It's Halloween, so it's time for a roundup of the SCARIEST October stories in the evolution versus creationism wars!
Plants doing unnatural things to animals
More than a few works of horror and
hyperventilating YouTube videos have been inspired by the Venus Flytrap (
Dionaea muscipula), a plant with jaws and "teeth" that has a nasty habit of eating bugs that get too close after being lured in by red coloring and secreted nectar.
The actual plant isn't very big, and the traps don't get bigger than a quarter, but imagine what a bug would think, if bugs could think:
The Venus Flytrap: So inviting, yet so dangerous. Source: wikipedia.
Creationists like the Venus Flytrap too! In fact, decades before Michael Behe made the mousetrap and its "irreducible complexity" (IC) a thing, the
traditional creationists were arguing that the Venus Flytrap trap was too complex to have evolved gradually, and that it must have been designed instead. I guess they thought God had an inordinate hatred of beetles.
The ID people sometimes venture into the Little Shop of Horrors, for example with this
October 14 post on the Discovery Institute website,
The Venus Flytrap, an Improbable Wonder that Baffled Darwin.
The Discovery Institute post, by the way, might well be authored by David Coppedge, the young-earth creationist who runs the website
Creation-Evolution Headlines and who in 2012
lost a lawsuit against JPL, after
a huge amount of drama and rhetoric from the DI. It rather fits his style -- quote a new paper, refuse to do any due diligence to look to see if there has ever been any research at all on the evolution of the system in question, and declare victory. The main evidence against it being Coppedge is that it begins with "here in Seattle", unless Coppedge has moved from LA to Seattle.
In any event,
"dcoppedge" has definitely written lots of posts for the DI's Evolution News and Views (although some of these are by other authors, perhaps indicating a shared account and/or Coppedge doing website work in addition to straight writing). I guess after his JPL loss, Coppedge has been working for the Discovery "we're not creationists, we swear!" Institute. Strange that he's not listed as an author anywhere on the DI website. Are they...
SCARED? Accuracy of the connection between ID and creationism -- the horror!
Anyway, you know who else likes Venus Flytraps? Why, evolutionists.
Have a look at the logo for next year's Evolution 2014 meeting in Raleigh, North Carolina:

Venus Flytraps are native only to a small region of swampy, coastal North and South Carolina. So that's one reason to put them on the Evolution 2014 banner. But why that species and not some other endemic species? Obviously, Reason #1 is that flytraps are just awesome, but reason #2 is that Charles Darwin himself realized they were awesome, famously calling the Venus Flytrap "
the most wonderful plant in the world." (I believe
this is the original letter, although the Darwin Correspondence Project does not have the full text online yet. The letter was published in
Natural History in 1923 by Frank Morton Jones; Harvard Forest has conveniently
put the article online at this website,
direct PDF link)
Here's the actual quote, in Darwin's handwriting!

Here's the full page of the letter (click to zoom).

...and Jones (1923) has some great commentary reviewing the correspondence between Darwin, Asa Gray, and Canby, including material on how it was Darwin who figured out that the gaps between the teeth of the Flytrap probably had the function of letting small insects escape, after which the trap could reopen without undergoing an expensive digestion step -- whereas large beetles and the like were trapped by their size and doomed to a grisly death and digestion in an acid bath.
Short version of what Gray says to Canby about Darwin:
Darwin has hit it. I wonder you or I never thought of it... Think what a waste if the leaf had to go through all the process of secretion, etc., taking so much time, all for a little gnat. It would not pay. Yet it would have to do it except for this arrangement to let the little flies escape. But when a bigger one is caught he is sure for a good dinner. That is real Darwin! I just wonder you and I never thought of it. But he did.
(Asa Gray, writing to Canby, quoted by Jones 1923, p. 595, emphasis original)
As careful scholars, but not creationists, have long observed: Darwin made important scientific advances in lots of areas, not just the theory of evolution.
There's another reason evolutionists love Venus Flytraps: we know, basically, how the trap evolved! The basic story is pretty obvious to anyone familiar with the traps of the relatives of Venus Flytraps. The closest relative,
Aldrovanda, also has a snap-trap, but an aquatic version. Since
Dionaea and all of the other relatives are terrestrial, we can infer that the ancestor of the two snap-traps was all terrestrial, although very likely living in swampy, often-flooded ground, like
Dionaea and a great many other carnivorous plants.
The next closest relatives are the species of the genus
Drosera, the sundews. They catch their prey by secreting sticky glue; once something is caught in the glue, the leaves slowly curl around the prey and digest the victim. There is a huge amount of variability of the closing times of
Drosera (of which there are hundreds of species), ranging from days to minutes. Perhaps being stuck in glue and then waiting for days to be digested would be an even more horrifying end for the hypothetical intelligent bug victim, but it would be decidedly less dramatic for the silver screen.
Even more distant relatives are still carnivorous, but lack motion -- they either have sticky leaves without motion (genera
Drosophyllum and
Triphyophyllum), or are pitcher plants (
Nepenthes; interestingly, a few of these are actually "sticky pitchers", indicating that trapping strategies should not be overly essentialized).
Knowing just this information, the basic story is pretty clear to an evolutionist. In the massive 1989 review book
Carnivorous Plants by Juniper et al., which reviewed all work up to that point, but which was published just before molecular phylogenetics took off, the story was clear enough to diagram:
Figure 19 from Juniper et al. (1989), Carnivorous Plants. Shows the evolutionary origin of the Venus flytrap, Dionaea muscipula.
What happened when molecular phylogenetics was applied to carnivorous plants? Well, a new test of the hypothesis was available. Cameron et al. (2002) showed the results:
Figure 3 from Cameron et al. (2002), showing the phylogeny of the Venus Flytrap (Dionaea) and related carnivorous and non-carnivorous plants.
It's a simple story: first there were plants that trapped with glue, then some of them added the ability to move, and in one surviving lineage, the moving ability became so advanced that glue secretion was no longer needed, and was lost. If, like your typical lazy creationist advocate, all you look at is the Venus Flytrap and some non-carnivorous plant, then the evolution of the flytrap looks like a complete mystery: how could all of those parts come together at once, and how would you have a functioning trap before all the parts came together? Well, here, we had a part, glue, that was essential early on, but later became redundant and was lost. As
Pete Dunkleberg pointed out way back in 2003, this is an example of the "scaffolding" route to an allegedly "irreducibly complex" system.
There is a lot more that could be said about the detailed facts that support this basic model -- especially about recent work inter-relating the "slow" motion of leaves (shared between
Dionaea and
Drosera) and how
Dionaea uses the slow motion to set off the fast motion of mechanical "snapping" of the leaf, and how this trick was independently discovered in some
Drosera with "snap tentacles" (
see this amazing YouTube video, and
others).
However, this is Halloween, so we're going for scary, not endless science details. Here's what's scary: guess who figured out the evolution of the Flytrap first? Here's the quote:
CONCLUDING REMARKS ON THE DROSERACEAE.
The six known genera composing this family have now been described in relation to our present subject, as far as my means have permitted. They all capture insects. This is effected by Drosophyllum, Roridula, and Byblis, solely by the viscid fluid secreted from their glands; by Drosera, through the same means, together with the movements of the tentacles; by Dionaea and Aldrovanda, through the closing of the blades of the leaf. In these two last genera rapid movement makes up for the loss of viscid secretion.
[...]
It is a strange fact that Dionaea, which is one of the most beautifully adapted plants in the vegetable kingdom, should apparently be on the high-road to extinction. This is all the more strange as the organs of Dionaea are more highly differentiated than those of Drosera; its filaments serve exclusively as organs of touch, the lobes for capturing insects, and the glands, when excited, for secretion as well as for absorption; whereas with Drosera the glands serve all these purposes, and secrete without being excited.
[...]
The parent form of Dionaea and Aldrovanda seems to have been closely allied to Drosera, and to have had rounded leaves, supported on distinct footstalks, and furnished with tentacles all round the circumference, with other tentacles and sessile glands on the upper surface.
pp. 355-6, 358, 360
Who came up with this model? Why, it was Chucky Darwin himself, way back in his 1875 book
Insectivorous Plants, or approximately 110 years before anyone else thought of it (the next suggestions of this model that I have found are a 1985 short piece by Ian Snyder in
Carnivorous Plant Newsletter, followed by the work of Juniper and others, in the book and related articles from the late 1980s).
While we're on the topic, it is worth noting that Darwin's
Insectivorous Plants was, pretty much, the book that codified the whole idea that "carnivorous plants" were a thing, i.e. a coherent phenomenon worthy of a name and dedicated comparative study. While Hooker and other botanists were of course in the know before this (Darwin's friend Hooker was the one to do the first big review of pitcher plants, something certainly prearranged by the two of them) it was Darwin's book that seems to have brought the whole subject to the broad attention of the public, for which the whole idea of plants that moved and ate things was deeply counter-intuitive.
In other words, as Gray said, "Darwin has hit it."
Or, in creationist translation, "AAAAIIIIEEEEEE!!!! It was Darwin himself who framed the entire phenomenon of carnivorous plants which we are now trying to use against him, and furthermore he answered our question about the origin of the Venus Flytraps trap a hundred years before we thought to ask it. The horror! The horror!"
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The most wonderful barnacle in the world
There's another interesting passage in Darwin's
Insectivorous Plants in "Concluding Remarks on the Droseraceae":
There can hardly be a doubt that all the plants belonging to these six genera have the power of dissolving animal matter by the aid of their secretion, which contains an acid, together with a ferment almost identical in nature with pepsin; and that they afterwards absorb the matter thus digested. This is certainly the case with Drosera, Drosophyllum, and Dionaea; almost certainly with Aldrovanda; and, from analogy, very probable with Roridula and Byblis. We can thus understand how it is that the three first-named genera are provided with such small roots, and that Aldrovanda is quite rootless; about the roots of the two other genera nothing is known. It is, no doubt, a surprising fact that a whole group of plants (and, as we shall presently see, some other plants not allied to the Droseraceae) should subsist partly by digesting animal matter, and partly by decomposing carbonic acid, instead of exclusively by this latter means, together with the absorption of matter from the soil by the aid of roots. We have, however, an equally anomalous case in the animal kingdom; the rhizocephalous crustaceans do not feed like other animals by their mouths, for they are destitute of an alimentary canal; but they live by absorbing through root-like processes the juices of the animals on which they are parasitic.*
* Fritz Müller, 'Facts for Darwin, ' Eng. trans. 1869, p. 139. The rhizocephalous crustaceans are allied to the cirripedes. It is hardly possible to imagine a greater difference than that between an animal with prehensile limbs, a well-constructed mouth and alimentary canal, and one destitute of all these organs and feeding by absorption through branching root-like processes. If one rare cirripede, the Anelasma squalicola, had become extinct, it would have been very difficult to conjecture how so enormous a change could have been gradually effected. But, as Fritz Müller remarks, we have in Anelasma an animal in an almost exactly intermediate condition, for it has root-like processes embedded in the skin of the shark on which it is parasitic, and its prehensile cirri and mouth (as described in my monograph on the Lepadidae, 'Ray Soc.' 1851, p. 169) are in a most feeble and almost rudimentary condition. Dr. R. Kossmann has given a very interesting discussion on this subject in his 'Suctoria and Lepadidae,' 1873. See also, Dr. Dohrn, 'Der Ursprung der Wirbelthiere,' 1875, p. 77.
(Darwin (1875), Insectivorous Plants, pp. 356-7).
What the heck is Darwin talking about here? He was talking about carnivorous plants, and then suddenly he's talking about "rhizocephalous crustaceans...allied to the cirripedes". Let's parse this out.
Crustaceans are arthropods; well-known crustaceans include shrimp, crabs, lobsters, barnacles, and very likely insects.
"
Cirri-pede" means basically "hairy-feet", and is the technical term for barnacles, which during their larval stage look like fairly normal crustacean with a head, eyes, and legs:
Cyprid stage of a barnacle (the last stage before sticking to a rock). Source: http://www.mesa.edu.au/friends/seashores/barnacles.html
What makes barnacles weird is that, instead of growing into free-living, hunting adults like respectable crustaceans, they find a comfy rock, glue their head to it, secrete a shell, and eat by filter-feeding from the water with their feathery legs. The resulting headless adult bears almost no external resemblance to its crustacean relatives.
Long before Darwin caught the carnivorous plant bug, and even before he wrote
Origin of Species, he had made himself a world expert on barnacles in a series of monographs on living and fossil barnacles. He did this work between 1846 and 1854 (you can
see it here, and
a summary of it here), and his was the first major modern work on barnacles, as it was
only in the 1830s that zoologists realized that barnacles were arthropods; previously they had been thought to be molluscs. Whoops, wrong phylum! Not everything keeps the "bodyplan" it is supposed to have!
How about "
rhizocephalous crustaceans"? Well, "rhizo-cephalous" means basically "root-head", and rhizocephalous barnacles are root-headed. Normal barnacles, while weird, at least retain a few features of the arthropod bodyplan -- mostly the legs they are waving around in the water. Rhizocephalous barnacles long ago took their ancestral bodyplan, murdered it, and threw it in a ditch somewhere. Lacking even legs, the rhizocephalous barnacles stick their heads to larger animals instead of rocks, and proceed to grow roots out of their heads and suck nutrition from the animals they are parasitizing.
Asa Gray, in his book
Darwiniana,
summarized:
While some plants have stomachs, some animals have roots.
Asa Gray (1876), Darwiniana, p. 323
Being parasitized by the head-roots of some crustacean with low respect for the bodyplan concepts of zoologists probably isn't fun, but it is common -- there are
nine whole families of rhizocephalans, specializing on parasitizing all sorts of critters.
Rhizocephalans have been in the news latest due to
R.R. Helm's article on Sacculina, the parasitic castrators of crabs.
Haeckel's drawing of Sacculina rhizoids parasitizing a crab. Source.
Helm captures their biology in the spirit of the season:
Your new tormenter is a member of one of the strangest groups of animals known. The adult female body of the rhizocephalan is twisted and deformed, not resembling in any way its barnacle cousins living on rocks near shore. She has lost her hard shell, her legs, her eyes, and transformed into sickly yellow roots and sinuous twisting filaments that are slowly grow like black mold through your tissues.
[...]
Just when it seems it couldn't be worse, your abdomen explodes. You're now sterile, and her gonads are erupting out from where your genitals are. Her tumorous ovaries now attract a male rhizocephalan larva, who injects his own cells into her. These grow into testicles within her body. She now has everything she needs for her next takeover.
But none of this bothers you now. She has woven her threads through your brain. She's been secreting chemicals to control you-you've forgotten who you are. You now believe you are female, and the bulge in your abdomen is a brood of your own eggs. Moreover, you are about to give birth. You care for and clean these eggs, as if they were your own.
Read the link for more.
That's enough to scare anyone, but I think it's a particularly scary thing for people with a tendency towards typological views about "phyla" and "bodyplans". This includes creationists, but also, to a degree, some leading biologists, generally those with precladistic educations. I've been on the
general "down with phyla!" stump several times before, but
Sacculina and the other rhizocephalan barnacles make the point even more directly. For example, the assertion is often made that the "phyla" arose in the Cambrian, and that none arose after that. This is often taken to suggest that the basic animal "bodyplans" arose in the Cambrian, and none arose after that. While it's clear to me that rates of morphological evolution were higher in the Cambrian, it's far from clear that "phylum" and "bodyplan" are coherent concepts. What we have is a mixture of concepts -- morphological differentness, and monophyletic groups of a certain age. These have been combined in modern usage, basically because almost everyone agrees that named taxa should be natural and not artificial groups; i.e., they should be monophyletic.
What the monophyly requirement does, though, is eliminate any chance of "new bodyplans" being recognized even if they do appear in evolutionary history. For example, if there ever is a case in animal evolution where a "new bodyplan" does arise -- something really weird morphologically, that bears no resemblance to the other bodyplans -- then, without the monphyly requirement, we would be free to call it a new phylum. Under this situation, we might well discover that new "bodyplans" do originate at some rate, even if the rate is lower than in the Cambrian, and even if it is a somewhat subjective call about what constitutes enough different to constitute a "new" bodyplan.
However, with the monophyly requirement, then as soon as taxonomy advances to the point where the really weird critter is found to be a subset of some other phylum, then the phylum containing the weird critter disappears, as does any chance of a "phylum" originating after the Cambrian! This kind of thing has happened enough times that there is even a list on Wikipedia of "
Groups formerly ranked as phyla" (and I'm pretty sure it's an incomplete list). I assume the artist formerly known as Prince is a fan of these ex-phyla.
To sum up: not only is
Sacculina a terrifying monster that will invade an organism's body, explode its gonads, take over its brain and make it brood more parasites, it also does just about the same thing to the still-popular concepts of "phylum" and "bodyplan". Creationists and typologists, beware! Eeeeeek!
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The terror of being stuck on a boat with...
I've mostly been trying to scare the creationists and the squeamish here, but here's one for the evolutionists. You know those horror movies where someone is stuck on a boat with a ghost/pirate/murderer/monster?
Well, imagine you've signed up for a relaxing summer cruise in Alaska. You will see glaciers and whales and sea otters, and enjoy the beauty of nature and learn a little biology while you're at it. Then you realize, to your horror, that you are on
this boat:
It's a once-in-a-lifetime chance: participate in a floating conference about intelligent design, with some of the world's most stunning natural scenery as a backdrop. What better place and what better time -- Alaska at the height of summer! -- to meet the stars of Discovery Institute and learn in depth about the ultimate questions that science has ever asked: How did the universe begin? How did life arise? How did complex life develop?
Explore these subjects and much more on the first ever Discovery Institute cruise. That's July 26 to August 2. Make your reservation now!
Join us for a fantastic opportunity to learn about the beauty and design in nature while experiencing it first hand. This weeklong conference will take place on Holland America's splendid and luxurious Westerdam ship, and will take participants from Seattle to Alaska, and back. Featured speakers will include Dr. Stephen C. Meyer, New York Times bestselling author of Darwin's Doubt: The Explosive Origin of Animal Life and the Case for Intelligent Design, and renowned Oxford University mathematician and author Dr. John Lennox.
We'll be announcing more speakers in the near future. The theme of the conference will be "Science & Faith: Friends or Foes?"
Space is extremely limited. Reserve your room now to get the best selection and pricing!
(Source: DI, formatting original)
A week trapped on a boat with the stars of the Discovery Institute! Suddenly
Sacculina doesn't look so bad!
.
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Update 11/5/13:
Joe Felsenstein contributes some additional details on the history of barnacle taxonomy here. Lamarck removed barnacles from molluscs in 1812, but put them in their own independent group. This made both barnacles and molluscs both of rank "Class". The rank "Phylum"
apparently didn't exist until Haeckel invented it.
(Also fixed some typos. Ugh!)
223 Comments
Ray Martinez · 31 October 2013
If one reads Nick's claims concerning fly traps closely one discovers that he doesn't provide any evidence of evolution; all he does is identify several similar plants then assumes and asserts that evolution has occurred. Of course this is the main characteristic of evolutionary thinking: assume discovery of similarity to mean evolution has occurred.
Nick Matzke · 31 October 2013
Hmm. Why then did the DNA form a tree that confirmed the (((Dionaea, Aldrovanda), Drosera), Drosophyllum) relationship that Darwin postulated 125 years before based on morphology?
Mike Elzinga · 31 October 2013
Picture a science classroom in a state that passes “teach the controversy” or teach “strength and weaknesses of evolution (but not ID/creationism)” while making it illegal to give failing grades to creationist students who get their teacher-challenging questions from Jack Chick, or AiG, or the DI. That would be a classroom that looks a lot like the Uncommonly Dense site.
DS · 31 October 2013
Indeed, why do any gene comparisons form nested hierarchies? If as Ray claims, species are immutable, then they are actually not related to each other. And note that the answer is not common design. The nested hierarchy extends to molecular characters that do not affect phenotype. The nested hierarchy extends even to organisms that are not superficially similar morphologically, such as whales and hippos.
Ray hasn't learned anything in the last hundred and fifty years. The sad thing is that he apparently thinks that no one else has either.
I would suggest that the one post per thread rule to applied to Ray. Otherwise...
Ray Martinez · 31 October 2013
DS · 31 October 2013
Well Ray, perhaps you can explain the observed pattern. You know, provide a better explanation than evolution for the nested hierarchy. See Ray, the thing is that this is the exact pattern that is predicted by evolution. And actually the causal mechanisms are well known. So until you can come up with a better explanation, you have exactly nothing.
And the genes almost always give the same relationships as morphology. When they don't give the same answer there are good reasons why they don't. But then again, you wouldn't know anything about modern science now would you Ray.
Robert Byers · 31 October 2013
You want scarrry! Just read Darwins second book !! Conclusions and methodology for those conclusions will make even the most Darwin-believer leave the room screaming!
I wish a creationist would write a book on Darwins ideas, and research thereto, revealed in his second book. it would shed light on the first.
Anyone want to sponsor me?! Probably another best seller creationist book.
https://www.google.com/accounts/o8/id?id=AItOawm-WhebH0itIDDTj06EQo2vtiF0BBqF10Q · 31 October 2013
Seems like Steve Meyer is authoring post's on Darwin's Doubt for David Klinghoffer.
didymos1120 · 1 November 2013
https://www.google.com/accounts/o8/id?id=AItOawm-WhebH0itIDDTj06EQo2vtiF0BBqF10Q · 1 November 2013
Nick Matzke · 1 November 2013
Agreed that the accounts evidence is confusing. Maybe the "accounts" are some weird guess that google is making independently?
Anyway, there's no doubt Coppedge is a writer for the DI. E.g., this post from...October 31 is 100% Coppedge's style:
http://www.evolutionnews.org/2013/10/intelligent_des_12078571.html
All it's missing is the YEC spin at the end, Coppedge just suppresses the YEC and puts in some ID spin instead typically.
Joe Felsenstein · 1 November 2013
Evidence of agreement between phylogenies made from different parts of the genome, and from characters in different parts of the organism, is the strongest evidence we have for common ancestry. Stronger than fossils, because we can use it for organisms that hardly ever fossilize, and be completely convincing.
Similar evidence convinced most biologists in the 19th century, so that opposition to common descent basically collapsed in the late 1800s.
Our local creationists are stuck back about 1820 and haven't gotten the word.
Henry J · 1 November 2013
But does any of this explain the DJ on WKRP in Cincinatti? (Not Johnny, the other one.)
Henry J · 1 November 2013
Or Cincinnati, even.
Les Lane · 1 November 2013
Creationist beliefs rest on maintaining the inability to distinguish "similarity" from "nested similarities."
Just Bob · 1 November 2013
Jared Miller · 1 November 2013
Hi Ray, I think your objection is valid in a sense, but is perhaps somewhat too strict for the "historical" sciences, where there is no opportunity to roll a 10,000- or, in the case of evolution, a many-million-year long film.
If one were to apply your criterion to my field, for example, ancient Near Eastern studies, I don't think I could legitimately conclude that, let's say, the cuneiform script used in Urartu in the 9th-8th cent. BC was "genetically" related to the very similar script used by Assyria before and during that time. Nonetheless, I am tempted to conclude that a borrowing took place, even though I doubt I will ever be able to point to the exact time, place and causal factors behind such a borrowing. Of course, I remain very open to the possibility that it may have occured in some other way if and when such evidence should become available. Do you see my thoughts on this matter as reasonable, or no?
A related question on such "historical" sciences would naturally be, what manner of evidence could a scientist point to in order to construct a convincing case for evolution if the data and argumentation presented above are not sufficient? And in the case of other historical sciences?
All the best, Jared
Nick Matzke · 1 November 2013
Ray's idea, which is that "overall similarity" is what is used to classify organisms, is known as phenetics, and was abandoned decades ago in evolutionary biology. Overall similarity reliably represents phylogeny only under the special case of clocklike evolution at constant rates. Although, statistically, it works well enough in many cases, which is why the Linnaean hierarchy, despite its problems, was a good first-order argument for common ancestry, in Darwin's day and now, and why Darwin was able to figure out the Droseraceae pretty well (note that there are mistakes in the more remote parts of his classification -- we now know that Nepenthes is a relative of Droseraceae, and Byblis and Roridula are not)
The reason Hennig is famous is that he pointed out that similarities are of two types -- shared ancestral character states (symplesiomorphies) and shared derived character states (synapomorphies). Only the latter are informative about shared history, i.e. phylogenetic relationship. With whales, cows, and horses, synapomorphies in fossil whales actually allow us to group whales and cows (and other artiodactyls) against horses (perissodactyls). Fossil whales with legs, and other artiodactyls, have e.g. a double-pulley astragalus bone in their ankles, and they share features of their skulls and earbones. This was all covered by Kevin Padian in the Dover trial:
http://www.sciohost.org/ncse/kvd/Padian/Padian_transcript.html#whales
So, whales were a case where increased knowledge of the fossil record ended up confirming the relationship of whales within artiodactyls that was suggested first by molecular data (e.g., the whale pseudogene for Hageman factor, one of the components of the "IC" blood-clotting cascade: http://www.ncbi.nlm.nih.gov/pubmed/9678675 )
The features that cows and horses share -- 4 legs, body covered with hair, etc. -- are all character states shared much more widely, they do not specifically group cows and horses against everything else. The only way there would be an ambiguity about this would be if a biologist had only 3 species and absolutely no information about anything else. This is an unrealistic situation in real science, it only occurs in the poorly-informed minds of creationists.
Even if Ray or whoever wants to just ignore all of the above, it's not as if whales went just anywhere in phylogenetic trees. They've always been placental mammals, whatever their detailed placement. If some studies said whales were subgroups of ferns, other said they were subgroups of Archaea, and others said they were frogs, THEN we'd have an actual large incongruence. Bouncing around within merely placental mammals is a small incongruence in the grand scheme of things.
DS · 1 November 2013
Karen S. · 1 November 2013
You know what is scary to a believer? The very idea that Behe's god would design a blood parasite to make us sick.
Karen S. · 1 November 2013
make that blood-borne
Just Bob · 1 November 2013
diogeneslamp0 · 1 November 2013
@PT: Rhizocephalan parasite body has only female gonads & remains of brain; so totally dependnt on host 4 nourishmnt: GOP's ideal 4 women.
[Tweeted from DiogenesLamp0, a twitter feed for wit related to science & pseudoscience]
KlausH · 1 November 2013
Robert Byers · 1 November 2013
Robert Byers · 1 November 2013
ksplawn · 1 November 2013
ksplawn · 1 November 2013
Correction: Some onions only have about five times more DNA than their cousins.
Joe Felsenstein · 2 November 2013
Nick Matzke · 2 November 2013
Ray Martinez · 2 November 2013
phhht · 2 November 2013
Ray Martinez · 2 November 2013
Rolf · 2 November 2013
Ray Martinez · 2 November 2013
PA Poland · 2 November 2013
Les Lane · 2 November 2013
Ray needs to understand DNA sequencing and nested similarities if he wishes to contribute meaningfully to discussions of evolution.
Nick Matzke · 2 November 2013
Nick Matzke · 2 November 2013
apokryltaros · 2 November 2013
Pierce R. Butler · 2 November 2013
Mike Elzinga · 2 November 2013
Scott F · 3 November 2013
It has always amazed me that some people can look at the range of semi-acquatic mammals (otters, seals, sea lions, etc) and claim with a straight face that there are no, and could never have been any transitional forms between a mammalian life on land and life in the water. No, not that these animals are in any way a "missing link" between cows and whales. It's just that we have actual living, swimming examples of mammals who are halfway between being a fully land-based animal and a fully water-based animal.
Exactly like the claims that there are no extant examples of forms of "intermediate" eyes, or "intermediate" forms of blood clotting, or of creatures transitioning from water to land.
It's one thing to close your mind to certain "interpretations" of historical data, to "mere" "ideas". But to close your mind to the physical existence of creatures you can go and see and touch today is just mind boggling inane.
TomS · 3 November 2013
stevaroni · 3 November 2013
stevaroni · 3 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 3 November 2013
Ray's problem is that he thinks common sense always works. It doesn't. Case closed.
KlausH · 3 November 2013
Tenncrain · 3 November 2013
Robert Byers · 3 November 2013
https://me.yahoo.com/a/hHXYfJpysYHQ3610gllC7ldTYTqv#37db0 · 3 November 2013
Chris Lawson · 4 November 2013
Being bipedal and about our size, emus must be our closest living relatives. Thanks, Ray. You've made biology much clearer!
DS · 4 November 2013
Byers has had his one incoherent post on this thread. If his posts are allowed to remain, he must explain why whales are genetically more similar to terrestrial mammals then to fish or he must STFU and stop using bullshit, irrational arguments like: "if there is any possibility of any alternative, even if it obviously isnt true, then im right and your wrong, regardless of the evidence." (It was supposed to be a quote remember).
Matt G · 4 November 2013
It's being held aboard a cruise ship? Wouldn't an ark be more appropriate?
Joe Felsenstein · 5 November 2013
Helena Constantine · 5 November 2013
gnome de net · 5 November 2013
Ms. Constantine,
I stand in awe of your ability to extract any meaning from that Byers word salad.
Nick Matzke · 5 November 2013
harold · 5 November 2013
harold · 5 November 2013
diogeneslamp0 · 6 November 2013
Tom · 6 November 2013
TomS · 6 November 2013
I want to mention where I came across sirenians as evidence for macro-evolution. One of the foremost authorities on the sirenian fossil record, Daryl P. Domning, is a Roman Catholic and published a book reconciling evolution with original sin:
Original selfishness: original sin and evil in the light of evolution
by Daryl P. Domning ; with foreword and commentary by Monika K. Hellwig.
Aldershot, England; Burlington, VT : Ashgate, 2006
ksplawn · 6 November 2013
If anybody out there is interested in a somewhat more thorough look at the evolution of sirenians (sea cows, dugongs, and manatees) than Wikipedia can provide, I found this nifty PDF that goes over the whole shebang. Included at the bottom of page 4 is a nice picture of an extinct, 15 million year old dugong species with clearly vestigial hind limbs dangling off the pelvis. Hard to think of what kind of "function" a Creationist would assign to those little bones to make them "not vestigial," according to the Creationist understanding of the term.
Ray Martinez · 6 November 2013
Ray Martinez · 6 November 2013
phhht · 7 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 7 November 2013
DS · 7 November 2013
DS · 7 November 2013
Ray Martinez · 7 November 2013
Just Bob · 7 November 2013
Ray Martinez · 7 November 2013
DS · 7 November 2013
Thanks for answering my question Ray. So much for common sense. At least yours.
Ray Martinez · 7 November 2013
Ray Martinez · 7 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 7 November 2013
I think Darwin would have answered that natural selection explains all those things, Ray. Have you read the book or just a list of creationist quotes from it?
Even for you, the reply to DS about common sense is lame. Surely you can comment on geocentrism and common sense. Is the earth moving or not?
DS · 7 November 2013
Ray Martinez · 7 November 2013
phhht · 7 November 2013
phhht · 7 November 2013
Ray Martinez · 7 November 2013
PA Poland · 7 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 7 November 2013
I thought we were talking about common sense? I am not saying anything about the support of evolution, but whether common sense is always correct. You claim evolution does not make common sense therefore it is incorrect. Please try to keep in touch with your own arguments.
DS · 7 November 2013
prongs · 7 November 2013
Just Bob · 7 November 2013
Ray Martinez · 7 November 2013
phhht · 7 November 2013
Ray Martinez · 7 November 2013
phhht · 7 November 2013
Ray Martinez · 7 November 2013
prongs · 7 November 2013
Just Bob · 7 November 2013
Just Bob · 7 November 2013
Oh, and what is the cause of the existence of God? If EVERYTHING has a cause, then so does She.
Let me guess, it's turtles all the way down.
PA Poland · 7 November 2013
PA Poland · 7 November 2013
Ray Martinez · 7 November 2013
phhht · 7 November 2013
Ray Martinez · 7 November 2013
phhht · 7 November 2013
PA Poland · 7 November 2013
fnxtr · 7 November 2013
I'm just having a hard time understanding why you let this Martinez loon get under your skin. (shrug)It's not like you're going to convince him he's wrong. You might as well argue with Byers. Or your tea kettle.
Robert Byers · 8 November 2013
KlausH · 8 November 2013
Just Bob · 8 November 2013
ksplawn · 8 November 2013
DS · 8 November 2013
As long as he wants to believe it it's fine. But as soon as he doesn't want to believe it it can't be true, no reason needed, just his opinion is enough. Same with the Ray character. Science is great, just as long as it goes along with their preconceptions. If it doesn't it's wrong, no evidence necessary. That's how science works, right? All those findings are exactly what everyone wanted to be true all along, right?
adrianwht82 · 8 November 2013
Please don't insult kettles, fxntr. Mine provides me with hot water for my coffee, it is useful. Byers and Martinez are both useless.
Bobsie · 8 November 2013
https://me.yahoo.com/a/hHXYfJpysYHQ3610gllC7ldTYTqv#37db0 · 8 November 2013
ksplawn · 8 November 2013
Ray Martinez · 8 November 2013
Ray Martinez · 8 November 2013
Ray Martinez · 8 November 2013
https://me.yahoo.com/a/hHXYfJpysYHQ3610gllC7ldTYTqv#37db0 · 8 November 2013
phhht · 8 November 2013
https://me.yahoo.com/a/hHXYfJpysYHQ3610gllC7ldTYTqv#37db0 · 8 November 2013
Dave Luckett · 8 November 2013
"Your assumption that “similarity” to not convey face value meaning, and nested hierarchies, and affinity among a wide range of species, is the only problem here."
What on Earth does this collection of words - it's not a sentence - even mean?
Robert Byers · 9 November 2013
Dave Luckett · 9 November 2013
And to think, over on the "Working Again" thread they're bitching about a lousy dangling participle.
adrianwht82 · 9 November 2013
gnome de net · 9 November 2013
Helena Constantine seems able to decrypt the Byers Code.
Helena, where are you?
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Bobsie · 9 November 2013
ksplawn · 9 November 2013
Ray Martinez · 9 November 2013
Ray Martinez · 9 November 2013
Ray Martinez · 9 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 9 November 2013
Ray, are you ever going to answer the question about common sense? Do you actually know what counterintuitive means?
Go out on your back porch today and watch the sun - what was the common sense explanation for its movement through the sky?
Do the same with the moon tonight - see anything different?
Once again, Is common sense always reliable?
phhht · 9 November 2013
PA Poland · 9 November 2013
Scott F · 9 November 2013
Ray Martinez · 9 November 2013
Scott F · 9 November 2013
Scott F · 9 November 2013
Scott F · 9 November 2013
Scott F · 9 November 2013
Helena Constantine · 9 November 2013
Helena Constantine · 9 November 2013
Scott F · 9 November 2013
Reflecting further, my understanding is that the root Scientific "cause" of Life is pretty well understood: asymmetric chemical bonds leading naturally and inevitably to self assembling and self polymerizing molecules, with no miracles required. The rest is just Evolution. The specific pathways, the specific processes involved is what the Scientific search for Abiogenesis is all about. "How" did we get from simple, self assembling amino acids to the more complex self assembling molecules, are the open and interesting questions being investigated by Science today. But the root "cause" is well known, in a Scientific sense.
But just like the definition of the word "Theory", the word "Cause" has different meanings for the Layman and for the Scientist.
Ray, I suspect by "cause" you aren't talking about a "how" question in the Scientific sense, but rather you are talking about a "why" or "who" question in the Layman sense. Again, questions like "why" is there Life, or "who" "caused" Humans to exist are Theological questions, with thousands of different, mutually contradictory answers, depending on what religion you believe in at the moment.
Scott F · 9 November 2013
ksplawn · 9 November 2013
Just Bob · 9 November 2013
TomS · 10 November 2013
Dave Lovell · 11 November 2013
DS · 11 November 2013
The really funny thing is that , if you search the term "natural selection" on You tube, you get over 85,000 hits. Her is a good one:
http://www.youtube.com/watch?v=R6La6_kIr9g
Now of course none of this is good enough for Ray. He wants to actually see it happen right before his eyes, no doubt including adaptation and speciation. Seeing the bird eat the seed or the moth just isn't good enough for him, he demands an impossible standard of proof and will just move the goal post even if the standard he sets is met. He will no doubt come up with some nonsensical reason why none of this counts, even though it was exactly what he demanded. And of course he won't even read any scientific literature, he just knows that all them experts is just lying to him, just cause. They is all atheists out to get him, don't you know. Meanwhile, species continue to change and evolve and adapt and speciate, while Ray remains immutable and impervious to evidence, as well as logic and reason.
DS · 11 November 2013
Here you go Ray. Here is a video of the birds actually eating the moths:
http://www.youtube.com/watch?v=R6La6_kIr9g
What's that you say? That isn't good enough for you. You actually want a video of the moths changing color right before your eyes' That's what I thought. Look at the equations presented in the video, then tell us that that's what you want Ray. It'll be good for a lough. Besides, I'm sure there is a video out there somewhere where the moths actually do change color while you watch. Or I could make one by just gluing some moths to some trees.
Look Ray, the moths did change color, so your "immutable" bullshit is destroyed, Deal with it already. We've known about this for one hundred and fifty years, Get a clue dude.
Henry J · 11 November 2013
Moths are not chameleons!
apokryltaros · 11 November 2013
Tenncrain · 11 November 2013
Tenncrain · 11 November 2013
This informative video addresses the common design vs common descent question. Be advised there are a few minor gaffs (such as the claim that all mammals inherited internal gestation which overlooks egg laying mammals like the platypus). Nevertheless, the link is a good visual explanation on how the common design claim is a no-go, unless the "designer" either likes to yank the chains of us mere mortals or is seriously incompetent.
TomS · 12 November 2013
DS · 12 November 2013
Scott F · 12 November 2013
Henry J · 12 November 2013
But why the heck would anti-evolutionists want people to think that a basic principle was a tautology? I'd think they'd want the basic principle to be false, but a tautology is something that's always true simply by logic, without need of evidence. So if that argument "worked", they'd be undermining their own position. (so what else is new?)
apokryltaros · 12 November 2013
ksplawn · 12 November 2013
Henry J · 12 November 2013
Ray Martinez · 14 November 2013
DS · 14 November 2013
Ray Martinez · 14 November 2013
Ray Martinez · 14 November 2013
DS · 14 November 2013
Ray Martinez · 14 November 2013
eric · 14 November 2013
PA Poland · 14 November 2013
Ray Martinez · 14 November 2013
Dave Lovell · 14 November 2013
Ray Martinez · 14 November 2013
Ray Martinez · 14 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 14 November 2013
Ray Martinez · 14 November 2013
Dave Lovell · 14 November 2013
Ray Martinez · 14 November 2013
Dave Lovell · 14 November 2013
DS · 14 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 14 November 2013
eric · 14 November 2013
eric · 14 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 14 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 14 November 2013
intuitive - based on what one FEELS to be true even without conscious reasoning.
What we want is to use conscious reasoning to know what is actually true.
Ray, you feel evolution is false, but I know it to a much better fit to reality than special creation or species fixity or intelligent design, etc.
DS · 14 November 2013
It doesn't matter whether Ray "observes" natural selection or not. The fact is that the moth population changed over time. The fact is that the Finches changed over time. The fact is that species are not "immutable".
Now if Ray doesn't like natural selection as a mechanism, he is free to come up with a hypothesis with more predictive and explanatory power. Of course it has make "sense", at least to Ray. Of course it must be "intuitive", at least to Ray. And somehow, it must be something that every real scientist has overlooked for the last five hundred years.
Good luck Ray. We is all a waitin on ya.
Just Bob · 14 November 2013
Other animals aren't good at accepting counterintuitive reality. They're pretty much locked into their intuitions. They don't do SCIENCE.
How often do you see dead animals along the highway? They're not uncommon even on city streets where I live. But I've never seen a human pedestrian flattened in the middle of the road. That happens so rarely that it's at least a major local news story. Not so much with squirrels, or deer, or opossums, or cats.
Here's why: Other animals rely on their intuition about how fast a large object could be approaching, honed by their ancestors' experience with large animals in their environment. Bears and bison don't go 70 MPH. And nonhuman animals probably lack any useful intuition about bright lights bearing down on them at night. If their intuition tells them to do anything, it's probably to freeze: the "deer in the headlights".
Humans, being mostly smarter than most other animals, have learned NOT to rely on our intuition so much. That's our edge over the other critters. We have learned to "see" what is not obvious: fire can be tamed; stones can be reshaped; there are invisible kinds of light; something COULD be approaching faster than a sprinting deer; the Earth is round and rotates and moves around the sun; the environment can change substantially over many lifetimes; offspring are never identical to their parents, and those differences can accumulate to end up in huge changes.
But some humans refuse, or are unable, to use our power of seeing beyond the obvious. Or they're trapped in the obvious, the intuitive, even when it's dead wrong. They can't see evolution happening, and THEIR RELIGION TELLS THEM IT CAN'T BE, therefore it must not be.
Deer in the headlights.
RWard · 14 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 14 November 2013
KlausH · 14 November 2013
DS · 14 November 2013
Henry J · 14 November 2013
Just Bob · 14 November 2013
Henry J · 14 November 2013
Henry J · 14 November 2013
I thought the reason that kinetic energy of an object approaches infinity as its speed of approaches the speed of light, was that continuing to accelerate it requires also accelerating the kinetic energy that it already has, as well as the object's rest mass.
Then there's also the relationship between length contraction and the wavelength of the moving object, and that wavelength is proportional to its momentum.
Henry
Helena Constantine · 15 November 2013
Helena Constantine · 15 November 2013
Helena Constantine · 15 November 2013
Helena Constantine · 15 November 2013
TomS · 15 November 2013
Common sense tells me that humans are the relatives of chimps and other apes. It has long been observed that we are a lot like monkeys and apes, perhaps embarrassingly so.
When was it that someone first came up with the idea that we are not related to other animals? I'm going to make a wild guess, that it was only after "On the Origin of Species" came out and made that kind of relationship a big deal. Off hand, I'm not aware of any Christian objection, in the early Church or in the Bible, to such a relationship, but I haven't made any systematic search for this.
prongs · 15 November 2013
eric · 15 November 2013
https://www.google.com/accounts/o8/id?id=AItOawnKupVGX70N9ZsvLu8iScIzWpyVj8bds_Q · 15 November 2013
Ray,
FYI http://phenomena.nationalgeographic.com/2013/11/15/a-long-way-left-up-darwins-mountain/
Just Bob · 15 November 2013
DS · 15 November 2013
Eric wrote:
"Since the current subject of the thread seems to be common sense and intuitiveness, I’d say that for situations like this the best thing to do is admit that our common sense notions of time, speed, etc. are just no good at describing what’s going on. ‘The subjective speed is infinite’ is a less accurate statement than ‘our human notion of speed no longer applies.’
Thanks Eric. That was my point. Common sense didn't give the right answer, relativity gave the right answer. Common sense doesn't tell you where new species come from, Darwin tells you where new species come from.
And Ray remains senseless.
Henry J · 15 November 2013
Yeah, common sense consists of ad-hoc rules that are based on personal experience. Those rules just don't cover things that are significantly different than what the person has dealt with personally.
DS · 15 November 2013
KlausH · 16 November 2013
Jon Fleming · 16 November 2013
Helena Constantine · 16 November 2013
It came to me this morning like a revelation what Ray is gibbering about. He claims that Darwin's observation that the selection made of domestic animals by farmers provides a model for natural selection is in fact proof of his assertion that early farmers introduced variation into their livestock, hopelessly confusing variation and selection (to the degree he thought my clear statements on the matter were actually confused).
His Darwin lie is just meant to put a ps.-scientific dress on his essential religious belief. He believes that farmers were able to introduce variation into plants and animals because the Bible says they were able to do so. Why are you ashamed to admit it, Ray? The book of Genesis describes how Jacob caused his sheep to bear offspring with particular colors and patterns of wool by making them look at similar patterns while they were mating (this was actually a widespread ancient belief--the Roman poet Martial has an amusing piece about the unfortunate woman who happened to glance at her pet monkey at the moment of conception--thought to equal the time of the man's emission since they believed the ejaculate grew into the fetus like a seed growing into a plant).
So Ray, it seems that you are desperately trying to justify your obviously false and irrational religious belief (the inerrancy of the Bible) by a veneer of ps.-scientific lies. How do you think your arguments can be taken seriously? But if my revelation is incorrect, please explain clearly and fully what your true beliefs are, and how they differ from what I've suggested.
AltairIV · 16 November 2013
prongs · 16 November 2013
Scott F · 16 November 2013
If a photon is traveling at the speed of light, and also has an oscillation perpendicular to the velocity vector, wouldn't the combined motion vector (forward speed + oscillation) be moving ever-so-slightly faster than the photon? (That's probably a really bad analogy. It assumes that some "part" of the photon is oscillating.) But then that raises the question, of what is actually oscillating. It is the electric and magnetic fields within the photon. (Right?) But, isn't the photon the particle that is conveying the electromagnetic fields?
This whole notion that "fields" are actually made up of certain particles "exchanging" certain other particles is just bizarre.
Dang, this stuff really is counterintuitive. (And hence, by Ray's definition, senseless and therefore wrong.)
I sure wish I could have sprung that one on the 3rd semester physics TA. "The professor's explanation contradicts my intuition, and doesn't make any sense to me (i.e., it is counterintuitive and senseless). Therefore the professor is wrong." That sure sounds like a good answer to me! Gotcha, stupid professor! It would have saved a lot of studying in college.
prongs · 17 November 2013
Some experiments with light are best understood as propagating waves, while others are better understood as particles. Mixing the two together, into one, leads to contradiction and is not recommended.
Common sense derives from our everyday experience of the macroscopic world around us. Projecting that understanding into the very large, or the very small, requires amendments that don't make sense to us. Nevertheless, they are real, and repeatable, leading to predictions that are confirmed.
The Old Orthodoxy, well-grounded in the Bronze Age, wants none of this.
Just Bob · 17 November 2013
'Common sense' told us that there was no speed of light--it was instantaneous.
And a toddler 'intuitively' knows that if he closes his eyes, you can't see him!