The gaps keep getting smaller and smaller
As we all know, Tiktaalik roseae is a magnificent example of a transitional fossil connecting aquatic critters--fish--with tetrapods, 4-limbed critters. Nevertheless, there are still gaps in that transitional sequence. A recent PNAS paper (link to abstract; full paper is behind a paywall) describes fossils of early amphibians that are later than Tiktaalik and are within Romer's Gap. Romer's Gap is a period around 15 million years long, from roughly 360mya to 345mya, where (up to now) there was a distinct lack of fossils of proto-tetrapods or related critters. The new PNAS paper's senior author is Jenny Clack, one of the most prominent paleontologists studying that era, (along with people like Neal Shubin and Per Ahlberg. Per was an active commenter on the late lamented Internet Infidels Discussion Board way back when I was an administrator of IIDB.
With these new fossils, the transition from water to land animals is becoming nearly as well documented as the synapsid to mammal transition. Nobel Intent has more on the new paper.
124 Comments
Reed A. Cartwright · 16 March 2012
No, the gaps are getting more numerous.
Atheistoclast · 16 March 2012
I'm not sure if you actually read the paper. It describes finds from Scotland that fill in gap in the timeframe of the fossil record, not a physiological gap in the transition from fish to tetrapods. The "proto-tetrapods" are proper amphibians and not some monstrous intermediate kind.
Richard B. Hoppe · 16 March 2012
SteveF · 16 March 2012
Per still comments regularly here:
http://talkrational.org/forumdisplay.php?f=23
Although he hasn't actually talked about this latest paper.
Atheistoclast · 16 March 2012
Paul Burnett · 16 March 2012
apokryltaros · 16 March 2012
Chris Lawson · 16 March 2012
Reed,
You're both right. The gaps are getting more numerous and smaller.
Robert Byers · 17 March 2012
All that is shown by these fossils is diversity of creatures.
Here and always the fossil record is not biological evidence based on biological investigation using the scientific method.
casts of creatures should not be important or needed in a biological subject.
if the only way or a needed way is to see geological sequence between these fossil types to determine evolutionary relationship then its not about biological research of the casts but geological facts.
Its been the great flaw of evolutionary biology to draw its confidence from evidence that is not from biological investigation.
One can not do biology on rocks.
theres plenty of room to see these fossils as unrelated simply having bits and pieces perfectly suited to them in a more diverse past.
Dave Luckett · 17 March 2012
No, Byers. What it shows is that animals with a mosaic of fish-like and amphibian-like basal features once existed, but not modern salamanders, frogs and newts. These animals existed in the specific window of time in which the paleontological evidence says that amphibians were separating from fish. That separation is confirmed by these fossils, as predicted and explained by evolution. Creation, which says merely that all animals were created at the same time, does not predict this, and explains none of it.
Geology and paleontology support each other, Byers, just as any reasonable person would expect, seeing as they both partake of objective fact. Nonsensical blather about how the one can't be used to support the other is simply idiotic.
dalehusband · 17 March 2012
Both Byers and Atheisto@$$hole are displaying their profound arrogance and ignorance on a galactic scale. Evolution explains perfectly the specific forms of these fossils and their locations in a way Creationism cannot. Indeed, if Creationism were valid, those fossils should never have been found at all.
Indeed, why would a Creator even bother with amphibians, you morons?
TomS · 17 March 2012
Let me preface this with the note that I am not a scientist, so I welcome corrections.
As far as I can tell, genus is defined as a convenient fairly small collection of species.
There is no objective definition of "genus" which applies uniformly across the world of life. There is little in common between genera of plants, of fungi, of insects, of molluscs, of vertebrates, etc. There is no sharp dividing line between species which are in one genus and those in another. The same is true of other taxonomic ranks like family, order, class, subfamily, subgenus, tribe. The only rank which has a more or less objective definition is species.
This is a result of the evolution of species.
John · 17 March 2012
RBH, I just looked at Clack's website. For those who don't know, Per Ahlberg was her first Ph. D. student. He's now a professor of evolutionary organismal biology at the University of Uppsala.
As for Romer's Gap, Clack collaborated with her former postdoc Michael Coates (now a colleague of Shubin's at Chicago) on this symposium paper:
Coates, M. I. and Clack, J. A. 1995 Romer's Gap - tetrapod origins and terrestriality. In Arsenault, M. Lelièvre and Janvier P. (Eds) Proceedings of the 7th International Symposium on Lower Vertebrates, Miguasha: Studies on Early Vertebrates. Bulletin de la Muséum national de l'Histoire naturelle, Paris. 17, 373-388.
As soon as I heard about Shubin's (Technically Shubin et al.) discovery of Tiktaalik, I was quite optimistic that we'd see eventually the entire transition from lobe-finned fishes to early tetrapods; Clack and her colleagues are demonstrating that quite convincingly.
John · 17 March 2012
harold · 17 March 2012
Rolf · 17 March 2012
As another non-scientist, with respect to methods of classification, identification of relatedness between species, clades, or whatever: Isn't it a fact that as far as everything we have discovered and learned about biology and the history of life on this planet, supported by facts and evidence from so many facets of science over 150 years, that life on earth is one great continuum, with everything related to everything else?
No evidence, nothing points to 'special creation' of even the most basic piece of biology. Even the most virulent of pathogens are the inevitable result of evolution, and not what according to creationist thinking would have to be God's own unique creation.
If God created them, we are commiting a great sin by fighting them. Leave HIV, Ebola, Malaria, Borelia, TBE or TBC alone to do what the Lord put them here for. Even with the mutations they are picking up all the time to make them even more sinister.
harold · 17 March 2012
apokryltaros · 17 March 2012
Jim · 17 March 2012
Atheistoclast · 17 March 2012
Just Bob · 17 March 2012
Atheistoclast · 17 March 2012
fnxtr · 17 March 2012
Eventually there will be an infinite number of infinitessimally small gaps.
DS · 17 March 2012
Richard B. Hoppe · 17 March 2012
Grrr. Take an evening and day off and it goes to Hell. I'll leave what's there, but that's it for Atheistoclas.
Henry J · 17 March 2012
Rolf · 18 March 2012
DS · 18 March 2012
Paul Burnett · 18 March 2012
Jim · 18 March 2012
The point has been made several times, but perhaps bears repeating: there is no essential difference between artificial and natural selection. Objectively speaking, the breeder is just part of the dog's environment. Anyhow, people are not the only organisms whose activities change the adaptive landscape for other organisms. Coevolution of predators and prey and parasites and hosts provide plenty of examples, not to mention sexual selection, a mechanism that produces outcomes just as artificial looking as bull dogs.
Atheistoclast · 18 March 2012
This comment has been moved to The Bathroom Wall.
ksplawn · 18 March 2012
Natural selection by itself only selects what is there to be selected among. Once there is a trait that confers some benefit, it can be acted upon by natural selection to be preserved and promoted. The novel features themselves arise through different processes.
This does not mean that natural selection halts the evolution of a species; natural selection is part of the evolution of a species. It is a pathway for changes to spread, not just a roadblock to prevent changes and keep things within some bounds other than "what works and what doesn't." Natural selection is part of the evolutionary process that drives speciation, and speciation drives the divergence at higher levels. Natural Selection is no barrier to changes in "kind," it is part of the engine.
DS · 18 March 2012
This comment has been moved to The Bathroom Wall.
DS · 18 March 2012
This comment has been moved to The Bathroom Wall.
dalehusband · 18 March 2012
This comment has been moved to The Bathroom Wall.
Richard B. Hoppe · 18 March 2012
For some reason I'm intermittently unable to move comments in the Movable Type control panel. Meanwhile please ignore Atheistoclast. Thanks!
RM · 18 March 2012
I once intended to study biology but got caught by chemistry and never made it to my intended field of study.
Leaving creationist nonsense aside, I understand that there is no strict definition of higher entities of biological classification like genera, orders, classes etc. but I have also been told by some biologists that cladistics is a way out of this dilemma. That means that one tries to classify not from exterior appearance but from common ancestry. One wellknown example is how the species man, chimpansee and gorilla are classified. Traditionally, the great apes were grouped together and man was separate. The cladist would group man and chimpansee (including the bonobo) together since they are believed to have a common ancestor separate from the gorillas.
It is of course a common situation that scientists disagree with each other but still agree that further data will resolve the conflict. I felt that this conflict in biological systematics was of a different kind, one which could not be resolved that way, and that this is a rare case in modern science.
Mike Clinch · 18 March 2012
Joe Felsenstein · 18 March 2012
Matt Young · 18 March 2012
Chris Lawson · 19 March 2012
Mike, there is no need to wonder, because while we can't do this with fossils, with bacteria we can not only demonstrate evolution of useful traits like antibiotic resistance in real time, we can show the exact chain of mutations as the proteins evolve. And it still isn't enough evidence for the creationists to accept evolution.
Paul Burnett · 19 March 2012
TomS · 19 March 2012
SLC · 19 March 2012
harold · 19 March 2012
Mike Clinch · 19 March 2012
John · 20 March 2012
Mike Clinch · 20 March 2012
TomS · 20 March 2012
Agreed.
As if one could have argued against Newton in his time (and at any time before Sputnik) that the only experimental evidence for Newtonian mechanics was only about things on Earth, and didn't prove that the heavenly bodies moved according to those same laws. Distinguish between "micromechanics" and "macromechanics".
Science has its real power in telling us about things which are not directly observed. Things which are too big, too small, too fast, too slow, too distant (in space or time), or otherwise imperceptible to our senses: atoms, electromagnetism, ...
John · 20 March 2012
Robert Byers · 20 March 2012
Paul Burnett · 20 March 2012
Tenncrain · 20 March 2012
dornier.pfeil · 20 March 2012
DS · 21 March 2012
Just Bob · 21 March 2012
John · 21 March 2012
Richard B. Hoppe · 21 March 2012
Henry J · 21 March 2012
Robert Byers · 21 March 2012
Dave Luckett · 22 March 2012
Fossils are the relicts of living things - even Byers admits that. "Casts", he says. So tell me, Byers, how can they not contain information about the living things themselves? And why should this information from fossils not be compared with information from other fossils? And where this comparison demonstrates morphological change, why should this be denied?
I know why you deny it, Byers. It's because you're a religious loon, and therefore by definition not rational. But why should a rational person deny it?
bbennett1968 · 22 March 2012
Niltava · 22 March 2012
Sigh. I don't know why I bother, but then...
Byers, you did not get my last analogy, so I'll try again. If biology cannot be studied from the perspectives of geology, chemistry etc, then tell me why
- you die if your core temperature drops too low
- an MRI scan can be used to study your inner organs
- we accept indirect means of detecting pathogens, like serology
- EEG is used to declare someone braindead
- metabolites in urine can be used to detect disease
- pharmaceuticals work
I really do not think you get the implications of what you're saying, because that would mean all of medicine is total quack. If it was true, we would not be able to tell objectively who is ill and who is not, and we would not have the faintest idea what causes disease. The most consistent of your superstitious likes admits this; they reject medicine and still claims that bad spirits and God's punishment is the root cause of all disease! At least these people are honest in their denial.
If you try really hard to think through the examples above, you might get it. I have little hope though.
To give you a helping hint; WHAT is an MRI actually measuring?
DS · 22 March 2012
OJ: But your honor, since fingerprints aren't really fingers then DNA doesn't count either. So you see, you have to throw out all of the evidence. BEsides, I don't understand any of the technical stuff anyway. You have to prove to me that it's real. I can't see DNA, so how can you use it to convict me? I know that there are real experts in the field, but if I don't agree with them you can't use them against me either.
apokryltaros · 22 March 2012
apokryltaros · 22 March 2012
DS · 22 March 2012
Robert Byers · 22 March 2012
Robert Byers · 23 March 2012
Dave Luckett · 23 March 2012
So, Byers, what you're actually complaining about is that the geological theory is used to relatively date the fossils found in the sedimentary rock, and this dating is then used to demonstrate slow change in morphology over time in the lifeforms that left the fossils.
Why do you think that dating rocks isn't the province of geology, Byers? Because it's actually the province of the Bible? You think?
DS · 23 March 2012
DS · 23 March 2012
Tenncrain · 23 March 2012
Byers, still going to show us all the fossils used within the study of evo-devo?
Didn't think so.
Still working on explaining why YECs/Flood geologists are virtually absent in geology/palentology?
Didn't think so.
Oh, still working on giving us a long detailed criticism of the Gordon Glover and Glenn Morton material???
Yea, didn't think so.
Tenncrain · 23 March 2012
DS · 23 March 2012
Robert,
Your argument seems to be that paleontology is not biology so the evidence should not be considered. Let's forget for a minute that the modern theory of evolution is also based on evidence form biogeography, biochemistry, genetics, population genetics, developmental biology and many other fields. Consider this: the bible is not geology; the bible is not biology; the bible is not science. So, if the bible is the only reason you are a YEC, you have to stop being a YEC. If the bible is the only reason you refuse to believe in evolution, you have to start believing in it. That's your own logic Robert. If you don't like it, quit using it.
apokryltaros · 23 March 2012
Just Bob · 23 March 2012
Yep, the OJ defense can extend in many directions:
Astronomy is not physics or chemistry, so what we see through telescopes can't tell us anything about the objects we see--how big they are, how far away, how hot, how old, what they're made of, or anything! Telescopes just help us see things, so all we know is what they LOOK like.
And, hey, that's true of microscopes, too... and..and Xray machines... and..WOW! police radar!
So you see, your honor...
Henry J · 23 March 2012
Does it really not occur to this guy that anything impacted by biological processes can be used as evidence in biological research?
And of course the same principle applies to any branch of science; the different branches are not studying different universes, they're studying different aspects of the same universe. Yet his remarks give the impression that he thinks biology and geology are about totally different worlds.
Just Bob · 23 March 2012
Niltava · 24 March 2012
Byers, again, you're too lazy to really care and think when others provide you with an argument. So I'll provide you with an answer then.
"Medicine is medicine" you say? And what is it then? It is a field that integrates all sciences (yes, that's right!); radiology envelops physics, pathology envelops biology and chemistry, physiology, anatomy and genetics are biological fields, orthopedics is biological and physical, environmental medicine combines geology, mathematics, physics, biology and chemistry, and so on and on and on. You may think different fields of science cannot be integrated, but clearly it can.
Now, the MRI. An MRI makes PHYSICAL measurements of the body. In simple words (I doubt you would like the complicated version) it measures PHYSICAL properties of water molecules. We then use this PHYSICAL investigation to answer our questions about the BIOLOGY of the patient (brain physiology is biology, patophysiology is biology, a brain tumor is biology). Now, if this works, WHAT IS THE **** PROBLEM about using a geological investigation to tell us anything about biology?! Noone here but you thinks this is a problem.
I suggest you approach the hospitals around you and present to them your sublime insight and logic; I think they will be quite happy they have no reasons to use MRI any longer; after all, they cunk out quite a bit of the budget....
Robert Byers · 24 March 2012
DS · 24 March 2012
SO then you are not a YEC anymore?
Malcolm · 24 March 2012
Byers,
The vast majority of the evidence for the theory of evolution has nothing to do with fossils.
This has been explained to you many times before.
Or, to put it more simply for you, you are wrong.
Scott F · 24 March 2012
apokryltaros · 24 March 2012
Niltava · 25 March 2012
Now really, you are contradicting yourself Byers.
You say it's fine to use geology now? Then i do not see the problem, except from the fact that you do not like when someone calls it a biological investigation. Call it something else then, it's just a game of words, nomenclature nitpicking. You can call it a geological investigation if you want, but it makes ABSOLUTELY NO DIFFERENCE when assessing the evidence, which is EXACTLY what I've been trying to point out to you.
What makes me absolutely flabbergasted is that you in one sentence say it's ok to use geology to make a biological case, and in another blabber incoherently about a great error??? Which error? There is no error except possibly a naming error. You could call an MRI scan "A big magically force-field creating tube" if you'd like, it would still produce great images that pinpoint tumors.
Your statement that fossils in the "wrong" strata would be evidence AGAINST evolution is exactly why evolutionary theory is a scientific theory; it is potentially falsifiable. Creationism is not, hence it is no science.
Robert Byers · 27 March 2012
bbennett1968 · 27 March 2012
Malcolm says "Robert, you are WRONG."
Robert says, "Malcolm, are you saying I make a persuasive case?"
Ben says, "Robert, you are an idiot."
Robert Byers · 27 March 2012
Dave Luckett · 27 March 2012
It's that fractured inability to see the point, that purblind doltishness of it that makes it almost endearing.
Yes, Byers, dating rocks is a "geological thing". Good to have you admit it. And these dates apply also to the fossils that are in the rocks. And the morphology of those fossils changes according to the dates of the rocks they're found in, as dated by geology.
The closer we come to the present, as determined by geology, the more the fossils generally resemble the life forms we know. Which is what evolution says should happen, and creationism says shouldn't happen. So this is evidence for evolution, and against creationism.
Do go away, you silly little man.
Robert Byers · 27 March 2012
Niltava · 27 March 2012
No, it does not matter at all. It is no less a evidence for evolution. Only you here thinks so.
Explain to me WHY it is no evidence, NOT just saying it is not a biological investigation, tell me exactly why it is wrong to use a geological investigation. Don't whine and say "you can't do that" cause we think we can. Tellu us why we can't use it as evidence. Please do it coherently.
Niltava · 27 March 2012
It would give you more credibility if you gave an answer to my MRI analogy. How is it possible to use a nonbiological investigation to study biological aspects? You think it is not possible because to you, life is some special, supernatural phenomenon that cannot be studied in the same way as all other things. And you, as many have pointed out, are wrong.
Henry J · 27 March 2012
Fossils in the same strata can be used to illustrate the nested hierarchy that was present in that time period. IMO that would be part of the relevant evidence.
Anyway, fossils are part of the evidence. Funny how science deniers go around saying that this or that part of the evidence doesn't by itself prove the entire theory (or misspelled words to that effect). Well duh - of course one piece of evidence doesn't prove everything all at once; the reason a theory is accepted is because of the overall patterns formed by all the relevant evidence that has been examined.
Tenncrain · 27 March 2012
Henry J · 27 March 2012
apokryltaros · 27 March 2012
Just Bob · 27 March 2012
And you want to teach "weaknesses" of evolution, but you can't even list any for your own "theory".
Just Bob · 27 March 2012
Should we do it for you?
John · 27 March 2012
John · 27 March 2012
apokryltaros · 27 March 2012
DS · 28 March 2012
Robert,
You are wrong. Paleontology is not geology, it is the study of ancient life. It is a field of biology. If you claim that it is not, you are lying. Stop doing that. You are giving your god a bad name. Why are you so afraid of paleontology? What is so awful about fossils that you can't even admit that they are evidence? Oh, that's right, they completely disprove all of your YEC nonsense and are completely consistent with evolution. You must deny all of the evidence, preferably by renaming it and saying it doesn't really count.
Here is a news flash for you Robert, no one is being fooled by your childish word games, Everyone can see that you are just being a parrot. Someone told you that religion was not science, so you are trying to play the same game by claiming that fossils are not biology. The difference is that they were right and you are wrong. You can say it a thousand times, and probably will, but that still don't make it right. But keep it up. Any rational person will see that you represent the wrong side of the argument.
And of course, as many have pointed out, fossils are only one line of independent evidence for evolution. At this point, probably not even the most important type of evidence. Just one more reason why you should shut your mouth and quit spewing ignorance. You have no explanation for the genetic evidence or the developmental evidence or anything else. All you have is word games and denialism.
Now, for the last time, religion is not science. YEC is dead, deal with it.
Malcolm · 28 March 2012
Henry J · 28 March 2012
Robert Byers · 29 March 2012
Robert Byers · 29 March 2012
Just Bob · 29 March 2012
Let's keep it real simple: Why are marks made by living things, including the actual fossilized BONES of living things, not "evidence" about living things?
Tenncrain · 29 March 2012
DS · 29 March 2012
DS · 29 March 2012
apokryltaros · 29 March 2012
Robert Byers · 30 March 2012
Robert Byers · 30 March 2012
Robert Byers · 30 March 2012
DS · 30 March 2012
apokryltaros · 30 March 2012
apokryltaros · 30 March 2012
apokryltaros · 30 March 2012
DS · 30 March 2012
Just Bob · 30 March 2012
Just Bob · 30 March 2012
apokryltaros · 30 March 2012
Tenncrain · 1 April 2012