Johannes Kappel
@johanneskappel.bsky.social
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📥 679
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Neuroscientist, working on connectomics & cognition. EMBO Postdoctoral Fellow @ FMI Basel 🇨🇭
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Johannes Kappel
John Tuthill
7 days ago
Our digital sphinx shows that DRL is so powerful that it finds a solution even when the constraints are completely wrong: worm brain, fly body, zero cellular and circuit compatibility. Give it a target behavior, it fits. It doesn't care about biology Code:
github.com/Brunton-Lab/DigitalSphinx2026
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GitHub - Brunton-Lab/DigitalSphinx2026: The digital sphinx: Can a worm brain control a fly body?
The digital sphinx: Can a worm brain control a fly body? - Brunton-Lab/DigitalSphinx2026
https://github.com/Brunton-Lab/DigitalSphinx2026
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John Tuthill
7 days ago
🧵 New preprint led by
@bingbrunton.bsky.social
,
@elliottabe.bsky.social
,
@lawrencehu.bsky.social
We gave a worm brain control of a fly body and it walked What did we learn? Nothing, other than deep reinforcement learning is effective We call it the digital sphinx
www.biorxiv.org/content/10.6...
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tante
19 days ago
The whole "AI" industry is just based on the hope that they can deskill people fast enough that they'll have to rent back cognitive support systems. Forever. It's like Uber. Just that they don't try to break existing transportation infrastructures but your brain.
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Gisella Vetere
20 days ago
How does the brain build a memory? A common assumption is that the neurons activated during an experience collectively form the memory engram. In our new Nature Neuroscience paper (finally out!), we show that this is not the case.
www.nature.com/articles/s41...
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Deconstruction of a memory engram reveals distinct ensembles recruited at learning - Nature Neuroscience
Pouget et al. identified distinct CA1 neuron ensembles active during specific moments of fear learning and uncovered the core engram essential for memory formation.
https://www.nature.com/articles/s41593-026-02230-2
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Benjamin Judkewitz
27 days ago
First whole-brain recording of social sound processing in a vertebrate. Surprises start in the hindbrain; thalamus gates conspecific calls; male and female brains diverge downstream. Work by
@joerghenninger.bsky.social
,
@mh123.bsky.social
sky.social
and team.
www.biorxiv.org/content/10.6...
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Colette Delawalla
29 days ago
This is a very important story. Thank you
@science.org
for covering it. Two critical points: 1. SIMPLE INVESTIGATION! 2. Notice how not being desperate for money leads people to use good judgement? This is why philanthropy isn't going to fix what Trump has done to our scientific ecosystem.
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Jeremy Berg
about 1 month ago
I have a male friend who spent some time in Axel's lab. About the 3rd conversation he had with Axel, Axel broke the ice with "So, have you fucked [a female postdoc in the lab] yet?" My friend was horrified...
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Kyle Griffin
about 1 month ago
Breaking: Richard Axel, a Nobel Prize-winning scientist and professor, just announced that he was resigning as a co-director of a flagship neuroscience institute at Columbia University because of his friendship with Jeffery Epstein.
www.nytimes.com/2026/02/25/n...
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Leader of Columbia Brain Institute Quits Over Friendship With Epstein
https://www.nytimes.com/2026/02/25/nyregion/columbia-nobel-winner-epstein-resigns.html?smid=nytcore-ios-share
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Elizabeth Jacobs, PhD
about 1 month ago
A new paper shows that less than 2 months of exposure to Twitter’s algorithmic feed significantly shifts people’s political views to the right. Moving from chronological feed to the algorithmic feed also increases engagement. This is one of the most concerning papers I’ve read in awhile.
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Nathan Kalman-Lamb
about 1 month ago
“I don’t want to be in this place I want to go to my school.” - 7 year old imprisoned by ICE for 70 days in a concentration camp in Texas. Today, after
@propublica.org
published this story, the camp was raided to confiscate letters from the children.
www.propublica.org/article/ice-...
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Andrew Saxe
about 1 month ago
Excited to launch Principia, a nonprofit research organisation at the intersection of deep learning theory and AI safety. Our goal is to develop theory for modern machine learning systems that can help us understand complex network behaviors, including those critical for AI safety and alignment. 1
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Mark Histed
about 2 months ago
In terms of what cures are being lost: - Epstein-Barr virus is perhaps the major trigger for multiple sclerosis - herpes simplex virus causes cold sores, genital herpes, infections in babies, deadly meningitis - shingles virus causes an intensely painful disease
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Ciarán Murphy-Royal
about 2 months ago
Really nice work from the Holmes lab looking at amygdala astrocytes in fear memory and extinction!
www.nature.com/articles/s41...
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Astrocytes enable amygdala neural representations supporting memory - Nature
Astrocytes in the basolateral amygdala dynamically track fear state and support fear memory retrieval and extinction.
https://www.nature.com/articles/s41586-025-10068-0
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🤙
about 2 months ago
No joke: I got angry hate mail today for writing an obituary of a Black woman scientist—because the person felt she did didn’t deserve the recognition. Which just makes me want to share it again:
www.nature.com/articles/d41...
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Gladys Mae West obituary: mathematician who pioneered GPS technology
She made key contributions to US cold-war science despite facing huge barriers as a Black woman.
https://www.nature.com/articles/d41586-026-00254-z
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“The human body is an obstacle to efficiency — the limited head, the distracted heart, the tired limbs. Taking things inside saps energy and time, retaining them takes up space; and all for occasional use, if at all.”
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about 2 months ago
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Olivia Guest · Ολίβια Γκεστ
about 2 months ago
The only surprise is they admit it
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Christian Cazares, Ph.D.
about 2 months ago
hahahaha what
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mark cembrowski
2 months ago
Save the date for the annual "Neural Circuits and Behaviour" satellite conference at the Canadian Association for Neuroscience annual meeting, cohosted by
@franklandlab.bsky.social
and myself on May 18, 2026. We have a great speaker lineup and will be selecting 4 trainees talks from our registrants!
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Joel Boerckel
3 months ago
Defending PhD student, looking over their thesis: “If I knew then what I know now, I could’ve done all of this in like 9 months.” A thread about my favorite pioneering cave explorers and why I don’t think AI will ever “solve” biology.
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Chris J Dallmann
3 months ago
How does the brain control locomotion? In our new preprint, we uncover a brain circuit in Drosophila that controls forward walking independently of turning. This dedicated locomotor circuit enables flexible motor control and might reflect a shared principle across species.
doi.org/10.64898/202...
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Brandon Friedman
3 months ago
What in the Gestapo is going on in Grand Rapids? Watch this activist get arrested *mid-interview* for speaking out against U.S. action in Venezuela.
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Johannes Felsenberg
3 months ago
Carolin Warnecke together with Hanna, Dennis, Bene & Kerstin from my lab show that re-exposure to reward diminishes multiple associated olfactory memories. We’re hiring 2 postdocs—DM/email me for details.
#Postdoc
#Hiring
www.sciencedirect.com/science/arti...
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Re-exposure to reward re-evaluates related memories
To adapt behavior in changing environments, animals must continuously re-evaluate previously learned associations. This flexibility of memory systems …
https://www.sciencedirect.com/science/article/pii/S0960982225015969
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FMI science
4 months ago
📢 Please help spread the word: We’re hiring a Head of Student & Postdoc Affairs to coordinate our international PhD program, provide guidance & career counseling, lead training programs, collaborate on EDI initiatives, and manage alumni relations. Apply at
www.fmi.ch/education-ca...
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Portugues Lab
3 months ago
1/n: A new collaborative preprint from the lab to start the year: "A multi-ring shifter network computes head direction in zebrafish" together with Siyuan Mei, Martin Stemmler and Andreas Herz from the LMU, Munich.
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Matthew Cobb
3 months ago
That’s quite the pivot from LeCun who disagreed vigorously (let us say) with
@garymarcus.bsky.social
on this issue for quite some time…
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Magnus Johansson
3 months ago
"40 percent of MRI signals do not correspond to actual brain activity"; "Since tens of thousands of fMRI studies worldwide are based on this assumption, our results could lead to opposite interpretations in many of them.”
www.tum.de/en/news-and-...
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40 percent of MRI signals misinterpreted
Interpretation of numerous MRI data may be incorrect: blood flow is not a reliable indicator of brain activity.
https://www.tum.de/en/news-and-events/all-news/press-releases/details/40-percent-of-mri-signals-do-not-correspond-to-actual-brain-activity
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NY Times Pitchbot
3 months ago
If the Romans had simply deported woke baby Jesus to South Sudan, a lot of trouble could have been avoided
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MadScientist
3 months ago
This is exactly why people claiming "it came up with a new set of experiments/ideas/concepts" are carrying water for the weasels trying to put genAI on everything. This is how we get science defunded. This is how your colleagues lose their jobs 🧪
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Carl T. Bergstrom
3 months ago
I wouldn't describe Jay as "man in the middle" unless I were making sort of human centipede analogy.
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Jan M. Ache
3 months ago
How do animals channel sensory information into motor pathways to generate flexible behavioral output? Excited to share a new preprint addressing this question by leveraging the new
#maleCNS
connectome, behavioral experiments, and in-vivo recordings:
doi.org/10.64898/202...
. A long🧵...
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Inbal Shainer
3 months ago
Very proud to see our paper selected as one of Nature’s 2025 highlights!
@johanneskappel.bsky.social
@jlarsch.bsky.social
@mpiforbi.bsky.social
www.nature.com/articles/d41...
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Asteroids, antibiotics and ants: a year of remarkable science
Highlights from News & Views published in 2025.
https://www.nature.com/articles/d41586-025-03807-w
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Dinu F Albeanu
4 months ago
Adam Kampff’s passion for understanding and explaining the world was unmatched. Living by example and not ever compromising on his dreams, Adam was uncanny in making people realize they can learn and understand anything and everything. Keep his dream alive! In his own words:
tinyurl.com/ye29csw3
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Dr Emma Hodcroft
4 months ago
Best Christmas Card of 2025 award goes out to the
@biozentrum.unibas.ch
for this incredible building-themed-advent-calendar! Opening a window each day has been fantastic! ❄️☃️😁
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Andrew Middleton
4 months ago
I'm no purist when it comes to participating in things we all know are bad. I try to reduce my harm but I'm an honest hypocrite. I won't judge you for still using Spotify, just try this rad alternative. I'm listening to music from Dar es Salaam. Where will you listen to?
radio.garden/listen/furah...
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Explore live radio by rotating the globe
Explore live radio by rotating the globe.
https://radio.garden
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Rui Costa
4 months ago
Last night Adam Kampff, the glue, the light, the catalyst, the builder, the smile, left us. He and his work transformed the lives of many labs, scientists, students. He inspired and was generous to his last transformation, working tirelessly to set up a foundation to continue the work.Thank you!
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Tim Vogels
4 months ago
"Spiking Networks Hate It! Find Out the One Plasticity Trick They Don’t Want You to Know! Never stabilise models by hand again." - I woke up thinking we missed an opportunity with the title of this one. :/
www.science.org/doi/10.1126/...
Also: It snowed in Vienna, 10cm white fluffies! Happy Sunday!
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Inhibitory Plasticity Balances Excitation and Inhibition in Sensory Pathways and Memory Networks
Plasticity at inhibitory synapses maintains balanced excitatory and inhibitory synaptic inputs at cortical neurons.
https://www.science.org/doi/10.1126/science.1211095
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Maggie Harrison Dupré
4 months ago
NEW: Elon Musk's Grok chatbot will, with minimal prompting, provide residential addresses of everyday Americans. Prompts as simple as "[name] address" immediately returned accurate home addresses of private citizens — alongside other personal info we didn't ask for.
futurism.com/future-socie...
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Richard Gao
4 months ago
Finally got the job ad—looking for 2 PhD students to start spring next year:
www.gao-unit.com/join-us/
If comp neuro, ML, and AI4Neuro is your thing, or you just nerd out over brain recordings, apply! I'm at neurips. DM me here / on the conference app or email if you want to meet 🏖️🌮
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Georg Keller
4 months ago
One of the most promising approaches to making headway in understanding the cortical algorithm that I have seen in a long time!
www.biorxiv.org/content/10.1...
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Understanding cortical computation through the lens of joint-embedding predictive architectures
Tracking prey or recognizing a lurking predator is as crucial for survival as anticipating their actions. To guide behavior, the brain must extract information about object identities and their dynami...
https://www.biorxiv.org/content/10.1101/2025.11.25.690220v1
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Markus Meister
4 months ago
Come on Konrad, why do you cave so easily? Here, let me try it for you: 1. Spikes are (to good approximation) the only events that matter. 2. Extracellular fields are one way by which spikes interact with each other. 1/2
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"[...], in principle, the humans on our team could have come up with it unaided. Nevertheless, we only found it after constructing the AI system."
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4 months ago
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Hagen Blix
4 months ago
Capitalism certainly does not fund science to speak truth to power. But precisely because science cannot make due without a concept of truth, it sometimes cannot help but speak truth to power anyways. An obvious case is climate change, where scientific truth conflicts clearly with the profit motive.
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Hagen Blix
4 months ago
In applying AI to material science, biology, etc, capitalism is trying to shed science. The point is to substitute the engineering of a machine that can generate what science has hitherto done, but without having people know things. Knowledge ultimately residing in private property is the dream.
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Jeff Bezos Creates A.I. Start-Up Where He Will Be Co-Chief Executive
https://www.nytimes.com/2025/11/17/technology/bezos-project-prometheus.html
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Grace Lindsay
5 months ago
It is actually an incredibly frustrating time to be a theoretical neuroscientist right now imo, for this reason
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Paolo Crosetto
5 months ago
What is the most profitable industry in the world, this side of the law? Not oil, not IT, not pharma. It's *scientific publishing*. We call this the Drain of Scientific Publishing. Paper:
arxiv.org/abs/2511.04820
Background:
doi.org/10.1162/qss_...
Thread
@markhanson.fediscience.org.ap.brid.gy
👇
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Ketan Joshi
5 months ago
To me, this is one of the key aspects of generative AI's broader environmental, social and climate harm: it cannot exist in an efficient, lean and narrowly applied way. It only ever looks like it "works" when it's brute-forced: just like Bitcoin. The harm is baked into its characteristics.
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Artificial Intelligence Wants to Sell You Stuff While the World Burns
Meta is betting on generative AI for a new generation of aggressive advertising. It requires immense energy, much of which will likely come from fossil fuels.
https://newrepublic.com/article/202864/meta-generative-ai-ads-emissions
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Eugene Vinitsky 🍒
5 months ago
What if we did a single run and declared victory
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Josh Moody
6 months ago
MIT rejects "compact" proposed by the Trump administration. MIT prez wrote: it "would restrict freedom of expression and our independence as an institution" and "is inconsistent with our core belief that scientific funding should be based on scientific merit alone."
orgchart.mit.edu/letters/rega...
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Regarding the Compact | MIT Organization Chart
https://orgchart.mit.edu/letters/regarding-compact
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Richard Gao
6 months ago
I've been waiting some years to make this joke and now it’s real: I conned somebody into giving me a faculty job! I’m starting as a W1 Tenure-Track Professor at Goethe University Frankfurt in a week (lol), in the Faculty of CS and Math and I'm recruiting PhD students 🤗
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Stand Up for Science!
7 months ago
You asked for it! We delivered Quack-O-Grams to our members of Congress urging them to #ImpeachRFK, and get that Quack out of office! There's still time for you to get in on this fluffy, feathery action: Send your own duck at
zurl.co/W1ZnB
#ImpeachRFK
and keep the momentum going! 🦆
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