Showing posts with label Archaeology. Show all posts
Showing posts with label Archaeology. Show all posts

Wednesday, 5 March 2025

Refuting Creationism - A Giant Scorpion from 125 million years Before 'Creation Week'


Fossilized scorpions are extremely rare. J. longchengi is only the fourth terrestrial species found in China.
Image credit: NIGPAS
Jiangsu researchers discover 125-mln-year-old scorpion fossil | ENGLISH.JSCHINA.COM.CN

Some years ago, on holiday in Northern Greece, myself my eldest two children were exploring an old quarry which had been used as a local rubbish dump. I had come across it the day before and had told my children that this was just the sort of place to find scorpions. True to my prediction, as I turned over a flat piece of plywood, there in all their glory were two pale yellow scorpions! I gently pressed one down with a stick so my children could watch it sting the stick with a series of rapid jabs with its tail.

Fortunately, they were relatively small compared to the scorpions that lived in what is now China in the Mesozoic in that long period of history from before creationism's little god created a small flat planet with a dome over it, when 99.9975% of Earth's history happened, giant venomous scorpions lived in what is now China, 125 million years ago. Jeholia longchengi was around 4 inches (10 cm) long and was a key species within the food chain of the Cretaceous ecosystem.

Describe the evolutionary history of scorpions, please. Scorpions have a long and fascinating evolutionary history, stretching back over 435 million years to the Silurian period. They are among the earliest known terrestrial arthropods and have undergone relatively little morphological change over time, demonstrating a remarkable case of evolutionary stability.

Origins: Aquatic Ancestry

The earliest scorpions, such as Parioscorpio venator (dating to around 437 million years ago), show evidence of an aquatic or semi-aquatic lifestyle. These early scorpions likely lived in shallow marine or freshwater environments, resembling their eurypterid (sea scorpion) relatives. Their anatomy suggests they had book gills, similar to modern horseshoe crabs.

Transition to Land: The Devonian Shift

By the Late Silurian to Early Devonian (about 420–400 million years ago), scorpions began to transition to a terrestrial lifestyle. Fossil evidence suggests that some scorpions developed book lungs, an adaptation that allowed them to extract oxygen from air rather than water. This transition is crucial because it marks one of the earliest instances of arthropods colonizing land.

Carboniferous Period (359–299 million years ago): Giant Scorpions

During the Carboniferous, scorpions diversified significantly and some reached impressive sizes. Some species, like Pulmonoscorpius, grew up to 70 cm (27 inches) long. This period was characterized by high atmospheric oxygen levels, which may have supported the evolution of large arthropods.

Mesozoic Era (252–66 million years ago): Early Modern Scorpions

By the Mesozoic, scorpions had evolved into more recognizable forms, with many modern features already in place. Fossils from this time indicate that scorpions had adapted to various terrestrial habitats, from deserts to tropical forests.

Cenozoic Era (66 million years ago–present): Stability and Radiation

Scorpions have changed relatively little over the past hundred million years, suggesting that their general body plan was already highly successful. Today, over 2,500 species of scorpions exist, inhabiting diverse environments worldwide, from rainforests to deserts.

Key Evolutionary Trends
  1. Transition from aquatic to terrestrial habitats
  2. Development of book lungs for respiration on land
  3. Early gigantism during the Carboniferous
  4. Stabilization of body morphology since the Mesozoic
  5. Diversification into modern ecological niches
Scorpions are an example of evolutionary success, persisting through multiple mass extinctions while maintaining a body plan that remains effective in predation and survival.
A fossil of one of them has just been described in the journal Science Bulletin and announced in a news item from Jiangsu:
Jiangsu researchers discover 125-mln-year-old scorpion fossil
A team led by researcher Huang Diying from the Nanjing Institute of Geology and Palaeontology under the Chinese Academy of Sciences has found an ancient scorpion fossil dating back approximately 125 million years.
The fossil, named Jeholia longchengi after its discovery site in the Jehol Biota of Longcheng District in Chaoyang City, Northeast China’s Liaoning Province, is the first Mesozoic scorpion fossil unearthed in the country.

Huang explained that the scorpion lived during the Early Cretaceous period and the Jehol Biota preserved numerous fossils, including feathered dinosaurs, early birds and plant fossils, and is regarded as one of the most important paleontological discoveries of the 20th century.

Measuring around 10 centimeters in length, the species is believed to have been a secondary or tertiary consumer in the Jehol Biota food web and features long legs and an elongated venomous stinger.

Only three scorpion fossils have previously been found in China. This discovery will contribute to the understanding of biodiversity of the Mesozoic era, and will help reconstruct the ecosystem of that time.

Huang Diying, lead author
State Key Laboratory of Palaeobiology and Stratigraphy
Nanjing Institute of Geology and Palaeontology,
and Center for Excellence in Life and Paleoenvironment,
Chinese Academy of Sciences, Nanjing, China.
As an added extra, just to allay creationists suspicions that the date of this fossil may have been faked:
What information do you have on the Jehol Biota, especially how its age was determined? The Jehol Biota: An Overview

The Jehol Biota is an exceptionally well-preserved fossil assemblage from the Early Cretaceous (about 133–120 million years ago) of northeastern China, particularly in Liaoning, Hebei, and Inner Mongolia. It is famous for its fossilized birds, feathered dinosaurs, early mammals, plants, insects, and aquatic organisms. The preservation is remarkable, often showing soft tissues, feathers, and even stomach contents.
Age Determination of the Jehol Biota

The age of the Jehol Biota has been determined using multiple methods, primarily:
  1. Radiometric Dating (Zircon U-Pb Dating)
    The most reliable way to date volcanic ash layers interbedded with the fossil-bearing sediments is Uranium-Lead (U-Pb) dating on zircon minerals. Zircons form in volcanic eruptions and contain uranium, which decays to lead at a known rate, providing an accurate radiometric clock.
    • Yixian Formation (lower part of Jehol Biota): Dated to ~133–125 million years ago (Ma)
    • Jiufotang Formation (upper part of Jehol Biota): Dated to ~120 Ma
    These ages are consistent across multiple studies, confirming the Jehol Biota as Early Cretaceous (Hauterivian–Aptian stages).
  2. Argon-Argon (40Ar/39Ar) Dating
    Another method used is 40Ar/39Ar dating on volcanic feldspar minerals, which provides independent confirmation of the zircon-based U-Pb dates. These results have generally aligned with the U-Pb ages, supporting the Early Cretaceous timeframe.
  3. Biostratigraphy (Fossil Correlation)
    Fossils from the Jehol Biota, particularly certain fish, molluscs, and index fossils like ostracods and conchostracans have been correlated with well-dated formations elsewhere in China and Mongolia. This cross-referencing with other Early Cretaceous faunas supports the radiometric dating results.
  4. Magnetostratigraphy
    Paleomagnetic studies (analyzing Earth's past magnetic field reversals recorded in rock layers) also support the Early Cretaceous age by aligning with the global geomagnetic polarity timescale.

Conclusion

The age of the Jehol Biota (~133–120 Ma) has been established through a combination of U-Pb zircon dating, 40Ar/39Ar dating, biostratigraphy, and magnetostratigraphy making it one of the best-dated fossil Lagerstätten from the Early Cretaceous. This precise dating has been crucial in understanding early avian evolution, feathered dinosaur diversity, and early angiosperm development.

If these dating methods are wrong because radioactive decay rates used to be much higher, this would have meant the forces that hold an atomic nucleus together would have been too weak for atoms to form.

So, it comes down to creationists having to choose between radioactive decay being much faster than today so 6,000 years looks like 125 million years, in which case atoms could not have existed when their putative creator was creating life, or radioactive decay rates are constant and the dating methods that use them are correct, in which case there are 125 million-year-old fossils of giant scorpions that lived millions of years before creationists believe there was a universe.
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Tuesday, 4 March 2025

Refuting Creationism - How Humans Had Reached All Seven Habitable Continents Thousands of Years Before 'Creation Week'.


Most scientists think that humans reached Australia at least 50,000 years ago. Here, an Indigenous man holds traditional weapons during a ceremonial dance at a festival in Cape York, Australia.
Image credit: chameleonseye via Getty Images.
When did modern humans reach each of the 7 continents? | Live Science

Modern humans had dispersed out of Africa and populated every continent except Antarctica, thousands of years before creationism's little god created a small flat planet with a dome over it in the Middle East and claimed it was the entire Universe, according to creationist mythology.

So, what was the timeline of this dispersion?

After our species, Homo sapiens, emerged in Africa at least 300,000 years ago, some eventually ventured out, trekking and voyaging across the world.

Tuesday, 25 February 2025

Refuting Creationism - Neanderthals Evolved By Loss of Genetic Information


Fig. 1: Summary of individuals included in the analyses.
a The geographical and chronological range of the Neanderthal clade individuals and modern humans included in the analysis. The symbols correspond to the n of individuals from each site and are colored as follows: blue = Sima de los Huesos; purple = Krapina; green = late Neanderthals; orange = modern humans. Orange ellipses correspond to the approximated geographical range of the extant modern human assemblage. Age estimates of fossil specimens are provided in Table 1. Background satellite image was downloaded from © Mapbox, © OpenStreetMap, © Maxar and rescaled to fit to figure panel size. b–e Three-dimensional models of the left semicircular canal and vestibule of selected individuals for the four groups considered in the present study.
The inner ear of Neanderthals reveals clues about their enigmatic origin

Creationists will confidently tell you that a loss of genetic information is invariably fatal so can play no part in evolution. They believe this because the frauds at the Discovery Institute have misled them into believing that every piece if DNA and therefore every piece of genetic information has a purpose.

And yet researchers have shown that it was a loss of genetic information following a population bottleneck that gave rise to the classic Neanderthals as a distinct species from their pre-Neanderthal ancestors.

This was the conclusion from a study led by Alessandro Urciuoli (Institut Català de Paleontologia Miquel Crusafont, Universitat Autònoma de Barcelona) and Mercedes Conde-Valverde (Cátedra de Otoacústica Evolutiva de HM Hospitales y la Universidad de Alcalá), researchers measured the morphological diversity in the structure of the inner ear responsible for our sense of balance: the semicircular canals.

Friday, 14 February 2025

Refuting Creationism - Where Europeans' Ancestors Came From - Thousands of Years Before 'Creation Week'


Reconstruction of Yamnayan life in the Pontic Area, 5000 years ago.
AI-generated image (ChatGPT4o).
New research based on an analysis of the genomes of 435 individuals has revealed the rich history of the ancestors of modern Europeans, especially the mixing of multiple ethnic groups in the Pontic Area - modern Ukraine - between 8,400 and 4,000 year ago which eventually gave rise to the Yamnaya people who get their name from the Russian for 'pit burial' (Yamna in Ukrainian).

Before the Yamnaya spread into Europe, they were preceded by two earlier waves of migration: firstly, hunter-gatherers who arrived about 45,000 years ago having interbred with and replaced the Neanderthals who had lived there for the previous 250,000 years. These were followed by farmers who came from the Middle East, starting about 9,000 years ago.

The Yamnaya, having formed a stable linguistic and cultural group, and either invented or copied ox-drawn carts and skilled horsemanship, which gave them great mobility, began to expand their range, probably under population pressure beginning about 5,300 years ago and lasting for some 1,800 years, eventually reaching all parts of Western Europe including the Iberian Peninsula and the British Isles.

Wednesday, 12 February 2025

Refuting Creationism - Human Cannibalism In Europe - 8,000 Before Creation Week



The 18,000-year-old discoveries from the Maszycka Cave include decorated hunting tools made of bone and antler.
Photo: Darek Bobak.
Information for the Media - Georg-August-Universität Göttingen

A good 8,000 years before creationism's little god created the small flat planet with a dome over it as described in Genesis, modern humans were painting wonderful paintings in caves in France and Spain, and cannibalising other humans in what is now southern Poland.

These people were the Magdalenian, a pan-European culture that existed during the Last Glacial Maximum, who are widely regarded as having a form of religion and belief in an afterlife, or at least a spiritual connection to the animals they hunted and depicted on cave walls. However, judging by their cannibalism and casual disposal of human remains along with the bones of the species they hunted for food, and the fact that they decorated and used human bones as utilities such a drinking cups made from human skull caps, they may not have had much regard for the dead.

Saturday, 25 January 2025

Creationism in Crisis - Early Hominins in Eurasia - >1.95 Million Years Before 'Creation Week'


Research team led by OHIO’s Sabrina Curran finds new evidence that pushes back the arrival of early hominins in Europe; discovery published in Nature Communications
Mandible with cut marks

The problem with trying to maintain a belief that Earth is between 6 and 10 thousand years old is that 99.9975% of its history occurred earlier than 10,000 years ago, so almost everything archaeologists and geologists discover will prove to be from before you believe Earth existed, which, for normal people, might just be more than a hint that Earth is considerably older than you think.

Not so for creationists however, who consider their beliefs to be sacred and unfalsifiable, so the facts must be wrong.

The traditional way is to declare that radioactive decay rates on which geological formations and archaeological artifacts are dated must have changed, sometimes by many orders of magnitude.

These same creationists will also argue in a different context that the laws of nature which govern the structure and behaviour of the Universe and everything in it are so finely tuned to support life, that they must have been set by an intelligent designer.

However one of those 'fine-tuned' parameters is the weak nuclear force that binds the protons and neutrons in the atomic nuclei and for a radioactive atom to decay means that a quantum fluctuation in the energy levels in some of these particles must exceed the weak force binding them together, so the particle is ejected. But, for radioactive decay rates to be several orders of magnitude higher, the weak nuclear force would need to be much lower, below the point at which even stable atomic nuclei form at all. This means, when they believe the universe was created along with atoms, planets and life were created, there would have been no atoms to make it all from. Life would have been impossible.

An added problem is that scientists have shown that radioactive decay rates of different elements remain absolutely constant in a range of extreme temperature and pressure conditions, so there appears to be no support whatsoever for the declaration that decay rates have changed by several orders of magnitude so that an age of 10,000 year or less just happens to look like 300 million years or whatever finding is being waved aside.

If there were any merit in the creationist claim of a fine-tuned Universe, then it has been fine-tuned to make it look 14 billion years old, Earth to look nearly 4 billion years old and living organisms to have been on it for most of that time.

With that in mind then, researchers have just announced that they have found evidence of the presence of hominins in Eurasia 2 million years ago, which pushes back the earliest evidence of hominin presence outside Africa by at least 150,000 years to a time considerably earlier than Homo sapiens first appear in the fossil record - supporting the theory that the earliest migration into Eurasia was by an archaic hominin such as H. erectus.

Refuting Creationism - Walking With Dinosaurs - 166 Million Years Before 'Creation Week'


Excavated footprint.
Credit: Oxford University Museum of Natural History.
Major new footprint discoveries on Britain’s ‘dinosaur highway’ | University of Oxford

Scientists from Oxford and Birmingham Universities have uncovered hundreds of tracks of different sorts of dinosaur in a quarry in North Oxfordshire, and, unlike those in the Paluxy Riverbed, Texas, USA, no-one has carved human footprints in amongst them to fool tourists.

Amongst the tracks are five distinct trackways, the longest of which is 150 meters. Sadly for creationists, we can be sure there will not be any human footprints in the same rock formation because these tracks were made around 166 million years ago when the earliest mammals hadn't diversified even into simians, let alone the African apes.

Friday, 24 January 2025

Refuting Creationism - Our Ancesters Were Vegetarian, 3 Million Years Before 'Creation Week'



'Little Foot' from the Sterkfontein Cave, South Africa
Witwatersrand University
Three million years ago, our ancestors were vegetarian - Wits University

The Australopithecus genus is widely regarded as the immediate ancestor of the Homo genus that includes modern humans, Homo sapiens, but, from new evidence revealed by a team of researchers from the Max Planck Institute for Chemistry in Germany and the University of the Witwatersrand in South Africa, it appears that meat did not become part of our immediate ancestors' diet until after Homo species emerged.

The evidence comes from an isotope analysis of the enamel from the fossilised teeth of seven Australopithecus individuals is strongly indicative of a vegetarian diet with little or no meat consumption.

How they discovered this is the subject of a paper in Science and a new item from Witwatersrand University. Creationists should note that the isotopes of nitrogen on which this analysis is based are stable, so the traditional excuse that radioactive decay rates have changes over time is not relevant here. Besides, they are not the basis of dating these fossils, but of working out where in the food chain these Australopithecines were:

Tuesday, 10 December 2024

Refuting Creationism - Ritual Gatherings in a Cave in Israel - 25,000 Years Before 'Creation Week'


Manot Cave, Israel
Earliest deep-cave ritual compound in Southwest Asia discovered The Daily The Daily

Clearly, the authors of the creation myths in Genesis had no knowledge of their own history let alone the history of the rest of the world, as 25,000 years before the time in which they set their 'creation week', there were people holding ritual gatherings in a cave in what is now Israel.

Before the mythical 'creation week' there was supposedly no Earth, no Universe, no living beings and only a god made of nothing which had self-assembled out of nothing according to a design it made before it existed.

Creationists reason that the Universe and life on Earth is too complex to have arisen spontaneously, and it couldn't have all come from nothing, so an even more complex god must have arisen spontaneously out of nothing first then created everything else out of nothing by magic. To a child-like creationists there is no possible flaw in that reasoning.

Sunday, 8 December 2024

Refuting Creationism - Domesticated Dogs 2000 Years Before 'Creation Week'


Eurasian/North American Grey Wolf, Canis lupus.

By User:Mas3cf - This file was derived from: Eurasian wolf.JPG, CC BY-SA 4.0, Link
How did humans and dogs become friends? Connections in the Americas began 12,000 years ago | University of Arizona News

At least 2,000 years before Creationists' little god created a small flat planet with a dome over it in the Middle East, human in Alaska were feeding domesticated dogs on salmon, according to the findings of palaeontologists from the University of Arizona.

But of course, the parochial Bronze Age pastoralists from the infancy of our species who made up that myth, couldn't possibly have known anything about when dogs were domesticated, or Alaska for that matter because, as we can see from the tales they made up, they knew nothing of the world beyond a day or two's walk from their pastures and were completely ignorant of the geography, geology and history of the planet and life on it - which is why they made up such implausible origin myths in the first place.

That there were people feeding salmon to their domesticated dogs about 12,000 years ago is the subject of a paper published recently in Science Advances by the Arizona University team led by Assistant Professor François Lanoë, of the School of Anthropology in the College of Social and Behavioral Sciences. They explain their findings in an Arizona University News release

Tuesday, 15 October 2024

Refuting Creationism - The Japanese People Didn't Notice Noah's Genocidal Flood!


Human remains from the Yayoi period, approximately 2,300 years ago, from which DNA was extracted.
Map of Japan showing Sakhalin (far north) and the Kuril and Ryukyu Islands

Google Map
Traces of ancient immigration patterns to Japan found in 2000-year-old genome | SCHOOL OF SCIENCE THE UNIVERSITY OF TOKYO

Being parochial Bronze Age pastoralists who knew about nothing and nowhere that was more than a day or two's walk from their hill pastures in Canaan, those who made up the Hebrew creation myths could not possibly have been aware that there were other cultures in far-away places like China, Korea and Japan, which had ancient histories going way back before the myth-makers thought Earth was created, and which were unscathed by an global flood at the time in which they set that tale.

Had they been aware of them, they could have made up slightly more plausible myths with a more realistic timeline, instead of requiring their believers to try to compress everything that's happened in the entire 14-billion-year-old Universe into 10,000 years.

But how could they have done so when they had no-one to teach them the real history of the planet and the people living on it? All they had was their own limited imagination and a handful if inherited myths from neighbouring culture, like Egypt and Sumeria, for theirs was a backward, illiterate culture from the fearful infancy of our species, dependent on oral traditions and superstitions.

How could they possibly have known, for example, that a population of humans had been more or less isolated for about 6,500 years, ending at about the time the myth-makers believed Earth was made out of nothing by magic, complete with a dome over it to cover the small, flat place they called home? They would have known nothing about immigration from China or from the Korean Peninsula into the Japanese archipelago that brought this period of isolation to an end and probably resulted in the present-day population of Japan.

So, of course, they saw nothing wrong with inventing a tale about a genocidal flood killing everyone apart from 8 related survivors, or of building a tower to reach above the dome or about a panicking god making them all speak different languages so they couldn't work in cooperative groups any more, and yet, if their tale is to be believed, the descendants of those few survivors, all speaking different languages, migrated to places like China, Korea and Japan where they all adopted the local language and writing that had been used for several thousand years, forgot all about Noah and his flood and invented new gods and religions, whereas the myth-makers of Canaan remembered it all word-perfect in every detail...

So, how do we know the record they left was wrong?

Friday, 11 October 2024

Refuting Creationism - Humans Were Using Fire In Southeast Asia 42,000 Years Before 'Creation Week'


Fossils and fires: insights into early modern human activity in the jungles of Southeast Asia – News

At the same time that creationists believe their small god was making a universe consisting of a small flat planet with a dome over it in the Middle East, then magicking a man a d a woman without ancestors, real humans were living in the jungles of Southeast Asia and making camp fires, around which they were probably making up origin myths just like the Middle Eastern Bronze Age pastoralists did. The difference was, their myths didn't get written down and included in a book declared to be the inerrant word of a magic man in the sky, so they aren't available to fool gullible people with today.

Instead, they left tangible records of their activities that scientists are now discovering and dating to between 52,000 and 10,000 years ago; records moreover that if the campfire tales of the Middle East had any truth in them would have been swept away and destroyed or covered with a deep layer of silt containing the bodies and remains of the animals and plants destroyed in the mythical global genocidal flood inflicted on the planet by an irascible magic despot.

Ironically, the human remains found buried in sediment in a cave floor were probably washed into the cave by a local flood, so all the other fossils at that location are also of local species, not the world-wide jumble that a global flood would have produced.

Tell me about the prehistoric history of the humans who occupied the Tam Pà Ling cave in Laos, please. The Tam Pà Ling cave, located in northern Laos, has yielded some of the most significant prehistoric human remains in Southeast Asia, providing key insights into the early human migrations in the region. The cave, whose name means "Cave of the Monkeys," sits at around 1,170 meters above sea level in the Annamite Mountains, making it an ideal site for shelter during prehistoric times.

Key Findings and Human Occupation
The site became famous when researchers unearthed several human fossils, including a cranium and jawbones, that have been radiocarbon dated between 46,000 and 63,000 years ago. These discoveries suggest that anatomically modern humans (*Homo sapiens*) were present in Southeast Asia much earlier than previously believed. The remains from Tam Pà Ling are considered some of the oldest evidence of modern humans in mainland Asia.

Significance in Human Migration
The fossils found in Tam Pà Ling have played an essential role in understanding the "Out of Africa" migration, where *Homo sapiens* spread from Africa to the rest of the world. The cave’s location, relatively close to the Mekong River, is thought to have been part of a corridor that early humans used as they moved from Africa through the Middle East, into South Asia, and ultimately into Southeast Asia and Australia.

The discovery of such early modern human remains in Laos supports the theory that early humans reached Southeast Asia via inland routes, rather than following only coastal paths. This inland route theory aligns with the ecological diversity of the region, which would have provided rich resources for early hunter-gatherer groups.

Anatomical Evidence
The fossils found in Tam Pà Ling are distinctly modern in their features. The skulls exhibit traits that are fully consistent with *Homo sapiens*, such as a high forehead, rounded braincase, and small, flat faces. However, some subtle characteristics, like thicker bones and robustness, indicate potential regional adaptations or the influence of archaic hominins like *Homo erectus* or *Denisovans*, both of whom were known to have existed in the broader region.

Cultural Context
No significant cultural artifacts, such as tools or other evidence of complex human behavior, have been found alongside the fossils in Tam Pà Ling, which leaves some aspects of the lives of these early inhabitants uncertain. Nonetheless, their presence in the cave hints at how early humans adapted to diverse environments—ranging from highland caves like Tam Pà Ling to coastal areas.

Importance in the Global Human Evolution Story
The discovery of these early human remains in Tam Pà Ling has contributed to the global conversation on human evolution. It suggests that *Homo sapiens* coexisted with archaic hominins in Asia longer than once thought. It also challenges the idea that humans primarily spread through coastal routes, indicating that Southeast Asia was likely populated by multiple waves of migration, using both coastal and inland routes.

The Tam Pà Ling site remains an important location for understanding the complexity of early human migration and the spread of *Homo sapiens* across the globe.
The cave is the Tam Pà Ling cave, located in northern Laos where Laotian, French, American and Australian archaeologists have been working for some 14 years to unearth the secrets contained in it.

Now a new study, led by PhD candidate Vito Hernandez and Associate Professor Mike Morley from the College of Humanities, Arts and Social Sciences at Flinders University, SA, Australia, has reconstructed the ground conditions inside the cave between 52,000 and 10,000 years ago. They have just published their findings in Quaternary Science Reviews and announced them in a Flinders University news release:
Fossils and fires: insights into early modern human activity in the jungles of Southeast Asia
Studying microscopic layers of dirt dug from the Tam Pà Ling cave site in northeastern Laos has provided a team of Flinders University archaeologists and their international colleagues further insights into some of the earliest evidence of Homo sapiens in mainland Southeast Asia.
The site, which has been studied for the past 14 years by a team of Laotian, French, American and Australian scientists, has produced some of the earliest fossil evidence of our direct ancestors in Southeast Asia.

Excavation of the Tam Pà Ling cave

Now a new study, led by PhD candidate Vito Hernandez and Associate Professor Mike Morley from the College of Humanities, Arts and Social Sciences, has reconstructed the ground conditions in the cave between 52,000 and 10,000 years ago.

Using a technique known as microstratigraphy at the Flinders Microarchaeology Laboratory, we were able to reconstruct the cave conditions in the past and identify traces of human activities in and around Tam Pà Ling. This also helped us to determine the precise circumstances by which some of the earliest modern human fossils found in Southeast Asia were deposited deep inside.

Vito C Hernandez, co-lead author
Flinders Microarchaeology Laboratory
College of Humanities, Arts and Social Sciences
Flinders University, South Australia, Australia.


Microstratigraphy allows scientists to study dirt in its smallest detail, enabling them to observe structures and features that preserve information about past environments and even traces of human and animal activity that may have been overlooked during the excavation process due to their minuscule size.

The human fossils discovered at Tam Pà Ling were deposited in the cave between 86,000–30,000 years ago but until now, researchers had not conducted a detailed analysis of the sediments surrounding these fossils to gain an understanding of how they were deposited in the cave or the environmental conditions at the time.

Published in Quaternary Science Reviews, the findings reveal conditions in the cave fluctuated dramatically, going from a temperate climate with frequent wet ground conditions to becoming seasonally dry.

This change in environment influenced the cave’s interior topography and would have impacted how sediments, including human fossils, were deposited within the cave. How early Homo sapiens came to be buried deep within the cave has long been debated, but our sediment analysis indicates that the fossils were washed into the cave as loose sediments and debris accumulating over time, likely carried by water from surrounding hillsides during periods of heavy rainfall.

Associate Professor ,” says Associate Professor W.M. Morley, co-lead author
Flinders Microarchaeology Laboratory
College of Humanities, Arts and Social Sciences
Flinders University, South Australia, Australia.

The team also identified preserved micro-traces of charcoal and ash in the cave sediments, suggesting that either forest fires occurred in the region during the drier periods, or that humans visiting the cave may have used fire, either in the cave or near the entrance.

This research has allowed our team to develop unprecedented insights into the dynamics of our ancestors as they dispersed through the ever-changing forest covers of Southeast Asia, and during periods of variable regional climate instability.

,Assistant Professor Fabrice Demeter, co-author
Lundbeck Foundation GeoGenetics Centre
Globe Institute
University of Copenhagen, Copenhagen, Denmark.
Publication:
VC Hernandez, MW Morley, AM Bacon, P Duringer, KE Westaway, R Joannes-Boyau, JL Ponche, C Zanolli, P Sichanthongtip, S Boualaphane, T Luangkhoth, JJ Hublin, F Demeter
Late Pleistocene–Holocene (52–10 ka) microstratigraphy, fossil taphonomy and depositional environments from Tam Pa Ling cave (northeastern Laos) Quaternary Science Reviews (2024) 108982. DOI: 10.1016/j.quascirev.2024.108982
Highlights
  • Late Pleistocene-Holocene cave sediments from Tam Pà Ling, northeastern Laos, were geoarchaeologically investigated.
  • Microstratigraphic analyses were employed.
  • Ground and ambient conditions vary in the cave ∼52–10 ka.

Abstract
Fossil evidence for some of the earliest Homo sapiens presence in mainland Southeast Asia have been recovered from Tam Pà Ling (TPL) cave, northeastern Laos. Taphonomic indicators suggest that these human fossils washed into TPL via gradual colluviation at varying times between MIS 5–3, yet no attempt has been made to situate them within the depositional environments of the cave within these periods. This has precluded a deeper appreciation of their presence there and in the surrounding landscape. In this first microstratigraphic study of TPL, we primarily use sediment micromorphology to reconstruct the depositional environments of the cave, relate these environments with the taphonomic history of the human fossils recovered from the upper 4 m of the excavated sequence, and explore how the sediments can better explain the presence of these humans in the area during MIS 3–1 (52–10 ka). Our results demonstrate changes in local ambient conditions from being temperate to arid, with ground conditions often wet during MIS 3 and becoming increasingly seasonal (wet-dry) during MIS 2–1. The changing cave conditions impacted its interior topography and influenced the way sediments (and fossils) were deposited. Preserved combustion biproducts identified in the sediments suggest two possible scenarios, one where small forest fires may have occurred during periods of regional aridity and/or another where humans visited the cave.

1. Introduction
The excavations in Tam Pà Ling (Cave of Monkeys), northeastern Laos (Fig. 1A), have unearthed a fossil assemblage of Homo sapiens that is unique for the study of Late Pleistocene human evolution in Southeast Asia (SEA) (Demeter et al., 2012; Demeter et al., 2015; Demeter et al., 2017; Shackelford et al., 2018; Freidline et al., 2023). The fossil assemblage is formed of a partial cranium (TPL1), two mandibles (TPL2, TPL3), a partial rib (TPL4), a proximal pedal phalanx (TPL5), a partial frontal (TPL6), and a tibial fragment (TPL7), all excavated from a trench situated deep inside the cave. Although disarticulated, the fossils otherwise display minimal evidence of remobilisation or physical abrasion, a rare occurrence from the region (Lee and Hudock, 2021; Sawafuji et al., 2024). As such, the fossils have helped demonstrate the major morphological variations that existed between the different populations of Homo sapiens in SEA during the Late Pleistocene (Demeter et al., 2017), consequently making Tam Pà Ling (TPL) a key site for the study of the evolution and dispersal of our species in the Far East (Matsumura et al., 2019; Demeter and Bae, 2020; Hublin, 2021.1; McAllister et al., 2022; Sawafuji et al., 2024).
Fig. 1. (A) Location of Tam Pà Ling (20°12′33.41"N, 103°24′22.02"E). Red square indicates the study area. (B) Pà Hang hill with Tam Pà Ling and other studied sites labelled (Photograph: P. Duringer) (C) Access to T3 (lit area) (Photograph: V.C. Hernandez). (D) Plan of Tam Pà Ling (Redrawn after J.-L. Ponche and P. Duringer). (E) Studied section showing locations of micromorphological sampling and levels where TPL1, 2, and 5 were recovered (dashed orange line)
Photograph V.C. Hernandez.
The TPL fossils represent some of the earliest evidence for Homo sapiens in continental SEA, deposited in the cave at different times between Marine Isotope Stage (MIS) 5b and MIS 3 (∼87–30 ka) (Freidline et al., 2023). Although some of the fossils have been directly dated via uranium–thorium methods, their dates are reported only as minimum age estimates (Demeter et al., 2012, 2015). This is largely due to the unaccounted profiles of uranium from the sampled deposits, noting that tropical environments hold the potential of enhancing heterogeneous distribution of uranium in bones that are chemically weathered in situ. Hence, the modelled depositional ages (2σ) of the containing sediment matrix are preferred when referring to the age of the fossils, with the oldest returned age estimate being ∼86 ka, supporting a much earlier dispersal of Homo sapiens into SEA than previously known. Details of the modelled depositional chronology of TPL are published in Freidline et al. (2023). Whereas palaeoenvironmental reconstructions of the landscape surrounding TPL have provided some context to understand the early dispersal of Homo sapiens in SEA (Milano et al., 2018.1; Bourgon et al., 2021.2; McAllister-Hayward et al., 2024.1), there is still very little understanding of their presence at the site and in the local catchment, other than the occurrence of the fossils. This largely precludes the development of more detailed scenarios for the early Homo sapiens settlement of Asia (Dennell, 2017.1) and achieving a better understanding of their adaptations to environmental changes in tropical landscapes, which are argued to play an important role in human evolution and dispersals in the deep past (Scerri et al., 2022.1 and references therein). In SEA, such knowledge remains elusive due to the limited evidence from the Pleistocene archaeological record and the current resolution of ages that frame the presence of humans at many of the studied sites.

While the ages of the fossils from TPL are well-constrained, the absence of artefacts or occupation surfaces found to date suggests that humans did not intensively occupy the cave during the Late Pleistocene. However, evidence of human presence and occupation at neighbouring sites spanning the Middle Pleistocene to Late Holocene (Demeter et al., 2009; Patole-Edoumba, 2015.1; Bacon et al., 2021.3; Demeter et al., 2022.2, Fig. 1B), and the presence of the fossils from TPL, suggest that humans may have at least visited sporadically or used the cave in the past, even briefly. If so, then traces of their activities from the entrance or even inside might still be preserved, although likely in small quantities, probably degraded, diagenetically altered, or buried beneath limestone slabs.

The research at TPL has simultaneously highlighted the scientific challenges of understanding archaeological site formation processes in the hot and humid tropics (Morley and Goldberg, 2017.2 and references therein), and the need to better understand geomorphological processes that affect the interpretation and dating of fossils from cave sites (Liu et al., 2015.2; Westaway et al., 2017.3; Yao et al., 2020.1). These challenges are made more difficult by the erratic preservation of organic materials in tropical cave environments (Louys et al., 2017.4 and references therein; Smith et al., 2020.2 and references therein), and therefore demand the systematic evaluation of the stratigraphy of a site with the potential to yield bioarchaeological data (e.g., aDNA, proteins) that can inform about humans and their environments in the past (Massilani et al., 2022.3; Morley et al., 2023.1; Aldeias and Stahlschmidt, 2024.2). It is for these reasons that there is a need to better understand the stratigraphy of TPL at various spatial scales (vertical and horizontal) and at finer resolution, with research from other sites in SEA suggesting a geoarchaeology-focused approach to achieve this (O'Connor et al., 2010; Morley, 2017.5).

Sediment micromorphology (microstratigraphy) is one method employed in geoarchaeological research that can help to better understand the geomorphological and site formation processes governing TPL. Research employing this method to study the critical sites for understanding early human evolution and dispersals in SEA show that microstratigraphy can provide a more nuanced picture of local environments in the past, help to reveal more about human adaptations to the different environmental conditions that existed, and temporally resolve the presence of humans on-site and in the immediate catchment (Stephens et al., 2005, 2017.6; Lewis, 2007; Brasseur et al., 2015.3; Mijares, 2017.7; Morley et al., 2017.8; McAdams et al., 2020.3; Anderson et al., 2024.3; Shipton et al., 2024.4). With these in mind, a program of microstratigraphic analysis at TPL was initiated to gain further insights into the history of the site and the taphonomy of the Homo sapiens fossils recovered from there.

To improve the understanding of the history of the site and taphonomy of Homo sapiens fossils recovered from TPL we link the results of the microstratigraphic analysis with loss-on-ignition (LOI) and magnetic susceptibility (χ) analysis of sediments. Both methods provide quick to obtain and accurate determinations of geochemical characteristics that can complement the interpretation of the microstratigraphic record (Stoops, 1978; Macphail and Goldberg, 2017.9). LOI, for instance, has complemented microstratigraphic analysis of archaeological cave sites in Malaysia, northern Vietnam and Thailand, resulting in a clearer understanding of the depositional environments that existed in these caves in the past (Hunt et al., 2007.1; Stephens et al., 2016; McAdams et al., 2020.3; Saminpanya and Denkitkul, 2020.4). While χ has been used at TPL to infer moisture availability that helped to reconstruct the vegetation surrounding the cave during the Late Pleistocene (Milano et al., 2018.1) and allowed insights into the timing of sediment delivery into the cave during periods of strengthened monsoons (Freidline et al., 2023). By linking the results of these analyses with that of the microstratigraphy, it is hoped that a clearer understanding of site formation and better explanation of the presence of humans at TPL is achieved.

Here, we present the results of the program to analyse the microstratigraphy, LOI and χ of sediments in TPL. Our geoarchaeological work aims to prove the efficacy of a microstratigraphic approach to understanding the important stratigraphy of the site by reconstructing its ground conditions, clarifying the taphonomic history of the fossils related to the depositional history of the cave, and exploring the potential archaeology within its sediments. By doing so, we try to resolve how past conditions in TPL (sediment, cave, and catchment) affect the interpretation of human presence at the site and explore how this information changes the narrative of Late Pleistocene human evolution and dispersals in the Far East. We focus the analyses on the upper 4 m Late Pleistocene–Holocene sediment sequence exposed in the 7 m-deep excavation inside the cave. This upper sequence was securely dated to between 46 ± 6 ka and 13 ± 3 ka (Freidline et al., 2023) and was where the human fossils TPL1, 2 and 5 were recovered (Demeter et al., 2012, Demeter et al., 2015, Demeter et al., 2017).
The refutation of creationism continues unabated. Not only were there people living in South East Asia tens of thousands of years before creationists think Earth was created by magic, but the remains proving it were washed into the cave by a local flood, which, had it been anything resembling creationism's favourite genocidal flood, would also have washed in non-local debris. And that simply never happened, then or later.

And, to make it doubly difficult for creationists to explain without the usual lies and misrepresentations of the dating methods used, the authors have allowed for possible errors by using the minimum ages of the fossils. In other words, if creationists are right about errors in the dating methods, these fossils are even older than creationists dogma says they should be.

And so creationism staggers on under the load of yet more evidence that it is just a childish fairytale.

Saturday, 5 October 2024

Refuting Creationism - How Pterosaurs Became Flying Giants - 252-66 Million Years Before 'Creation Week'


Life restoration of a group of giant azhdarchids, Quetzalcoatlus northropi, foraging on a Cretaceous fern prairie.
A juvenile titanosaur has been procured by one pterosaur, while the others stalk through the scrub in search of small vertebrates and other foodstuffs.
Pterosaurs needed feet on the ground to become giants | News | University of Leicester

New research by scientists led by the University of Leicester has filled in another of those gaps much sought after by creationists as somewhere to fit their ever-shrinking little god. The gap was in our understanding of how and when the pterosaurs evolved to their gigantic size from their small beginnings.

Because this took place over the almost 190 million years that pterosaurs were around before going extinct, along with the dinosaurs, 66 million years ago, most creationists will probably have ignored it because it all happened so long before 'Creation Week'. Any reference to gaps in the fossil record that long ago will mean simultaneously holding two mutually exclusive views about the age of Earth, with all the painful cognitive dissonance that entails, so creationists frauds will most likely have kept quiet about it if they were even aware of it.

Friday, 4 October 2024

Refuting Creationism - Living Bacteria Sealed Inside 2 Billion-Year-Old Rock


2-billion-year-old rock home to living microbes | The University of Tokyo

The Bushveld Igneous Complex (BIC), South Africa.
This picture shows a very famous outcrop where nearly horizontal black and white layers are observed. The BIC made of layers of igneous rock in a basin shape, formed over a period of about 1 million years, after which it seems to have barely changed.
© Y. Suzuki.
In today's incidental rebuttal of creationist dogma, archaeologists have discovered living colonies of microbes sealed within cracks in 2-billion-year-old rocks from South Africa.

The microbes became sealed in the cracks by tightly-packed layers of clay so effectively creating sealed chambers from which nothing could escape and, more importantly, nothing could enter. They have survived over geological time by firstly having an extremely low metabolic rate, with a generation time measured in thousands, even millions of years, compared to surface-dwelling microbes with generation times in hours or minutes, and by utilising sulphates as their energy source.

What they demonstrate, apart from the fallacy of Earth only being made by magic 10,000 years ago, is that in a highly stable environment, a plentiful source of energy and the ability to recycle their dead with almost no loss of energy, there is no environmental pressure to evolve, so the microbes have remained virtually unchanged for hundreds of millions, even billions of years.

Wednesday, 25 September 2024

Refuting Creationism - An Improved Method For Analysing Ancient Microfossils To Discover How Life Evolved


Research News - Unveiling Ancient Life: New Method Sheds Light on Early Cellular and Metabolic Evolution | Tohoku University Global Site

One of the clutch of science publications which casually and unintentionally refute creationism to be published today, comes in the form of a paper by a team from the University of Tokyo, Tohoku University and Kochi University, Japan, which describes a new method for analysing ancient microfossils, and so discovering more about how key processes evolved in early cellular life.

The purpose of this is to discover not whether (that is never in doubt) but the precise details of how and when these key processes evolved.

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