F Rosa Rubicondior: Biology
Showing posts with label Biology. Show all posts
Showing posts with label Biology. Show all posts

Tuesday 20 February 2024

How Science Works - Correcting Earlier Mistakes With Modern Technology


Latest News and Views from University College Cork (Coláiste na hOllscoile Corcaigh)

There are few things that creationist like more than reports of 'soft' tissues being found in ancient fossils, because they imagine this 'proves' the fossils are much younger than palaeontologists claim, and places them well within the 10,000 years they believe Earth has existed for. It's nonsense, of course, because fossilised 'soft' tissues are not the same as actual soft tissues since, under the right circumstances, there is nothing to prevent soft tissue being mineralised by the same processes that hard tissues are mineralised. The results are not soft; they are hard, mineralised fossils. The term 'soft tissue' simply relates to what they started out as, not what they ended up as.

That point is probably too subtle for most creationists to appreciate.

Given the propensity of creationist frauds to misrepresent the science to their dupes, it's perhaps surprising that they don't wave the fossil of Tridentinosaurus antiquus. as 'proof' of a young Earth because it was believed to have its skin preserved and was thought by some to be an example of the rare preservation of soft tissue in a fossil.

However, a paper in Palaeontology a few days ago, not only destroys that notion, but shows how the scientific method eventually corrects mistakes and even deliberate hoaxes, in much the same way that the scientific method eventually exposed the Piltdown hoax as a forgery.

This paper shows that what was interpreted as fossilised skin was actually black paint. Whether this was a deliberate attempt to mislead or simply an attempt to make the fossil stand out from the surrounding rock matrix in which it is embedded may never be known, but one thing of which we can be sure, is that it isn't fossilised skin, so there is no mystery for science too explain.

The fossil is embedded in volcanic rock, so the 'mystery' was how the skin survived the high temperatures involved in the production of the rock, and various theories were proposed for this, including the lizard-like reptile sheltering in a crack in the rock.

How the 'forgery' was exposed is the subject of the paper in Paleontology and a news release from the University of Cork, Ireland:

Friday 16 February 2024

Creationism in Crisis - How The Fossil Record Provides Evidence For Evolution - No Magic Needed


Desert sand dune landscape of the Upper Cretaceous Djadokhta/Baruungoyot Formations. Foreground: the large-bodied monstersaurian lizard Estesia mongoliensis predating on the enantiornithine bird Gobipteryx minuta.

Illustration by Nathan Dehaut
A Lighthouse in the Gobi Desert | Natural History Museums of Los Angeles County

We are regularly told by creationists who have either been fooled by a lie, or are trying to fool us with one, that biomedical scientists are increasingly rejecting the Theory of Evolution and replacing it with the notion of intelligent design.

This was, of course, the aim of the Discovery Institute's 26-year-old, 5-year[sic] strategy detailed in The Wedge to insert Bible literalism into mainstream science, apparently believing that for the first time in the history of science, a well-established scientific theory is going to be replaced by a an evidence-free superstition based on misrepresentation of the data and including unproven supernatural entities doing magic.

Intelligent design creationism, of course, doesn't meet the basic criteria to be called a science, which is why any scrutiny of the relevant scientific literature will find no hint that the TOE is inadequate for explaining the data or that magic explains it in a more scientifically satisfying way. Indeed, as I repeatedly show in these blog-posts, virtually every piece of scientific research casually refutes creationism by revealing the evidence and not a single peer-reviewed biomedical science paper ever concludes that intelligent design is the only way to explain the observations.

As Michael J Behe was forced to admit in the Kitzmiller case, "There are no peer-reviewed article by anyone advocating for intelligent design supported by pertinent experiments or calculations which provide detailed rigorous accounts of how intelligent design of any biological system occurred". And that situation has not changed since Behe effectively sank the Wedge Strategy with that grudging admission under oath in an American court. Instead, we find papers like this technical one in which a team of researchers led by Dr. Hank Woolley, a Postdoctoral Research Fellow at the Dinosaur Institute, Natural History Museum of Los Angeles County, and the Department of Earth Sciences, University of Southern California, Los Angeles, California, discuss and evaluate the degree to which exceptional collections of fossils, such as those found in the Gobi Desert of Central Asia can influence our understanding of evolutionary relationships between fossil groups - what they term the lagerstätten effect .

The team have explained their research in a news release from the Natural History Museums of Los Angeles County:

Thursday 15 February 2024

Creationism in Crisis - The Inner Ear Of A 6 Million-Year-Old Hominoid Fossil Gives A Clue To The Evolution Of Bipedalism In Humans


How Did Humans Learn to Walk? New Evolutionary Study Offers an Earful

To walk upright successfully needs a fully functioning balance organ in the inner ear, as anyone suffering from Ménière's disease will testify, so the study of the origins of bipedalism in the remote ancestors of humans needs to take into account changes in the inner ear that would facilitate it.

Humans and our closest relatives, the great apes and the simians, display a range of locomotion but only humans are normally fully bipedal, although chimpanzees can use bipedal locomotion when carrying a load for example.

The monkeys normally run along branches on all fours, balanced on top of them and jumping from branch to branch; the apes hang beneath the branches in locomotion known as brachiation, but humans are ungainly in trees and prefer bipedal locomotion on the ground. The question is, when did this ability evolve in our ancestry?

We can be sure our hominin ancestors the Australopithecines, were fully bipedal because we have a record of their footprints in volcanic ash at Laetoli, and their lower limbs and feet were almost indistinguishable from those of Homo sapiens. 'Lucy' (Au afarensis) was probably mostly bipedal but may have taken to trees for safety and possibly to sleep on constructed platforms like chimpanzees do. The evidence of injuries to her fossilised skeletal remains suggests she may have died by falling out of a tree.

To investigate this stage in our evolution a group of researchers, led by Professor Xijun Ni, which included Yinan Zhang, a doctoral student, both of the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences (IVPP), and Terry Harrison, a New York University anthropologist, used 3-dimensional CT scanning to examine the inner ear of a 6-million-year-old fossil ape, Lufengpithecus, unearthed in China’s Yunnan Province in the early 1980s, and compared it to the inner ear of other living and fossil apes and humans from Asia, Europe, and Africa.

The formation the fossil was found in has been previously dated magnetobiostratigraphically to about 6 million years. This technique depends on the record of periodic changes in Earth's polarity trapped in magnetic particles in sedimentary rocks and by recording the microfossils such as pollen associated with these changes:

Wednesday 14 February 2024

Malevolent Design - Another Arms Race Between A Parasitic Worm And Its Host - Or is It Just Unintelligent Design?


Cane Toad, Rhinella marina
A secret war between cane toads and parasitic lungworms is raging across Australia

The subject of parasitic arms races throws creationists into a bout of cognitive dissonance from which they can only emerge with a hefty dose of double-think and self-deception, telling themselves that it's perfectly logical to hold two diametrically opposite and mutually contradictory views simultaneously, like believing that the term 'circle' describes a spere but the term 'square doesn't describe a cube.

They need to believe that, whilst it is central to their dogma and the belief on which all their god of the gaps and false dichotomy fallacies relies - that there is only one creator god capable of whatever it is they are waving as 'proof' or its existence, and at the same time believing that parasites were created by a different creator, over whom their omnipotent god has no powers and who goes toe to toe with it in parasite-host arms races.

Sadly for creationists, they were denied the argument concerning a second creator by their guru and Deception Institute flunky, Michael J Behe, who used the evolution of parasites like Escherichia coli and Plasmodium falciparum (the malaria parasite) as 'proof that their god is the intelligent designer behind the 'design' of all living things.

So, let's do what Behe unwittingly did and remove the second, evil designer from the equation, and see where it leads.

A case in point is the recently discovered arms race between the Australian cane toads and the lung worm parasite that infests their lungs:

Creationism in Crisis - Hundreds of Fossils From France From 470 Million Years Before 'Creation Week'


New fossil site of worldwide importance uncovered in southern France - UNIL L'ACTU

Artistic reconstruction of the Cabrières Biota.
Credit: Christian McCall (Prehistorica Art).
The news just keeps getting worse for creationism as the relentless scientific refutation of all their sacred dogmas continues unabated.

Today, it's the turn of palaeontologists from the Faculty of Geosciences and Environment at the University of Lausanne (UNIL), Switzerland, who, together with international colleagues, have just announced the discovery of a large collection of exceptionally well preserved fossils in the Lower Ordovician formation at Montagne Noire, in the Hérault department of France. The Lower Ordovician deposits were formed between about 485.4 and 470 million years before creationists believe Earth was magicked out of nothing.
Tell me all about the Lower Ordovician period particularly in the Montagne Noire, in the Hérault department of France, including how its age was determined. The Lower Ordovician period is a significant geological epoch characterized by a diversification of marine life, particularly marine invertebrates such as trilobites, brachiopods, and mollusks. It spans from approximately 485.4 to 470 million years ago. The Lower Ordovician is part of the larger Ordovician period, which is divided into three stages: Tremadocian, Floian, and Dapingian.

Montagne Noire, located in the Hérault department of France, is a region renowned for its Lower Ordovician sedimentary rocks, which provide valuable insights into the Earth's geological history during this period. The geological formations in Montagne Noire contain a wealth of fossils and sedimentary structures that have been studied extensively by geologists and paleontologists.

Monday 12 February 2024

Creationism in Crisis - Now It's Fossils of Air-Breathing Fish From Australia - From 380 Million Years Before 'Creation Week'


A 380-million-year-old predatory fish from Central Australia is finally named after decades of digging

It seems every day brings a new scientific refutation of creationism that the frauds who lead the cult and feed it disinformation need to keep hidden, or at least give the half-baked strategies for ignoring. The scientists are lying; the scientists get their dates wrong; no matter what the evidence shows, God's holy word trumps it; if you weren't there to see it, it probably didn't happen.

Maybe creationists can be satisfied with such obvious logical fallacies and evidence free assertions, but normal people will allow the evidence to lead their opinions, not the misrepresentations and lies of frauds who know nothing of the subject.

And what better evidence that the world wasn't created out of nothing by magic in a few days about 10,000 years ago, than yet more evidence that there were creatures like fish living on Earth 380 million years before creationist mythology says the magic creation happened; creatures like this fossil air-breathing, lobe-finned fish found in Devonian rocks in Central Australia.

And to make matters worse for creationists, this fish was a close relative of one of the lobe-finned fish that evolved into the terrestrial tetrapods from which all terrestrial vertebrates are descended. Taxonomists have now named this fish, Harajicadectes zhumini.

Sunday 11 February 2024

Creationism in Crisis - Social Learning Is Part of Beaked Whale Culture - Just Like Humans


Surprising Behavior in One of the Least Studied Mammals in the World - SDU

Continuing where I left off with the account of how orcas (killer whales) form distinct cultures based on food, hunting strategies, location and dialect, which parallel human cultures in many way, we now have evidence that at least one of the 24 known species of the beaked whales, Baird's beaked whale, form cultural groups, and that another 'human' trait - social learning - is involved in the formation of these cultures.

Creationists, of course, continue to insist that only humans form cultures and have the social ethics that hold them together because they were specially created in a way that makes them materially different to all other animals, and by the circular reason that often typifies creationist arguments, this proves they were specially created by a god who holds them in the highest esteem.

s But as we are learning, almost all the traits creationists try to claim are uniquely human and therefore proof of our special creation, are turning out to be common to many other species, especially mammals, and so are evidence for common ancestry and evolution by descent with modification.

The little-known beaked whale, a relative of orcas and dolphins, has recently been observed changing its habitat and hunting strategy by a process of social learning. This is the same process by which growing children adopt the social norms and customs of their culture and how people from other cultures can assimilate into unfamiliar cultures. Essentially it means observing others and memorizing what they do in any given situation.

This observation was made by researchers from the University of Southern Denmark (SDU) led by Olga Filatova, a whale expert and postdoc at Department of Biology and SDU Climate Cluster. She led the study which showed that some pods of orcas in the Pacific have occupied the same area since the last Ice Age glacial maximum, 20,000 years ago when they occupied warmer refugia and adopted them as permanent territories. The same study showed how orcas form distinct 'ecotypes' which are genetically isolated from other ecotypes by cultural barriers to interbreeding.

For the beaked whale study, the team observed a population of Baird's beaked whales, which has unexpectedly been found near the coast and in shallower waters than previously observed.

Their work has been published, open access, in the journal Animal Behaviour and is explained in a SDU press release by Birgitte Svennevig:

Saturday 10 February 2024

Creationism in Crisis - How Killer Whales Were Evolving Cultural Groups - 20,000 Years Before 'Creation Week'


Researchers find 20,000 years old refugium for orcas in the northern Pacific - SDU
The northern Pacific near Japan and Russia is home for several different groups of orcas. They have no contact with each other, do not seek the same food, do not speak the same dialect, and do not mate with each other. Some are the descendants of a pod that moved there during the last Ice Age.

Any study of whales, such as dolphins and they larger cousins, the orca's or killer whales will quickly dispel one of the myths creationists use to try to justify their absurd belief that humans are somehow materially different to the rest of life on Earth in a way which isn't just because we are a variation on the general mammalian theme with enough distance between us and related species to justify a separate taxon, because we were specially created - humans form cultures and have languages and traditions, etc.

Of course, it's not just the whales that have cultures and languages; chimpanzees and bonobos and other primates also have distinct cultural groups that differ significantly from one another, but this article deals specifically with orcas and the research which has shown that they moved into Ice Age refugia at the last glacial maximum, some 20,000 years ago, and some have slayed there ever since.

The article also illustrates a problem of modern taxonomy in how to define a species with hard and fast rules when the distinction in reality is fuzzy. Some of the pods studied form isolated cultural groups that seek different foods to the others, which speak a different dialect, move in a specific area, and never interbreed. This cultural barrier to hybridization is as much a barrier as is the different plumage and mating rituals that are the pre-zygotic barriers to interbreeding that justify classifying many related birds as distinct species because the barriers ensure an isolated gene pool in species that could successfully interbreed and do so in captivity. Killer whales exist in many pods with cultural barriers to interbreeding and so form isolated gene pools, yet they are regarded as a single species.

To overcome this problem, biologists have classified the different killer whale pods into 'ecotype', but it is this genetic isolation that enables genetic analysis to determine how long the pod has been isolated.

A research team led by whale biologist, Olga Filatova, of the University of Southern Denmark recently published an open access paper in the journal Marine Mammal Science showing how environmentally stable marine regions may have preserved refugial populations of the killer whale that retained historical genetic and cultural diversity. These whales are believed to have moved into the warmer refugia during the last Ice Age.

The team's work is explained in a University of Southern Demark (SDU) press release by Birgitte Svennevig:

Friday 9 February 2024

Unintelligent Design - The Heath Robinson Way Legumes Get Nitrates


Mechanism of Plants Obtain Nitrogen by Supplying Iron to Symbiotic Bacteria | Research News - University of Tsukuba

Creationism's 'intelligent' designer is nothing if not inventive. In fact, it's so inventive that it keeps on reinventing things it's already invented and designing new ways to do things it's already designed a way to do. It's almost exactly like it has no way of remembering what it did yesterday and using those designs and inventions today - a bit like a motor-car manufacturer who reinvents the wheel, or the steering mechanism every time it designs a new model.

Take, for example, the way most plants obtain the essential nitrates they need to make proteins. Nitrogen is abundant in the atmosphere (about 79%) where it exists as diatomic molecules N2, in which form plants can't assimilate it. Instead they depend on soil bacteria, the 'nitrogen-fixing' bacteria such as Azotobacter and Clostridium which convert N2, into ammonium (NH4+ which forms salts with other minerals in the soil, in which form it can be taken in through the roots of plants. Apparently, it was too simple to give plants the same metabolic pathways that the nitrogen-fixing bacteria have so they could make their own ammonium, so a more complex and less energy-efficient way to get nitrates into plants had to be invented.

A small amount of ammonia (NH3 is also produced by the action of lightening on atmospheric nitrogen and this, together with nitrates produced by industrial pollution is dissolved in rainwater and finds its way into the soil. Other bacteria, fungi and other soil organisms also release nitrates from decaying plant and animal matter in the soil.

Unintelligent Design - How A Design Blunder Causes Inflammatory Diseases, Especially In Later Life


Faulty DNA disposal system causes inflammation - Salk Institute for Biological Studies

In another example of the ramshackle Heath Robinson design process that created humans, scientists today published their findings that show how when a cell process goes wrong, as it frequently does, the result can be a serious health condition, causing suffering and unhappiness.

And of course, it’s another example of how we can tell humans weren't intelligently designed by an omnibenevolent god who wants to minimise the suffering in the world, but by a mindless, amoral natural process that has no option but to settle for the sub-optimal as long as it’s better than nothing.

The discovery, by researchers at the Salk Institute and their colleagues at UC San Diego , is the way when mitochondrial DNA (mtDNA) goes wrong and the cell tried to dispose of it, some of it leaks out into the cell, the cell’s immune system treats it like the DNA of a parasitic organism and sets up an immune response which caused inflammation.

Given the origin of mitochondria in our Heath Robinson contraptions we call cells, this is hardly surprising since mitochondria started out, probably as the free-living bacterial prey of another prokaryote, possibly an archaeon. They then became symbiotic, providing the cell with free ATP in return for protection and nutrients in the form of sugar, water and oxygen. Because they need to provide a handful of enzymes to do this with, and they are self-replicating, they retained a small amount of their original DNA while giving up most of it to the host cell's nucleus.

Thursday 8 February 2024

Creationism in Crisis - A New Endogenous Retrovirus Caught In The Act Of Invading a Genome


A rare recent case of retrovirus integration: An infectious gibbon ape leukemia virus is colonising a rodent’s genome in New Guinea - Leibniz Institute for Zoo and Wildlife Research

Researchers have discovered that a retrovirus is currently in the process of invading the genome of a rodent in New Guinea. This will add to the extensive list of known endogenous retroviruses. The virus, which appear to be harmless to the rodent - a mosaic tailed rat of the Melomys genus - is an infectious virus that causes leukemia in gibbons.

A retrovirus is an RNA virus that 'hides' in its host's DNA by inserting the DNA template for its RNA, using the enzyme reverse transcriptase that is coded for in its RNA. Once inserted it is replicated by every daughter cell. If it is inserted into the DNA of a germline cell, it can be passed on to the next generation.

Endogenous retroviruses (ERVs) are common in the genomes of all multicellular organisms and even some single-celled organisms, and as such constitute a large proportion of the non-coding or 'junk' DNA. A few may have been exapted for other purposes, but most are simply strands of viral DNA with a few mutations that broke them and rendered them harmless way back in our evolutionary history.

ERV's provide some of the most compelling evidence for common descent, especially since they appear at the same locus in the genomes of almost all members of a clade such as the vertebrates, including fish ancestors or the terrestrial vertebrates. The probability of the same ERV with the same mutations in in the same genetic locus to make it look like they form nested hierarchies, is vanishingly small, yet they do it over and over again.

The fact that they are present in all members of the same major clade tells us they must have been present in the last common ancestor of that clade, so they are a double embarrassment for creationists. They are both evidence of descent with modification and that there was no intelligence in the design of our genomes, because an intelligent designer would have no reason to include broken viral DNA which adds nothing by way of functionality yet must be replicated in every cell.

Wednesday 7 February 2024

Unintelligent Design - How Scientists Are Overcoming The "Designer's" Incompetence


Systemic lupus erythematosus
World-first discovery may enable an effective long-term lupus treatment - Monash University

Readers may recall my recent article on Lupus and why women are nine times more likely to suffer from it than men, because the epigenetic process for switching off genes on their X-chromosome sometimes goes wrong and produces proteins that induce an immune response to their own tissues.

From a creationist perspective, this can only be for one of two reasons: either the designer was incompetent, or this was by design. The choice being either incompetence, or malevolence and misogyny.

Now a team of researchers at Monash University, Clayton, VIC, Australia, have reported success in finding a way to overcome this design defect - which begs the question: if scientists can do it, why couldn't an omnipotent intelligent designer? Could the answer be that the human immune system was not designed by an omnipotent, intelligent designer, but is the result of a mindless, utilitarian process that inevitably produces sub-optimal 'designs' that can't be scrapped and redesigned?

But that is the kind of thought that would cause panic in the mind of most creationists because it would raise the terrible spectre of wondering if they could be wrong.
The Australian team have just published their results, open access, in Nature Communications. They are also explained in a Monash University news release:

Tuesday 6 February 2024

Unintelligent Design News - A Newly-Discovered Virus-Like Particle That Doesn't Appear to Do Anything Other Than Replicate Itself


Figure 2.

Obelisks encode putatively well-folded proteins
a) Obelisk open reading frame 1 (Oblin-1) is predicted (total mean-pLDDT ± SD = 83.8 ± 13.4, see methods) to fold into a stereotyped N-terminal “globule” formed of a three alpha helix (orange) bundle partially wrapping around an orthogonal four helix bundle, capped with a beta sheet “clasp” (blue, globule mean-pLDDT = 90.1 ± 8.7), joined by an intervening region harbouring the conserved domain-A (magenta) with no predicted tertiary structure, to an arbitrarily placed C-terminal alpha helix. “Globule” emphasised on the right. b) a to-scale (secondary structure) topological representation of Oblin-1 with the “globule” shaded in grey, and the domain-A emphasised with this bit-score sequence logo (see methods). c) Obelisk Oblin-2 is confidently predicted (mean-pLDDT = 97.1 ± 4.6 ) to fold into an alpha helix which appears to be a leucine zipper. Sequence logo of an “i+7” leucine spacing emphasised in red, with hydrophobic “d” position residues emphasised in yellow (expanded in Supplementary Figure 4b). d) homo-multimer predictions of Obelisk-alpha Oblin-2. top: dimer (mean-pLDDT = 94.6 ± 0.6), bottom: trimer (mean-pLDDT = 93.6 ± 0.6). Side-on representations of homomultimers shown with numbers of inter-helix salt-bridges (see Supplementary Figure 5).
A new virus-like entity has just been discovered – ‘obelisks’ explained

At least with most of creationism's putative 'intelligent' designer, there is something that they appear to be for, other than simply reproducing themselves - even if it is, in the case of viruses and bacteria, increasing the suffering in the world by making other organisms sick.

But scientists have just discovered a small particle that seems to be in the edge of life, less so even than a virus, which doesn’t appear to do anything other than replicate, although it seems to need bacteria in which to do this. It’s not clear what harm it does to its bacterial host or even if it has some symbiotic function. But it appears to be almost everywhere, especially in our mouths and gut, where it appears to have speciated into several different forms. The team have named it 'obelisk' because it forms a rod-like shape.

It was discovered by a team of Stanford University researchers led by Andrew Z. Fire, a previous recipient of the 2006 Nobel Prize for Physiology or Medicine who have reported to have 'identified 29,959 Obelisks (clustered at 90% nucleotide identity), with examples from all seven continents and in diverse ecological niches'. Their report has been provided with free access ahead of peer-reviewed publication, in the preprint server, bioRxiv.

The question remains, what do these particles do exactly and are they potentially harmful, or are they beneficial in some way? At least one of their hosts in which they replicate is one of the bacteria responsible for the plaque on our teeth that is responsible for dental caries and gum disease that can result in lost teeth, Streptococcus sanguinis.
Like most viruses, obelisks are a single, circular strand of RNA, but unlike viruses, they don't have a protein coat. They have one and maybe two genes which code for proteins named 'oblins' which are unrelated to any other known proteins. In this respect they differ from other recently (1970) discovered free-living strands of RNA called viroids, which don't have any recognisable genes but are known to cause serious diseases in plants.

In the following article, reprinted from The Conversation under a Creative Commons license, Professor Ed Feil, Professor of Microbial Evolution at The Milner Centre for Evolution, University of Bath, explains the significance of this discovery. His article is reformatted for stylistic consistency:

Unintelligent Design - How Scientists Are Learning to Do What Creationism's 'Intelligent' Designer Found Too Difficult - Or Didn't Want To Do!


The proteins needed to create limb progenitor cells are marked with different colors under a microscope.
Images: Yuji Atsuta/Tabin lab
The Surprisingly Simple Recipe for Starting to Grow a Limb | Harvard Medical School

Visit any site of a supposed Marian miracle, such as Lourdes, now selling 'miracle cures' that almost never work and those that do can be attributed to the medication the pilgrim was receiving prior to the visit, or to spontaneous regression, the placebo effect or a psychosomatic condition, and you may find lots of crutches supposedly left there as testament to the cure of mobility disorders, but what you will never find is the artificial limb discarded by someone who had a spontaneous regeneration of an amputated limb.

Or visit any of the lucrative travelling, carefully stage-managed 'faith healing circuses' where people appear to be 'cured' of all manner of ailments at the touch of a 'healer', who, for perhaps obvious reasons, never works in a hospital, and you will never witness the regeneration of a limb, or even part of a limb. Not even a finger or toe.

And before some-one cites, the 'Miracle of Calanda', this is such an obvious hoax that it's a miracle anyone believes it.

Despite having allegedly created a universe from nothing and all living things from dirt, creationism's god appears to be incapable, even with the help of his miracle-working mother, to be able to regrow a human limb.

The problem is one of the designer's own making (if you believe creationists) because it would involve the epigenetic resetting of the cells at the end of the stump, so they become stem cells again, capable of making all the different specialist cells in a limb, like bone, muscle, skin, nerves and blood vessels and growing to the right shape in the right place. That was a once-only ability in the developing embryo.

Epigenetics, as I have written about many times, is necessary because the cells of a multicellular organism replicate the same way our single-celled ancestors did - by replicating the entire genome every time in every daughter cell. But the benefit of multicellularity is that cells are specialised so only need a few genes, not the entire genome and having the wrong genes active in a specialist cell would be detrimental, so most of them need to be switched off by the epigenetic system. A problem which could have been avoided by any omniscient, omnipotent designer by just replicating those genes that were going to be needed by the specialist cells, but not something a mindless, natural process with no foresight, no reverse gear and no means of scrapping a bad design and starting again, could have avoided.

And yet medical scientists investigating the problem believe they have discovered the basic principles involved, which turn out to be "surprisingly simple", so well within the capabilities of even creationism's rather limited god.

The scientists, led by Harvard Medical School geneticists, have published their findings in an open access paper in a Cell Press journal, Developmental Cell and explain it in a Harvard Medical School news release by Stephanie Dutchen:

Sunday 4 February 2024

Creationism in Crisis - A Strange Shaped Tree 360 Million Years Before 'Creation Week'.


Enigmatic fossil plants with three-dimensional, arborescent-growth architecture from the earliest Carboniferous of New Brunswick, Canada: Current Biology

Creationism's designer is not known for creating a design then sticking to it. If you believe creationists, it has designed something like 500,000 beetles, for example, and, although they all do basically the same thing, hundreds of different trees.

And, if you believe creationist mythology, it created almost everything on Earth, hundred, even thousands of millions of years before it created the small flat planet with a dome over it, centred on the Middles East. Sadly, the Bronze Age story-tellers who wrote about it were oblivious of what had been living 360 million years earlier in the Tournaisian age in what is now New Brunswick, Canada, so said nothing about it in their tales. They said nothing about Canada either for that matter, because they were ignorant of anywhere outside their small area of the Middle East, as can be seen from the naive way they describe their world as they imagined it.

Had they been better informed though, they might have mentioned one of the more bizarre tree designs which consisted of a straight trunk about 15 feet tall, with long thin leaves radiating out from the top third and measuring about 18 feet in length, the whole thing resembling a giant green bottle brush. It doesn't appear to have had any branches.

Fossils of this tree have been described by an international team led by Robert Gastaldo of Colby College in Waterville, Maine, USA in collaboration with Matthew Stimson and Olivia King of the New Brunswick Museum, Saint John, and Saint Mary's University in Halifax, Nova Scotia, Canada, and others.

Their work is published, open access, in Current Biology and described in a Cell Press article reprinted in Science Daily:

Saturday 3 February 2024

Unintelligent Design News - Why Women Are More Prone To Lupus Than Men - Evolution, Or Does Creationism's God Just Hate Women More?


The classic 'butterfly rash' of systemic lupus erythematosus (SLE)
Lupus and other autoimmune diseases strike far more women than men. Now there's a clue why

In my days as an operational paramedic, I once had to move a 26 your old women to hospital because lupus had made her so ill her blood pressure was below the safe level to maintain her renal function.

It was so low I couldn't even sit her up to carry her down stairs without her losing consciousness, so I had to run a couple of units of IV fluid into her to bring it up enough to make it safe to move her. She really was profoundly ill and at death's door. But such was the nature of the profession that, having delivered her safely to hospital and handed her over to the care of doctors and nurses, that was the end of my role in her care, so I never heard the outcome.

The autoimmune condition, lupus erythematosus, is caused by a malfunction of the immune system in which something triggers it to turn against the sufferer's own body instead of the invasive pathogens from which it has evolved to protect us. Although, of course, a creationist would hotly dispute the idea that a system like our immune system evolved at all, and would insist that it was intelligently [sic] designed by their favourite, evidence-free, supernatural deity without whom nothing can be created, presumably because they believe chemistry and physics don't know how to behave without a magic god telling them.

But an intelligently-designed immune system would only malfunction and turn against the person it is supposedly designed to protect if it were either incompetently designed or malevolently designed and is doing what it was designed to do - randomly increasing the suffering in the world. The evidence is that lupus is far more common in women than in men by a ratio of 9:1, which begs the question, does the designer just hate women more than men or was he more diligent when designing men's immune system then when designing women's?

The answer, as anyone who understands anatomy and physiology and particularly, evolution, will tell you, is that as an evolved system, we can expect compromises and a lack of perfection because evolution is a utilitarian process with no foresight and no reverse gear, so we are stuck with a sub-optimal immune system that evolved in an ancient ancestor, maybe even a pre-vertebrate ancestor. Certainly, all known vertebrates have one, and some, like that of bats, is far superior to ours.

Now a team of researchers at Stanford University School of Medicine, Stanford, CA, USA have worked out why lupus is far more common in women than men. Ther results are published, open access, in Cell and explained in a Stanford Medical news release. But first, a little AI background:

Malevolent Designer News - Creationism's Divine Malevolence Has Just Released An E. Coli Upgrade With Added Malice


New and highly infectiousE. coli strain resistant to powerful antibiotics - University of Birmingham

Escherichia coli is a pathogenic bacterium that is loved by creationists because they have been taken in by Michael J. Behe's book, Darwin's Black Box, that made him a millionaire because so many creationists bought it (though few appear to have read it) and which they love to wave around as 'proof' that the locally popular god exists.

Behe, a leading light in the Deception Institute, which was set up to try to win converts for fundamentalist, Bible literalist Christianity, by spreading disinformation about science, had argued, falsely, that the flagellum of E. coli must have been intelligently designed, since all the components need to be present for it to work (the 'irreducibly complex' fallacy) and it is too complex to have evolved in a single step because, so he claimed none of the components on their own could have given an advantage for natural selection to select for (which of course ignores genetic drift as a cause of evolution).

What Behe neglected to do was tell his readers that almost all the components of the flagellum and the proton pump that drives it, were present in a structure called the Type III Secretory system with which bacteria bind themselves to their host and kill them, and this could easily have evolved from simpler beginning over the billions of years that bacteria were evolving into their present forms.

Since its publication, Behe has been repeatedly told of the errors in it, and as a professional microbiologist, he should be aware of the growing body of research explaining how the E.coli flagellum evolved1,2, 3, 4, 5, yet he refused to correct his errors in later editions and continues to promote and defend the misinformation in it, whilst pocketing the royalties from sales, in a classic case of bearing false witness.

Wednesday 31 January 2024

Creationism in Crisis - Evolution Of The Human Imune System - By Repurposing An Existing Protein


The Joining chain (J chain) that helps bind and regulate the subunits that make up antibodies was evolutionarily co-opted by the human immune system from another biological process, according to a study by researchers from Penn State, the University of Maryland and the University of Chicago. The J chain, shown here in purple, assembles and stabilizes, from left, immunoglobin A (IgA) and immunoglobin M (IgM) antibodies. It is also required to move IgA and IgM across the mucus-producing tissue lining body structures with external exposure, like the intestine, nasal cavity and lungs.

Credit: Ttsz/Getty Images.
Evolutionary origin of mysterious immune system molecule in humans revealed | Penn State University

The human immune system is a problem for creationists who insist that their putative creator god designed humans perfectly but didn't create pathogenic parasites, which were created later by another creator called 'Sin' because of 'The Fall' after which this 'Sin' thing was free to create everything that increases the suffering in the world, so the question that throws creationists into confusion is when was the human immune system created?

If it was created before 'The Fall' then their designer god was planning for 'The Fall' all along and Adam & Eve had no choice but to comply with this god's plan for them, so there was no disobedience; just compliance with the plan.,

If, on the other hand, the creator had to upgrade its design later to protect its creation from pathogens, then it had failed to anticipate 'The Fall' so can't be omniscient.

And, since pathogens can and do get passed our immune defences, then a perfect, omnipotent creator did not design the immune system because it fails to work as designed, or 'Sin' can outwit it.

And now creationists have another problem, especially those who have been fooled into believing there is evidence of intelligent design to be found in 'irreducibly complex' structures and processes, because the simple biological explanation for such structures and processes is that they are composed of elements that originally evolved for other purposes and were later exapted for a novel function as part of the 'irreducibly complex' structure. For example, almost all the elements of the bacterial flagellum are to be found in the Type III secretion system (T3SS) which bacteria used to bind themselves to their potential host, but motility was such an advantage that the T3SS was repurposed for a flagellum with a few additional proteins and a slight modification of others to improve its efficiency.

Two of the components of the immune system are protein complexes which are the antibodies produced in response to infection by pathogens. These are the immunoglobin M (IgM) and immunoglobin A (IgA). Both these are stabilised by a Joining chain (a short length of protein) called the J chain. And this is the component that was co-opted from an entirely unrelated biological process, as a team of researchers at Penn State University, which included Kazuhiko Kawasaki, associate research professor of anthropology, discovered.

Their research was published a few days ago in Proceeding of the National Academy of Science (PNAS) and is explained in a Penn State University news release:

Monday 29 January 2024

Creationism in Crisis - The Billion-Year Evolutionary History of Plants On Earth


Since the first plants appeared, they have diversified into a vast range of forms, and sizes from pond scum to massive trees.

How did plants first evolve into all different shapes and sizes? We mapped a billion years of plant history to find out

Plants come in all manner of shapes and sizes, varying in complexity from simple single-celled algae, through mosses, liverworts and ferns to flowering plants and massive trees.

But how did they get this way?

A team of scientists led by Philip C J Donoghue, Professor of Palaeobiology, University of Bristol, James Clark, Research Associate, School of Biological Sciences, University of Bristol and Sandy Hetherington, Plant Evolutionary Biologist, The University of Edinburgh, set out to answer this question by looking at certain traits in each major plant group. The traits ranged from fundamentals like the presence of roots, leaves or flowers to the fine details such as the surface topography of pollen grains. All in all, the team collected data on 548 traits from more than 400 living and fossil plants, amounting to more than 130,000 individual observations.

They then used this data to plot the positions of plants, living and extinct in a 'design space', i.e., the theoretical range of possible forms for each major group.

What they found was that there tended to be a burst of diversification soon after the evolution of a major new trait, with the new lineage then tending to settle down to improve on what they had, rather than to innovate - until the next major innovation.

This what we would expect from the way a major new trait, such as the evolution of pollen as the male reproductive cell which could be transferred to the female by wind, insects, etc., so freeing the plants from the need to live in water or damp conditions so the motile male cells could 'swim' to the female, as it still does with the gametophytes - mosses, liverworts and ferns.

This innovation meant plants were not free to diversify into the dryer land between rivers, lakes and coastal margins and so colonise much more of the planet.

The same phenomenon is seen in animals where, for example, terrestrial living freed the early amphibians from dependence on water, except to breed, and the evolution of eggs, freed them even from that dependence; the evolution of flight freed the birds and bats to diversify into the new niches now open to them.

The team's work was published, open access in Nature Plants and is the subject of an article in The Conversation by the three lead authors. Their article is reprinted here under a Creative |Commons license, reformatted for stylistic consistency:

Creationism in Crisis - How An Iconic Australian Plant Originated in Africa - 132 Million Years Before 'Creation Week'


Banksia spinosa inflorescence

Banksias are iconic Australian plants, but their ancestors actually came from North Africa

No real scientists these days sets out to refute creationism as such, but most do anyway, because creationism is so counter-factual that almost any scientific facts, especially in the fields of biology, cosmology, archaeology, geology and palaeontology refute it. It takes a resolute and determined ignoramus to not be aware of that. The problem creationists have is that they get all their beliefs from an ancient text that is demonstrably wrong, even when explained away as allegorical or metaphorical. It is neither. It is quite simply wrong on every level.

So, creationists are left desperately trying to defend the childishly absurd claim that the entire Universe, including Earth and all living things on it, were all created out of nothing in a few days, about 10,000 years ago, by a magic man also made of nothing who designed himself before he existed then self-assembled according to that plan, with all the complexity and information needed to create and micromanage an entire Universe.

This, despite the fact that there are fossil remains of plants and animals from hundred, even thousands of millions of years before then and despite the fact that all the evidence points to a long, slow, evolutionary process of divergence from a common ancestor that lived well over a billion years ago, which was itself the result of a symbiotic associations of much earlier organisms.

One such paper, which casually and incidentally refutes creationism, recently published in Perspectives in Plant Ecology, Evolution and Systematics by three Australian botanists and plant ecologists and a South African Professor of botany, traces the origin of the family of iconic Australian plants, the Banksias, to North West Africa, 132 million years ago.

The story of this migration meshes in with the sciences of plate tectonics and oceanography allowing the plants to migrate across then contiguous land masses from what is now North West Africa to what is now Australia via South America and Antarctica, as land-masses split and diverged and sea-levels rose and fell to reveal land bridges where there is now ocean.

How they discovered this is the subject of an article in The Conversation by the four scientists. Their article is reprinted here under a Creative Commons licence, reformatted for stylistic consistency:
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