When did populations of Homo sapiens first arrive in China and what happened when they encountered the Denisovans or Neanderthals who lived there? A new study by an international team of researchers opens a window into hunter-gatherer lifestyles 40,000 years ago. Archaeological excavations at the site of Xiamabei in the Nihewan Basin of northern China have revealed the presence of innovative behaviors and unique toolkits.In other words, not a single founding couple or even a single founding species a few thousand years ago, let alone a culture derived from a small area of the Middle East, as Creationist dogma dictates their cult members believe, but a species and culture derived from hybrids and cross fertilisation of species that had been in existence for well over the 40,000 before they came into contact in China.
The discovery of a new culture suggests processes of innovation and cultural diversification occurring in Eastern Asia during a period of genetic and cultural hybridization. Although previous studies have established that Homo sapiens arrived in northern Asia by about 40,000 years ago, much about the lives and cultural adaptations of these early peoples, and their possible interactions with archaic groups, remains unknown. In the search for answers, the Nihewan Basin in northern China, with a wealth of archaeological sites ranging in age from 2 million to 10,000 years ago, provides one of the best opportunities for understanding the evolution of cultural behavior in northeastern Asia.
A new study describes a unique 40,000-year-old culture at the site of Xiamabei in the Nihewan Basin. With the earliest known evidence of ochre processing in Eastern Asia and a set of distinct blade-like stone tools, Xiamabei contains cultural expressions and features that are unique or exceedingly rare in northeastern Asia. Through the collaboration of an international team of scholars, analysis of the finds offers important new insights into cultural innovation during the expansion of Homo sapiens populations.
Xiamabei stands apart from any other known archaeological site in China, as it possesses a novel set of cultural characteristics at an early date.
Fa-Gang Wang, co-lead author
Hebei Provincial Institute of Cultural Relics and Archaeology
Shijiazhuang, China.Cultural adaptations at XiamabeiOchre pieces and stone processing equipment laying on a red-stained pigment patch.© Fa-Gang Wang, Francesco d’Errico / Wang et al. (2022)
One of the significant cultural features found at Xiamabei is the extensive use of ochre, as shown by artefacts used to process large quantities of pigment. The artefacts include two pieces of ochre with different mineral compositions and an elongated limestone slab with smoothed areas bearing ochre stains, all on a surface of red-stained sediment. Analysis by researchers from the University of Bordeaux, led by Francesco d’Errico, indicates that different types of ochre were brought to Xiamabei and processed through pounding and abrasion to produce powders of different color and consistency, the use of which impregnated the habitation floor. Ochre production at Xiamabei represents the earliest known example of this practice in Eastern Asia.The ability of hominins to live in northern latitudes, with cold and highly seasonal environments, was likely facilitated by the evolution of culture in the form of economic, social and symbolic adaptations. The finds at Xiamabei are helping us to understand these adaptations and their potential role in human migration.
Shixia Yang, co-lead author
Chinese Academy of Sciences, Beijing, China And the Max Planck Institute for the Science of Human History
Jena, Germany.
The stone tools at Xiamabei represent a novel cultural adaptation for northern China 40,000 years ago. Because little is known about stone tool industries in Eastern Asia until microblades became the dominant technology about 29,000 years ago, the Xiamabei finds provide important insights into toolmaking industries during a key transition period. The blade-like stone tools at Xiamabei were unique for the region, with the large majority of tools being miniaturized, more than half measuring less than 20 millimeters. Seven of the stone tools showed clear evidence of hafting to a handle, and functional and residue analysis suggests tools were used for boring, hide scraping, whittling plant material and cutting soft animal matter. The site inhabitants made hafted and multipurpose tools, demonstrative of a complex technical system for transforming raw materials not seen at older or slightly younger sites.Extraordinarily well preserved bladelet showingmicroscopic evidence of a bone handle, plant fibres used for binding, and plant polish produced by whittling action.© Andreu Oll / Wang et al. (2022)
A complex history of innovationOur findings show that current evolutionary scenarios are too simple, and that modern humans, and our culture, emerged through repeated but differing episodes of genetic and social exchanges over large geographic areas, rather than as a single, rapid dispersal wave across Asia.
Michael Petraglia, co-corresponding author
Max Planck Institute
Jena, Germany
The record emerging from Eastern Asia shows that a variety of adaptations were taking place as modern humans entered the region roughly 40,000 years ago. Although no hominin remains were found at Xiamabei, the presence of modern human fossils at the contemporary site of Tianyuandong and the slightly younger sites of Salkhit and Zhoukoudian Upper Cave, suggests that the visitors to Xiamabei were Homo sapiens. A varied lithic technology and the presence of some innovations, such as hafted tools and ochre processing, but not other innovations, such as formal bone tools or ornaments, may reflect an early colonization attempt by modern humans. This colonization period may have included genetic and cultural exchanges with archaic groups, such as the Denisovans, before ultimately being replaced by later waves of Homo sapiens using microblade technologies.
Given the unique nature of Xiamabei, the authors of the new paper argue that the archaeological record does not fit with the idea of continuous cultural innovation, or of a fully formed set of adaptations which enabled early humans to expand out of Africa and around the world. Instead, the authors argue that we should expect to find a mosaic of innovation patterns, with the spread of earlier innovations, the persistence of local traditions, and the local invention of new practices all taking place in a transitional phase.
URBANA, Ill. – It was the height of summer 2022 when the calls started coming in. Scores of dead deer suddenly littered rural properties and park preserves, alarming the public and inconveniencing landowners. According to officials at the Urbana Park District, it was Epizootic Hemorrhagic Disease (EHD), a midge-borne viral illness that pops up in white-tailed deer populations around the state every few years. And when susceptible deer are infected, they die within days.
Now, University of Illinois scientists have found gene variants in deer associated with the animals’ susceptibility to EHD.
The team sequenced the gene for Toll-Like Receptor 3 (TLR3), a protein that spans membranes of intracellular organelles in immune cells and helps recognize double-stranded RNA (dsRNA) viruses. When a dsRNA virus, such as the one that causes EHD, enters the cell, TLR3 activates the host’s first immune defenses, triggering inflammation and priming the rest of the immune system.This is the first time this gene has been sequenced completely in white-tailed deer. This is important because without the sequences, there's no starting point to do any kind of research.
Professor Alfred Roca, c-author
Department of Animal Sciences
College of Agricultural, Consumer and Environmental Sciences (ACES)
University of Illinois, Urbana-Champaign, USA.
When the team sequenced TLR3 from EHD-infected and uninfected deer, they found dozens of variable sites in the DNA known as single-nucleotide polymorphisms (SNPs). Two of the SNPs were significantly more common in uninfected deer.
That conclusion is rooted in the probability that many white-tailed deer in Illinois are exposed to EHD in their lifetimes, but only some will die from the disease.Because we found mutations in TLR3 more frequently in EHD-negative animals, we think deer with these mutations are less susceptible to EHD.
Yasuko Ishida, co-author
Department of Animal Sciences
University of Illinois, Urbana-Champaign, USA.
In many areas, outbreaks occur every 3-5 years, when environmental conditions favor the life cycle of midges that carry the virus. The midges spend their larval stages in mud under ponds and puddles where deer drink during drought conditions. As those water sources dry up, usually during late summer, the midges’ muddy habitat is exposed and the adult flies emerge to bite and infect deer. The cycle can be interrupted locally by a soaking rain or a cold snap, which is why outbreaks don’t happen every year.
The researchers emphasize that EHD is not transmissible to humans or pets through midge bites or consumption of infected deer meat.
Although there’s not much wildlife managers can do to disrupt the cycle and prevent outbreaks in natural habitats, the team says it’s still helpful to understand the genetic underpinnings of the disease. Theoretically, deer in captive herds could be sampled to characterize the level of vulnerability to EHD, and wild herds could be sampled during the hunting and EHD-outbreak seasons, informing managers and the public of future risk.
The value of this research is that it helps inform the public about EHD. It helps them to understand not only what the disease will look like, but potentially the severity of an outbreak in a particular area. Sometimes there's value in knowing what to expect.
Nohra Mateus-Pinilla, co-author
Wildlife veterinary epidemiologist
Illinois Natural History Survey
And the Department of Animal Sciences
The Department of Natural Resources and Environmental Sciences in ACES
And the Department of Pathobiology
University of Illinois, Urbana-Champaign, USA.Considering the disease’s episodic nature, it’s not likely to present as a severe outbreak again in Urbana parks anytime soon. But it is an increasing threat to the state’s northern regions, including Chicagoland. Another recent study by Mateus-Pinilla, Roca, and others shows the disease has been slowly but steadily moving northward in Illinois. The researchers don’t know whether that’s due to climate change or greater reporting, but it’s clear EHD isn’t restricted to rural parts of Illinois.It’s very complicated to respond to an outbreak of EHD because there are often large numbers of deer found dead near water. People don’t know what to do when that happens, but we encourage the public to report potential EHD outbreaks to their local IDNR wildlife biologist for the surveillance and future study of the disease.
Jacob Wessels, first author
Now a conservation police officer with the Illinois Department of Natural Resources
The article, “The Impact of Variation in the Toll-like Receptor 3 Gene on Epizootic Hemorrhagic Disease in Illinois Wild White-tailed Deer (Odocoileus virginianus),” is published in Genes [DOI: 10.3390/genes14020426].
AbstractThese examples of how the childish Creationist notion of intelligent [sic] design simply makes no sense at all, are almost daily occurrences in biological science, as are the examples of evolution in progress that we see in this example of natural selection favouring immunity to a viral parasite. The basic problem with Creationism and Creationists is that facts and deductive logic are irrelevant, otherwise there wouldn’t be Creationism and Creationists.
Epizootic hemorrhagic disease (EHD) leads to high mortality in white-tailed deer (Odocoileus virginianus) and is caused by a double-stranded RNA (dsRNA) virus. Toll-like receptor 3 (TLR3) plays a role in host immune detection and response to dsRNA viruses. We, therefore, examined the role of genetic variation within the TLR3 gene in EHD among 84 Illinois wild white-tailed deer (26 EHD-positive deer and 58 EHD-negative controls). The entire coding region of the TLR3 gene was sequenced: 2715 base pairs encoding 904 amino acids. We identified 85 haplotypes with 77 single nucleotide polymorphisms (SNPs), of which 45 were synonymous mutations and 32 were non-synonymous. Two non-synonymous SNPs differed significantly in frequency between EHD-positive and EHD-negative deer. In the EHD-positive deer, phenylalanine was relatively less likely to be encoded at codon positions 59 and 116, whereas leucine and serine (respectively) were detected less frequently in EHD-negative deer. Both amino acid substitutions were predicted to impact protein structure or function. Understanding associations between TLR3 polymorphisms and EHD provides insights into the role of host genetics in outbreaks of EHD in deer, which may allow wildlife agencies to better understand the severity of outbreaks.
Wessels JE, Ishida Y, Rivera NA, Stirewalt SL, Brown WM, Novakofski JE, Roca AL, Mateus-Pinilla NE.
The Impact of Variation in the Toll-like Receptor 3 Gene on Epizootic Hemorrhagic Disease in Illinois Wild White-Tailed Deer (Odocoileus virginianus).
Genes. 2023; 14(2):426. https://doi.org/10.3390/genes14020426
Copyright: © 2023 The authors.
Published by MDPI, Basel, Switzerland. Open access
Reprinted under a Creative Commons Attribution 4.0 International license (CC BY 4.0)
A big step forward in vertebrate cognitive function researchThe research and its significance are explained in the team's open access paper in PNAS:
A research team led by Specially Appointed Professor Masanori Kohda from the Graduate School of Science at the Osaka Metropolitan University has demonstrated that fish think “it’s me” when they see themselves in a picture, for the first time in animals. The researchers found that the determining factor was not seeing their own body but seeing their face. These findings have been published in the Proceedings of the National Academy of Sciences.
In this study, relevant experiments were conducted with Labroides dimidiatus, commonly known as a cleaner fish, which are known to be able to recognize themselves in mirrors and regularly attack other unfamiliar cleaner fish who intrude on their territory. Each cleaner fish was presented with four photographs: a photo of themselves; a photo of an unfamiliar cleaner; a photo of their own face on an unfamiliar cleaner’s body; and a photo of unfamiliar cleaner’s face on their own body. Interestingly, the cleaner fish did not attack photos with their own faces but did attack those with the faces of unfamiliar cleaner fish. Together these results indicate that the cleaner fish determined who was in the photograph based on the face in the photo but not the body in the similar way humans do.This study is the first to demonstrate that fish have an internal sense of self. Since the target animal is a fish, this finding suggests that nearly all social vertebrates also have this higher sense of self.
Professor Masanori Kohda, lead author
Laboratory of Animal Sociology
Department of Biology and Geosciences
Graduate School of Science
Osaka City University, Osaka, Japan
To negate the possibility that the fish considered photographs of themselves as very close companions, a photograph mark-test was conducted. Fish were presented with a photograph where a parasite-like mark was placed on their throat. Six of the eight individuals that saw the photograph of themselves with a parasite mark were observed to rub their throats to clean it off. While showing those same fish pictures of themselves without parasite marks or of a familiar cleaner fish with parasite marks did not cause them to rub their throats.
SignificanceIt's worth repeating what Professor Kohda said: because this ability is present in a fish, it is likely to be present in all social vertebrates - a far cry from what Creationist frauds tell their credulous dupes to make them feel special.
Some animals have the capacity for mirror self-recognition, but implications for self-awareness remain controversial. Here, we show that cleaner fish, Labroides dimidiatus, likely recognize their own mirror image using a mental image of the self-face comparable to humans. Mirror-naïve fish frequently attacked photographs of both themselves and strangers. In contrast, after passing the mirror test, aggression against their own photograph and composite photographs of own face/stranger body declined, but aggression remained toward unfamiliar and composite photographs of stranger face/own body. Our results suggest that cleaner fish with MSR ability can recognize their own mirror image based on a mental image of their own face, rather than by comparing body movements in the mirror. This study demonstrates how animals recognize self-images.
Abstract
Some animals have the remarkable capacity for mirror self-recognition (MSR), yet any implications for self-awareness remain uncertain and controversial. This is largely because explicit tests of the two potential mechanisms underlying MSR are still lacking: mental image of the self and kinesthetic visual matching. Here, we test the hypothesis that MSR ability in cleaner fish, Labroides dimidiatus, is associated with a mental image of the self, in particular the self-face, like in humans. Mirror-naive fish initially attacked photograph models of both themselves and unfamiliar strangers. In contrast, after all fish had passed the mirror mark test, fish did not attack their own (motionless) images, but still frequently attacked those of unfamiliar individuals. When fish were exposed to composite photographs, the self-face/unfamiliar body were not attacked, but photographs of unfamiliar face/self-body were attacked, demonstrating that cleaner fish with MSR capacity recognize their own facial characteristics in photographs. Additionally, when presented with self-photographs with a mark placed on the throat, unmarked mirror-experienced cleaner fish demonstrated throat-scraping behaviors. When combined, our results provide clear evidence that cleaner fish recognize themselves in photographs and that the likely mechanism for MSR is associated with a mental image of the self-face, not a kinesthetic visual-matching model. Humans are also capable of having a mental image of the self-face, which is considered an example of private self-awareness. We demonstrate that combining mirror test experiments with photographs has enormous potential to further our understanding of the evolution of cognitive processes and private self-awareness across nonhuman animals.
Kohda, Masanori; Bshary, Redouan; Kubo, Naoki; Awata, Satoshi; Sowersby, Will; Kawasaka, Kento; Kobayashi, Taiga; Sogawa, Shumpei
Cleaner fish recognize self in a mirror via self-face recognition like humans
Proceedings of the National Academy of Sciences; 2023, 120(7), e2208420120. DOI: 10.1073/pnas.2208420120
Published by PNAS. Open access
Reprinted under a Creative Commons Attribution 4.0 International license (CC BY 4.0)
(A) Walking phase.
(B) Horizontal flight.
(C) Vertical flight.
