistic understanding. In no way do I think that impoverishes either or understanding of the gospel or of the cross. As a matter of fact, it enhances it. It makes the work of the cross even more incredible and it makes the idea that God is looking for redemption from us more complete. We are not talking simply about the idea of physically living forever because that’s clearly not what it means. We know that we are going to physically die. All of us. But when you think about it in terms of what that means psychologically, spiritually, emotionally, socially, vocationally and so on it becomes a huge picture. The text is teaching us something which is real, which is true, which is there. I think we just need a bigger more sophisticated handling of the text, than a reductionist one that I think actually impoverishes or understanding of The Fall, the cross, redemption, the ‘coming again’ and so on.

In the rest of the series, we will look closely at the evolutionary explanation for the blueprint. That explanation postulates that tetrapod limbs arose during a particular era in life's history, and that they arose as modifications of the fins of fish. And the evolutionary explanation isn't just an interesting idea. It's a comprehensive explanation – it helps us to understand bones, fossils, genes, chemical signaling systems. It provides a coherent framework for understanding why limbs are the way they are, and how they got that way.

Comparing the anatomy of tetrapod vertebrates and fish

The idea that tetrapods arose from fish is not new; E.D. Cope proposed in 1892 that tetrapods descended from lobe-finned fish. (Modern lobe-finned fishes include coelacanths and lungfish, and comprise one of two divisions of the bony fishes. The other division, the ray-finned fishes, includes most familiar kinds of fish.) In the early days, biologists inferred ancestral relationships between species largely through comparative anatomy and embryology: they would carefully classify organisms according to their structure (including their structure during development) and look for relationships that generated nested hierarchies. A simple nested hierarchy goes something like this: 1) animals with backbones; 2) animals with backbones and limbs; and 3) animals with backbones, limbs, and hair. Animals in group 3 also belong to groups 1 and 2, while animals in group 2 also belong to group 1, and so the groups together define a nested hierarchy. Such studies alone could have led some scientists to infer an ancestral relationship between fish and tetrapods, and perhaps those studies did convince them. But then there were fossils of various types of fish and other vertebrates, many long extinct. That fossil record was relatively sketchy in 1892, but it nevertheless led Cope and others to conclude that certain fish had given rise to tetrapods at a particular time in natural history.

The fossil record shows a fish-to-tetrapod transition

Here are some basic findings from the fossil record that suggest a fish-to-tetrapod transition and that have been known for decades:

• Fish, including fish with bones, lived on the earth before tetrapods appeared. Specifically, fossils of bony fish first appear in rocks from about 420 million years ago.

• Tetrapods appear in the fossil record at a particular point in history and then persist and diversify in subsequent eons. Their arrival was long thought to have occurred about 365 million years ago, although some recent findings have challenged that hypothesis.

• Tetrapods that still had some fishy features were prowling the planet 365 million years ago.

• Lobe-finned fish that were starting to look more like tetrapods were eating other fish about 385 million years ago.

Even many decades ago, there were hints that something interesting happened between 400 million years ago and 365 million years ago. Let's take a close look at the ancient animals that suggest the fish-to-tetrapod transition.

Ancient animals

The most primitive known tetrapods for which we have skeletal remains lived 365 million years ago. They were undeniably tetrapods, but there was definitely something fishy about them. (Heh heh.) One of the most famous of these creatures is Acanthostega, discovered in 1987 by British paleontologist Jennifer Clack and pictured below. Acanthostega is a card-carrying tetrapod, with fingers and toes. But it has a fish tail, with fin rays. Another well-known primitive tetrapod is Ichthyostega, which lived around the same time as Acanthostega. Like Acanthostega, it is a true tetrapod, but has several odd fish-like structural features. For example, its skull is more fish-like than that of Acanthostega. In summary, both Acanthostega and Ichthyostega already used the limb blueprint, even though both also had some fish-like anatomical characteristics. Their presence 365 million years ago shows that tetrapods must be at least that old, and their mixture of anatomical features suggests that the transition happened not long before that.

And what about the lobe-finned fish that looked a bit tetrapod-ish? That animal is Panderichthys, described as “vaguely crocodile-shaped” with skeletal features that were tetrapod-like. Specifically, this ancient fish had tetrapod-like “shoulders,” and recent analysis found some finger-like bones at the ends of the fins. The creature also had a breathing hole on the top of its head. These fish lived around 385 million years ago.

The hunt for the earliest tetrapods

Taken together, these observations suggested that the fish-to-tetrapod transition occurred between 385 and 365 million years ago. Eager to see what that transition looked like, scientists began to look for 375 million-year-old rocks in which they might find animals at the beginning of tetrapod-hood. They wanted to catch evolution in the act.

Let's stop and think about this, because it's cool and because it's important to note the extent to which evolutionary biology is hypothesis-driven. Critics of evolution sometimes portray the theory as an untestable historical conjecture, depicting it as fundamentally different from experimental science in the lab. But the hunt for the earliest tetrapods was an effort to test a hypothesis that had generated a prediction. Based on the hypothesis that lobe-finned fish were ancestors of tetrapods, scientists predicted that intermediate animals, “fishapods,” would be found in the gap between Panderichthys and Acanthostega. To evaluate the prediction, all they needed to do was find some suitable 375 million-year-old rocks.

Neil Shubin describes that search in the first chapter of Your Inner Fish. He and his colleagues found suitable rocks in the islands of the Arctic: the right age, nicely exposed (by erosion), and representative of the kind of environment that their quarry would frequent – freshwater streams. They made their biggest discovery on their last trip (“a do-or-die situation”) in 2004. That discovery was Tiktaalik roseae, the “fishapod.”

The “fishapod”

Tiktaalik roseae is one of the most extraordinary fossil intermediates ever described, and its public debut in 2006 was front-page news. An artist's conception of the animal is pictured below.

There are several aspects of the anatomy of Tiktaalik that earn it the title “fishapod.” Like a good fish, it had scales and webbed fins. Like a tetrapod (more specifically, like a crocodile), it had a flat head, with eyes on the top of the head, and it had a neck. But what about those fins? Or are they limbs? Remarkably, the answer seems to be, “both.”

The fins of Tiktaalik were part fish fin, part tetrapod limb. On the outside, they looked like fins, with webbing. On the inside, though, these fins were clearly tetrapod-like. Amazingly, the fins of Tiktaalik were built using a primitive version of the limb blueprint: one bone, two bones, blobs, digits. As Shubin writes in Your Inner Fish, “We had a fish with a wrist.” (The Tiktaalik roseae web site at the University of Chicago is a great source for images and more information.)

Let's address three questions about Tiktaalik that might have occurred to you. First, why might animals like Tiktaalik have developed tetrapod-like fins? Shubin and his colleagues suggest that these limb-like fins may have been useful for doing “push-ups” in the shallow water. (Like Panderichthys, Tiktaalik had a breathing hole on top of its head and was clearly adapted for living and moving in shallow water.) Second, is Tiktaalik an ancestor of all tetrapods? No, not necessarily. What Tiktaalik shows us is that animals were developing tetrapod features in the context of fish bodies, and Tiktaalik shows us the context (shallow water) in which this likely occurred. But that doesn't mean that our lineage arose from Tiktaalik itself. Finally, is Tiktaalik now the oldest tetrapod? No, apparently not. For one thing, Tiktaalik is truly transitional, and probably therefore not worthy of full tetrapod membership. But more notably, data published in 2010 show that tetrapods are a lot older than was thought at the time of Tiktaalik's discovery. The new findings show footprints that are unmistakably those of a tetrapod, in rocks about 395 million years old. Surprisingly, then, tetrapods were already on their way long before Neil Shubin's specimen lived. Tiktaalik is truly a fish/tetrapod intermediate, which was living at the same time as animals that were fully tetrapods. A simple story of succession, in which intermediates disappear and are replaced by less intermediate types, seems to be an oversimplification.

In conclusion, the fossil record provides evidence that the fins of fish and the limbs of tetrapods are related by ancestry: limbs seem to be modified versions of fins. What other evidence supports this proposal? In the next post, we will turn to developmental biology, and explore the meaning of the term 'homology.'

Further reading:

Neil Shubin (2009) Your Inner Fish: A Journey Into the 3.5-Billion-Year History of the Human Body. New York: Vintage Books.

Carl Zimmer (2006) A Fin is a Limb is a Wing: How Evolution Fashioned its Masterworks. Online at NationalGeographic.com.

Tiktaalik roseae website at the University of Chicago.

Jennifer Clack's website at the University of Cambridge.

Images are from Wikipedia.

Though some may believe that moving the science/faith dialogue forward is best left to scientists, scholars, and theologians, we at BioLogos recognize that our pastors play an invaluable role in the conversation. Across the globe, pastors are helping their congregations work through difficult issues of science and faith with honesty, insight, and a gentle spirit. To this end we present an ongoing series recognizing sermons (and the pastors who give them) that are helping to promote the harmony of science and faith. Today's sermon comes from Rev. Tim Keller, pastor of Redeemer Presbyterian Church. Click above to hear an excerpt. Below, is a brief summary written by BioLogos editorial staff. The full sermon, which we highly recommend can be purchased from Redeemer’s sermon store. Finally, if you know a sermon or podcast related to science and faith that has especially spoken to you, please let us know.

In tracing the fluid storyline of the Bible, Dr. Keller has first focused on the early chapters of Genesis, emphasizing both the ordained purpose of creation and the great Fall of humanity. The latter addresses the pressing question: what is wrong with the world? Scripture explains that Sin is responsible for the seen destruction and chaos. Through a close reading of the story of Cain and Able in Genesis 4: 1-10, Keller draws attention to the significant aspects of Sin—its potency and subtlety—as well as to the text’s foreshadow to the coming Messiah who will conquer Sin, once and for all.

Foremost, God’s description of Sin stresses its deadly power. In this story, Cain becomes angry when the Lord is not pleased with his offering. Then, the Lord comes to him, and tells him, “But if you do not do what is right, Sin is crouching at the door. Its desire is to have you, but you must master it.” This image characterizes Sin as a predatory animal lurking in the shadows, eagerly waiting to kill its prey at the opportune time. It seems from this verse that Sin is an abiding, growing presence. A person is not overcome by it in a single action, but in a series of actions through which sin gains dominance in one’s life. In a quote from Mere Christianity, C.S. Lewis suggests that the “bigness or the smallness of the sin seen from the outside is not what really matters,” but it is the “twist in the central self” that dooms a man to destruction. Reflecting on this thought, Dr. Keller explains that first “you do sin, but then sin does you,” unless one turns to God in repentance. This picture of sin “crouching” also points to its hidden nature. It does not pounce on a person in plain sight, but stalks about in the darkness, in the places where vision is obscured. This is evident in the way one seeks to rationalize his or her shortcomings. When ignored, this force will overtake and kill a person; it should not be taken lightly.

Next, this narrative highlights the subtlety of Sin. The account clearly states that God looks upon Abel and his offering with favor, but does not look upon Cain and his offering with approval. This suggests that God prospers one, but not the other. Yet, no explanation is offered as to why God is displeased with Cain. Outwardly, they appear nearly identical—both present sacrifices before the Lord. Looking carefully at different verses, Dr. Keller explains that it’s a hidden issue of Cain’s heart. While Abel brought the firstborn of his flock, Cain brought forth some fruits of the soil. Since he cannot be sure of the increase of his flock without new offspring, offering a firstborn lamb demonstrated great faith on Abel’s part. However, Cain needs little faith to bring forth only a portion from his plentiful produce. In God’s eyes, Abel expresses gratitude and trust, while Cain seeks to earn his favor.

Then, when Cain murders Abel, God comes asking questions of Cain saying, “Where is your brother Abel” and “What have you done?” This is not to gain insight but to reveal to Cain his own heart. God, in his grace, has come to counsel him. However, God says in Genesis 4:10b (NASB), “The voice of your brother’s blood is crying to Me from the ground.” In other words, God, being just, cannot ignore sin. In this case, it is the shedding of innocent blood. The Lord’s response demonstrates his gracious and just character.

Finally, triumph over Sin comes through Jesus Christ, the ultimate Abel figure. Jesus appears to a people filled with Cain hearts. They outwardly follow religious practices in the name of God, offering sacrifices and observing the Law, but inwardly breed corruption. They see Jesus’ loving spirit, and they despise him. They condemn Jesus to death, but he goes willingly for the sake of destroying all sin and death in the world. According to the book of Hebrews, it is now his sprinkled blood that “speaks better than the blood of Able” over humanity. Since Jesus paid the full price for every sin committed, God can no longer condemn those who have received the blood of his Son. His justice is now offering grace and love and life everlasting to all.