Complex eyes in the Cambrian

Posted 30 June 2011 by

I got a letter from a creationist today, claiming that "Darwinism is falsified," based on an article in Nature. It's kind of amazing; this article was just published today, and the metaphorical digital ink on it is barely metaphorically dry, and creationists are already busily mangling it.

It's a good article describing some recent fossil discoveries, found in a 515 million year old deposit in South Australia. Matthew Cobb has already summarized the paper, so I'll be brief on the details, but it's very cool. What was found was a collection of arthropod eye impressions, probably from cast-off molts. No sign of the bodies of these animals was found, suggesting that perhaps they were not fully sclerotized, or as the authors suggest, that disarticulated eyes were more prone to rapid phosphatization than eyes attached to a decaying body. There is no evidence of biomineralization, so these were animals with a very light armor of chitin alone.

What's wonderful about the eyes is that they are relatively large and contain numerous ommatidia, the individual facets of a compound eye. They have over 3,000 lenses, and there's also evidence of regional specialization in the eye. These were highly visual animals that were capable of forming a good image of the world around them.

complexeyes.jpeg
Complex arthropod eyes from the Early Cambrian. a-d, Three fossils of compound eyes from a large arthropod from the Emu Bay Shale, South Australia (a-c), shown in similar hypothesized orientation to the compound eye of a living predatory arthropod, the robberfly Laphria rufifemorata (d; anterior view of head). All fossil eyes have large central ommatidial lenses forming a light-sensitive bright zone, b, and a sclerotized pedestal, p. Because the fossil eyes are largely symmetrical about the horizontal axis, it is not possible to determine dorsal and ventral surfaces, and thus whether the eyes are left or right. All fossils are oriented as if they are left eyes (medial is to the left of the figure). In b there is a radial tear (white line) with the top portion of the eye displaced downwards to overlie the main part; extensive wrinkling causes some central lenses (arrow) to be preserved almost perpendicular to the bedding plane.

These eyes are also from the early Cambrian, so they appeared in the early stages of large animal evolution. The closest thing to them in ommatidial number are the sophisticated eyes of many trilobites, but even there, these eyes were early and relatively large.

ommatidianumbers.jpeg
Complexity of the Early Cambrian Emu Bay Shale eyes compared to eyes in other early Palaeozoic taxa. a, b, Number of ommatidia (a) and lens size (b) plotted against stratigraphic age for Cambro-Ordovician arthropods. The Emu Bay Shale eyes have many more ommatidia and much larger individual ommatidia than eyes in all other Cambrian taxa. Trilobites are plotted according to eye type: schizochroal eyes have relatively few, large lenses and are optically unusual compared to typical compound eyes.

Where in this is the refutation of evolution? I don't know. But I did receive a letter from that Canadian idiot, David Buckna, crowing about it, and linking to his very silly creationist article describing it, in which you'll find the abstract for the paper with curious random spastic boldfacing added which supposedly highlight the parts of the story that contradict evolutionary theory, words like "complexity" and "Cambrian explosion" and "more complex" and "great evolutionary event". It's a bit bizarre and like looking at the obsessive activity of a squirrel gathering nuts.

Here's the creationist summary of the paper, however.

The Cambrian explosion is affirmed; complexity appears suddenly without transitions; Darwinism is falsified; the inference to the best explanation is intelligent design. Let the world know.

Let's deal with each of these claims one by one.

  1. The "Cambrian explosion" is a term coined by scientists to describe the rapid (in geological terms) appearance of large, complex animals with hard skeletons over the course of a few million years roughly half a billion years ago. There is no creationist gotcha in pointing out the existence of this geological period; scientists have written whole books on the subject.

  2. The sudden appearance of complexity is no surprise, either. We know that the fundamental mechanisms of eye function evolved long before the Cambrian, from the molecular evidence; what happened here was not that, poof, eyes instantly evolved, but that the evolution of body armor gradually increased from the pre-Cambrian through the Cambrian, making the organization of eyes visible in the fossil record.

    It is also the case that the measure of complexity here is determined by a simple meristic trait, the number of ommatidia. This is not radical. The hard part in the evolution of the compound eye was the development of the signal transduction mechanism, followed by the developmental rules that governed the formation of a regular, repeating structure of the eye. The number of ommatidia is a reflection of the degree of commitment of tissues in the head to eye formation, and is a quantitative difference, not a qualitative one.

    And finally, there's nothing in the data from this paper that implies sudden origins; there can't be. If it takes a few hundred thousand years for a complex eye to evolve from a simple light sensing organ, there is no way to determine that one sample of a set of fossils was the product of millions of years of evolution, or one day of magical creation. It's a logical error and a failure of the imagination to assume that these descriptions are of a population that spontaneously emerged nearly-instantaneously.

  3. "Darwinism" is not falsified. Darwin himself explained in great detail how one should not expect fine-grained fossil series, due to the imperfection of the geological record. Creatonists, read chapter 9 of the Origin; here's a brief excerpt.

    It should not be forgotten, that at the present day, with perfect specimens for examination, two forms can seldom be connected by intermediate varieties and thus proved to be the same species, until many specimens have been collected from many places; and in the case of fossil species this could rarely be effected by palaeontologists. We shall, perhaps, best perceive the improbability of our being enabled to connect species by numerous, fine, intermediate, fossil links, by asking ourselves whether, for instance, geologists at some future period will be able to prove, that our different breeds of cattle, sheep, horses, and dogs have descended from a single stock or from several aboriginal stocks; or, again, whether certain sea-shells inhabiting the shores of North America, which are ranked by some conchologists as distinct species from their European representatives, and by other conchologists as only varieties, are really varieties or are, as it is called, specifically distinct. This could be effected only by the future geologist discovering in a fossil state numerous intermediate gradations; and such success seems to me improbable in the highest degree.

    Finding a fossil eye with numerous ommatidia a hundred million years after molecular biology tells us that eyes evolved does not in any way falsify the idea of a gradual evolution of the eye.

  4. Given that there is nothing in this story that contradicts the idea of a natural process generating increasing complexity over time, and given that it's an observation that fits perfectly comfortably within the body of evolutionary theory, there is no reason to leap the utterly unfounded conclusion that an invisible spirit zapped these fossils into existence — an invisible spirit for which there is no evidence. Furthermore, what evidence is in this paper directly contradicts Buckna's beliefs: he is a young earth creationist, and this is a paper describing organisms that lived 515 million years ago. If you look at the chart I reproduced above, you might also notice that the pattern of complexity (ommatidial numbers) in trilobites shows a trend of increase over 80 million years.

  5. I shall gladly let the world know that David Buckna is an irrational fool who doesn't know how to read a scientific paper and makes illogical leaps in his arguments.


Lee MSY, Jago JB, García-Bellido DC, Edgecombe GD, Gehling JG Paterson JR (2011) Modern optics in exceptionally preserved eyes of Early Cambrian arthropods from Australia. Nature 474: 631-634.

98 Comments

DS · 30 June 2011

The second law of creationist dynamics:

Any real discovery that conforms to modern evolutionary theory automatically disproves Darwinism.

TomS · 30 June 2011

I've always found it interesting that creationists can read enough of the literature to quote mine, without noticing what the literature is saying. I guess that they learn that skill by reading the Bible.

mrg · 30 June 2011

They have no capability of comprehension and no interest in comprehension. It's an associative scheme: they scan through an article to spot "hot button" verbiage that they use to index into their cardfile of stock arguments.
The appropriate arguments are assembled into a "rebuttal". It wouldn't be hard to write a computer program to implement this algorithm.

It is possible, though I wouldn't judge it likely, that somebody already has, and we are seeing the results.

Mike Elzinga · 30 June 2011

There is a lot about ID/creationist repetitiveness and fantasy that reminds me of perseveration and confabulation.

And, after decades of the same refuted ID/creationist crap being pounded down by the science community and the courts, AiG keeps recycling crap here, and here.

AiG, the ICR, and the DI are continuously and breathlessly keeping their rubes “up to date” on how to interpret the latest research coming out of the scientific community by publication highjacking legitimate work and making it appear that ID/creationist exegesis is the proper way to understand science.

Then we see our copy/paste, FL/IBIG trolls engaging in these same mechanical and repetitive behaviors. So the ID/creationist tactics have certainly worked in turning these trolls into automatons.

If it were a Bugs Bunny Road Runner cartoon, it would be funny.

But the “Church of Confabulatory Perseveration” is just plain sick.

https://me.yahoo.com/a/JxVN0eQFqtmgoY7wC1cZM44ET_iAanxHQmLgYgX_Zhn8#57cad · 30 June 2011

I think this is worth a cross-post from Pharyngula:
Oh please, all eyes are apparently related, and thus would have to have a common ancestor that existed well before the Cambrian "explosion." So why wouldn't complex eyes exist at the start of the Cambrian? It's just the same old boring "Cambrian explosion = God Designer." The Cambrian was an amazing radiation produced when spiking oxygen levels allowed animals to become dramatically larger and to otherwise evolve to fit niches. Plants were nowhere to be seen, and land animals were absent, or, at best, small and unimpressive. Eden makes sense as design. Prokaryotes for at least a billion years, then Eukaryotes for another billion or so prior to multicellular animals, then the Ediacaran radiation which largely died out (why, Designer?) and a few other feints, and then finally the Cambrian "explosion" where a huge number of phyla are first visible--a number to become extinct relatively soon (why, Designer?)--is not design, at least none that we know. It's an interesting (not expected--but could we expect evolution to follow our meager knowledge?) spike within a generally expected evolutionary progression.
Glen Davidson

ogremk5 · 30 June 2011

What's fascinating is that their version flies in the face of all sciences (including that which they use to share their 'message' on the internet).

They haven't figured out that simple systems can give rise to insanely complex products in a very short period of time. Using computers we can do in hours what it takes a team of trained engineers a week to do. But even before that, we could watch complex systems emerge from simple behaviors in real time.

They just can't accept that non-designed complexity exists.

SonOfHastur · 30 June 2011

I've always found the obsession with increasing complexiy interesting. A lot of things actually decrease in complexity as evolution occurs. After all, you start with a crude system that kind of does the job, then work toward a system that does the job well. Increasing efficiency often means decreasing complexity as uneeded steps/parts are worked out of the method.

goliardo · 30 June 2011

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mrg · 30 June 2011

goliardo said: How can you quote Darwin for anything???? Darwin was not a scientist!!! If you don't believe me, you can read his books, that there are on-line:
Exactly how does the fact that Darwin was a fairly ordinary Victorian male chauvinist affect the validity of his research? Any more than the validity of Ben Franklin's electrical research -- and he was a world-famous scientist for his era -- would be changed by the fact that he owned slaves? (As, incidentally, did many of America's Founding Fathers, including George Washington and Thomas Jefferson.) Please, if you want to show that Darwin was wrong in his scientific insights -- and he is known to have been wrong in a number of cases -- such "ad hominem" attacks miss the target. You need something better. One suspects you use the ad hominems because you don't have anything better.

DS · 30 June 2011

Darwin was wrong about lots of things. That doesn't mean that he wasn't a scientist. It also doesn't mean that he was wrong about everything. That criteria only applies to those who claim to be omnipotent, not scientists.

harold · 30 June 2011

Technically, those ancient arthropod eyes were more advanced than the eyes of modern creationists, since ancient arthropods could perceive something related to reality.

Paul Burnett · 30 June 2011

goliardo said: How can you quote Darwin for anything???? Darwin was not a scientist!!!
Neither are you. And Darwin's been dead for over a century - things were different then. You worshippers of willful ignorance and scientific illiteracy should realize that the world has moved on since Darwin...even if creationists haven't.

Atheistoclast · 30 June 2011

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Frank J · 30 June 2011

DS said: The second law of creationist dynamics: Any real discovery that conforms to modern evolutionary theory automatically disproves Darwinism.
Look at it this way. If you have ever collected data points and calculated a best-fit line you'll know what I mean. Note that none of the points fall exactly on the line, so with each new data point you show everyone how far it is from the line. Thus each point "falsifes" the line, and the more points the better. If your audience is gullible enough, you can even forget about all the previous points that were claimed to "falsify" the line, and pretend that this one is the "smoking gun." If they don't buy it, just pick another point that's further from the line. Keep going until they give up. But never, ever mention how the points converge on the line, or that the convergence was neither sought nor fabricated. If you're really good at it, you will know not to mention that others tried to force-fit the data into other, mutually contradictory lines.

Shebardigan · 30 June 2011

Given that Columbus at his death still erroneously believed that he had reached India, it is reasonable to conclude that his discovery, the American continent, does not exist.

harold · 30 June 2011

Bozorgmehr -
DNA does not encode such intricate morphological structures
This is an easily testable assertion. If it's true, then no mutation can disrupt the morphology of a compound eye. Do you make that prediction - that no mutation can disrupt the morphology of a compound eye? Or do you withdraw the assertion which leads to this obvious prediction?

robert van bakel · 30 June 2011

Atheistoclast: thanks for attempting science, pitty about the unsubstantiated faith claim at the end:

'and I have a pretty good idea about who or what that something is!'

'Pretty good idea'? Not bad, but then you're up against science which, 'knows!' Keep the the faith bandwagon rolling, and try not to trip up into too many manglings of your meaning. I mean, really, you don't, 'KNOW!' I do, and I have no need for recourse to a god constantly checking to see if I washed my hands after visiting the shitter.

Paul Burnett · 30 June 2011

Atheistoclast said: Something else is responsible for (intricate morphological structures) - and I have a pretty good idea who or what that something is!
And exactly what peer-reviewed science is that "idea" based on? What proof do you have that supports your "idea"? Or is it based on faith - belief without proof?

DS · 30 June 2011

Don't tell me, it's the magic invisible hologram hypothesis, right? Or maybe the photons that are warped in the magnetic field of the earth, yea that's it. Why don't you google eyeless fruit flies and tell us all again how DNA has nothing to do with eyes and morphology.

Henry J · 30 June 2011

Given that Columbus at his death still erroneously believed that he had reached India, it is reasonable to conclude that his discovery, the American continent, does not exist.

I guess in that case, corn and potatoes don't exist, either. Or llamas.

Shebardigan · 30 June 2011

Henry J said:

Given that Columbus at his death still erroneously believed that he had reached India, it is reasonable to conclude that his discovery, the American continent, does not exist.

I guess in that case, corn and potatoes don't exist, either. Or llamas.
Absolutely. Remember, it's not what you discover that matters, it's what you believe.

snaxalotl · 30 June 2011

nilsson & pelger showed that a patch of useful light-detecting cells is unstable - a depression produces a runaway process of deeper depression, and a lens structure that enhances the directional selectivity of the pit. it seems to me that a bulge will lead to more bulging and compound lenses for exactly the same reason. has anyone done similar calculations for this convex case?

Louis · 30 June 2011

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robert van bakel · 30 June 2011

Louis! Eh?

circleh · 30 June 2011

What kind of an idiot makes an argument like THIS?!
goliardo said: You said in point nr 3: "Darwin himself explained in great detail... " How can you quote Darwin for anything???? Darwin was not a scientist!!! If you don't believe me, you can read his books, that there are on-line: [Various quotes from the works of Charles Darwin referring to his sexist beliefs.]
Scientists are not infallible like prophets claim to be. Thus, we need not assume that because Darwin said something that turned out to be false and/or offensive that we can simply whitewash the error or the offense like religious bigots do their scriptures. And for the record: We are NOT "Darwinists" and haven't been for at least a century now. We are simply students or experts of biology, a branch of science, that, like all others, advances constantly and leaves behind ideas that prove unworkable or false, no matter who they come from. Thus, science is by nature self-correcting in a way religion seldom ever is.
Atheistoclast said: I will restate my belief that DNA does not encode such intricate morphological structures. You can rant on all you like about transcription factors and promoters but these just affect protein expression and regulation.Something else is responsible for this - and I have a pretty good idea who or what that something is!
You can take your entirely pointless "belief" and shove it back up your @$$, you liar.

https://me.yahoo.com/a/eITV6bEl1IqRjWoNfe8SVwtpJ4A8tajdeG.4rplXm9lmng--#2454e · 30 June 2011

If God really is responsible for this super duper eye, it was kinda mean of him not to give it to the other arthropods.

fnxtr · 1 July 2011

I don't think that's our Louis, rvb

Roger · 1 July 2011

Atheistoclast said: The real issue for both creationist and evolutionist alike is explaining how such complex compound eyes with their thousands of lenses, each representing a pixel of vision, could have arisen through changes in DNA. Both would assume this to be the case. The creationist believes it is God's work whereas the evolutionist prefers natural selection instead. But both are mistaken. I will restate my belief that DNA does not encode such intricate morphological structures. You can rant on all you like about transcription factors and promoters but these just affect protein expression and regulation.Something else is responsible for this - and I have a pretty good idea who or what that something is!
So if it wasn't natural selection and it wasn't God, who could possibly be manufacturing and sticking eyes on all the flies because that bit of their DNA is missing? No wait - don't tell me! It's Dr Dolittle, right?

Dave Luckett · 1 July 2011

You gotta hand it to the crackpots. I'd never come up with something more likely to make people fall about laughing than: "Then, all of these fragments compose a nebula of dirty."

A nebula of dirty what? Ice? Dust? Books? DVDs? The mind boggles.

Regrettably, the next sentence "Any nebula is a rotating structure" illustrates the other less-amusing aspect of crackpottery: its invincibly confident assertion of falsehood.

The Founding Mothers · 1 July 2011

I dunno - I kinda like "Nebula of Dirty". I plan to use it for my mid-life-crisis rock band name.

Atheistoclast · 1 July 2011

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Atheistoclast · 1 July 2011

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Atheistoclast · 1 July 2011

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Roger · 1 July 2011

Atheistoclast said:
Roger said: So if it wasn't natural selection and it wasn't God, who could possibly be manufacturing and sticking eyes on all the flies because that bit of their DNA is missing? No wait - don't tell me! It's Dr Dolittle, right?
NISUS FORMATIVUS Chuck Darwin used the term to describe the "coordinating power of the organization". http://players.readbooks.mobi/ReadBooksPreviews/freepreviews/0001000002872/www.gutenberg.org@dirs@etext01@2vapd10-3.html It is better known as the VITAL FORCE.....NWYRFE/NEART in druid talk.
OK, I'll look into VF - I'm off now to buy a crystal ball to get into contact with the druids of the early Cambrian so they can tell me all about it presuming they are not too busy hugging the ancestors of trees. I'll let you know how I got on after the weekend. Bye for now.

Atheistoclast · 1 July 2011

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DS · 1 July 2011

Oh look, the dude can quote mine. Nice try atheist. Unless you can prove that developmental genetics is not sufficient to control development, complete with a testable explanation and evidence published in a peer reviewed journal, you got nothin. Of course, if you could do this, every real scientist would be more than happy to be convinced by the evidence. Probably get you a nobel prize or somethin. Still wouldn't mean goddidit or anything supernatural at all. Still wouldn't mean that evolution isn't real or that common descent isn't real. So come on dude, don't keep us in suspenders. You got anything except incredulity like all the other whackos out there? If not, I got some real good papers for ya to read. They demonstrate that we now have a very detailed understanding of developmental genetics of compound eyes and how they evolved. But of course you don't have to bother to read all them papers if you just claim not to believe it, right. You can just go merrily on your way denying reality with your thumbs stuck in your ears and your hands over your eyes. Man, you must be some kind of contortionist.

TomS · 1 July 2011

Atheistoclast · 1 July 2011

DS said: Oh look, the dude can quote mine. Nice try atheist. Unless you can prove that developmental genetics is not sufficient to control development, complete with a testable explanation and evidence published in a peer reviewed journal, you got nothin. Of course, if you could do this, every real scientist would be more than happy to be convinced by the evidence. Probably get you a nobel prize or somethin. Still wouldn't mean goddidit or anything supernatural at all. Still wouldn't mean that evolution isn't real or that common descent isn't real. So come on dude, don't keep us in suspenders. You got anything except incredulity like all the other whackos out there? If not, I got some real good papers for ya to read. They demonstrate that we now have a very detailed understanding of developmental genetics of compound eyes and how they evolved. But of course you don't have to bother to read all them papers if you just claim not to believe it, right. You can just go merrily on your way denying reality with your thumbs stuck in your ears and your hands over your eyes. Man, you must be some kind of contortionist.
Its "Clast", actually. The *FACT* is that genes are just a parts list. DNA is just a building block. You lot suppose that a house is reducible to the bricks used in its construction - no mention about the plan of the building or anything. The FORM of an object and the SUBSTANCE of an object are two separate things entirely. You can make a ball out of plastic or out of leather. But it its shape and form is independent of the material it is made of. I *predict* that the field of evo-devo will collapse within the next ten years because there is no materialistic explanation for the origins of biological form. [Bozorgmehr is a flaming crank who will be routinely tossed to the bathroom wall as I spot him, but I leave this one intact simply because he's pinned himself to a specific prediction. And, like all other creationist predictions, it will be wrong. --pz myers.]

Atheistoclast · 1 July 2011

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terenzioiltroll · 1 July 2011

Atheistoclast said: They don't specify how a complex structure is built and takes shape, only what goes into it. [...] Even if you knock out just one transcription factor, |Pitx3, you will prevent lens formation because this protein switches on other proteins that are used in the lens by binding to their promoter regions.
(enphasis added) Am I the only one that finds those two excerpts contradictory? I guess that your remark ("DNA does not encode such intricate morphological structures") applies to whole body plans as well and is not restricted to mere parts of those bodies such as eyes, does it not? May I ask what you think of a post appeared here on PT more or less an year ago? Precisely, this one. More broadly, to specify what genes get expressed, when and where sounds very much like specifying how a complex structure is built and takes shape, to me at least. BTW, I used to comment under the nick "Terenzio the Troll": now, it appears that, no matter what I place in my Google profile, PT only takes a part of the email adress as the nickname. Is there a way to change that (from the user side)?

Atheistoclast · 1 July 2011

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mrg · 1 July 2011

terenzioiltroll said: Am I the only one that finds those two excerpts contradictory?
Why do you even read him? I can't stand to. It's nonsense doubletalk from an unbalanced individual at a level of shrill approaching ultrasonic.

Atheistoclast · 1 July 2011

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terenzioiltroll · 1 July 2011

Atheistoclast said: But, as more genomes are sequenced and analyzed over the next decade, it will become manifestly clear that the genome is a not a repository of morphological information. Sorry.
Well, from the very "Wired" post you quote(mine)d earlier: “It is not currently possible to compute an organism from its genome,” he wrote, but the modENCODE work will “bring this goal closer.” It seems that your sources disprove your thesis. I think you are using the words "DNA", "gene" and "genome" interchangeably, while they are not synonyms at all. Besides, we already know for sure that the genome darn well IS a repository of (at least some) morphological information.

terenzioiltroll · 1 July 2011

mrg said: Why do you even read him?
It has to do with my name. Sort of reverse trolling.

Atheistoclast · 1 July 2011

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harold · 1 July 2011

terenzioiltroll said:
Atheistoclast said: But, as more genomes are sequenced and analyzed over the next decade, it will become manifestly clear that the genome is a not a repository of morphological information. Sorry.
Well, from the very "Wired" post you quote(mine)d earlier: “It is not currently possible to compute an organism from its genome,” he wrote, but the modENCODE work will “bring this goal closer.” It seems that your sources disprove your thesis. I think you are using the words "DNA", "gene" and "genome" interchangeably, while they are not synonyms at all. Besides, we already know for sure that the genome darn well IS a repository of (at least some) morphological information.
Non-magical epigenetic factors also play a role in development, although exactly where the "genetic" begins and the "epigenetic" ends is at times semantic. However, the idea that the genome has nothing to do with regulation of gene expression is nonsensical. Joseph "Atheistoclast" Bozorgmehr is trying very, very hard to create a gap to fit magic into.

Atheistoclast · 1 July 2011

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DS · 1 July 2011

Atheist,

Three things are necessary in order for development to produce the structures in a body:

1) Cells must divide in the proper place at the proper time

2) Cells must stop dividing in the proper place at the proper time

3) Cells must differentiate in the proper place at the proper time

This is all that is required in order to make any structure in the body.

Now, pay close attention. Exactly which of these processes is it that you believe cannot be controlled by cascades of gene expression? Exactly why do you think that fine tuned control over gene expression in every cell in the body isn't sufficient to produce structures? Exactly why can't you understand that DNA encodes not only the structural components of the body but also the instructions for their assembly? Exactly what more do you think is required? Exactly what is this other mysterious thing that you think is necessary? Exactly how is this mysterious factor inherited? Exactly how does this mean that evolution cannot happen? Exactly why should anyone take your incredulity seriously?

I can provide references about the genes involved in the development of compound eyes in insects. These references not only detail how the structures are formed, but how the regulatory mechanisms have changed over time in various lineages. Are you at all familiar with the literature in this field? Do you really think that evo-devo and "darwinism" are going to collapse? Or maybe you are just blowing smoke.

I would be happy to discuss these issues on the bathroom wall. This is not the appropriate place for such a discussion. We are discussing fossil eyes here, not your delusional fantasies about development.

fnxtr · 1 July 2011

Protiens aren't just bricks and girders. You know that, Joseph. They have specific shapes, specific behaviours, specific binding sites. Stop being obtuse, Joseph, you're starting to sound like Robert Byers. You're not 'clasting' anyone or anything except your own credibility.

Atheistoclast · 1 July 2011

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John · 1 July 2011

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terenzioiltroll · 1 July 2011

Atheistoclast said: These proteins do not have the inherent ability to interact with each other and self-assemble to form features of exquisite complexity and operation such as the eye. At the end of the day, proteins are remarkable only for their binding capability.
You amaze me: in almost every one of your comments, you boldly assert a proposition and its negation, sometimes on the very same line.
Also, there is simply not enough genetic differences between us and pigs, for example, to account for our major anatomical and behavioral differences. What differences that do exist do not have any significant impact on the gene product.
Any evidence to back up this statement?

harold · 1 July 2011

Atheistoclast -

Is there any evidence that would convince you that morphologic development can be explained without reference to a "designer"? If so, what evidence would suffice?

DS · 1 July 2011

Joe,

You are sadly mistaken. Proteins are indeed capable of interacting to form highly complex structures. And controlling exactly when and where specific proteins are produced and how they interact is indeed the secret to forming those structures. Everyone knows you don't believe it, but no one cares. You have not proposed any testable alternative. You have not even shown any evidence of being at all familiar with the available literature. In short, you got nothin except worthless incredulity dude. But thanks for at least admitting that you can extend our ignorance. That is apparently your only goal.

One more time, just to be fair. DNA not only contains the instructions on how to make the components of life, it also contains the instructions on how to assemble those components. Nothing else is required. Nothing else is observed. God might watch every sparrow fall (so what, they still fall), but god does not have to personally construct every anal sphincter. She's much too busy for that.

And I noticed you ducked my questions. Why is that Joe? If you want to answer, please do so on the bathroom wall. If you don't want to answer the questions, I'm done with you.

Atheistoclast · 1 July 2011

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Atheistoclast · 1 July 2011

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Atheistoclast · 1 July 2011

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Giovanni · 2 July 2011

Di fronte alle foto degli occhi degli insetti formati da migliaia di omatidi che convergono nel cervello debbo dire che non c'è stata evoluzione ,ma non sono creazionista vecchia maniera.Vorrei una spiegazione moderna adatta ai nostri giorni.L'800 è passato e ora la genetica parla con più serietà.L'occhio composto del Riccio di Mare è un grande occhio composito di 2000 pedicelli e 200.000 cellule visive.E' un capolavoro di ingegneria ,bisogna che per forza qualcuno l'ha creato.

Henry J · 2 July 2011

Well, I think I understood the 2000 and the 200.000, except for not knowing what was being measured or in what units...

Shebardigan · 2 July 2011

Giovanni said: E' un capolavoro di ingegneria, bisogna che per forza qualcuno l'ha creato.
Non sequitur. I fatti non supportano questa conclusione.

Ron Okimoto · 3 July 2011

Buckna should fund the Biologic Institute to set up sealed tanks of sterile air and watch for creation events in real-time. Probably the most effective use of their time and money. They seem to be going backwards doing what they are currently doing. Scientific creationism spawned intelligent design, and intelligent design just turned into a bunch of guys running the bait and switch scam on their own creationist support base. All anyone has ever gotten out of the ID perps is a switch scam that can't even mention that ID ever existed. Pretty much nothing else that they are doing is going to get them anywhere, so why not try to capture creation events? It has to be better than spending your time running bogus scams on your own creationist support base.

John · 3 July 2011

Buckna and other demented creobots have seen observations like these from professional paleontologists like Don Prothero, but refuse to listen:

"Bear this in mind: NONE of these people are trained in paleontology, or can tell one fossil from another; NONE of them has done real peer-reviewed research in this area, and most have not even visited the critical outcrops or collected the fossils in question. They just cherry-pick outdated ideas and quote out of context, completely falsifying the actual record. Any any REAL paleontologist knows, there is NO 'Cambrian explosion' but rather a Cambrian 'slow fuse' (see Prothero, 2007, Evolution: what the fossils say and why it matters), with the earliest evidence of animals from the Doushantuo fauna 600 m.y. old, then the multicellular but soft bodied Ediacara fauna (580-540 m.y. ago), and the earliest Cambrian 'little shellies', small skeletonized fossils of mollusks, sponges, echinoderms, and most other invertebrate phyla at 550 m.y. Only at the third stage of the Cambrian, the Atdabanian, do we get larger shelled invertebrates like trilobites, at 520 m.y. ago, some 80 m.y. after the process began. Hardly an 'explosion'!"

This is from Don's review of some cinematic creationist bulls**t posted here at Amazon:

http://www.amazon.com/review/R26VLR8AEX3RSF

terenzioiltroll · 3 July 2011

Giovanni said: Di fronte alle foto degli occhi degli insetti [...]
I was wondering how many other commenters could actually read Italian... Let me summarize the previous comment, for sake of "interoperability": "So complex, it must have been created!"

mrg · 3 July 2011

terenzioiltroll said: I was wondering how many other commenters could actually read Italian...
Run it through BabelFish, I could figure out what it said: STANDARD CREATIONIST SONG-AND-DANCE. What's the Italian equivalent of "song-and-dance"?

terenzioiltroll · 3 July 2011

mrg said: What's the Italian equivalent of "song-and-dance"?
"La solita vecchia solfa".

Robert Byers · 6 July 2011

All I can add to this is that a common designer means a common blueprint to sight. No evolution from primitive to complex and no species of eye types. Rather there is just one law or equation to the seeing thing.
The different types of eyes are just the single law broken up into its parts.
i do think the thing creationists should aim at here is that there is no need nor did it happen to see a evolution from simple to complex in eyes.
All eyes are simply doing the same thing. The rest is minor details.
I think creationism can be a better guide to healing eyesight.
I have a interest in.

Dave Luckett · 6 July 2011

Back to form, Byers. A 3.5 for incoherence, 4 for fatuousness ("all eyes are simply doing the same thing") and an extra point for the terminal non-sentence - truly inspired. I make it a 8.5.

TomS · 6 July 2011

Creationists seem to miss the point that it isn't that various living things are similar, but that there is a pattern of similarities and differences, things more or less similar to one another in a nested hierarchy known as the "tree of life".

Vertebrate eyes tend to be all rather like one another, and insect eyes tend to be rather like one another. The human body is most similar (in many different ways) to the bodies of chimps and other apes, among all of living things; and those bodies are all somewhat less similar to the bodies of other primates; and so on to lesser degrees, to other mammals, other vertebrates, other animals, etc.

It is not easy to ascribe this complex pattern to one "blueprint", or to one "designer", or one "function", "purpose", "raw material", ... one anything.

To the best of my knowledge, there has never been a suggestion which accounts for this pattern which does not involve "common descent with modification" (that is, evolution). There are various ways of accounting for evolution: inheritance of acquired traits, divine guidance, chance, upward drive, selection, entropy, elan vital, symbiosis, quinaries, omega point; but no one has thought of doing without evolution in explaining the "tree of life". And people have decided that they don't need to explain the tree of life. But to account for the pattern without evolution?

terenzioiltroll · 6 July 2011

Robert Byers said: All I can add to this is that a common designer means a common blueprint to sight. No evolution from primitive to complex and no species of eye types. Rather there is just one law or equation to the seeing thing. The different types of eyes are just the single law broken up into its parts. i do think the thing creationists should aim at here is that there is no need nor did it happen to see a evolution from simple to complex in eyes. All eyes are simply doing the same thing. The rest is minor details. I think creationism can be a better guide to healing eyesight. I have a interest in.
So, let me see (pun intended): according to your proposed model, why there is no vertebrate with composite eyes (like "The Fly", for instance)? Why there are no vertebrate eyes in the early Cambrian? Where do cephalopods drop in into the schema? More broadly, why bats have hairs and not feathers, why penguins have feathers and not scales, why there are no vertebrate exapods (Angels don't count)?

Henry J · 6 July 2011

why there are no vertebrate exapods

Like centaurs?

John · 6 July 2011

Dave Luckett said: Back to form, Byers. A 3.5 for incoherence, 4 for fatuousness ("all eyes are simply doing the same thing") and an extra point for the terminal non-sentence - truly inspired. I make it a 8.5.
You're being too generous Dave. I'd give Byers a 5 for incoherence, 0.5 for fatuousness and no extra points, period. I make it a 5.5. Clearly he's done better as a PT creobot lurker IMHO.

Robert Byers · 7 July 2011

TomS said: Creationists seem to miss the point that it isn't that various living things are similar, but that there is a pattern of similarities and differences, things more or less similar to one another in a nested hierarchy known as the "tree of life". Vertebrate eyes tend to be all rather like one another, and insect eyes tend to be rather like one another. The human body is most similar (in many different ways) to the bodies of chimps and other apes, among all of living things; and those bodies are all somewhat less similar to the bodies of other primates; and so on to lesser degrees, to other mammals, other vertebrates, other animals, etc. It is not easy to ascribe this complex pattern to one "blueprint", or to one "designer", or one "function", "purpose", "raw material", ... one anything. To the best of my knowledge, there has never been a suggestion which accounts for this pattern which does not involve "common descent with modification" (that is, evolution). There are various ways of accounting for evolution: inheritance of acquired traits, divine guidance, chance, upward drive, selection, entropy, elan vital, symbiosis, quinaries, omega point; but no one has thought of doing without evolution in explaining the "tree of life". And people have decided that they don't need to explain the tree of life. But to account for the pattern without evolution?
ccdhqh There is a suggestion from Yec and even iD folks. Common blueprint for biology on major points from a designer. Always it was noted everyone had eyes, ears, butt, legs, and the insides all were alike and in the same places. It always made sense there was a single basic plan. I don't think anyone ever said God made each kind so different in these points. Why would a creationist not want a common design? it suggests a designer. Its logical. Therefore eyes make the case. Insects simply have different eyes because of some great need for a difference. The rest can have the usual way. yet still the actual law or equation for sight is the same. these divisions do not reflect evolution or happenchance over millions of years but show a very limited list of options. In fact its only because of the unique nature of insects etc that they don't have eyes like us. I understand octopus have eyes like us. Yet not because of evolutions hand. In fact once again the eyes put evolution in a unlikely light. I think theres room for research of the whole idea of sight. I understand eyes have been investigated but I suspect there is a deeper equation to sight that these divisions of eye types is hiding. We need a Einstein of sight to get out the bigger equation here. Anyways it seems so unlikely that such limited options for eye types would now/fossil be around. There should of been great heaps of types of eyes if evolution for so long was going on while changing everything else.

terenzioiltroll · 7 July 2011

Robert Byers said: Always it was noted everyone had eyes, ears, butt, legs, and the insides all were alike and in the same places.
Like arthropods and chordates having neural tube and digestive tract in specular positions?
Therefore eyes make the case. Insects simply have different eyes because of some great need for a difference. The rest can have the usual way.
Arthropods are modal among eumetazoa, not chordates: what do you mean by "usual"?
I understand octopus have eyes like us. Yet not because of evolutions hand.
They don't.
I suspect there is a deeper equation to sight that these divisions of eye types is hiding. We need a Einstein of sight to get out the bigger equation here.
May I humbly put forward two well known such equations? 1/f = (ng/nm - 1) (1/R1 - 1/R2) lensmaker equation n1 sin(theta1) = n2 sin(theta2) Snell equation

TomS · 7 July 2011

Robert Byers said: There is a suggestion from Yec and even iD folks. Common blueprint for biology on major points from a designer.
You choose to ignore my point. There is no one "blueprint" in common among all eyes. Eyes have different degrees of similarity (and difference) throughout the world of life. Eyes in insects share features that are not found in vertebrates or octopuses. Octopuses share features that are not found in vertebrates or insects. Vertebrates share features that are not found in octopuses or insects. To point to one "blueprint", or one "designer", or one anything does not account for more than one collection of features.

John · 7 July 2011

Robert Byers said:
TomS said: Creationists seem to miss the point that it isn't that various living things are similar, but that there is a pattern of similarities and differences, things more or less similar to one another in a nested hierarchy known as the "tree of life". Vertebrate eyes tend to be all rather like one another, and insect eyes tend to be rather like one another. The human body is most similar (in many different ways) to the bodies of chimps and other apes, among all of living things; and those bodies are all somewhat less similar to the bodies of other primates; and so on to lesser degrees, to other mammals, other vertebrates, other animals, etc. It is not easy to ascribe this complex pattern to one "blueprint", or to one "designer", or one "function", "purpose", "raw material", ... one anything. To the best of my knowledge, there has never been a suggestion which accounts for this pattern which does not involve "common descent with modification" (that is, evolution). There are various ways of accounting for evolution: inheritance of acquired traits, divine guidance, chance, upward drive, selection, entropy, elan vital, symbiosis, quinaries, omega point; but no one has thought of doing without evolution in explaining the "tree of life". And people have decided that they don't need to explain the tree of life. But to account for the pattern without evolution?
ccdhqh There is a suggestion from Yec and even iD folks. Common blueprint for biology on major points from a designer. Always it was noted everyone had eyes, ears, butt, legs, and the insides all were alike and in the same places. It always made sense there was a single basic plan. I don't think anyone ever said God made each kind so different in these points. Why would a creationist not want a common design? it suggests a designer. Its logical. Therefore eyes make the case. Insects simply have different eyes because of some great need for a difference. The rest can have the usual way. yet still the actual law or equation for sight is the same. these divisions do not reflect evolution or happenchance over millions of years but show a very limited list of options. In fact its only because of the unique nature of insects etc that they don't have eyes like us. I understand octopus have eyes like us. Yet not because of evolutions hand. In fact once again the eyes put evolution in a unlikely light. I think theres room for research of the whole idea of sight. I understand eyes have been investigated but I suspect there is a deeper equation to sight that these divisions of eye types is hiding. We need a Einstein of sight to get out the bigger equation here. Anyways it seems so unlikely that such limited options for eye types would now/fossil be around. There should of been great heaps of types of eyes if evolution for so long was going on while changing everything else.
Sorry Byers, but TomS is right. The reason why Octopus and human eyes may resemble each other up to a point is due to two different "solutions" brought about by substantially different molecular and developmental biological pathways, not because of any Divine Fiat by an Intelligent Designer(s) interested in giving humans and octopi similar kinds of eyes. Your score of breathtaking inanity is 2, and that's awarded solely upon your intellectual stupidity. Have to try harder next time.

Bobsie · 7 July 2011

Robert Byers said:I understand eyes have been investigated but I suspect there is a deeper equation to sight that these divisions of eye types is hiding.
Could it be that you just can't accept the facts as revealed through honest examination and research and think you can hold out for something more along your perssonal tastes?

mrg · 7 July 2011

Again, who's this "Byers" guy? Who are you talking about? If he's a figment of group imagination, he sounds like a really bizarre one.

Well, I suppose if you get drunk enough, you do see pink elephants. Or so the tale goes, I've never been that drunk myself.

Kevin B · 7 July 2011

mrg said: Again, who's this "Byers" guy? Who are you talking about? If he's a figment of group imagination, he sounds like a really bizarre one. Well, I suppose if you get drunk enough, you do see pink elephants. Or so the tale goes, I've never been that drunk myself.
I'm postulating a "Dawkins' Weasel" program variant that selects for Latin phrases, such as "Cave Canem" (Beware of the Dog) and "Caveat Emptor" (Let the Buyer Beware). In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)

John · 7 July 2011

mrg said: Again, who's this "Byers" guy? Who are you talking about? If he's a figment of group imagination, he sounds like a really bizarre one. Well, I suppose if you get drunk enough, you do see pink elephants. Or so the tale goes, I've never been that drunk myself.
He's a delusional Canadian bureaucrat - I believe he works for the provincial government of Ontario - who is an unrepentant YEC. At least he's funnier than Biggy, Ray Martinez, Steve P. and some of the other, more sanctimonious, creobot lurkers who drive by here.

mrg · 7 July 2011

Kevin B said: I'm postulating a "Dawkins' Weasel" program variant that selects for Latin phrases, such as "Cave Canem" (Beware of the Dog) and "Caveat Emptor" (Let the Buyer Beware). In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)
I don't believe you. This is some sort of a prank, isn't it? You can't fool me! Show me one bit of evidence that this "Byers" actually exists in any way shape or form!

Kevin B · 7 July 2011

mrg said:
Kevin B said: I'm postulating a "Dawkins' Weasel" program variant that selects for Latin phrases, such as "Cave Canem" (Beware of the Dog) and "Caveat Emptor" (Let the Buyer Beware). In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)
I don't believe you. This is some sort of a prank, isn't it? You can't fool me! Show me one bit of evidence that this "Byers" actually exists in any way shape or form!
You wouldn't believe me if I did produce some evidence as you are clearly exhibiting negative confirmation Byers.

terenzioiltroll · 7 July 2011

Kevin B said: In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)
No. It is "Oh you, buyer: beware!" "Beware of the buyer" would be: "Emptor caveandum est".

mrg · 7 July 2011

Kevin B said: You wouldn't believe me if I did produce some evidence as you are clearly exhibiting negative confirmation Byers.
Please. Do you really expect me to believe something so preposterous?! You want to believe in your imaginary nuisance, go ahead, but you can't trick me so easily!

TomS · 8 July 2011

terenzioiltroll said:
Kevin B said: In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)
No. It is "Oh you, buyer: beware!" "Beware of the buyer" would be: "Emptor caveandum est".
"Cave emptorem" or "Emptor cavendus/cavenda est".

Kevin B · 8 July 2011

TomS said:
terenzioiltroll said:
Kevin B said: In this case it seems to have found "Cave Emptor" (Beware of the Buyer) :)
No. It is "Oh you, buyer: beware!" "Beware of the buyer" would be: "Emptor caveandum est".
"Cave emptorem" or "Emptor cavendus/cavenda est".
I only did one year of Latin at school and we only got as far as 2nd Declension Neuter. From the Wikionary "emptores" might be better since it's the plural.

Robert Byers · 12 July 2011

TomS said:
Robert Byers said: There is a suggestion from Yec and even iD folks. Common blueprint for biology on major points from a designer.
You choose to ignore my point. There is no one "blueprint" in common among all eyes. Eyes have different degrees of similarity (and difference) throughout the world of life. Eyes in insects share features that are not found in vertebrates or octopuses. Octopuses share features that are not found in vertebrates or insects. Vertebrates share features that are not found in octopuses or insects. To point to one "blueprint", or one "designer", or one anything does not account for more than one collection of features.
I am saying there is probably one blueprint. The differences are just examples of this blueprint. I mean instead of Newton one should rise up to Einstein. Beyond the eye balls there is a bigger concept, I suggest, to what SIGHT is in biology. a common design or equation of this sight is what one should aim to discover for the sake of healing. Creationism makes a case for this while evolution is stuck in happanchance on details of structures. The reason so many have like eyes is because of like needs and like means. Insects etc etc are missing means and so have different means. Yet they have, I suggest, the same equation of sight going on. I suspect sight is all about light and segregation of light on a objects in the universe. So only a machine is needed to get this light segregationism into the mind. I have been thinking perhaps its more to do with memory mechanisms then images being shot into the brain in a pure way. Anyways its all coming from a idea of a single blueprint and the insects etc just show whats going on when one is very small. Speculation.

TomS · 12 July 2011

Is there any need to point out that you don't rely on one blueprint to explain the variety of vision? There are also "needs" and "means", whatever those might be. Whatever. The "designer(s)" had to work within the constraints imposed by needs and means, as well as a blueprint? Not very well thought out. Which I can't blame you for. But there are all of those smart people who, we are told, have an alternative to "darwinism", and they can't help you out?

John · 15 July 2011

This comment has been moved to The Bathroom Wall.

Just Bob · 15 July 2011

Robert Byers said: I am saying ... I mean ... I suggest... I suggest... I suspect ... I have been thinking ... Speculation.
Why the hell should anyone care what you "suspect" or "suggest"? What training or credentials do you have in biology or any other science that lets you assume your SUSPICIONS could possibly count for anything against a couple of centuries of scientific research?

circleh · 15 July 2011

Just Bob said:
Robert Byers said: I am saying ... I mean ... I suggest... I suggest... I suspect ... I have been thinking ... Speculation.
Why the hell should anyone care what you "suspect" or "suggest"? What training or credentials do you have in biology or any other science that lets you assume your SUSPICIONS could possibly count for anything against a couple of centuries of scientific research?
It's called "word salad". That's all Byers the lyers has got.

Mike Elzinga · 15 July 2011

circleh said: It's called "word salad". That's all Byers the lyers has got.
Aphasia comes to mind. Or perhaps primary progressive aphasia.

mrg · 15 July 2011

People are talking about this "Byers" person again. He doesn't really exist, does he? Looks like a mass delusion in progress.

Mike Elzinga · 15 July 2011

mrg said: People are talking about this "Byers" person again. He doesn't really exist, does he? Looks like a mass delusion in progress.
It’s HAL nine-tenths of the way through shutdown.

mrg · 15 July 2011

"Open the pod bay doors, HAL!"

Just Bob · 15 July 2011

I'm sorry, I can't do that, Dave.

John · 15 July 2011

This comment has been moved to The Bathroom Wall.

John · 16 July 2011

This comment has been moved to The Bathroom Wall.