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How to Clone a Mammoth:
The Science of De-Extinction

Sunday, May 3, 2015 at 2 pm (PST)
Baxter Hall, Caltech

Dr. Beth Shapiro (photo by Kris Krug)

Credit: Kris Krüg

COULD EXTINCT SPECIES, like mammoths and passenger pigeons, be brought back to life? According to evolutionary biologist Beth Shapiro, the science says yes. From deciding which species should be restored, to sequencing their genomes, to anticipating how revived populations might be overseen in the wild, Shapiro vividly explores the extraordinary cutting-edge science that is being used to resurrect the past. Journeying to far-flung Siberian locales in search of ice age bones and delving into her own research and that of others, Shapiro considers de-extinction’s practical benefits and ethical challenges. Would de-extinction change the way we live? Is this really cloning? What are the costs and risks? And what is the ultimate goal?

A book signing will follow the lecture. We will have copies of the book, How to Clone a Mammoth: The Science of De-Extinction, available for purchase. Can’t attend the lecture? Order the book from Amazon.

TICKETS are available first come, first served at the door. Seating is limited. $10 for Skeptics Society members and the JPL/Caltech community, $15 for nonmembers. Your admission fee is a donation that pays for our lecture expenses.

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About this week’s eSkeptic

In this week’s eSkeptic, Glenn Branch reviews Why Science Does Not Disprove God, by Amir D. Aczel. This review was published in Skeptic magazine 20.1 (2015).

Glenn Branch is deputy director of the National Center for Science Education, a non-profit organization that works to defend the teaching of evolution and climate science in public schools.

Proof & God

a book review by Glenn Branch

A statistics professor turned science writer, with a string of popular books on various topics in mathematics, physics, and the history of science to his credit, Amir D. Aczel turns, in Why Science Does Not Disprove God, to the vexed subject of science and religion. Addressing the same general audience, he argues that “modern science has not disproved the existence of God” (p. 4). He makes the stronger and separable claim that “spirituality, religion, and faith have important roles to play in our lives” (p. 5), but he does not argue for it here. His targets, unsurprisingly, are the so-called New Atheists, particularly Richard Dawkins and Lawrence Krauss.

Of the three significant concepts in the book’s title, Aczel concentrates on science. The first six chapters (including a chapter on biblical archaeology, which is not really relevant to his theme) march the reader through the history of science, with occasional swipes at Dawkins and Krauss en route, and the next five chapters directly engage the New Atheist arguments on topics in physics and mathematics. Three chapters discuss evolution, culture, and the infinite, following which the final chapter summarizes the argument. Throughout, however, Aczel fails to interrogate the other two significant concepts of his book’s title—proof and God—and the results are calamitous for his project.

For Aczel, a mathematician by training, proof appears to be the mathematical notion of proof: a deductive argument from unchallenged premises for a necessary conclusion. It is certainly possible to attempt to offer a proof of the non-existence of God: the familiar conundrum “Can God create a rock so big that He can’t lift it?” is a gesture toward doing so. But such a proof, if successful, reveals that the concept of God is inconsistent; science is neither necessary for nor helpful in its construction. Indeed, it is practically a platitude, even for the New Atheists, that science alone is incapable of constructing such a proof that there is no God—so why write a book arguing for the point?

That Aczel is assuming the mathematician’s notion of proof seems evident from his treatment of Dawkins. In The God Delusion (2006), Dawkins describes his atheism as attributing a non-zero probability to the existence of God: “I cannot know for certain but I think God is very improbable, and I live my life on the assumption that he is not there.” Insofar as Dawkins’s atheism depends on empirical claims that cannot be known with certainty, this seems like a reasonable claim. Yet Aczel refuses to acknowledge the possibility of a position such as Dawkins’s, instead asking, “Why does the world’s most prominent atheist suddenly hedge?” (p. 13), and not pausing to look for the answer.

Thus Aczel assumes, far too often, that the incompleteness and fallibility of current scientific knowledge—its incapacity to rise to the level of mathematical proof—provide a refuge for God. With regard to the origin of life, for example, he writes, “the question of a beginning of the process of life through a powerful set of commands, something like a primeval piece of computer code, is unavoidable. How is it possible to prove that no outside force created the code?” (p. 168). Perhaps it isn’t; but so what? Worse, Aczel occasionally infers from the mere fact that a hypothesis is not disprovable that it is scientifically “viable” (p. 168), which is ludicrously indefensible.

What about God? Quoting the literary critic James Wood, Aczel suggests, plausibly, that the New Atheism “often seems engaged only in doing battle with scriptural literalism” (p. 20), a position that he acknowledges is thoroughly debunked: “The discoveries of fossils, evolution, geological time, the rotation of the Earth, and other developments in science showed that Scripture should not be taken literally” (p. 93). It is disturbing, though, that even so he insists that Genesis lists the order in which living things are created in a way that is “not in disagreement with evolution” (p. 93). In fact, the Genesis narrative conflicts not only with evolution but with itself: compare Genesis 1 and Genesis 2.

Commendably unwilling to defend scriptural literalism, Aczel is not willing to specify what it is about God that he wants to defend. At times, it seems only the mere label: of the postulated superforce in which the basic four forces were once unified, he intones, “Some might call it God” (p. 103); of the supposed fine-tuning of the universe, he endorses the idea that “something like a miracle” (p. 180) might have been responsible; of the infinite, he urges, “one could say that [it] belongs to God” (p. 231). Indeed, but what explanation or insight would doing so afford, especially in light of Aczel’s admission that “we do not know what God is” (p. 252)?

Why Science Does Not Disprove God
Order the book from Amazon

Why are theologies that attempt to accommodate modern science not discussed in Why Science Does Not Disprove God? In his introduction, Aczel explains that he is not writing from the perspective of any particular faith and that he is not seeking to defend any particular religious institution. But neither restriction would have prevented him from describing a variety of theological positions. Perhaps as a science writer he was uncomfortable doing so. But in any case, his silence in effect implies that there are only two choices: scientific atheism of the sort that he opposes and etiolated, in-name-only, faith—which surely, by his lights, is a counterproductive result.

The ramifications of Aczel’s not examining the concepts of proof and God are not the only irritations of the book. The treatment of evolution is particularly disappointing. Aczel wrongly identifies only natural selection as a mechanism of evolution, ignoring genetic drift, mutation, migration, and less basic mechanisms such as endosymbiosis. He misleadingly describes both Homo erectus and Australopithecus afarensis as a “missing link” between humans and apes, thus reinforcing a host of common misconceptions about human evolution. And, in a passage that creationists will forever quote without regard to its context, he writes, “The theory of evolution has flaws” (p. 201).

What are the flaws of the theory of evolution, in Aczel’s view? In part that it fails to provide complete explanations of various phenomena: the peacock’s tail, altruism, the origin of life, the emergence of eukaryotic cells, consciousness. In part that it is not quantum mechanics: Aczel devotes a table to the comparison, with evolution stigmatized as insufficiently mathematizable, rigorous, predictive, precise, and accurate. These complaints, however, are in mutual tension if not outright contradictory: after all, even if it is conceded that the evolutionary explanation of the peacock’s tail is not complete, quantum mechanics is hardly going to provide any further insight.

Aczel is not convincing about these flaws in any case. While discussing altruism, the evolutionary topic to which he devotes the most space, he dismisses kin selection by asking, “would people die for a sibling more willingly than for a child? Such ‘genetic’ computations seem questionable” (p. 203). In fact, individuals are on average equally genetically similar to their siblings and to their children, so the relevance of his question is unclear. Aczel argues that cases of altruism with regard to strangers are evolutionarily unexplainable, apparently on the mistaken assumption that the biological infrastructure for altruism is bound to influence behavior directly, unmediated by culture.

On physics and mathematics, Aczel’s critique of the New Atheism is often on point. In chapter 7, he dismisses Krauss’s claim in A Universe from Nothing (2012) that physics explains why there is something rather than nothing by noting that the quantum foam from which the universe sprang in Krauss’s view isn’t nothing. In chapter 11, described as “the book’s most important chapter,” he incisively criticizes the anthropic principle as unexplanatory. Elsewhere, he faults Dawkins for relying on a statistical study of the religious beliefs of a prestigious group of scientists that was conducted by e-mail and received only a 23% response, thus establishing nothing of significance.

But there is often a tinge of legerdemain, especially when Aczel appeals to technicalities to establish philosophical results. In chapter 9, he scolds Dawkins for not assuming that the prior probability of God’s existence is 50 percent. He misreads Dawkins there, but he also fails to note that the principle of indifference he invokes is highly contentious. In chapter 14, he rehearses Russell’s paradox, concluding not only that there is no universal set but also that there are disturbing consequences that “hint at our inherent inability to ever know everything about creation” (p. 227). But he overlooks the set theories, such as Quine’s New Foundations, that have no problem with the existence of a universal set.

Skeptic magazine 20.1 (cover)
Order Skeptic magazine 20.1.

When it comes to the history of science, the narrative approach Aczel employs is useful and appealing, although somewhat hackneyed in its use of familiar episodes and anecdotes (including the story of Euler’s algebraic rebuke to Diderot’s atheism, which is definitely apocryphal). But there is sometimes cause to wonder about the depth of his knowledge of the material. Aczel fails to cite literature that would, if anything, bolster his case, especially when he offhandedly dismisses the Middle Ages as a period in which “there were few attempts to pursue science” (pp. 64–65), suggesting his thoroughgoing ignorance of the work of modern historians of medieval science.

Aczel writes clearly and fluently, and the text is occasionally enlivened by his engaging reports of his interviews with sympathetic contemporary scientists. But the value of his book overall is vitiated by not only his sloppiness with the historical, scientific, and philosophical material but also his uncharitable treatment of his opponents. (The worst example of the latter flaw is the offensively inaccurate observation, “I have never heard of an atheist group volunteering to offer comfort to the ill or the distressed” [p. 205], which is somehow the fault of Daniel Dennett.) Anyone seeking a judicious critique of the New Atheism’s claims about religion and science will be disappointed by Aczel’s book. END



  1. Roy Niles says:

    Shouldn’t the point be that science can’t prove God does exist! Science wasn’t philisophically conceived of and developed to be a system that could prove a negative.
    On the other hand, the philosophy that developed the logic that science uses can prove that a creative God cannot logically exist, so why would science even have to enter the picture where such a mythologically silly hypothesis is cncerned?

  2. John Serventy says:

    References to a peacock’s tail are misleading. The tail of pavo christatus is quite insignificant. More properly described as a train, the fan is formed by the outer wing coverts.

  3. Leo Stummer says:

    If I remember right, this “problem” was sufficiently treated by Russel and his teapot.

  4. John Hodge says:

    This article misinterprets how science works.
    Science doesn’t “prove” anything. It rejects or does not reject a hypothesis.
    This allows all models to be wrong and to be replaced by better models. Newtonian gravity was not rejected by falling apples or the moons orbit. But it has been replace by more accurate model of general relativity.

    There are many different concepts of God. None produce a falsifiable prediction. Therefore, the hypothesis of a God is not even tested, much less not rejected.

  5. Dr. Sidethink says:

    IMO, the best answer is
    “Tell me more about that!!”

    My serious belief is that the Question doesn’t even make sense.
    ( this is could be called the “Positivist copout” and it pisses poeple off to hear that
    you think yhat they must be stupid to have devoted time and energy to bullshit)

    the answer
    “beats me!!,.. How about them Broncs !!?? ( or apropriate substitution )”

    usually works pretty well.

    Dr. S

  6. brad.tittle says:

    There are many words written to describe the non state that an agnostic lives in. I declare myself a 2nd Order Atheist because it lets me deflect the concerted efforts of theists to save me more effectively. Agnostic is a well defined term, but it is no so well defined that a devotee won’t see it as an opening. Aczel asserting that Dawkins is “leaving an opening” is a complete failure on Aczel’s part to comprehend the multiverse. There exist on this plant 7+ Billion universes. Each universe is its own perfect reference frame.


    Aczel accuses Dawkins of hedging, showing that Aczel doesn’t understand. If you ask an astronomer if the world is flat, he may say “It seems improbable.” Aczel’s book looks like a waste of time. ….. For those who didn’t get Stummer’s reference to Russell’s tea pot, Bertrand Russell said, “I can say that a tea pot orbits the sun between Jupiter and Saturn and you can’t disprove it. But what odds would you give for it?”

  8. Thys Human, Pretoria says:

    Does Aczel mention or refer to Victor Stenger’s works? As far as I’m concerned Stenger has used science and mathematics and logic to prove beyond a reasonable doubt that any type of god did not and cannot exist. He even shot William Lane Craig’s arguments of fine tuning to pieces.

    The concept that you cannot prove a negative is old and outdated. It had a “sell by date” long, long ago because as technology and science improved it became absolutely clear that no emanations, radiation, waves, particels or whatever have ever and to date been found which could indicate the existence of such a god or of the supernatural. The lack of any indications, is in itself “proof” of non-existence. After all, nobody disputes that you cannot insist on the existence of the Big Spaghetti Monster just because you cannot “prove” that he doesn’t exist!

    If Aczel did not mention Stenger it can only be because he knows he cannot dispute or attack Stenger’s sound arguments and deductions.

    • Roy Niles says:

      As to the “outdated” concept that you can’t provr a negative, give us an example of a negative that you can prove. Although using the example of “the evidence of absence” is not proof that the absent element does not exist, since of course if it had not existed, it would not have had the need to be considered absent.

  9. jeff aldridge says:

    suppose an alien race literally created the earth and humans, however they did it. does that not make them ‘god’? let’s not confuse ‘god’ with ‘the bible’ or other religious artifacts. you can’t prove something doesn’t exist. in attempting such, you’re assuming a complete and thorough understanding of all things in the universe. look at the dog. he has no concept of time or money in the sense that humans understand it. ask yourself: what’s going on in the universe that makes us the dog, oblivious to what’s happening because we have no capacity to observe or comprehend it? *anything is possible

    • Roy Niles says:

      Our humanly developed logic, the same logic you are trying to use to state that anything is possible, will actually tell us that illogiclly conceived entities are just as likley to be impossible as possible. In other words if it’s logically possible that something is impossible, what was your point?

      • jeff aldridge says:

        you’re making my point for me. *any scenario is possible *or impossible. any conceivable outcome could be reality

        • Roy Niles says:

          “”any scenario is possible” or impossible” was not your statement, and even if it now is, it offers no logical explanation as to how the impossible could be a reality. Or how a statement that any scenario is possible allows for one of them to at the same time be impossible. But if in fact you’re only claimng anything is either possible or impossible, I ask again, what’s your point as it relates to this article?

  10. Richard says:

    Godel’s theorem says that one cannot prove the consistency of any system from within the system (not well paraphrased). This is why science can not prove anything to be true. I know it is deeper than this, but I do not have the resources to write in detail about it.

    The message is: Is God part of the universe or not? If in then inconsistent. If out then similar questions apply to the godiverse. Questions such as where did God come from, are there other Gods that have their own universes to screw up?

    I see that my poor attemts to blend irony with serious thhought are not working, and I cannot see what I am typing anymore because of this silly blue band across the bottome of the page.

  11. JIMJFOX says:

    Why Science Does Not Disprove God–

    Because it doesn’t try to…

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