Tag Archives: Cambrian Explosion

Podcasts

Stephen C. Meyer debates Charles Marshall on the Cambrian explosion

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Here is a summary of recent podcast of Unbelievable between intelligent design proponent Stephen C. Meyer and UC Berkeley evolutionary biologist Charles Marshall. Dr. Marshall had previously reviewed Dr. meyer’s new book “Darwin’s Doubt” in the prestigious peer-reviewed journal “Science”.

Details:

Stephen C Meyer is the world’s leading Intelligent Design proponent. His new book Darwin’s Doubt claims that the Cambrian fossil record, which saw an “explosion” of new life forms in a short space of time, is evidence for ID.

Evolutionary biologist Charles Marshall of the University of California, Berkeley has written a critical review of the book. He debates Meyer on whether Darwinian evolution can explain the diversity of life in the Cambrian rocks.

For Meyer & Darwin’s Doubt http://www.darwinsdoubt.com/

For Charles Marshall’s reviewhttp://www.sciencemag.org/content/341/6152/1344.1.full

You can get the MP3 file here.

The brief summary this time is not provided by me, it’s from Evolution News.

Excerpt:

This past weekend Britain’s Premier radio network broadcast a debate between Stephen Meyer and UC Berkeley paleontologist Charles Marshall, recorded at the beginning of November. As David Klinghoffer noted yesterday, the subject of the debate was Meyer’s book Darwin’s Doubt. Yes, that’s the same Charles Marshall who reviewed Darwin’s Doubt in Science back in September. See here for our multiple responses.

It was an excellent debate, with both participants offering important insights and good arguments, though in my opinion Meyer unquestionably had the better of it, especially concerning the key scientific question of the origin of the information necessary to build the Cambrian animals. Nevertheless, both parties came to the table ready to engage in serious, thoughtful, and civil discussion about the core issues raised in Darwin’s Doubt, and we commend Marshall not only for participating, but for focusing his critique of the book on the central scientific issues, something other critics have conspicuously failed to do.

The debate was consequently both constructive and civil. Both parties complimented, as well as critiqued, the work of the other. Marshall, for example, described the first third of Darwin’s Doubt — the section that discusses the Cambrian and Precambrian fossil record, Marshall’s own area of principle expertise — as “good scholarship.” He also said it “looks like good science” and that Meyer “writes well,” and that he (Marshall) “really enjoyed reading”Darwin’s Doubt. Meyer, for his, part expressed his admiration for Marshall’s many scientific papers in paleontology and noted that he had been looking forward to the conversation because he and Marshall clearly “shared a passion for the same subject,” despite their different perspectives. Of course, Marshall is not pro-ID and both men expressed spirited disagreements, but they did so in a mostly respectful way that made the debate all the more interesting and engaging to listen to.

I was very impressed with Dr. Marshall’s performance during the debate, although he did try to poison the well a bit against ID at the beginning, and he got nasty at the end. It’s amazing how Dr. Meyer was able to get him to stop it with the politics and get serious, just by sticking to the science. Even when Marshall got insulting at the end, it was still valuable to see how the other side has to abandon rational argument and scientific evidence once they see that they can’t win on the merits. It’s “Inherit the Wind” in reverse.

Evolution News also posted a more complete guide to the debate in this post, and I recommend that you read that post before listening to the debate if you are not familiar with the science.

This is a great debate, and you definitely ought to listen to it. I hope I’ve posted enough here to convince you. If you haven’t yet bought “Signature in the Cell” and “Darwin’s Doubt“, then I urge you to get them, although they are intermediate/advanced level books. The two books are the state of the art in intelligent design research, good enough to be debated with a University of California, Berkeley professor of biology. Dr. Meyer is the real deal, and if you want to be convincing on these important scientific issues, you need to learn the scientific evidence from his books.

If you are not a regular reader of the Evolution News blog, you really should be. It’s also a good idea to subscribe to the Intelligent Design: The Future podcast.

News

UC Berkeley paleontologist Charles Marshall’s dishonest review of “Darwin’s Doubt”

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There have been a series of Evolution News posts responding to a critical review of Darwin’s Doubt, published in the journal Science. I have been keeping up with them, but when I read this post by Casey Luskin about a challenge from Charles Marshall against Meyer’s book, I really felt that I had to blog about it.

You have to read this to believe it:

In his review of Darwin’s Doubt in the journal Science, UC Berkeley paleontologist Charles Marshall claims that Stephen Meyer “completely omits mention of the Early Cambrian small shelly fossils,” which he claims causes Meyer “to exaggerate the apparent suddenness of the Cambrian explosion.” Yet both of Marshall’s claims are false. Meyer does not fail to mention the small shelly fossils and he does not exaggerate the brevity of the Cambrian explosion.

In the first place, Marshall has his facts wrong. Meyer does discuss the small shelly fossils on page 425 of Darwin’s Doubt. Meyer writes as follows:

The Cambrian period 543 mya is marked by the appearance of small shelly fossils consisting of tubes, cones, and possibly spines and scales of larger animals. These fossils, together with trace fossils, gradually become more abundant and diverse as one moves upward in the earliest Cambrian strata (the Manykaian Stage, 543-530 mya).

Nevertheless, although Meyer discusses the small shelly fossils, he does not treat them as a solution to the problem of the explosion of morphological novelty that arises later in in the Cambrian period. The small shelly fossils appear in the fossil record at the base of the Cambrian period about 542-543 million years ago. The main pulse of morphological innovation that Cambrian paleontologists commonly refer to as the “Cambrian explosion” first begins about 530 million years ago and then lasts about 10 years through the Tommotian and Adtabanian stages of the Cambrian period. During the first 5-6 million year stage (the Tommotian) of the explosion, between 14-16 novel phyla first appear in the fossil record. Without actually asserting that the small shelly fossils somehow explain the subsequent explosion of all these novel forms of animal life (or even that the small shelly fossils represent ancestors to all, or some, of these forms), Marshall faults Meyer for not treating them as part of the Cambrian explosion.

Now from this, you might expect that other biologists who do not believe in intelligent design think two things. One, that these fossils are important to explaining the Cambrian explosion. And two, that these fossils count as part of the Cambrian explosion – extending the period of innovation from 10 million years (at the most!) to 23 million years. In fact, you might expect that Marshall thinks that the small, shelly fossils DO explain the Cambrian explosion, and that the Cambrian explosion DID last 23 million years, and not 10 million.

But you’d be wrong – all of this nonsense about SSF is just a mendacious smokescreen to smear Meyer:

For example, in a 2006 paper in Annual Reviews of Earth and Planetary Sciences, Marshall acknowledges that these fossils are of unclear evolutionary affinities and importance. He calls them “largely problematic fossils” that are “hard to diagnose, even at the phylum level.” Figure 1 of his paper portrays them as apparently disconnected to the later radiation of Cambrian animals. This impression is reinforced in the text of his article where he notes that the small shelly fossils for the most part are “problematic” organisms of unknown classification… 

Marshall himself does not think that the SSF are an explanation for the Cambrian explosion – he only insinuated that in his review in order to smear Meyer.

In fact, other naturalists agree with Meyer (and Marshall!) that these SSFs are not part of the explanation for the explosion in new information:

Other authorities agree that these small shelly fossils [SSFs] are of unclear evolutionary significance and affinity. In his book On the Origin of Phyla, James Valentine argues that the SSFs “are very difficult indeed to interpret.” Valentine’s 2013 book, The Cambrian Explosion, co-written with Douglas Erwin, notes that “many SSFs are still poorly understood.” Simon Conway Morris found them so unimportant that he does not mention them in either of his authoritative books on the Cambrian explosion (Crucible of Creation or Life’s Solution).

Valentine and Conway Morris are two of the top experts on the Cambrian explosion. Neither is a proponent of intelligent design.

But wait! There’s still more dishonesty from Marshall!

Marshall also argues that Meyer is mistating the length of the Cambrian explosion:

But what about the claim that Darwin’s Doubt exaggerated the brevity of the Cambrian explosion? Should Meyer have included the appearance of the early Cambrian small shelly fossils as part of the explosion when he estimated the length of that event? Not according to a very recent paper by Marshall himself. In 2010, Marshall co-wrote with James Valentine in the journal Evolution (emphases added):

By the beginning of the Cambrian Period, near 543 million years ago, a few kinds of “small shelly” fossils are found, <2mm in largest dimension. The small shellys rose to a peak in abundance and diversity during the period from 530 to 520 million years ago, when representatives of living phyla are found among them. During that same period, a chiefly larger-bodied invertebrate fauna of up to a dozen phyla, and including many soft-bodied forms, is also first represented by fossils. This geologically abrupt appearance of fossils representing quite disparate bodyplans of many living metazoan phyla is termed the Cambrian explosion…

Let’s unpack the construction of this paragraph, in which Marshall explains the length of the Cambrian explosion in relation to the small shelly fossils. Starting at the end of the quote, Marshall and Valentine equate “the Cambrian explosion” with the “geologically abrupt appearance of fossils representing quite disparate body plans.” They further identify this period with “that same period” wherein “a chiefly larger-bodied invertebrate fauna of up to a dozen phyla, and including many soft-bodied forms, is also first represented by fossils.” Marshall and Valentine also equate that period of time with “the period from 530 to 520 million years ago” and distinguish it from the earlier time in which the first small shelly fossils arose. Thus, according to Marshall — in a co-authored technical paper written in 2010 — the Cambrian explosion does not begin with the first appearance of the small shelly fossils 543 million years ago, or during the earliest part of the Cambrian period. Rather, he and fellow paleontologist James Valentine affirm that the explosion begins about 530 million years ago and lasted to about 520 million years — a date consistent with what Valentine has written elsewhere, including in his recent book with Erwin that Marshall cites approvingly in his review of Meyer.

Thus, by Marshall’s own admission, (a) the appearance of small shelly fossils around 543 million years ago does not mark the beginning of the Cambrian explosion, and (b) the Cambrian explosion should be dated to 530 to 520 million years when we see the “abrupt appearance” of many disparate body plans, long after the small shellies appear. This means that Marshall has acknowledged in print that the “Cambrian explosion” itself lasted only about 10 million years — just as Meyer affirmed in Darwin’s Doubt. Indeed, Marshall and Valentine affirm that SSFs appear long before the primary explosive radiation of Cambrian animals and they affirm a 10-million year duration for the Cambrian explosion.

So here you have a naturalist who is so desperate to smear a proponent of intelligent design that he has to resort to outright deception – deceptions which he knows are false from his own writings!

This reminds me of how Lawrence Krauss misrepresented that e-mail from Vilenkin during his debate with William Lane Craig. Apparently, naturalists just aren’t bound by the same sense of morality as theists. Should we be surprised that people who repudiate the idea of objective morality would then proceed to act dishonestly like this? In an accidental universe, anything goes – and truth is not as important as getting ahead in your career by any means necessary.

So the take away lesson for the rest of us is this: Sometimes you don’t need to understand all the scientific details exhaustively in order to know what to think about a controversial issue. You just have to spot the liar.

By the way, Dr. Meyer has some comments of his own about these small, shelly fossils in this post.

Mentoring

The long war: a history of the conflict between religion and science

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Let’s start with an example of a famous battle in the long war between science and religion.

Canadian science writer Denyse O’Leary writes about the history of cosmology at Evolution News.

Excerpt:

What help has materialism been in understanding the universe’s beginnings?

Many in cosmology have never made any secret of their dislike of the Big Bang, the generally accepted start to our universe first suggested by Belgian priest Georges Lemaître (1894-1966).

On the face of it, that is odd. The theory accounts well enough for the evidence. Nothing ever completely accounts for all the evidence, of course, because evidence is always changing a bit. But the Big Bang has enabled accurate prediction.

In which case, its hostile reception might surprise you. British astronomer Fred Hoyle (1915-2001) gave the theory its name in one of his papers — as a joke. Another noted astronomer, Arthur Eddington (1882-1944), exclaimed in 1933, “I feel almost an indignation that anyone should believe in it — except myself.” Why? Because “The beginning seems to present insuperable difficulties unless we agree to look on it as frankly supernatural.”

One team of astrophysicists (1973) opined that it “involves a certain metaphysical aspect which may be either appealing or revolting.” Robert Jastrow (1925-2008), head of NASA’s Goddard Institute for Space Studies, initially remarked, “On both scientific and philosophical grounds, the concept of an eternal Universe seems more acceptable than the concept of a transient Universe that springs into being suddenly, and then fades slowly into darkness.” And Templeton Prize winner (2011) Martin Rees recalls his mentor Dennis Sciama’s dogged commitment to an eternal universe, no-Big Bang model:

For him, as for its inventors, it had a deep philosophical appeal — the universe existed, from everlasting to everlasting, in a uniquely self-consistent state. When conflicting evidence emerged, Sciama therefore sought a loophole (even an unlikely seeming one) rather as a defense lawyer clutches at any argument to rebut the prosecution case.

Evidence forced theorists to abandon their preferred eternal-universe model. From the mid 1940s, Hoyle attempted to disprove the theory he named. Until 1964, when his preferred theory, the Steady State, lost an evidence test.

Here is a a quick summary of some of the experimental evidence that emerged in the last few decades that caused naturalists to abandon the eternal universe that they loved so much when they were younger.

The importance of having a narrative

Now I want to make a very, very important point about Christianity and the progress of science. And that point is that it is very important that Christians present the evidence in exactly the way that Denyse presented it in that article – in its historical context, featuring the conflict between naturalists and the experimental evidence.

All Christians should be familiar with the following basic pieces of evidence which fit the war between science and naturalism narrative:

  1. The origin of the universe
  2. The cosmic fine-tuning
  3. The origin of life (biological information)
  4. The sudden origin of the Cambrian phyla
  5. The habitability/observability correlation

When you talk about these evidences as a Christian theist to non-Christians, you have to have cultivated a genuine interest in reconciling your beliefs with science. You have to accept that there are two books that reveal God’s character and attributes. The book of nature, and the book of Scripture. And you need to be flexible about getting these two books to fit together. The book of nature gives us natural theology (see Romans 1). It tells us that God is Creator and Designer. The book of Scripture tells us that God stepped into history as a man to save us by taking the punishment for our headlong rush away from God, which the Bible calls sin. Science is one way that humans can recover some of basic knowledge about God. Knowledge that is only possible because God created and designed the universe (and us) in such a way that we are capable of making discoveries, and that the universe is capable of being explored and understood.

It’s very important to present these five basic evidences to non-Christians in the historical context. And here is the story you must tell: “In the beginning, there was the naturalism, and the naturalism tried to argue from ignorance that God was not Creator and God was not Designer. And then came the science, and now people have to give up their naturalism in order to not be crazy and irrational”. That’s the narrative you use when talking to non-Christians about science.

In the beginning was the naturalism:

  1. In pre-scientific times, atheists maintained that the universe was eternal
  2. In pre-scientific times, atheists maintained that a life-permitting universe was as likely as a life-prohibiting universe
  3. In pre-scientific times, atheists maintained that the cell was a simple blob of jello that could spontaneously emerge in some warm pond
  4. In pre-scientific times, atheists maintained that the sudden origin of the Cambrian phyla would be explained by subsequent fossil discoveries
  5. In pre-scientific times, atheists maintained that there was nothing special about our galaxy, solar system, planet or moon

But then science progressed by doing experiments and making observations:

  1. Scientists discovered redshift and the cosmic microwave background radiation and more!
  2. Scientists discovered the fine-tuning of gravity and of the cosmological constant and more!
  3. Scientists discovered protein sequencing and exposed the myth of “junk DNA” and more!
  4. Scientists discovered an even shorter Cambrian explosion period and the absence of precursor fossils and more!
  5. Scientists discovered galactic habitable zones and circumstellar habitable zones and more!

And now rational people – people who want to have true beliefs about reality – need to abandon a false religion (naturalism).

Now naturally, science is in a state of flux and things change. But you have to look at the trend of discoveries, and those trends are clearly going against naturalism, and in favor of Christian theism. No one is arguing for a deductive proof here, we are simply looking at the evidence we have today and proportioning our belief to the concrete evidence we have today. People who are guided by reason should not seek to construct a worldview by leveraging speculations about future discoveries and mere possibilities. We should instead believe what is more probable than not. That’s what a rational seeker of truth ought to do. Proportion belief to probabilities based on current, concrete knowledge.

It is very important that Christians keep abreast of the progress of science, and give proper respect to science when forming our worldviews, and keep in mind what is really going on with atheism. There is a lot of loud worshiping of science by people like Dawkins and Atkins and Krauss, but if you dig into things a little, you’ll find that they are actually filled with rage and enmity against what science has revealed about nature. And not just in one area, but in many, many areas.

Atheism, as a worldview, is not rooted in an honest assessment about what science tells us about reality. Atheism is rooted in a religion: naturalism. And the troubling thing we learn from looking at the history of science is that this religion of naturalism is insulated from correction from the progress of science. Nothing that science reveals about nature seems to be able to put a dent in the religion of naturalism, at least for most atheists. Their belief in naturalism is so strong that it repels all scientific evidence that falsifies it. Atheists simply don’t let science inform and correct their worldview.

It falls to us Christian theists, then, to hold them accountable for their abuse and misrepresentation of science. And that means telling the story of the progress of science accurately, and accurately calling out the religion of naturalism for what it is – a religion rooted in blind faith and ignorance that has been repeatedly and convincingly falsified by the progress of science in the modern era.

Positive arguments for Christian theism