#pnas — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #pnas, aggregated by home.social.
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https://www.europesays.com/ie/591749/ Honey Bees’ Sense of Smell Changes From Larval to Adult Life Stages, Study Finds #AllJournalNews #Bee;honeyBee;Smell;socialEvolution;Entomology #biotech #CellBiology #CollegeOfLiberalArtsAndSciences #Éire #EvolutionAndDarwin #FoodScience #IE #Ireland #nature #Newswise #PNAS #Science #UniversityOfIllinoisUrbanaChampaign
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https://www.europesays.com/at/250259/ 40-Hertz-Schall als Alzheimer-Ansatz: Ablagerungen doppelt so schnell abtransportieren #AI #Alzheimer #ARTIFICIALINTELLIGENCE #AT #Austria #Biomarker #Bluttest #Diagnostik #Gesundheit #Health #KI #Kognition #KünstlicheIntelligenz #Liquor #Medizin #Österreich #Pnas #Prävention #Risiko #Schall #Sicherheit #Studie #Therapie #Ultraschall
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DATE: June 30, 2026 at 10:00AM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Researchers discover a neural bridge between fear and physical reactions
New research reveals how different regions of the brain synchronize to connect the memory of a frightening event with the physical reaction it triggers. The discovery highlights a collaborative mechanism between two sides of the hippocampus during fear learning as groups of nerve cells coordinate their firing patterns. The findings were published in PNAS.
Research has historically divided the hippocampus into two functional halves. The top half, known as the dorsal region, was typically associated with mapping physical spaces and remembering contexts. The bottom half, called the ventral region, was thought to handle emotional processing and anxiety states.
These distinct roles are both necessary when an animal learns to fear a specific threat. The brain must encode the emotional weight of the danger while also remembering the environment where it occurred. Researchers have only recently begun to ask how these two distinct halves communicate to produce a cohesive memory of fear.
Marco N. Pompili, a neuroscientist at Aix-Marseille University, led the investigation alongside colleagues Noé Hamou and Sidney I. Wiener at the Collège de France. The team set out to directly compare the electrical activity in both halves of the rat hippocampus. They wanted to see if and how the two regions might combine their specific capacities during moments of stress.
To investigate this, the researchers continuously monitored individual nerve cells in four male rats. The animals wore a custom-built apparatus holding dozens of microscopic twisted wires. These wires were thin enough to pick up the faint electrical impulses from individual neurons without damaging the surrounding brain tissue.
Before any negative events occurred, the rats spent two days exploring the testing enclosures. They listened to audio tones without any negative consequences. This habituation phase established a baseline measurement for both their physical movement and their standard brain activity.
During this early phase, the animals occasionally stopped moving and rested. The researchers noted that this resting behavior looked physically similar to fearful freezing. By recording the baseline neural activity during true rest, the researchers could distinguish it from the brain activity of genuine terror later on.
The actual conditioning phase took place in a specific square box. The researchers played a warning tone for the rats, immediately followed by a mild foot shock. The animals quickly associated the sound with the unpleasant sensation.
In response to the association, the rats began to display a defensive behavior called freezing. Freezing is an evolutionary reaction where an animal remains completely immobile, serving as a biological indicator of fear expression.
During the test, the team had to account for basic movement altering the brain signals. The dorsal hippocampus is known to change its firing rate based purely on how fast an animal is walking. To ensure their results were accurate, the research team used mathematical formulas to subtract any changes in nerve cell activity caused simply by fluctuations in walking speed.
After filtering out the effects of basic movement, the unique responses to the fear conditioning emerged. The recorded brain activity shifted across the entire hippocampus as the rats learned to predict the shock. In the ventral region, nerve cells began firing rapidly in direct response to the warning tone.
This heightened firing confirmed the traditional expectation for the bottom half of the hippocampus. The ventral area processes the emotional meaning of a learned threat, reacting strongly to the cue that predicts pain.
However, the dorsal region of the hippocampus provided an unexpected result. Nerve cells in this upper area strongly altered their activity during the actual moments when the rats were frozen in fear. The neurons largely reduced their firing rates during this physical expression of terror, acting as a direct mirror to the behavioral state.
This discovery challenges older models of brain function because it shows that the dorsal hippocampus is not just a spatial map. Instead, it actively represents the physical state of fear expression, responding directly to the behavioral reality of the animal. It provides a more comprehensive representation of the animal’s state than previously believed.
The most striking discovery occurred when the researchers looked at how these two regions interacted with each other. They identified tight groups of neurons that fired in precise synchrony across both the top and bottom halves of the hippocampus. These synchronous groups are known as cell assemblies.
To find these cell assemblies, the team used advanced mathematical algorithms similar to tools designed to isolate individual voices in a crowded room. This allowed them to detect faint patterns of synchronized firing hidden within the noise of hundreds of active brain cells. The algorithms successfully picked out groups of neurons that consistently spiked in unison.
These mixed assemblies acted as brief bridges between the two distinct brain regions. They contained ventral nerve cells that were responding to the warning tone alongside dorsal nerve cells that were responding to the freezing behavior. By firing together at the exact same millisecond, these individual cells created a unified brain network.
A single mixed assembly could theoretically bind the emotional memory of a threat to the physical response it demands. The researchers suggest this bridging mechanism allows the brain to build a multifaceted record of a frightening experience. The brain can coordinate what happened, the emotional weight of the event, and what the body did to survive.
The brain must rapidly link the recognition of a threat with a defensive physical state. The coordinated firing of these mixed cell assemblies provides a biological pathway for that rapid connection. It indicates the hippocampus functions as an integrated whole rather than two isolated compartments.
The study relies entirely on male rats, which presents a basic limitation. Biological differences between sexes can influence brain activity and learning processes. The authors note that future research must include female rodents to confirm if these brain synchronization patterns are universal.
Additionally, observing the synchronization of these cell assemblies does not prove that they directly command the animal to freeze. The researchers suggest that future experiments could artificially trigger these synchronized cell groups using optogenetics or other precise stimulation tools. This would clarify whether the assemblies merely record the fearful experience or actively drive the animal’s physical behavior.
The study, “Integration of fear learning and fear expression across the dorsoventral axis of the hippocampus,” was authored by Marco N. Pompili, Noé Hamou, and Sidney I. Wiener.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
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#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FearLearning #Hippocampus #NeuralSynchronization #DorsalVsVentralHippocampus #CellAssemblies #FearExpression #NeuroscienceNews #BrainResearchers #PNAS #NeuralBridges
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DATE: June 30, 2026 at 10:00AM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Researchers discover a neural bridge between fear and physical reactions
New research reveals how different regions of the brain synchronize to connect the memory of a frightening event with the physical reaction it triggers. The discovery highlights a collaborative mechanism between two sides of the hippocampus during fear learning as groups of nerve cells coordinate their firing patterns. The findings were published in PNAS.
Research has historically divided the hippocampus into two functional halves. The top half, known as the dorsal region, was typically associated with mapping physical spaces and remembering contexts. The bottom half, called the ventral region, was thought to handle emotional processing and anxiety states.
These distinct roles are both necessary when an animal learns to fear a specific threat. The brain must encode the emotional weight of the danger while also remembering the environment where it occurred. Researchers have only recently begun to ask how these two distinct halves communicate to produce a cohesive memory of fear.
Marco N. Pompili, a neuroscientist at Aix-Marseille University, led the investigation alongside colleagues Noé Hamou and Sidney I. Wiener at the Collège de France. The team set out to directly compare the electrical activity in both halves of the rat hippocampus. They wanted to see if and how the two regions might combine their specific capacities during moments of stress.
To investigate this, the researchers continuously monitored individual nerve cells in four male rats. The animals wore a custom-built apparatus holding dozens of microscopic twisted wires. These wires were thin enough to pick up the faint electrical impulses from individual neurons without damaging the surrounding brain tissue.
Before any negative events occurred, the rats spent two days exploring the testing enclosures. They listened to audio tones without any negative consequences. This habituation phase established a baseline measurement for both their physical movement and their standard brain activity.
During this early phase, the animals occasionally stopped moving and rested. The researchers noted that this resting behavior looked physically similar to fearful freezing. By recording the baseline neural activity during true rest, the researchers could distinguish it from the brain activity of genuine terror later on.
The actual conditioning phase took place in a specific square box. The researchers played a warning tone for the rats, immediately followed by a mild foot shock. The animals quickly associated the sound with the unpleasant sensation.
In response to the association, the rats began to display a defensive behavior called freezing. Freezing is an evolutionary reaction where an animal remains completely immobile, serving as a biological indicator of fear expression.
During the test, the team had to account for basic movement altering the brain signals. The dorsal hippocampus is known to change its firing rate based purely on how fast an animal is walking. To ensure their results were accurate, the research team used mathematical formulas to subtract any changes in nerve cell activity caused simply by fluctuations in walking speed.
After filtering out the effects of basic movement, the unique responses to the fear conditioning emerged. The recorded brain activity shifted across the entire hippocampus as the rats learned to predict the shock. In the ventral region, nerve cells began firing rapidly in direct response to the warning tone.
This heightened firing confirmed the traditional expectation for the bottom half of the hippocampus. The ventral area processes the emotional meaning of a learned threat, reacting strongly to the cue that predicts pain.
However, the dorsal region of the hippocampus provided an unexpected result. Nerve cells in this upper area strongly altered their activity during the actual moments when the rats were frozen in fear. The neurons largely reduced their firing rates during this physical expression of terror, acting as a direct mirror to the behavioral state.
This discovery challenges older models of brain function because it shows that the dorsal hippocampus is not just a spatial map. Instead, it actively represents the physical state of fear expression, responding directly to the behavioral reality of the animal. It provides a more comprehensive representation of the animal’s state than previously believed.
The most striking discovery occurred when the researchers looked at how these two regions interacted with each other. They identified tight groups of neurons that fired in precise synchrony across both the top and bottom halves of the hippocampus. These synchronous groups are known as cell assemblies.
To find these cell assemblies, the team used advanced mathematical algorithms similar to tools designed to isolate individual voices in a crowded room. This allowed them to detect faint patterns of synchronized firing hidden within the noise of hundreds of active brain cells. The algorithms successfully picked out groups of neurons that consistently spiked in unison.
These mixed assemblies acted as brief bridges between the two distinct brain regions. They contained ventral nerve cells that were responding to the warning tone alongside dorsal nerve cells that were responding to the freezing behavior. By firing together at the exact same millisecond, these individual cells created a unified brain network.
A single mixed assembly could theoretically bind the emotional memory of a threat to the physical response it demands. The researchers suggest this bridging mechanism allows the brain to build a multifaceted record of a frightening experience. The brain can coordinate what happened, the emotional weight of the event, and what the body did to survive.
The brain must rapidly link the recognition of a threat with a defensive physical state. The coordinated firing of these mixed cell assemblies provides a biological pathway for that rapid connection. It indicates the hippocampus functions as an integrated whole rather than two isolated compartments.
The study relies entirely on male rats, which presents a basic limitation. Biological differences between sexes can influence brain activity and learning processes. The authors note that future research must include female rodents to confirm if these brain synchronization patterns are universal.
Additionally, observing the synchronization of these cell assemblies does not prove that they directly command the animal to freeze. The researchers suggest that future experiments could artificially trigger these synchronized cell groups using optogenetics or other precise stimulation tools. This would clarify whether the assemblies merely record the fearful experience or actively drive the animal’s physical behavior.
The study, “Integration of fear learning and fear expression across the dorsoventral axis of the hippocampus,” was authored by Marco N. Pompili, Noé Hamou, and Sidney I. Wiener.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FearLearning #Hippocampus #NeuralSynchronization #DorsalVsVentralHippocampus #CellAssemblies #FearExpression #NeuroscienceNews #BrainResearchers #PNAS #NeuralBridges
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DATE: June 30, 2026 at 10:00AM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Researchers discover a neural bridge between fear and physical reactions
New research reveals how different regions of the brain synchronize to connect the memory of a frightening event with the physical reaction it triggers. The discovery highlights a collaborative mechanism between two sides of the hippocampus during fear learning as groups of nerve cells coordinate their firing patterns. The findings were published in PNAS.
Research has historically divided the hippocampus into two functional halves. The top half, known as the dorsal region, was typically associated with mapping physical spaces and remembering contexts. The bottom half, called the ventral region, was thought to handle emotional processing and anxiety states.
These distinct roles are both necessary when an animal learns to fear a specific threat. The brain must encode the emotional weight of the danger while also remembering the environment where it occurred. Researchers have only recently begun to ask how these two distinct halves communicate to produce a cohesive memory of fear.
Marco N. Pompili, a neuroscientist at Aix-Marseille University, led the investigation alongside colleagues Noé Hamou and Sidney I. Wiener at the Collège de France. The team set out to directly compare the electrical activity in both halves of the rat hippocampus. They wanted to see if and how the two regions might combine their specific capacities during moments of stress.
To investigate this, the researchers continuously monitored individual nerve cells in four male rats. The animals wore a custom-built apparatus holding dozens of microscopic twisted wires. These wires were thin enough to pick up the faint electrical impulses from individual neurons without damaging the surrounding brain tissue.
Before any negative events occurred, the rats spent two days exploring the testing enclosures. They listened to audio tones without any negative consequences. This habituation phase established a baseline measurement for both their physical movement and their standard brain activity.
During this early phase, the animals occasionally stopped moving and rested. The researchers noted that this resting behavior looked physically similar to fearful freezing. By recording the baseline neural activity during true rest, the researchers could distinguish it from the brain activity of genuine terror later on.
The actual conditioning phase took place in a specific square box. The researchers played a warning tone for the rats, immediately followed by a mild foot shock. The animals quickly associated the sound with the unpleasant sensation.
In response to the association, the rats began to display a defensive behavior called freezing. Freezing is an evolutionary reaction where an animal remains completely immobile, serving as a biological indicator of fear expression.
During the test, the team had to account for basic movement altering the brain signals. The dorsal hippocampus is known to change its firing rate based purely on how fast an animal is walking. To ensure their results were accurate, the research team used mathematical formulas to subtract any changes in nerve cell activity caused simply by fluctuations in walking speed.
After filtering out the effects of basic movement, the unique responses to the fear conditioning emerged. The recorded brain activity shifted across the entire hippocampus as the rats learned to predict the shock. In the ventral region, nerve cells began firing rapidly in direct response to the warning tone.
This heightened firing confirmed the traditional expectation for the bottom half of the hippocampus. The ventral area processes the emotional meaning of a learned threat, reacting strongly to the cue that predicts pain.
However, the dorsal region of the hippocampus provided an unexpected result. Nerve cells in this upper area strongly altered their activity during the actual moments when the rats were frozen in fear. The neurons largely reduced their firing rates during this physical expression of terror, acting as a direct mirror to the behavioral state.
This discovery challenges older models of brain function because it shows that the dorsal hippocampus is not just a spatial map. Instead, it actively represents the physical state of fear expression, responding directly to the behavioral reality of the animal. It provides a more comprehensive representation of the animal’s state than previously believed.
The most striking discovery occurred when the researchers looked at how these two regions interacted with each other. They identified tight groups of neurons that fired in precise synchrony across both the top and bottom halves of the hippocampus. These synchronous groups are known as cell assemblies.
To find these cell assemblies, the team used advanced mathematical algorithms similar to tools designed to isolate individual voices in a crowded room. This allowed them to detect faint patterns of synchronized firing hidden within the noise of hundreds of active brain cells. The algorithms successfully picked out groups of neurons that consistently spiked in unison.
These mixed assemblies acted as brief bridges between the two distinct brain regions. They contained ventral nerve cells that were responding to the warning tone alongside dorsal nerve cells that were responding to the freezing behavior. By firing together at the exact same millisecond, these individual cells created a unified brain network.
A single mixed assembly could theoretically bind the emotional memory of a threat to the physical response it demands. The researchers suggest this bridging mechanism allows the brain to build a multifaceted record of a frightening experience. The brain can coordinate what happened, the emotional weight of the event, and what the body did to survive.
The brain must rapidly link the recognition of a threat with a defensive physical state. The coordinated firing of these mixed cell assemblies provides a biological pathway for that rapid connection. It indicates the hippocampus functions as an integrated whole rather than two isolated compartments.
The study relies entirely on male rats, which presents a basic limitation. Biological differences between sexes can influence brain activity and learning processes. The authors note that future research must include female rodents to confirm if these brain synchronization patterns are universal.
Additionally, observing the synchronization of these cell assemblies does not prove that they directly command the animal to freeze. The researchers suggest that future experiments could artificially trigger these synchronized cell groups using optogenetics or other precise stimulation tools. This would clarify whether the assemblies merely record the fearful experience or actively drive the animal’s physical behavior.
The study, “Integration of fear learning and fear expression across the dorsoventral axis of the hippocampus,” was authored by Marco N. Pompili, Noé Hamou, and Sidney I. Wiener.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FearLearning #Hippocampus #NeuralSynchronization #DorsalVsVentralHippocampus #CellAssemblies #FearExpression #NeuroscienceNews #BrainResearchers #PNAS #NeuralBridges
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2027--which is likely to coincide with the mature phase of a major El Niño event--is likely to set a new global temperature record, for the reasons laid out in our #PNAS article from last month: https://www.pnas.org/doi/10.1073/pnas.2600021123
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2027--which is likely to coincide with the mature phase of a major El Niño event--is likely to set a new global temperature record, for the reasons laid out in our #PNAS article from last month: https://www.pnas.org/doi/10.1073/pnas.2600021123
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#idw #Windräder verursachen keine nachweisbaren Gesundheitsschäden
Umfangreiche, über 12 Jahre währende Längsschnittuntersuchung rund um Wohnnähe zu Windrädern und Gesundheit in renommierter Fachzeitschrift #PNAS zeigt: Wohnnähe zu Windrädern ist in den untersuchten US-Daten nicht mit Schlafstörungen, Depressionen, Angststörungen oder Kopfschmerzen verbunden. https://idw-online.de/de/news872681
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#idw #Windräder verursachen keine nachweisbaren Gesundheitsschäden
Umfangreiche, über 12 Jahre währende Längsschnittuntersuchung rund um Wohnnähe zu Windrädern und Gesundheit in renommierter Fachzeitschrift #PNAS zeigt: Wohnnähe zu Windrädern ist in den untersuchten US-Daten nicht mit Schlafstörungen, Depressionen, Angststörungen oder Kopfschmerzen verbunden. https://idw-online.de/de/news872681
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Chinese scientists create record-smashing brain implant electrode array thinner than hair https://www.byteseu.com/2119538/ #AssociateProfessorXuXiaomin #BrainComputerInterfaces #China #ChinaScienceDaily #ConductiveHydrogelWithInterfacialPercolation #ECoGElectrodeArray #PNAS #ProfessorLiXiaojian #ProfessorTakaoSomeya #rabbits #Science #ShenzhenInternationalGraduateSchool #TheUniversityOfTokyo #TsinghuaUniversity #UniversityOfTokyo
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Check out our latest publication on #SarsCoV2 Polymerase / ExoNuclease cooperativity and how it complexify treatment of coronavirus infections with nucleoside analogue antivirals . #pnas
https://www.pnas.org/doi/10.1073/pnas.2605725123
@afmblab.bsky.social
@PNASNews
@bioinformatics
@biophysics
@strucbio -
Urban Light Pollution Might Be Worsening Allergies
If you live in a big, brightly lit city and you feel like allergy season just never ends,…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Environment #Allergies #asthma #Biorhythms #FlowersandPlants #globalwarming #lighting #PNAS(Journal) #pollen #Research #respiratorydiseases #Science #TreesandShrubs #urbanareas
https://www.newsbeep.com/us/684187/ -
Urban Light Pollution Might Be Worsening Allergies
If you live in a big, brightly lit city and you feel like allergy season just never ends,…
#NewsBeep #News #US #USA #UnitedStates #UnitedStatesOfAmerica #Environment #Allergies #asthma #Biorhythms #FlowersandPlants #globalwarming #lighting #PNAS(Journal) #pollen #Research #respiratorydiseases #Science #TreesandShrubs #urbanareas
https://www.newsbeep.com/us/684187/ -
#Extremeheat reduces and reshapes #urbanmobility | #PNAS Nexus | #OxfordAcademic
https://academic.oup.com/pnasnexus/article/5/4/pgag078/8651395?login=falseExtreme heat is a problem in Southern European countries & cities, aggravated by rising temperatures & aging populations. Research on mobility during extreme heat remains limited to small samples & geographic contexts, leaving gaps in our systematic understanding of how populations adjust their day-to-day mobility patterns & how these adaptations vary across social groups.
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#Extremeheat reduces and reshapes #urbanmobility | #PNAS Nexus | #OxfordAcademic
https://academic.oup.com/pnasnexus/article/5/4/pgag078/8651395?login=falseExtreme heat is a problem in Southern European countries & cities, aggravated by rising temperatures & aging populations. Research on mobility during extreme heat remains limited to small samples & geographic contexts, leaving gaps in our systematic understanding of how populations adjust their day-to-day mobility patterns & how these adaptations vary across social groups.
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#Extremeheat reduces and reshapes #urbanmobility | #PNAS Nexus | #OxfordAcademic
https://academic.oup.com/pnasnexus/article/5/4/pgag078/8651395?login=falseExtreme heat is a problem in Southern European countries & cities, aggravated by rising temperatures & aging populations. Research on mobility during extreme heat remains limited to small samples & geographic contexts, leaving gaps in our systematic understanding of how populations adjust their day-to-day mobility patterns & how these adaptations vary across social groups.
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#Extremeheat reduces and reshapes #urbanmobility | #PNAS Nexus | #OxfordAcademic
https://academic.oup.com/pnasnexus/article/5/4/pgag078/8651395?login=falseExtreme heat is a problem in Southern European countries & cities, aggravated by rising temperatures & aging populations. Research on mobility during extreme heat remains limited to small samples & geographic contexts, leaving gaps in our systematic understanding of how populations adjust their day-to-day mobility patterns & how these adaptations vary across social groups.
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#Extremeheat reduces and reshapes #urbanmobility | #PNAS Nexus | #OxfordAcademic
https://academic.oup.com/pnasnexus/article/5/4/pgag078/8651395?login=falseExtreme heat is a problem in Southern European countries & cities, aggravated by rising temperatures & aging populations. Research on mobility during extreme heat remains limited to small samples & geographic contexts, leaving gaps in our systematic understanding of how populations adjust their day-to-day mobility patterns & how these adaptations vary across social groups.
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https://www.europesays.com/ie/506561/ 100,000-Year-Old Bones in Ethiopia May Point to the Earliest Human Cremation #AfarRift #AncientHumans #Archaeology #cremation #EarlyHumans #Éire #Ethiopia #FossilDiscovery #HomoSapiens #HumanEvolution #IE #Ireland #MiddleAwash #MiddleStoneAge #MortuaryRituals #paleoanthropology #PNAS #Science #StoneTools #UniversityOfOulu
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https://www.europesays.com/africa/255616/ 100,000-Year-Old Bones in Ethiopia May Point to the Earliest Human Cremation #AfarRift #AncientHumans #Archaeology #crémation #EarlyHumans #Ethiopia #FossilDiscovery #HomoSapiens #HumanEvolution #MiddleAwash #MiddleStoneAge #MortuaryRituals #paleoanthropology #PNAS #StoneTools #UniversityOfOulu
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Évolution de "tests" nucléaires de 1945
https://www.pnas.org/doi/abs/10.1073/pnas.2604165123?ref=404media.co
The #Trinity nuclear test of July 16, 1945, generated extreme transient conditions that produced trinitite, a silicate glass containing rare metallic phases.
À lire sur #PNAS -
İlk atom bombasının küllerinden doğan gizem, PNAS’da yayımlandı. 25k ton TNT patlaması sonrası atomlar yeni düzenler kuruyor. ✨🔬
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An opinion piece in #PNAS (Proceedings of the National Academy of Sciences) suggests that to help the overwhelmed #PeerReview system in #science, a transparent universal credit system should be established to incentivize peer review: https://www.pnas.org/doi/10.1073/pnas.2506681123.
Nah. Peer reviewers need to be paid #income for their work! And one associate professor says, in a comment on Bluesky, that for-profit #publishers should pay peer reviewers.
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An opinion piece in #PNAS (Proceedings of the National Academy of Sciences) suggests that to help the overwhelmed #PeerReview system in #science, a transparent universal credit system should be established to incentivize peer review: https://www.pnas.org/doi/10.1073/pnas.2506681123.
Nah. Peer reviewers need to be paid #income for their work! And one associate professor says, in a comment on Bluesky, that for-profit #publishers should pay peer reviewers.
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#Global #crop #introduction drives #host jumps, turning native #pathogens into emerging #diseases
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#Global #crop #introduction drives #host jumps, turning native #pathogens into emerging #diseases
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https://www.europesays.com/it/472874/ Tumore al pancreas: ritirato lo studio che aveva scoperto una nuova cura per il cancro – La Gazzetta dello Sport #annunciato #autore #AutorePrincipale #AutorePrincipaleStudio #barbacid #Cancro #causa #CausaConflitto #cellule #conflitto #ConflittoInteresse #dottori #farmaci #Health #interesse #interessi #IT #Italia #Italy #oncotargets #pancreas #pnas #principale #ricerca #risultati #rivista #Salute #scoperto #studio #tumore #TumorePancreas #vega #VegaOncotargets
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La rivista #Pnas ha ritirato uno studio che annunciava la regressione completa del tumore al pancreas in 45 topi, risultato che aveva acceso forti aspettative e raccolto 3,6 milioni di euro in donazioni.
Indovina indovina? Conflitto di interessi: il ricercatore è lo stesso cofondatore della società che produce le molecole testate.
Top.
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La rivista #Pnas ha ritirato uno studio che annunciava la regressione completa del tumore al pancreas in 45 topi, risultato che aveva acceso forti aspettative e raccolto 3,6 milioni di euro in donazioni.
Indovina indovina? Conflitto di interessi: il ricercatore è lo stesso cofondatore della società che produce le molecole testate.
Top.
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🐱👶 Researchers from #Cornell and #Washington University used #3D imaging to show how artificial selection pushes #cats and #dogs toward similar "baby-faced" skull shapes.
The study indicates that flat-faced breeds share more traits with each other than with their own wild ancestors.
👉 https://www.popularmechanics.com/science/a71137856/similarities-cats-dogs-evolution-babies/
#biology #evolution #science #genetics #research #pnas #pets #nature
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🐱👶 Researchers from #Cornell and #Washington University used #3D imaging to show how artificial selection pushes #cats and #dogs toward similar "baby-faced" skull shapes.
The study indicates that flat-faced breeds share more traits with each other than with their own wild ancestors.
👉 https://www.popularmechanics.com/science/a71137856/similarities-cats-dogs-evolution-babies/
#biology #evolution #science #genetics #research #pnas #pets #nature
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https://www.europesays.com/es/521903/ La revista ‘PNAS’ retira el estudio de Barbacid de cáncer de páncreas por conflictos de interés no declarados #barbacid #BreakingNews #BreakingNews #Conflictos #declarados #Estudio #FeaturedNews #FeaturedNews #Headlines #interes #Internacional #International #InternationalNews #InternationalNews #LatestNews #LatestNews #News #Noticias #NoticiasDestacadas #NoticiasDestacadas #pnas #retira #revista #Titulares #ÚltimasNoticias #ÚltimasNoticias #World #WorldNews #WorldNews
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Considering that there is nothing new in this paper I was thinking that it could be a great #PNAS paper.
It is a PNAS paper.
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#peoplesworld:
"
Safety meltdown: Trump’s weakening of nuclear reactor regulations sparks opposition
"
".. attorneys general from several states .. announced they’ve formed a coalition to oppose the Trump administration’s new rules slashing security and environmental requirements for experimental nuclear reactors."".. creation of “much more nuclear waste.”"
10.3.2026
#Atomkraft #Atommüll #DOE #Kernenergie #NEPA #NuclearSafety #NuclearWaste #PNAS #Reactor #UCS #USA
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#peoplesworld:
"
Safety meltdown: Trump’s weakening of nuclear reactor regulations sparks opposition
"
".. attorneys general from several states .. announced they’ve formed a coalition to oppose the Trump administration’s new rules slashing security and environmental requirements for experimental nuclear reactors."".. creation of “much more nuclear waste.”"
10.3.2026
#Atomkraft #Atommüll #DOE #Kernenergie #NEPA #NuclearSafety #NuclearWaste #PNAS #Reactor #UCS #USA
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Edit: so the direct submission is just normal, and the journal also has a "contributed submissions" but it seems that's also peer-reviewed:
https://www.pnas.org/author-center/member-contributed-submissions
Maybe my info was just outdated 🤔Edit 2: actually, it looks like the authors in that contributed submission case can choose their reviewers 🤔🤔
"Contributed submissions must include the names of at least two experts in relevant subject areas (particularly for multidisciplinary studies) who have agreed to review the manuscript."
-- original post --
Question about direct submissions in the journal #PNAS to anyone who might know:Some of the articles there are noted as "direct submissions" - does this mean that these manuscripts do not go through peer-review before being published?
Isn't that strange?
Shouldn't these papers be considered similar to preprints?
Why would anyone want to do this instead of going through the peer-review process or posting as a preprint?Example: Volitional learning promotes theta phase coding in the human hippocampus
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Edit: so the direct submission is just normal, and the journal also has a "contributed submissions" but it seems that's also peer-reviewed:
https://www.pnas.org/author-center/member-contributed-submissions
Maybe my info was just outdated 🤔Edit 2: actually, it looks like the authors in that contributed submission case can choose their reviewers 🤔🤔
"Contributed submissions must include the names of at least two experts in relevant subject areas (particularly for multidisciplinary studies) who have agreed to review the manuscript."
-- original post --
Question about direct submissions in the journal #PNAS to anyone who might know:Some of the articles there are noted as "direct submissions" - does this mean that these manuscripts do not go through peer-review before being published?
Isn't that strange?
Shouldn't these papers be considered similar to preprints?
Why would anyone want to do this instead of going through the peer-review process or posting as a preprint?Example: Volitional learning promotes theta phase coding in the human hippocampus
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2 Mart'ta bilim dergisi #PNAS'ta yayımlanan makalenin kıdemli yazarı Figueroa, "#Böcek ve örümceğimsi türlerinin neredeyse yüzde 90'ının, tam olarak yüzde 88,5'inin, herhangi bir koruma statüsü yok" diyor #Sondakika #Örümcek #DoğalYaşam #Hayvan
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✍️ 𝗦𝗲𝗴𝗻𝗶 𝗶𝗻𝗰𝗶𝘀𝗶 𝟰𝟬｡𝟬𝟬𝟬 𝗮𝗻𝗻𝗶 𝗳𝗮 𝗽𝗼𝘁𝗿𝗲𝗯𝗯𝗲𝗿𝗼 𝗲𝘀𝘀𝗲𝗿𝗲 𝗹’𝗮𝗻𝘁𝗲𝗻𝗮𝘁𝗼 𝗱𝗲𝗹𝗹𝗮 𝘀𝗰𝗿𝗶𝘁𝘁𝘂𝗿𝗮
✅ Uno studio condotto su 3.000 incisioni paleolitiche rivela sorprendenti sequenze di segni, la cui complessità è paragonabile alla proto-cuneiforme mesopotamica. Lo studio è pubblicato sulla rivista scientifica PNAS
#Archeologia #Preistoria #Paleolitico #OriginiDellaScrittura #studi #PNAS
➡️ L’articolo su Storie & Archeostorie: https://wp.me/p7tSpZ-cno
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✍️ 𝗦𝗲𝗴𝗻𝗶 𝗶𝗻𝗰𝗶𝘀𝗶 𝟰𝟬｡𝟬𝟬𝟬 𝗮𝗻𝗻𝗶 𝗳𝗮 𝗽𝗼𝘁𝗿𝗲𝗯𝗯𝗲𝗿𝗼 𝗲𝘀𝘀𝗲𝗿𝗲 𝗹’𝗮𝗻𝘁𝗲𝗻𝗮𝘁𝗼 𝗱𝗲𝗹𝗹𝗮 𝘀𝗰𝗿𝗶𝘁𝘁𝘂𝗿𝗮
✅ Uno studio condotto su 3.000 incisioni paleolitiche rivela sorprendenti sequenze di segni, la cui complessità è paragonabile alla proto-cuneiforme mesopotamica. Lo studio è pubblicato sulla rivista scientifica PNAS
#Archeologia #Preistoria #Paleolitico #OriginiDellaScrittura #studi #PNAS
➡️ L’articolo su Storie & Archeostorie: https://wp.me/p7tSpZ-cno
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Unique among the senses, the ear expends energy to amplify the stimuli that it detects. New research shows that a segment of mammalian cochlea ex vivo displays features of this active process—amplification, frequency tuning, compressive nonlinearity & generation of distortion products—operating locally & near criticality at a Hopf bifurcation—a unified biophysical principle that underlies auditory processing across species. https://www.pnas.org/doi/10.1073/pnas.2503389122
#PNAS #Hearing #Auditory #Complexsystems -
Unique among the senses, the ear expends energy to amplify the stimuli that it detects. New research shows that a segment of mammalian cochlea ex vivo displays features of this active process—amplification, frequency tuning, compressive nonlinearity & generation of distortion products—operating locally & near criticality at a Hopf bifurcation—a unified biophysical principle that underlies auditory processing across species. https://www.pnas.org/doi/10.1073/pnas.2503389122
#PNAS #Hearing #Auditory #Complexsystems -
How can tiny amounts of gas produced by cosmic rays inside grains of sand give clues about Australia’s ancient landscapes?
Researchers at our Uni, #Curtin & #Köln demonstrated a new method to reconstruct how ancient landscapes eroded and sediments moved across continents millions of years ago. Find out about the cosmic clock in tiny crystals: https://www.uni-goettingen.de/en/3240.html?id=8063
Research in #PNAS: https://doi.org/10.1073/pnas.2516058122
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How can tiny amounts of gas produced by cosmic rays inside grains of sand give clues about Australia’s ancient landscapes?
Researchers at our Uni, #Curtin & #Köln demonstrated a new method to reconstruct how ancient landscapes eroded and sediments moved across continents millions of years ago. Find out about the cosmic clock in tiny crystals: https://www.uni-goettingen.de/en/3240.html?id=8063
Research in #PNAS: https://doi.org/10.1073/pnas.2516058122
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How can tiny amounts of gas produced by cosmic rays inside grains of sand give clues about Australia’s ancient landscapes?
Researchers at our Uni, #Curtin & #Köln demonstrated a new method to reconstruct how ancient landscapes eroded and sediments moved across continents millions of years ago. Find out about the cosmic clock in tiny crystals: https://www.uni-goettingen.de/en/3240.html?id=8063
Research in #PNAS: https://doi.org/10.1073/pnas.2516058122
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How can tiny amounts of gas produced by cosmic rays inside grains of sand give clues about Australia’s ancient landscapes?
Researchers at our Uni, #Curtin & #Köln demonstrated a new method to reconstruct how ancient landscapes eroded and sediments moved across continents millions of years ago. Find out about the cosmic clock in tiny crystals: https://www.uni-goettingen.de/en/3240.html?id=8063
Research in #PNAS: https://doi.org/10.1073/pnas.2516058122
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How can tiny amounts of gas produced by cosmic rays inside grains of sand give clues about Australia’s ancient landscapes?
Researchers at our Uni, #Curtin & #Köln demonstrated a new method to reconstruct how ancient landscapes eroded and sediments moved across continents millions of years ago. Find out about the cosmic clock in tiny crystals: https://www.uni-goettingen.de/en/3240.html?id=8063
Research in #PNAS: https://doi.org/10.1073/pnas.2516058122
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Aktuell in PNAS erschienen: Diese Studie erklärt, wie das Gehirn den Zeitpunkt zukünftiger Ereignisse voraussagt. Link zur Studie: https://doi.org/10.1073/pnas.2518982123
#Neurowissenschaft #Hirnforschung #Aufmerksamkeit #Prognose #Wahrscheinlichkeit #Zeit #PNAS
https://nachrichten.idw-online.de/2026/01/13/skalierungsfreie-schaetzung-der-wahrscheinlichkeit-so-trifft-das-gehirn-vorhersagen -
Anakonda w żyrandolu. Naukowcy zbadali, w którym momencie (i dlaczego) zaczynamy milczeć w sieci
Wolność słowa w internecie to nie tylko kwestia tego, na co pozwala algorytm. To przede wszystkim kwestia tego, na co pozwalamy sobie sami.
Nowe badanie opublikowane w „Proceedings of the National Academy of Sciences” pokazuje mechanizm autocenzury. Wniosek? Największym wrogiem autorytaryzmu (i korporacyjnej cenzury) jest nasza odwaga.
Większość dyskusji o cenzurze w sieci skupia się na „złych moderatorach” lub „banowaniu kont”. Tymczasem naukowcy z Arizona State University postanowili zbadać coś znacznie ciekawszego: moment, w którym użytkownik sam postanawia zamilknąć, zanim ktokolwiek go ukarze. Stworzyli model symulacyjny, który wyjaśnia dynamikę strachu i buntu.
Anakonda w żyrandolu
Badacze wyróżnili trzy modele kontroli słowa, które obserwujemy na świecie (i w social mediach):
- Model rosyjski (legalistyczny): władza tworzy tysiące szczegółowych przepisów. Jeśli zrobisz X, dostaniesz karę Y. Jest surowo, ale wiesz, na czym stoisz.
- Model amerykański (korporacyjny): państwo umywa ręce, a o tym, co wolno, decydują prywatne firmy (Twitter, Meta) w oparciu o swoje regulaminy i zyski.
- Model chiński (nieoznaczony): to najciekawszy i najbardziej przerażający mechanizm, nazwany przez badaczy „Anakondą w żyrandolu”.
Na czym polega „Anakonda”? Władza (lub platforma) nie mówi, gdzie dokładnie przebiega czerwona linia. Mówi tylko: „zachowuj się, albo spadnie na ciebie wąż”. Brak jasnych reguł sprawia, że ludzie – ze strachu przed nieznanym – cenzurują się sami znacznie bardziej rygorystycznie, niż wymagałby tego jakikolwiek spisany regulamin. To mechanizm psychologiczny: gdy nie wiesz, co jest zakazane, zakładasz, że zakazane jest wszystko.
Pomóż nam rozwijać iMagazine – ruszyło badanie czytelnictwa 2026
Bądź odważny (to spowalnia system)
Symulacje wykazały, że autorytaryzm (czy to państwowy, czy narzucany przez algorytmy) „pełznie”. Zaczyna się łagodnie, jak w chińskiej Kampanii Stu Kwiatów, zachęcając do dyskusji, by potem nagle uderzyć.
Jednak model matematyczny ujawnił też antidotum. Jest nim odwaga. Jeśli społeczeństwo (lub społeczność serwisu) jest wystarczająco „bezczelne” i mimo niejasnych gróźb nadal wyraża swoje zdanie, system represji się zacina. Władza nie może przejść do etapu „drakońskiego”, bo musiałaby ukarać wszystkich naraz, co jest zbyt kosztowne.
– Bądź odważny – radzi Joshua Daymude, współautor badania. – To jedyna rzecz, która spowalnia pełzający autorytaryzm. Nawet jeśli nie wygrasz od razu, kupujesz czas.
Mandat za prędkość a autocenzura
Co ciekawe, autocenzura nie zawsze jest zła. Badacze porównują to do ograniczeń prędkości. W systemie „jednakowa kara dla wszystkich”, najbardziej milkną ci umiarkowani – bo ryzyko nie jest dla nich warte świeczki. Ekstremiści i tak krzyczą.
W systemie „kara proporcjonalna do winy”, sytuacja się odwraca: ekstremiści milkną (bo kara za duże wykroczenie jest ogromna), a umiarkowani czują się swobodnie, naciągając zasady tylko „trochę”.
To badanie to ważna lekcja dla nas wszystkich w 2026 roku. Niejasne „Standardy Społeczności” i bany za algorytmiczne domysły działają jak ta Anakonda – sprawiają, że boimy się odezwać. A jedynym sposobem, by wąż nie spadł, jest… hałasowanie.
#ArsTechnica #badaniaNaukowe #cenzura #PNAS #Psychologia #socialMedia #wolnośćSłowaApple Pay dla dowodu osobistego. Dlaczego Bruksela udaje, że technologia nie istnieje?
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Anakonda w żyrandolu. Naukowcy zbadali, w którym momencie (i dlaczego) zaczynamy milczeć w sieci
Wolność słowa w internecie to nie tylko kwestia tego, na co pozwala algorytm. To przede wszystkim kwestia tego, na co pozwalamy sobie sami.
Nowe badanie opublikowane w „Proceedings of the National Academy of Sciences” pokazuje mechanizm autocenzury. Wniosek? Największym wrogiem autorytaryzmu (i korporacyjnej cenzury) jest nasza odwaga.
Większość dyskusji o cenzurze w sieci skupia się na „złych moderatorach” lub „banowaniu kont”. Tymczasem naukowcy z Arizona State University postanowili zbadać coś znacznie ciekawszego: moment, w którym użytkownik sam postanawia zamilknąć, zanim ktokolwiek go ukarze. Stworzyli model symulacyjny, który wyjaśnia dynamikę strachu i buntu.
Anakonda w żyrandolu
Badacze wyróżnili trzy modele kontroli słowa, które obserwujemy na świecie (i w social mediach):
- Model rosyjski (legalistyczny): władza tworzy tysiące szczegółowych przepisów. Jeśli zrobisz X, dostaniesz karę Y. Jest surowo, ale wiesz, na czym stoisz.
- Model amerykański (korporacyjny): państwo umywa ręce, a o tym, co wolno, decydują prywatne firmy (Twitter, Meta) w oparciu o swoje regulaminy i zyski.
- Model chiński (nieoznaczony): to najciekawszy i najbardziej przerażający mechanizm, nazwany przez badaczy „Anakondą w żyrandolu”.
Na czym polega „Anakonda”? Władza (lub platforma) nie mówi, gdzie dokładnie przebiega czerwona linia. Mówi tylko: „zachowuj się, albo spadnie na ciebie wąż”. Brak jasnych reguł sprawia, że ludzie – ze strachu przed nieznanym – cenzurują się sami znacznie bardziej rygorystycznie, niż wymagałby tego jakikolwiek spisany regulamin. To mechanizm psychologiczny: gdy nie wiesz, co jest zakazane, zakładasz, że zakazane jest wszystko.
Pomóż nam rozwijać iMagazine – ruszyło badanie czytelnictwa 2026
Bądź odważny (to spowalnia system)
Symulacje wykazały, że autorytaryzm (czy to państwowy, czy narzucany przez algorytmy) „pełznie”. Zaczyna się łagodnie, jak w chińskiej Kampanii Stu Kwiatów, zachęcając do dyskusji, by potem nagle uderzyć.
Jednak model matematyczny ujawnił też antidotum. Jest nim odwaga. Jeśli społeczeństwo (lub społeczność serwisu) jest wystarczająco „bezczelne” i mimo niejasnych gróźb nadal wyraża swoje zdanie, system represji się zacina. Władza nie może przejść do etapu „drakońskiego”, bo musiałaby ukarać wszystkich naraz, co jest zbyt kosztowne.
– Bądź odważny – radzi Joshua Daymude, współautor badania. – To jedyna rzecz, która spowalnia pełzający autorytaryzm. Nawet jeśli nie wygrasz od razu, kupujesz czas.
Mandat za prędkość a autocenzura
Co ciekawe, autocenzura nie zawsze jest zła. Badacze porównują to do ograniczeń prędkości. W systemie „jednakowa kara dla wszystkich”, najbardziej milkną ci umiarkowani – bo ryzyko nie jest dla nich warte świeczki. Ekstremiści i tak krzyczą.
W systemie „kara proporcjonalna do winy”, sytuacja się odwraca: ekstremiści milkną (bo kara za duże wykroczenie jest ogromna), a umiarkowani czują się swobodnie, naciągając zasady tylko „trochę”.
To badanie to ważna lekcja dla nas wszystkich w 2026 roku. Niejasne „Standardy Społeczności” i bany za algorytmiczne domysły działają jak ta Anakonda – sprawiają, że boimy się odezwać. A jedynym sposobem, by wąż nie spadł, jest… hałasowanie.
#ArsTechnica #badaniaNaukowe #cenzura #PNAS #Psychologia #socialMedia #wolnośćSłowaApple Pay dla dowodu osobistego. Dlaczego Bruksela udaje, że technologia nie istnieje?