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Brain Evolution News

@brainevolutionnews.bsky.social
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Brain Evolution in the News posted here for you! For events & opportunities in brain evolution research follow @EurNetBrainEvoR.bsky.social brainevolutionnews.blogspot.com

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Brain Evolution News @brainevolutionnews.bsky.social · 28/09/2026
Study Supports and Expands the Primate Brain Lag Hypothesis neurosciencenews.com/brain-lag-ev...
neurosciencenews.com
Study Supports and Expands the Primate Brain Lag Hypothesis - Neuroscience News
A new study uses molecular genetics to validate the brain lag hypothesis and evolutionary neural overshoot.
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Brain Evolution News @brainevolutionnews.bsky.social · 28/09/2026
Fossil study finds vision—not the 'thinking' frontal lobe—drove varied brain development in primates phys.org/news/2026-08...
phys.org
Fossil study finds vision—not the 'thinking' frontal lobe—drove varied brain development in primates
A new study led by a Duke University scientist overturns a long-held idea about how primates, including humans, came to have such large and sophisticated brains. The research finds that the dramatic e...
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Brain Evolution News @brainevolutionnews.bsky.social · 27/09/2026
Brain organoids uncover how primates develop different brain shapes phys.org/news/2026-09...
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
Its basal part is derived from the evolutionarily expanding early RL, like the other CN. The higher-order part is uniquely derived from the late RL and doesn’t recruit inhibitory IO-projection neurons, forming an entirely different cerebellar circuit.
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
In the 1-to-2-to-3 nucleus evolution scheme, we often think of the medial nucleus as the oldest, most basal nucleus, but it also performs higher-order functions in mammals. Here, we resolve this by finding that the medial nucleus has a dual developmental and likely evolutionary origin!
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
Nucleus-invariant inhibitory neurons integrate into these territories by P4.
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
The cerebellar nuclei expanded from 1 to 2 to 3 nuclei across vertebrates. We find that it is the early RL that changes to produce these new nuclei. Making a new nucleus is a two-step process: Make a new progenitor, then sort its offspring into spatially separate regions.
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
In mice, excitatory CN neurons establish all adult nuclear territories by E15.5.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
So, what distinguishes one reptilian pallium from another may be the lineage-specific modulation of a conserved transcriptional program. Building a neocortex may therefore have had more to do with re-using an ancient blueprint.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Jiménez S., Moreno-Cerdá A., Moreno-Bravo J.-A., Moreno N. y García-Moreno F. (2026). Divergent structural trajectories for pallial regionalization within reptiles reveal conserved evolutionary blueprints. Cerebral Cortex 36(9): bhag131 🫶🏻 👉🏽 t.co/RtU0ninn3H
t.co
https://doi.org/10.1093/cercor/bhag131
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Result 5. In both species, we found apical and basal progenitors, but no detectable Eomes+ intermediate progenitors 🕵🏼‍♀️ , the cell type associated with cortical expansion in mammals 🐁🧠.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Result 4. Beneath all this divergence, the medial and lateral cortices retain the same organization. The most parsimonious interpretation is therefore that these regions were already present in the last common ancestor of amniotes.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Result 3. Geckos 🦎 have a spherical nucleus 🌀 that turtles simply do not possess. It may correspond to the pallial amygdala described in chelonians: the same ancestral territory, but organized differently.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Result 1. The dorsal cortex is not uniform. Satb1 and Satb2 subdivide it into two distinct regions in both species, consistent with what has been described in other sauropsids…🐊
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
For the first time in these species, we used in situ Hybridization Chain Reaction (HCR) (@molecularinstruments) to map gene expression 🧬, together with 3D light-sheet microscopy 😯
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
Why reptiles? Not because they are “primitive”, they have been evolving for exactly as long as we have. But they never developed a six-layered cortex. So, the features they still share with us are more likely to have been inherited than independently reinvented.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
The pallium is the region of the forebrain that ultimately gave rise to our neocortex. All amniotes have one: mammals 🐁, birds 🐥, and reptiles 🦎. But how it is subdivided, and which cell types build it, is still a matter of debate.
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
FANTASTIC WORK led from beginning to end by social-netowrkless Dr. Sara Jiménez! And with our lovely collaborators in Madrid and Alicante: Ana Moreno-Cerdá, Juan Antonio Moreno-Bravo and Nerea Moreno. 🫶🏻 👉🏽 academic.oup.com/cercor/artic...
academic.oup.com
Divergent structural trajectories for pallial regionalization within reptiles reveal conserved evolutionary blueprints
Abstract. The pallium is the evolutionary precursor of the neocortex and a central brain region underlying learning or social behavior, yet its histogeneti
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Fernando Garcia-Moreno @phylobrain.bsky.social · 18/09/2026
The cerebral cortex that is reading this sentence (yours, to be explicit) did not come out of nowhere. It has evolved over hundreds of millions of years... To study this evolutionary process, we decided to focus on non-avian reptiles for our new paper in Cerebral Cortex 🐢🦎🧠 🧵
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Nick Jourjine @nickjourjine.bsky.social · 20/09/2026
New preprint! TLDR: We mapped the genetic architecture of neonatal vocalization in deer mice, and found candidate genes expressed in the cerebellum that could be contributing to the evolution of temporal structure in infant cries #Bioacoustics #neuroskyence www.biorxiv.org/content/10.6...
biorxiv.org
The Genetic Architecture of Neonatal Deer Mouse Cries Implicates the Cerebellum in the Temporal Control of an Infant Social Behavior
Vocal communication is a conserved vertebrate social behavior that begins at birth with the cries of infants. These neonatal vocal signals vary across contexts to elicit parental care that matches inf...
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Cedric Boeckx @cedricboeckx.bsky.social · 20/09/2026
Amazing work led by @nickjourjine.bsky.social showing how the species-specific temporal structure of neonatal vocalizations in deer mice can be traced back to cerebellar anatomy & maybe even to a genomic locus containing plausible gene candidates [e.g ASTN2, well studied by @mbhatten.bsky.social ]🧪
biorxiv.org
The Genetic Architecture of Neonatal Deer Mouse Cries Implicates the Cerebellum in the Temporal Control of an Infant Social Behavior
Vocal communication is a conserved vertebrate social behavior that begins at birth with the cries of infants. These neonatal vocal signals vary across contexts to elicit parental care that matches inf...
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Justus Kebschull @justuskebschull.bsky.social · 21/09/2026
NEW PREPRINT! An evo-devo look at how new cerebellar nuclei are made. Spoiler: it’s all driven by region-specific excitatory progenitors in the early rhombic lip; inhibitory neurons fill in later. If you care about brain evolution or cerebellar development, check it out: tinyurl.com/CNdevelopment
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Cedric Boeckx @cedricboeckx.bsky.social · 14/09/2026
Special thanks to @ellylewerissa.bsky.social for leading this effort and to @naelnadifkasri-lab.bsky.social for supporting this more ambitious attempt. It’s been great to discuss this material with them on many occasions
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Cedric Boeckx @cedricboeckx.bsky.social · 14/09/2026
Our preprint on the impact of CHD2 dosage on human brain maturation & evolution received very thoughtful comments from readers (🙏). This motivated us to do a couple more experiments that bolster our original claims. The substantially revised version is now on @biorxivpreprint.bsky.social 🧪
biorxiv.org
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Vikram Chandra @vchandra.bsky.social · 09/09/2026
I am excited to announce that I will start the Brain Origins Lab at the Crick in March 2027! Using acoels as a model system, the lab will study how animal brains evolve, and how innovations in brain organisation enable new computational abilities and the evolution of complex behaviour.
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The Transmitter @thetransmitter.bsky.social · 04/09/2026
A look at the scientists studying brains and behavior in species found almost nowhere else. Check out our collection of articles on current neuroethology research in Latin America. By Natalia Mesa www.thetransmitter.org/neuroetholog...
thetransmitter.org
Latin America’s biodiversity fuels social behavior, cognition insights
Ovenbirds, electric fish, tree frogs and other regional fauna help neuroscientists ask novel research questions in the field.
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ENBER mailing list @eurnetbrainevor.bsky.social · 11/09/2026
European Network for Brain Evolution Research sites.google.com/site/eurobra...
sites.google.com
European Network for Brain Evolution Research
The European Network for Brain Evolution Research was founded in 2010. It brings together researchers from multiple disciplines around the globe who share an interest in evolutionary neuroscience. The...
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Brain Evolution News @brainevolutionnews.bsky.social · 10/09/2026
Scaled up to size, a raccoon brain would contain roughly the same number of neurons as a human brain. fortune.com/2026/01/16/a...
fortune.com
For 15 years, a neuroscientist has studied raccoon intelligence in Central Virginia. Then a drunk one passed out in a nearby liquor store | Fortune
Scaled up to size, a raccoon brain would contain roughly the same number of neurons as a human brain.
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Edwin de Jager @edwindejager.bsky.social · 17/06/2026
Hot of the press! 🧠🦴 onlinelibrary.wiley.com/doi/10.1111/... Digital atlas of cortical sulcal imprints on #Pan endocasts now out in open access in the @journalofanatomy.bsky.social!" @palevoprim.bsky.social, @cam-archaeology.bsky.social, @cnrsecologie.bsky.social, @fondationfyssen.bsky.social
onlinelibrary.wiley.com
Atlas of cortical sulcal imprints on Pan endocasts
This comprehensive atlas documents the frequency, position, and variability of cortical sulcal imprints across 21 extant Pan endocasts, providing the first quantitative baseline for comparative paleo...
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Amélie Beaudet @ameliebeaudet.bsky.social · 03/09/2026
🧠 This week #CoEvol team member @edwindejager.bsky.social is presenting his work on hominin brain evolution at the Evolution of Brain Connectomics Workshop in Lyon! @palevoprim.bsky.social @cnrsecologie.bsky.social @fondationfyssen.bsky.social
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Brain Evolution News @brainevolutionnews.bsky.social · 08/09/2026
‘This is dangerous’: slime moulds and the bitter debate over the nature of intelligence www.theguardian.com/news/ng-inte...
theguardian.com
‘This is dangerous’: slime moulds and the bitter debate over the nature of intelligence
The long read: Scientists are battling over whether supposedly simple organisms should be considered ‘intelligent’. The outcome could reshape our understanding of the natural world – and our own place...
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Brain Evolution News @brainevolutionnews.bsky.social · 14/08/2026
Inside the Not-So-Dumb Head of the Dodo Bird nautil.us/inside-the-n...
nautil.us
Inside the Not-So-Dumb Head of the Dodo Bird
Inside the Not-So-Dumb Head of the Dodo Bird: Cranial scans reveal a brain with clever sensory adaptations
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Wilson Ornithological Society @wilsonornithsoc.bsky.social · 13/08/2026
Fun bird news: Scans of the internal contours of dodos's skulls hint at the sensory abilities of these famous extinct birds. (Via Nautilus.) nautil.us/inside-the-n...
nautil.us
Inside the Not-So-Dumb Head of the Dodo Bird
Inside the Not-So-Dumb Head of the Dodo Bird: Cranial scans reveal a brain with clever sensory adaptations
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Andrew Iwaniuk @evoneuro.bsky.social · 13/08/2026
Great interview on CBC with @evolsara.bsky.social on Dodo brains today #yql #Canada 🦤 🧠 🧪 @weisbeckerbblab.bsky.social @aub-birdy.bsky.social www.cbc.ca/player/play/...
cbc.ca
Dodo birds were actually smart?
In the three-and-a-half centuries since the flightless Dodo bird was wiped out, the word “dodo” has become synonymous with dim-witted and dumb. But now, new research studying their skulls is showing t...
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Sue Stone @knittingknots.bsky.social · 27/08/2025
Primates with longer thumbs tend to have bigger brains, research finds | Evolution | The Guardian www.theguardian.com/science/2025...
theguardian.com
Primates with longer thumbs tend to have bigger brains, research finds
Results suggest brain co-evolved with manual dexterity, say scientists, with humans by no means the outlier
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Cedric Boeckx @cedricboeckx.bsky.social · 09/07/2026
the other looking atastrocyte-derived signals (lab of @aleksandrapekowska.bsky.social) www.biorxiv.org/content/10.6...
biorxiv.org
Primate Astrocyte Evolution Controls the Tempo of Neuronal Development
Prolonged neuronal maturation, also referred to as neoteny, constitutes a hallmark of human brain evolution. Yet, the mechanisms controlling neotenic brain development remain poorly understood, and ha...
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Jennifer Botha @jenniferbotha.bsky.social · 15/07/2026
We examined how mammal ancestor brain size changed through the end-Permian extinction and found it barely changed! Brain evolution may have been put on hold for millions of years until ecosystems recovered. doi.org/10.1038/s415...
doi.org
Evolutionary stasis in synapsid encephalization during the end-permian mass extinction - Scientific Reports
Scientific Reports - Evolutionary stasis in synapsid encephalization during the end-permian mass extinction
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Kgusler @kgusler.bsky.social · 12/07/2026
phys.org
Larger brain, smaller face: Human evolution took a different course than previously thought
A new study, published July 6, 2026, in the journal Nature Communications, suggests that two of the best-known trends in human evolution—brain growth and the reduction in the size of the face and jaw—...
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Thomas R. Holtz, Jr. @arctomet.bsky.social · 01/07/2026
Unlocking the early evolution of brain and feeding strategies in Anseriformes: the case of Conflicto antarcticus royalsocietypublishing.org/rsos/article...
royalsocietypublishing.org
Unlocking the early evolution of brain and feeding strategies in Anseriformes: the case of Conflicto antarcticus
Abstract. The early Palaeocene Conflicto antarcticus reveals a mosaic pattern of brain and skull evolution relative to other Anseriformes. Despite its hype
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Royal Society Publishing @royalsocietypublishing.org · 07/07/2026
Unlocking the early evolution of brain and feeding strategies in Anseriformes: the case of Conflicto antarcticus: doi.org/10.1098/rsos... #RSOS #palaeontology #evolution
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Max Farnworth @maxfarnworth.bsky.social · 16/07/2026
www.biorxiv.org/content/10.6... This looks really cool!
biorxiv.org
Cerebellar Purkinje cells change dendritic architecture during primate evolution
Vertebrate evolution has driven adaptive remodeling of brain regions impacted by changing sensorimotor demands. The cerebellum—a hindbrain area mediating associative learning and predictive coding—is ...
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
What next? More data are needed. Higher-resolution measures of calories & complexity: temperature, latitude, oxygen, predators, prey, competition and measures of brains beyond size. Data here: cephdata.com 12/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Thank you to my co-authors - PhD / postdoc leads Kiran Basava & Theiss Bendixen; lead RA Alexander Leonhard; fab RA team Nicole Lauren George, Zoé Vanhersecke, Joshua Omotosho, & my co-PI and cephalopod expert Jennifer Mather. Data & code: github.com/kcbasava/... 13/13
github.com
GitHub - kcbasava/ceph-brain-evolution
Contribute to kcbasava/ceph-brain-evolution development by creating an account on GitHub.
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Brain data also only exists for 79 of ~820 living cephalopod species, and whole brain size misses lobe structure/neuron counts. The available species do span a wide range of sizes, habitats, & phylogeny, and sensitivity checks were consistent, but even so we don't have data for 90% of ceph. 11/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Important caveats: data and phylogenetically controlled models alone don't tell you the causal mechanism. That's why formal theory is useful - you can model assumptions and logic for possible mechanisms. A lot of the paper explains the role of theory in helping us interpret non-causal analyses. 10/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Sociality is the main difference b/w the ABH and SBH. SBH predicts more social species should have larger brains. Sociality was not reliably associated w/ larger brains - in fact perhaps the opposite. 9/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Depth also indicates shallower-living species tended to have larger brains. This fits the idea that shallower habitats are generally more calorie-rich, biodiverse, & more cognitively demanding than open-water habitats. Again, consistent w/ the ABH. 8/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
Results: consistent w/ ABH, ecology predicted brain size. Sociality didn't. The strongest predictor was habitat: cephalopods living on or near the shallow seafloors had larger brains than open water species. The relationship was enormous, ~2/3 as large as the body-brain size relationship. 7/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
The Asocial Brain Hypothesis says that while trial and error learning is less efficient than social learning, bigger brains can be favored when the environment is rich and complex enough that intelligence unlocks more calories & avoid predators. 5/
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Michael Muthukrishna @michael.muthukrishna.com · 15/07/2026
We preregistered the ABH predictions against the Social Brain & compiled the largest comparative brain dataset for cephalopods yet: 5 years 79 species 3,933 papers 115 variables coded a new phylogeny brain size, body size, ecology, sociality, & behavior 6/
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