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

Thursday 18 April 2024

Creationism in Crisis - How People Lived In Caves in Arabia Before, During And After Creationism's Mythical Genocidal Flood


The entrance to Umm Jirsan Cave.
Credit: Green Arabia Project
First evidence of human occupation in lava tube cave in Saudi Arabia – Griffith News

In a stunning, if incidental and unintentional, rebuttal of creationist mythology, a team of palaeontologists led by scientists from Grifith University' Australian Research Centre for Human Evolution (ARCHE), have uncovered evidence of human occupation of caves in Saudia Arabia about 10,000 - 3,500 years ago.

This, of course, as any creationist will pretend isn’t significant, means that humans were living in these caves from before 'Creation Week' right through the mythical global genocidal flood, and beyond, and were completely undisturbed by any of it.

Wednesday 17 April 2024

Creationism in Crisis - How Plant Leaves Were Evolving 201 Million Years Before 'Creation Week'


Fossil leaves of Furcula granulifer from the Late Triassic, Greenland, scale bar = 5cm.

© Mario Coiro, Leyla Seyfullah
Seed ferns: Plants experimented with reticulated leaf venation 201 million years ago

Check any plan leaf and it will normally be one of two types - the monocotyledons with parallel leaf veins and the dicotyledons with a network of veins organised around a central vein with regular branches.

But this has not always been so. As a team of researchers at Vienna University, in collaboration with colleagues from the National Museum of Natural History in Stockholm and the Hebrew University in Jerusalem, have discovered, plants seem to have evolved the network pattern of leaf several times over the course of their evolution with most of them becoming extinct fairly quickly on an evolutionary timescale.

Their findings are published, open access, in the journal New Phytologist and explained in a University of Vienna news release:

Creationism in Crisis - How Copy & Paste Errors Created New Genetic Information - 700 Million Years Before 'Creation Week'


Examples of bilaterans
Centre for Genomic Regulation Website

Contrary to creationists dogma that no new genetic information can arise in a genome without god-magic because of some half-baked notion that the Third Law of Thermodynamics, which applies to energy, somehow applies to genetic information, researchers at the Centre for Genomic Regulation (CRG) in Barcelona, Catalunya, Spain, have shown how errors in replication in DNA some 700 million years ago eventually resulted in a vast supergroup of animals (the bilaterans, i.e. animals with bilateral symmetry) including vertebrates (fish, amphibians, reptiles, birds, and mammals), and invertebrates (insects, arthropods, molluscs, worms, echinoderms and many more).

These errors where whole genomes and genes were duplicated, created the condition where the original genes could continue to function while copies of them were free to mutate and produce new genes with new functions, under the control of natural selection which retains anything which is better than what preceded it and quickly eliminate anything which is worse.

Bilaterians are animals that exhibit bilateral symmetry, meaning they can be divided into two equal halves along a single plane. The vast majority of animals on Earth are bilaterians, including many familiar groups such as:
  1. Mammals: Humans, dogs, cats, elephants, and dolphins are all examples of bilaterians within the mammalian group.
  2. Birds: Birds, like sparrows, eagles, penguins, and ostriches, are also bilaterians.
  3. Reptiles: Snakes, lizards, turtles, and crocodiles exhibit bilateral symmetry.
  4. Amphibians: Frogs, toads, salamanders, and newts are examples of bilaterians within the amphibian class.
  5. Fish: Most fish species, including tuna, salmon, sharks, and goldfish, are bilaterians.
  6. Insects: Butterflies, ants, bees, beetles, and flies are bilaterians within the vast group of insects.
  7. Arachnids: Spiders, scorpions, ticks, and mites are bilaterians within the arachnid class.
  8. Mollusks: Snails, slugs, octopuses, and squids exhibit bilateral symmetry.
  9. Annelids: Earthworms, leeches, and marine worms are examples of bilaterians within the annelid phylum.
  10. Echinoderms: While not as obvious due to their radial symmetry as adults, echinoderms like sea stars and sea urchins exhibit bilateral symmetry during their larval stages.
These are just a few examples, but bilaterians encompass an incredibly diverse range of animal life on Earth.
The researchers have published their findings in Nature Ecology & Evolution and have explained it in a news release from the Centre for Genomic Regulation (CRG):

Monday 15 April 2024

Creationism in Crisis - Jumping Jehosaphat! It's Giant Kangaroos 30,000 Years Before 'Creation Week'!


Impression of South-eastern South Australia during the Pleistocene
(~500 thousand years ago)
Peter Schouten
We found three new species of extinct giant kangaroo – and we don’t know why they died out when their cousins survived

Archaeologists have re-assesses the fossils of giant kangaroos that lived in the Pleistocene along with other megafauna such as giant goannas (an Australian lizard) or Megalania, Varanus priscus, that grew to 4 meters (about 13 feet) long and went extinct about 40,000 years ago along with much of the megafauna. One of these kangaroos, the short-faced kangaroo Procoptodon goliah grew to three metres (9.5 feet) and probably weighed over 250 kilograms (about 550 lbs).

Why these large animals went extinct and what part if any the arrival of Homo sapiens played any part in it is a matter of debate, but what is not a matter for debate is whether or not they existed and when. Their discovery is explained by Isaac A. R. Kerr, a Research Assistant in the Palaeontology Laboratory, Flinders University, Australia in an open access article in The Conversation. His article is reprinted here, reformatted for stylistic consistency, under a Creative Commons license:

Creationism in Crisis - When Earth Was Flooded, According To Creationist Mythology, Australian Aboriginal People Were Making Pots And Campfires And Sailing To Pacific Islands


View across excavation to Blue Lagoon and reef flat.
Photograph: Ian J. McNiven.
Aboriginal people made pottery and sailed to distant offshore islands thousands of years before Europeans arrived

Sometimes you wonder whether creationists ever stop to think whether what they believe is rational, then you realise that most of them are from America where parochial ignorance and cultural chauvinism are the norm. They can believe, for example, that a global flood which left ancient cultures intact and their artifacts just where they left them, and which failed to lay down the predictable global layer of sediment full of jumbled fossils was still a global flood because er... Grand Canyon.

So, news that Australian archaeologists have unearthed potshards from 6,500 years ago in a shell midden which can be accurately dated (unlike potshards), will almost certainly pass unnoticed by the majority of American creationists.

But for those few who are interested in the truth, here is an article by Sean Ulm Sean Ulm, Director, ARC Centre of Excellence for Indigenous and Environmental Histories and Futures, James Cook University, Ian J. McNiven, Professor of Indigenous Archaeology; Chief Investigator, ARC Centre of Excellence for Australian Biodiversity & Heritage, Monash University and Kenneth McLean, Director, Walmbaar Aboriginal Corporation, Indigenous Knowledge describing how they found this evidence. Their article is reprinted here under a Creative Commons license, reformatted for stylistic consistency:

Saturday 13 April 2024

Creationism in Crisis - How Multicellularity Evolved - With New Genetic Information


Green Alaga, Stigeoclonium sp.

Macroalgal deep genomics illuminate multiple paths to aquatic, photosynthetic multicellularity: Molecular Plant

What are the main types of algae and how do they differ? Algae are classified into several main groups based on their characteristics, including pigmentation, cellular structure, and mode of reproduction. The main types of algae include:
  1. Diatoms (Bacillariophyta):
    • Diatoms are single-celled algae characterized by their unique glass-like silica cell walls called frustules.
    • They are typically found in freshwater and marine environments.
    • Diatoms are important primary producers and play a significant role in the global carbon cycle.
  2. Green Algae (Chlorophyta):
    • Green algae encompass a diverse group of algae that are mostly freshwater but also found in marine and terrestrial environments.
    • They contain chlorophyll a and b, giving them a green color, similar to land plants.
    • Green algae can be unicellular, colonial, filamentous, or multicellular, with a wide range of morphologies.
  3. Red Algae (Rhodophyta):
    • Red algae are predominantly marine algae, although some species can also be found in freshwater.
    • They contain pigments like chlorophyll a and various accessory pigments, including phycobiliproteins, giving them shades of red, pink, or purple.
    • Red algae often have complex multicellular structures and are important contributors to coral reef ecosystems.
  4. Brown Algae (Phaeophyta):
    • Brown algae are primarily marine algae, commonly found in cold-water habitats.
    • They contain chlorophyll a and c, along with fucoxanthin, which gives them their characteristic brown color.
    • Brown algae can range from small filamentous forms to large, complex seaweeds like kelps.
  5. Blue-Green Algae (Cyanobacteria or Cyanophyta):
    • Despite being called algae, cyanobacteria are actually prokaryotic organisms, classified within the domain Bacteria.
    • They are photosynthetic and often form colonies or filaments.
    • Cyanobacteria can be found in diverse habitats, including freshwater, marine environments, soil, and even extreme environments like hot springs.
    • Some cyanobacteria can produce toxins under certain conditions, leading to harmful algal blooms (HABs) and posing risks to aquatic life and human health.
These main types of algae differ in their pigmentation, cellular structure, habitat preferences, and ecological roles. While some are beneficial and essential for ecosystem health, others can become problematic under certain conditions, such as nutrient pollution or climate change. Understanding the characteristics and ecological functions of different types of algae is crucial for managing and conserving aquatic ecosystems.
Today’s refutation of creationists dogma comes in the form of an open access paper just published in the Cell Press journal, Molecular Plant. Research biologists have revealed how multicellularity evolved several times independently in algae, and how many of the new genes were acquired initially by viruses.

This gives the lie to creationist claims that new information can't arise in the genome because of some half-baked confusion of information with energy and a nonsensical assumption that new genetic information would need to come from nothing.

And of course, like about 99.99% of the history of life on Earth, it all happened in that very long period of pre-'Creation Week' history between Earth forming in an accretion disc around the sun and creationism's little god creating a small flat planet with a dome over it in the Middle East out of nothing, according to creationist mythology

In information provided by Cell Press ahead of publication, the scientists at New York Abu Dhabi University and Technology Innovation Institute, United Arab Emirates, said:
A deep dive into macroalgae genetics has uncovered the genetic underpinnings that enabled macroalgae, or "seaweed," to evolve multicellularity. Three lineages of macroalgae developed multicellularity independently and during very different time periods by acquiring genes that enable cell adhesion, extracellular matrix formation, and cell differentiation, researchers report April 12 in the journal Molecular Plant. Surprisingly, many of these multicellular-enabling genes had viral origins. The study, which increased the total number of sequenced macroalgal genomes from 14 to 124, is the first to investigate macroalgal evolution through the lens of genomics.

This is a big genomic resource that will open the door for many more studies. Macroalgae play an important role in global climate regulation and ecosystems, and they have numerous commercial and ecoengineering applications, but until now, there wasn't a lot of information about their genomes.

Alexandra Mystikou, co-first author
Division of Science and Math
New York University Abu Dhabi, Abu Dhabi, UAE.
Macroalgae live in both fresh and seawater and are complex multicellular organisms with distinct organs and tissues, in contrast to microalgae, which are microscopic and unicellular.

There are three main groups of macroalgae -- red (Rhodophyta), green (Chlorophyta), and brown (Ochrophyta) -- that independently evolved multicellularity at very different times and in very different environmental conditions.

Rhodophytes and Chlorophytes both evolved multicellularity over a billion years ago, while Ochrophytes only became multicellular in the past 200,000 years.

To investigate the evolution of macroalgal multicellularity, the researchers sequenced 110 new macroalgal genomes from 105 different species originating from fresh and saltwater habitats in diverse geographies and climates.

The researchers identified several metabolic pathways that distinguish macroalgae from microalgae, some of which may be responsible for the success of invasive macroalgal species.

Many of these metabolic genes appear to have been donated by algae-infecting viruses, and genes with a viral origin were especially prevalent in the more recently evolved brown algae.

They found that macroalgae acquired many new genes that are not present in microalgae on their road to multicellularity.

For all three lineages, key acquisitions included genes involved in cell adhesion (which enables cells to stick together), cell differentiation (which allows different cells to develop specialized functions), cell communication, and inter-cellular transport.

Many brown algal genes associated with multicellular functions had signature motifs that were only otherwise present in the viruses that infect them. It's kind of a wild theory that's only been hinted at in the past, but from our data it looks like these horizontally transferred genes were critical factors for evolving multicellularity in the brown algae.

David Nelson, co-first author
Division of Science and Math
New York University Abu Dhabi, Abu Dhabi, UAE.

Creationism in Crisis - Another Mystery Solved By Science - Giant Ichthyosaurs From 250 Million Years Before 'Creation Week'


Do some mysterious bones belong to gigantic ichthyosaurs? — University of Bonn

The thing about disagreements in science is that they aren't used as an excuse for persecution and schism, based on the notion that the side with the most power or the most followers wins as though truth can be determined by violence or opinion polls. In science, disagreements lead to discovery because in scientific debate the fact are, or should be, neutral, so they can referee the debate. The side with the evidence wins and the losers graciously accept that they were wrong.

This is the case of the long-standing disagreement in palaeontology over the mystery of giant bones which regularly turn up in deposits on Europe, which were first discovered in 1850 by the British naturalist Samuel Stutchbury, who reported finding a large cylindrical bone in Aust Cliff, near Bristol, UK. Similar fossils have also been found at sites around Europe, including Bonenburg in North Rhine-Westphalia, Germany and Provence, France. Stutchbury assumed they were from an extinct crocodile-like land animal, labyrinthodontia, but others disagreed. Other candidates were long-necked sauropods and an as yet unidentified, large dinosaur.

Not the mystery may have been solved by two palaeontologists working at the University of Bonn, Germany. They have published their findings, open access, in the journal PeerJ and explain it in a Rheinische Friedrich-Wilhelms Universität Bonn news release:

Friday 12 April 2024

Creationism in Crisis - How An Early Jawless Fish Was Feeding - About 400 Million Years Before 'Creation Week'


Fossil of Rhinopteraspis dunensis

Museum für Naturkunde, Berlin, Germany
3D mouth of an ancient jawless fish suggests they were filter-feeders, not scavengers or hunters - University of Birmingham

Today's incidental refutation of creationism comes to us from an international team of palaeontologists led by scientists from the University of Birmingham. They have shown how an early jawless fish was feeding, almost 400 million years before creationism's little pet god decided to create a small flat planet with a dome over it in the Middle East, in what creationists refer to as 'Creation Week'.

The researchers have used CT scanning techniques to construct a 3D image of the mouth-parts of Rhinopteraspis dunensis, an early, heavily-armoured boney fish that lived some 380 million years ago.

Thursday 11 April 2024

Creationism in Crisis - News Structure Evolved in Just 36 Years - 'Macro-Evolution' in Progress


Italian Wall Lizard, Podarcis sicula
Rapid large-scale evolutionary divergence in morphology and performance associated with exploitation of a different dietary resource | PNAS

Because of the regularity with which creationists demand evidence of 'macro-evolution' claiming that it has never been observed, I had decided to repost an expanded version of this article I originally wrote in 1918, to include more of the scientific evidence reported in the journal Proceedings of the National Academy of Science (PNAS).

It's another one of those 'non-existent' things that creationists must dread being shown.

No. This time it's not yet another of those 'missing' transitional fossils or intermediate forms. This time it's yet another example of something else 'impossible' and 'never observed'. It's yet another example of observed rapid evolution, including the evolution of new structures.

Wednesday 10 April 2024

Creationism in Crisis - How A Complex Organ Evolved Naturally


Spotted dolphins, Stenella frontalis
Toothed whale echolocation organs evolved from jaw muscles | Hokkaido University

There is nothing a creationist fraud likes more than an organ or process that can be presented as 'irreducibly complex' because it will only work if all components are present and in the right place. They can sell this to their dupes as an example of something they claim couldn't have evolved gradually because it only works when all components are assembled, with no functional intermediate stages, so it must have been 'intelligently designed' - by the locally-popular god, obviously.

Creationist guru Michael J Behe, used the example of the E. coli flagellum for that purpose, confident that his target dupes would not be aware that almost all the components of the proton motor were present in the Type III secretory system and only needed a few minor changes to function as a hugely advantageous organ of motility. The process of exaptation of redundant structures is quite sufficient to explain how 'irreducibly complex' structures can evolve.

What are the current theories of how the Escherichia coli flagella evolved? The evolution of Escherichia coli flagella is a subject of ongoing research and debate among biologists. While there isn't a single universally accepted theory, there are several hypotheses and models proposed to explain the evolution of bacterial flagella, including:
  1. Co-option Hypothesis: This hypothesis suggests that the flagellum evolved from pre-existing structures that were repurposed for motility. Some researchers propose that the flagellum shares ancestry with the Type III secretion system (T3SS), a needle-like structure used by bacteria to inject toxins or other proteins into host cells. According to this hypothesis, mutations and selective pressures led to the transformation of T3SS components into flagellar components.
  2. Selective Advantage Hypothesis: This hypothesis proposes that the early ancestors of bacteria acquired flagella as a means of enhancing their ability to move towards favorable environments or away from harmful ones. The ability to move towards nutrient-rich areas or away from toxic substances would have provided a significant selective advantage, leading to the evolution and refinement of flagellar structures over time.
  3. Genomic Evidence: Comparative genomics studies have provided insights into the evolution of flagella by examining the genetic sequences of various bacterial species. By analyzing similarities and differences in flagellar genes across different organisms, researchers can infer evolutionary relationships and trace the origins of flagellar components.
  4. Modular Evolution: Some researchers propose that the flagellum evolved through a process of modular evolution, where individual components or substructures of the flagellum evolved independently before being integrated into a functional motility apparatus. This model suggests that the flagellum may have originated from the sequential addition and modification of simpler structures, such as proto-flagella or pili.
  5. Evolutionary Intermediates: Studying the flagella of diverse bacterial species can provide insights into the evolutionary intermediates that may have existed during the transition from non-motile to motile forms. By identifying and characterizing these intermediates, researchers can gain a better understanding of the stepwise process by which flagella evolved.
Overall, while there is still much to learn about the precise evolutionary history of E. coli flagella, ongoing research efforts continue to refine our understanding of how these remarkable structures originated and diversified over time.
Just such an example of exaptation of redundant structures has just been revealed by researchers working Hokkaido University, Japan, who have shown that the complex echolocation system used by the toothed whales such as dolphins and orcas evolved out of the muscles and jaw bones that had previously been used to chew food but were redundant due to evolutionary changes which meant the whales swallowed their food whole.

The team have published their findings in the journal Gene. It is explained in a Hokkaido University news release: Toothed whale echolocation organs evolved from jaw muscles

Genetic analysis finds evidence suggesting that acoustic fat bodies in the heads of toothed whales were once the muscles and bone marrow of the jaw.

Toothed whale echolocation organs evolved from jaw muscles

Genetic analysis finds evidence suggesting that acoustic fat bodies in the heads of toothed whales were once the muscles and bone marrow of the jaw.

Illustration of the body plan of a toothed whale, with a cross section of the head showing the melon (dark yellow) and the extramandibular fat bodies (light yellow) which are key organs for using sound such as echolocation.

Hayate Takeuchi, Takashi Fritz Matsuishi, Takashi Hayakawa. Gene. January 20, 2024
Dolphins and whales use sound to communicate, navigate and hunt. New research suggests that the collections of fatty tissue that enable toothed whales to do so may have evolved from their skull muscles and bone marrow.

Scientists at Hokkaido University determined DNA sequences of genes which were expressed in acoustic fat bodies—collections of fat around the head that toothed whales use for echolocation. They measured gene expression in the harbor porpoise (Phocoena phocoena) and Pacific white-sided dolphin (Lagenorhynchus obliquidens). Their findings were published in the journal Gene.

The evolution of acoustic fat bodies in the head—the melon in the whale forehead, extramandibular fat bodies (EMFB) alongside the jawbone, and intramandibular fat bodies (IMFB) within the jawbone—was essential for sound use such as echolocation. However, little is known about the genetic origins of those fatty tissues.

How Eyes Evolved - A Worm's Eye View


Marvelous eyes, but you be the judge of this sea critter’s beauty. Vanadis is a byname of the Norse goddess of love, Freya.
Photo: Michael Bok
Mediterranean marine worm has developed eyes "as big as millstones"; – University of Copenhagen

Creationists love to cite the eye as an example of irreducible complexity' which could not have evolved by Darwinian step-wise evolution because anything less than a whole eye can't function as an eye.

They even misquote Darwin who, so they claim, admitted the evolution of the eye could not be explained, as though the entire unifying theory of biology rests on the opinion of one man who wrote his books about 160 years ago. But in their usual intellectually and morally bankrupt way, what they fail to do is to give the whole quote in the context in which Darwin used it to show that his theory of evolution was fully capable of explaining how something as complex as an eye could have evolved. It was typical of his style that he would set out a problem for biology, then show how his theory solved that problem. (see the full quote later).

Tuesday 9 April 2024

Creationism in Crisis - Evolution Of Improved Hearing In Mammals - 165 Million Years Before 'Creation Week'


Reconstruction of Feredocodon chowi (right) and Dianoconodon youngi (left).

© Chuang Zhao
New Fossils Change Thinking on Early Mammal Evolution | AMNH

Some 165 million years before their god created the small flat planet with a dome over it that Creationists love hearing about, early mammals were evolving into modern mammals, complete with the tiny bones called ossicles that are essential for hearing. These three small bones transmit sound across the inner ear to the auditory sense organ, the cochlea.

Changes in the mammalian dentition were key to freeing these parts of the jaw joint, according to an analysis of two Jurassic-era mammal fossils which are the subject of articles in Nature. These analyses fill a gap in our understanding of the evolution of mammalian dentition and provide evidence of the transition from part of the jaw to the auditory ossicles - the stapes, malus and incus.

Like almost all of the history of life on earth, this all happened in the very long 'pre-Creation' age when 99.99% of Earth's history happened. The discovery was made by a research team that included Jin Meng of the American Museum of Natural History. Their findings are explained in an American Museum of Natural History press release.

Monday 8 April 2024

Evolution News - An Atlas Of The Human Ovary Shows Common Ancestry of Mammals


Human ovarian follicle
First atlas of the human ovary with cell-level resolution is a step toward artificial ovary | University of Michigan News

This piece of research caught my eye, not so much because it refutes creationism with its daft notion of the special creation of humans as separate from all the other animals but because it's reminiscent of the research I used to be involved with in my first profession - a research technician in Oxford University's Department of Human Anatomy.

The research our small group was doing involved the hormonal control of reproduction in guinea pigs, which involved preparing light microscope slides of sections of guinea pig ovaries, and later on, transmission electron micrographs of ovarian tissues.

Like humans, guinea pigs have oestrus cycles where they periodically shed eggs from their ovaries regardless of whether they have mated or not. This is unlike some other mammals which ovulate soon after mating, stimulated to do so by the act of mating. Unlike human females, guinea pigs are only receptive for two or three days before and just after they ovulate. Outside that receptive period, they have a closure membrane that makes penetration impossible.

Sunday 7 April 2024

Creationism in Crisis - Researchers Have Discovered An Essential Step In The Evolution Of Walking


Tiktaalik, (artist's impression)
In the evolution of walking, the hip bone connected to the rib bones | Eberly College of Science

From the day its discovery was announced, Tiktaalik has been a major embarrassment for creationists because not only does it refute the claim that there are no intermediate forms, but it also belies the claim that the Theory of Evolution can't make predictions.

Not only is it intermediate between fully aquatic lobe-finned fish and terrestrial tetrapod, but its discoverers predicted exactly where it would be found in the geological column and promptly went and found it there, exactly were predicted in Canada's Ellesmere Island.

But that embarrassment is about to become even more acute.

Researchers at Penn State's Eberly College have shown that Tiktaalik's ribs were attached to its pelvis and that fact helped in the evolution of walking. The research team, co-led by Tom Stewart, assistant professor of biology in the Eberly College of Science at Penn State and Neil H Shubin, one of the discoverers of Tiktaalik, have published their findings open access in the journal Proceedings of the National Academy of Science (PNAS). It is also explained in a Penn State Eberly College news release by Sam Sholtis:

Saturday 6 April 2024

Superstition News - How Belief in God(s) Evolved in Human Culture


Christian church service
Why Do People Believe in God? | Psychology Today

From the point of view of an Atheist like me who realised religion was nonsense at the age of 9 and have been an atheist ever since, the fact that grown adults believe in a magic man in the sky who magically makes things happen does seem incredible.

It gets even more incredible that grown adults believe that, although omniscience and having a perfect plan for our individual lives, he needs to be told of bad things that need to be changed because he either doesn't know they're happening or doesn't know they are wrong.

And yet, for most people in the world, the answer seems obvious: Because it’s self-evident that God exists. From the point of view of the believer, the really puzzling question is how anyone could not believe.

Shinto shrine in Kyoto, Japan
So why do so many grown adults believe in at least one god, or if they're Hindu or Shintoist, or one of the other polytheist religions, several gods?

According to a 2018 article in Psychology Today by David Ludden, PhD, professor of psychology at Georgia Gwinnett College, religion is an evolved feature of human culture and there was a time when people didn't believe in gods.

In his article he makes the following key points:
  • Early in the history of humans, nobody believed in a god of any sort.
  • Religious belief is considerably lower in developed countries compared with the underdeveloped world.
  • Believing that God has a plan helps people regain some sense of control, or at least acceptance.

Friday 5 April 2024

Evolution in Action - New Study Finds Evidence for Evolution Of A New, Nitrogen-Fixing Cell Organelle


Transmission electron micrograph images of the C. parkeae stage of B. bigelowii. Light microscopy images (A,C) and corresponding TEM images are shown (B,D) for strain MK90-06. Usually, one endosymbiont is found per cell in the posterior of the cell (A,B); however, some of the cells had two endosymbionts per cell during cell division (C,D). Scale bars represent 5 μm in (A and C), and 2 μm in (B and D). E, endosymbiont; G, Golgi apparatus; M, mitochondrion; N, nucleus; P, plastid; and Py, pyrenoid.

Evolution in action? New study finds possibility of nitrogen-fixing organelles – Rhody Today

Most biologists now accept the Endosymbiosis Theory which explains how simple prokaryote cells became complex eukaryote cells by a single-celled prokaryote such as an archaea incorporating other single-celled prokaryotes inside its cell membrane. This may have been by engulfing them as prey or by being parasitised by them. Whatever the mechanism, a symbiotic relationship ensued which progressed to the extent that the incorporated cell's DNA was transferred to the host genome and the incorporated cell became a cell organelle.

This explains the origin of cell organelles such as the mitochondria which metabolise glucose to turn adenosine diphosphate (ADP) into adenosine triphosphate (ATP) which can then be used to power metabolic processes within the cell. Mitochondria have some similarities with rickettsia bacteria which strongly suggests they have evolved from free-living rickettsia.

Likewise, chloroplasts in plant cells were once free-living, photosynthesising cyanobacteria which became incorporated in what was to become algae, so giving rise eventually to almost all plant life.

And now we have evidence that another incorporation is evolving, in the form of nitrogen-fixing bacteria being incorporated as organelles into a marine alga, which gives the algae the ability to create ammonia and so nitrates directly from atmospheric nitrogen. This was discovered by researchers from the University of Rhode Island, the Institut de Ciències del Mar in Barcelona, the University of California at Santa Cruz and the Massachusetts Institute of Technology. They have published their findings, open access, in the journal Cell.

Although nitrogen is abundant, comprising about 79% of Earth's atmosphere, it exists as the diatomic gas dinitrogen (N2) which is notoriously stable making molecular nitrogen almost an inert substance and requiring a lot of energy to break the N-N bond. However, some bacteria, the nitrogen-fixing bacteria, have evolved the ability to do this using the enzyme nitrogenase:

Thursday 4 April 2024

Malevolent Designer News - New Discovery Unravels Malaria Invasion Mechanism


Plasmodium falciparum in a blood smear.
New Discovery Unravels Malaria Invasion Mechanism

Medical science just took a step forward in the continuing arms race between it and creationism's divine malevolence to try to prevent its parasite, Plasmodium falciparum from killing 600,000 people, mostly children, a year, mostly in Africa.

Creationists who use the traditional excuse that it's not their god who designs parasites but another intelligent designer - Sin - should refresh their memories of Michael J Beh's 'proof' that their god exists by falsely claiming that anti-malarial drug resistance in P. falciparum must have been intelligently designed because the (wrong) mathematical model he used gave the infinitesimally small probability it was intelligently designed to give, so could not have evolved.

So, they can't have it both ways: if evidence of design in parasites, no matter how spurious, is evidence for their god then their god is responsible for the design of those parasites. If not, then Michael J Behe's carefully concocted 'proof' is nothing of the sort.

The alternative is the blasphemous claim that there is another supernatural deity with powers to create living things, over whom their god has no power or authority.

So, while creationists are struggling with trying to hold two mutually exclusive views simultaneously, biomedical scientists are trying to unravel the devilishly clever way this parasite overcomes our defences to do what creationists must believe it was designed to do - make us sick and increase the suffering in the world.

This is the latest breakthrough medical science has just announced.

It was made by researchers from by the Swiss Tropical and Public Health Institute (Swiss TPH) and Griffith University’s Institute for Glycomics, led by Professor Gerd Pluschke of Swiss TPH. Their discovery concerns the way the parasite gains access to the red blood cells to begin their destruction. It is published, open access, in Cell Reports and is explained in a Swiss PTH news release:

Creationism in Crisis - A New Look at Bird Evolution - Not Whether, But How!


A greater flamingo, Mallorca, Spain.
Credit: Daniel J. Field
We’ve had bird evolution all wrong - News - University of Florida

To a child-like black vs white creationist, science changing its mind is science admitting it was wrong - which means it's probably wrong this time too, so all of science can be dismissed as wrong. Unless of course, it's some pseudo-science purporting to support creationism, then it's absolutely incontrovertible proof of creationism, because there is nothing a creationist craves more than proof of creationism provided by the same science they despise so much when it refutes creationism yet again.

So, news that a team of researchers at Florida University have re-examined the genetic evidence for the evolution of birds and revised the family tree will be music to the ears of any creationist fraud looking for some science to misrepresent. However, this research does nothing of the sort, and merely confirms what we already know - that birds diversified from a common ancestor by an evolutionary process. The debate is never about whether that happened, but how and exactly when.

What misled taxonomists was a chunk of DNA that has remained more or less unchanged for some 60 million years. By a process which is poorly understood, this large chunk of DNA avoids recombination during the process of egg and sperm production. Using this section alone gave one family tree, which put doves and flamingoes as close cousins, but using the whole genome gave a different family tree which makes doves and flamingoes much more distantly related (though of course, still related by common ancestry).

The research team have published their findings, open access, in Proceedings of the National Academy of Science (PNAS) and explain them in a University of Florida news release:

Wednesday 3 April 2024

Creationism in Crisis - Sophisticated Wooden Hunting Tools Were Being Made In Schöningen, Germany - 290,000 Years Before 'Creation Week'


Early humans used wood splitting 300,000 years ago to hunt animals, study shows

290,000 years before creationism's little god decided to create the small flat planet with a dome over it, in the Middle East, and before anatomically-modern humans had left Africa, someone was creating hunting weapons in a 'workshop' in what is now Schöningen, Lower Saxony, Germany.

What information do you have on the archaeological site at Schöningen, Lower Saxony, particularly on how the wooden artifacts were dated? The archaeological site at Schöningen, located in Lower Saxony, Germany, is renowned for its remarkable finds of wooden artifacts, particularly wooden spears. These artifacts have provided valuable insights into the behavior and technology of early humans in Europe.

The Schöningen site has yielded several wooden spears, some of which are remarkably well-preserved. These spears are estimated to be around 300,000 years old, making them some of the oldest known hunting weapons in the archaeological record.

One of the methods used to date the wooden artifacts found at Schöningen is dendrochronology, also known as tree-ring dating. Dendrochronology involves analyzing the growth rings of trees to determine the age of wooden samples. However, in the case of the Schöningen spears, dendrochronology was not applicable because the wood had undergone significant chemical and physical changes over time, making it difficult to identify and count growth rings.

Instead, researchers utilized other dating methods such as radiocarbon dating. Radiocarbon dating involves measuring the amount of radioactive carbon-14 remaining in organic material to estimate its age. However, radiocarbon dating is only effective for materials up to around 50,000 years old. To overcome this limitation, researchers at Schöningen used a method called electron spin resonance (ESR) dating.

ESR dating is a technique used to date materials that contain trapped electrons, such as tooth enamel or certain minerals. By measuring the amount of trapped electrons and their properties, scientists can estimate the age of the material. This method was used to date the sediment layers surrounding the wooden artifacts at Schöningen, providing an estimate of their age.

Through these dating methods, researchers have been able to establish the approximate age of the wooden spears found at Schöningen, shedding light on the hunting practices and technological capabilities of early humans in Europe during the Middle Pleistocene epoch.

Tell me more about electron spin resonance dating.

Electron Spin Resonance (ESR) dating is a scientific technique used to date materials that have been exposed to radiation, such as certain minerals or tooth enamel. It is particularly useful for dating archaeological and geological materials beyond the range of radiocarbon dating.

Here's how ESR dating works:
  1. Principle: When certain materials are exposed to radiation, such as cosmic rays or natural radioactivity in the environment, they can become trapped in defects within the crystal lattice structure of the material. These trapped electrons have an inherent spin, which can be affected by an external magnetic field. ESR dating measures the amount of trapped electrons and their spin properties to estimate the age of the material.
  2. Trapped Electrons: Over time, trapped electrons accumulate in the crystal lattice of the material. The rate of accumulation depends on factors such as the type and amount of radiation to which the material has been exposed, as well as its environment. Trapped electrons are usually produced by ionizing radiation, such as gamma rays or cosmic rays, which knock electrons out of their atomic positions and into trap sites within the crystal lattice.
  3. Measurement: To measure the trapped electrons, the sample is first exposed to a magnetic field, causing the electrons to absorb energy and move to higher energy states. When the magnetic field is removed, the electrons return to their original state, emitting energy in the form of electromagnetic radiation. This emitted energy is detected and analyzed to determine the concentration of trapped electrons and their properties.
  4. Age Calculation: The age of the sample is calculated based on the accumulated dose of radiation it has received over time. This dose is determined by comparing the concentration of trapped electrons in the sample to a standard dose rate calibration curve, which relates the amount of trapped electrons to the known radiation dose received by the material. By extrapolating the accumulated dose from the concentration of trapped electrons, scientists can estimate the age of the sample.
ESR dating has been used to date a variety of materials, including tooth enamel, quartz, and certain types of fossilized shells. It is particularly valuable for dating materials beyond the range of radiocarbon dating, extending the chronological record of archaeological and geological sites back hundreds of thousands to millions of years. However, ESR dating requires careful calibration and consideration of factors such as radiation dose rates and environmental conditions to produce accurate age estimates.
What hominins were in what is now Germany, 300,000 years ago? Around 300,000 years ago, during the Middle Pleistocene epoch, the hominins inhabiting what is now Germany were likely early members of the Homo genus. One of the most well-known and widespread species during this time was Homo heidelbergensis. Fossil evidence suggests that Homo heidelbergensis inhabited parts of Europe, including what is now Germany, during the Middle Pleistocene. These early humans were likely skilled hunters and toolmakers, and they may have been the ancestors of both Neanderthals and Homo sapiens. However, it's important to note that our understanding of ancient hominin populations is continually evolving as new discoveries are made and research progresses.
The main candidate for their creator is Homo heidelbergensis, believed to be the immediate ancestor of Neanderthals, but whoever made them, they are the oldest known complete hunting weapons.

They were found during an archaeological dig at Schöningen in 1994 and have now been examined using modern technology by researchers from the Lower Saxony State Office for Cultural Heritage (NLD) and the Universities of Reading, UK and Göttingen, Germany, who have reported their findings, open access, in Proceedings of the National Academy of Science (PNAS).

The researchers have shown how these pre-Homo sapiens people resharpened broken points on spears and throwing sticks and made tools by splitting wood - the first time this has been demonstrated for other than Homo sapiens. Some of the tools may have been used for softening and scraping animal skins rather than for hunting.

Creationism in Crisis - Evolving Horses Trample All Over Creationism


Feral modern horses, Ogden, Utah, USA.

Kelly Lambright via Getty Images
Horses lived in the Americas for millions of years – new research helps paleontologists understand the fossils we’ve found and those that are missing from the record

Those few creationists who understand the science hate the record of horse evolution found in the fossil record because it runs counter to their dogma. It shows progressive change over millions of years from a small five-toed herbivore the size of a dog, through increasing size and a progressive reduction in toes to give the modern horse which walks on the tips if a single digit on each foot.

It is a fossil record which gives the lie to creationist assertions that there are no transitional fossils since each stage is clearly intermediate between its ancestors and its descendants. Moreover, most of the evolutionary history of the horse takes place in the very long period of Earth's history from before 'Creation Week' when creationists dogma says Earth was magicked out of nothing by a magic man made of nothing who then magicked all the animals out of dirt, exactly as they are today without ancestors.

And there is more embarrassment for those creationists who like to imagine Stephen J Gould and Nilse Eldredge somehow refuted Darwinian evolution with 'punctuated equilibrium' because the evolution of the horse in North America is a perfect illustration of how Darwinian evolution can produce a local fossil record that looks like a period of 'equilibrium' followed by rapid, even sudden, change in form.

Horses originally evolved in North America before crossing over the land bridge between Alaska and Siberia into Asia where they underwent allopatric speciation and then became extinct in North America during the last Ice Age. The domesticated descendants of the Asian horse were then reintroduced to North America by European colonists during the Middle Ages and subsequently became feral. Any examination of the fossil record will now show what appears to have been a sudden change from the Pliocene horse to the modern horse around 800 years ago because the Darwinian evolution occurred not locally but in Asia, where the fossil record will show what appears to have been the sudden appearance of a Pliocene horse without ancestors and no clear relationship to anything in the local fauna.
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