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Marie Walde 🌊🦠🔬

@mariescopy.bsky.social
658 followers 549 following 51 posts

Biophysicist using #microscopy and image analysis to study eukaryotic #microbes ( #protists) in the #marine #plankton @roscoff-collection.bsky.social 🇩🇪🇫🇷 🦣 ecoevo.social/@mariescopy 🔬 mariescopy.github.io 📑 orcid.org/0000-0002-4071-7677

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Reposted by Marie Walde 🌊🦠🔬
Simon Cleary @simoncleary.bsky.social · 20h
Nikon: '"At this time, we don't see that any rules were violated," it said in a statement.' www.bbc.co.uk/news/article...
bbc.co.uk
Tiny image sparks big backlash in Nikon photo contest
Dr Ning Xu denies he broke the rules of Nikon's annual Small World In Motion contest.
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Iñaki Ruiz-Trillo @multicellgenome.bsky.social · 28/09/2026
We have a new branch in the family tree of animals: Atreyea- a previously unrecognized lineage among the closest unicell relatives of animals. Led by @konsmitsi.bsky.social & @freejakoba.bsky.social together with a fantastic team of collaborators. 🔗 papers.ssrn.com/sol3/papers.... #protistsOnSky
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Valentin Dunsing-Eichenauer @dunsingvalentin.bsky.social · 25/09/2026
#FluorescenceFriday: Given the recently grown interest in ciliary beating, here is a movie of beating cilia in a human airway model that I captured last week with lattice light-sheet microscopy. No AI „processing“, this is the raw data! Frame rate is ca. 170fps, displayed here at 25fps.
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napari @napari.org · 26/09/2026
🚀 napari is hiring Remote Developers-in-Residence! Join us to build the future of interactive n-dimensional data visualization in Python. 💻 60% Dev / 20% Maintenance / 20% Community & Outreach ⏱️ Contract, 14–35 hrs/wk 🌍 Global 100% Remote Learn more and apply today: napari.org/island-dispa...
napari.org
We’re hiring Developers-in-Residence! — napari blog documentation
Organization: napari (a NumFOCUS Sponsored Project) Position Type: Independent contractor agreement. Global, 100% Remote. Duration: One year, possibility to extend. Commitment: 0.4 to 1.0 FTE…
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Christophe 🔬 Leterrier @christlet.bsky.social · 22/09/2026
From the new info my bet is fluo labeling inference pushed to 11. Hallucinating nonsensical DAPI nuclei, mitochondria stain, membrane labeling from a kind of phase contrast image: wrong localization, wrong scale, wrong movement. Keeping this movie as SWiM winner is a disgrace to the competition
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paveltomancak.bsky.social @paveltomancak.bsky.social · 18/09/2026
In light of this growing controversy, I would like to direct attention to the stunning videos 2-31! www.nikonsmallworld.com/galleries/20...
nikonsmallworld.com
A tiny roundworm and a single-celled Dileptus explore their microscopic world | 2026 Small World in Motion Competition
Nguyen Nam Nhat - A tiny roundworm and a single-celled Dileptus explore their microscopic world
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Marie Walde 🌊🦠🔬 @mariescopy.bsky.social · 18/09/2026
The #microscopy community has serious concerns about this year’s winning #NikonSmallWorld in Motion video. @healthcare.nikon.com, could you please comment on the raw data and acquisition process to clarify whether AI was used? Transparency would help maintain confidence in the competition.
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Marie Walde 🌊🦠🔬 @mariescopy.bsky.social · 12/09/2026
"The most precious resources of our profession are students and ideas, [...] solving problems is only a tool and proxy for achieving the primary goal of conceptual understanding and insight."
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John Dolan @tintinnman.bsky.social · 12/09/2026
Sobering!! www.techtimes.com/articles/326...
techtimes.com
AI Paper Mills Now Taint One in Ten Cancer Studies: France Cuts Big Publisher Ties
AI paper mills now show up in nearly one in ten cancer research papers screened by machine learning, a 2026 BMJ study found, prompting France’s CNRS to cancel commercial database contracts and warn th...
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Christophe 🔬 Leterrier @christlet.bsky.social · 08/09/2026
So... an academic and an Anthropic employee used LLMs (including OpenAI models) to make decisive progress on the Navier Stokes resolution. Then OpenAI claimed to have done it and will not clearly disclose if it used access to the two researchers' LLM sessions to do so cims.nyu.edu/~tristanb/st...
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Julia Van Etten @couchmicroscopy.bsky.social · 13/07/2026
Cool video about the nitroplast that’s also a testament to why basic science is important! youtu.be/g9B3gBhcwqM?...
youtu.be
This cell just changed biology
YouTube video by Grist
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Julia Van Etten @couchmicroscopy.bsky.social · 04/09/2026
Our paper describing two new photosynthetic Paulinella species is out today in JPhycol! This is the kind of work I love to do and even it though took many years to finish, we had a lot of fun stomping around together in the marsh! onlinelibrary.wiley.com/doi/10.1111/... #protistsonsky
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Saloni @scientificdiscovery.dev · 05/09/2026
This is interesting. You get assigned to being born at a random place and time in history, to see what a typical person's life might have been like then. Unfortunately I was born in 1403 in the valley of Mexico and died at age 4 from dysentery.
anyhumanever.com
Any Human Ever
One life, drawn at random from all who have ever lived.
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Chloe Girard, PhD @chloegirard.bsky.social · 02/09/2026
I support Wikipedia, where information is still human-created, fact-checked, and 100% free. Join me! donate.wikimedia.org
donate.wikimedia.org
Make your donation now - Wikimedia Foundation
Donate to the Wikimedia Foundation, the nonprofit that hosts Wikipedia and other crucial free knowledge projects. Each year, the generosity of the 2% of readers who donate allows us to expand the reac...
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Reposted by Marie Walde 🌊🦠🔬
Dewi Langlet @dewilanglet.bsky.social · 21/08/2026
I'm happy to share two new #symbiosis papers freshly out of the press: - Symbiont shuffling in foraminiferal holobiont doi.org/10.1093/isme... #foramfriday - Ciliates symbionts in #deepsea shrimps doi.org/10.1111/jeu....
doi.org
Thermal responses and Symbiodiniaceae shuffling in a Red Sea foraminifer holobiont
Abstract. Symbiont-bearing benthic foraminifera, like corals, rely on endosymbionts for growth and nutrition and experience bleaching under heat stress. So
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Reposted by Marie Walde 🌊🦠🔬
jmutterer.bsky.social @jmutterer.bsky.social · 28/08/2026
I've made a video about Fig_Space, the next version of FigureJ. It has nice new features, I hope you like it. youtu.be/bTKcXN4p-JM
youtu.be
FigSpace Fiji plugin demo
YouTube video by jerome mutterer
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Ifremer 🌊 @ifremer.bsky.social · 10/08/2026
L'eau de mer est 🟤, 🟠, 🟢 ? Prenez une 📸 et faites avancer la science grâce à l'app #Phenomer de l’#Ifremer ! 🤳 👉 Infos : phenomer.org
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Florent Waltz @florentwaltz.bsky.social · 07/08/2026
We've been seeing a lot of "in situ" lately in titles from fancy journals (not pointing any fingers 👀). I’ve delayed posting this, but as more and more come out, I'm afraid "in situ" is becoming an empty buzzword, much like "near-atomic" was for SPA 🔬 1/n #cryo-ET #cryo-EM #cryoET #cryoEM 🧪
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Dave Barry @david-j-barry.bsky.social · 02/08/2026
From today, according to EU law, AI-generated content must be labelled as such.
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Universität Jena @uni-jena.de · 31/07/2026
For the first time, researchers from #UniJena and @leibniz-hki.de at @microverse.bsky.social have detected tiny membrane tunnels connecting social amoebae, serving as a communication and transport system. ➡️ www.uni-jena.de/en/434214/amo…
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John Burns @burnsajohn.bsky.social · 30/07/2026
I'm giving a public talk next Wednesday, August 5, on approaches to studying mid-water animals in situ. It will be light on technical details, and more conceptual and a journey to the deep than a regular science talk. Please join if you are interested! #marinelife www.bigelow.org/news/cafe-sc...
A chandelier siphonophore suspended in the deep Atlantic ocean.
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Christian Mosimann @chrmosimann.bsky.social · 25/07/2026
#2026SDB with amazing fluorescent imaging again. However, every session I attended so far has talks with red-green LUTs. 6-8% of us have color vision issues, especially for red-green. More visible color combos are easy to generate. As scientists, we can do better. 🧬🪰🐭🐟🧫🦎 #WeTheColorBlind #devbio
static.klipy.com
Rotating 'GREEN' Text in Red Circle
ALT: Rotating 'GREEN' Text in Red Circle
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Varsha Mathur @varshamathur.bsky.social · 21/07/2026
So happy to share our new paper out now in @natmicrobiol.nature.com! We establish Pirsonia-Coscinodiscus as a model pathosystem and uncover how this tiny parasite infects and kills bloom-forming marine diatoms 🌊🦠 rdcu.be/fuQyF
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Miguel Méndez Sandín @sandinmm.eurosky.social · 17/07/2026
Apparently the "boring billion" was actually exciting! We provide molecular evidence of complex Mesoproterozoic eukaryotic communities. So happy to see this out 🥳 Thanks to @phoebefossil.bsky.social , Hélène Morlon & @fburki.bsky.social for a lovely collab! doi.org/10.1073/pnas...
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Biozentrum, University of Basel @biozentrum.unibas.ch · 02/07/2026
New Assistant (tenure-track) or Associate Professor position in Climate #Biophysics! Join our international research community to explore fundamental molecular mechanisms underlying climate-relevant biological processes. Apply by 7 Sept 2026! www.biozentrum.unibas.ch/de/open-posi...
biozentrum.unibas.ch
Assistant/Associate Professor in Climate Biophysics
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 27/06/2026
Truly bizarre story of how two papers from the 1940s by physics pioneer Max Planck have been "retracted" from Naturwissenschaften, potentially by an algorithm, for anachronistic "plagiarism" issues, leaving the current editor baffled (but it is Springer Nature so.... www.science.org/content/arti...
science.org
Why have papers by one of history’s most famous physicists been retracted?
Springer Nature has removed two studies by Max Planck. A bot may be to blame
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HHMI @hhmi-science.bsky.social · 28/06/2026
These stunning single-celled organisms can shape-shift & regenerate. Their trumpet-like shape inspired their name: stentor, after the herald in Greek mythology known for his booming voice. 📸: Confocal microscopy by Igor Siwanowicz, HHMI’s Janelia Research Campus
Three stentors
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Anne Walraven @annewalraven.bsky.social · 27/06/2026
Very excited that the preprint of the main paper of my PhD is now out! We show that Meringosphaera is the first centrohelid with permanent plastids: doi.org/10.64898/202... @zlatogursky.bsky.social, @pjkeelinglab.bsky.social, prof. Rachel A. Foster, and @fburki.bsky.social #protistsonsky
doi.org
Single cell genomics and fluorescence microscopy suggest a permanent plastid in a marine centrohelid
Photosynthetic organelles (plastids), which originated via primary endosymbiosis between an Archaeplastida ancestor and cyanobacteria, have shaped the Earth's oxygen-rich atmosphere and spread across ...
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Johannes Hohlbein @hohlbeinlab.bsky.social · 19/06/2026
You might have heard about our GitHub repository on #OpenMicroscopy. I finally vibecoded a page that (a) allows to search all entries and (b) generates a new database as soon as items are added on GitHub: hohlbeinlab.github.io/OpenMicrosco... Check it out and comments welcome!
hohlbeinlab.github.io
Open Microscopy — Resource Index
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Toni Gabaldón @tonigabaldon.bsky.social · 10/06/2026
Our paper "Gene ancestries reveal diverse microbial associations during eukaryogenesis.” is finally out in Nature. Eukaryogenesis was likely a gradual process shaped by multiple microbial partners and virus-mediated gene transfer, rather than a single binary symbiosis. doi.org/10.1038/s415...
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Guy Leonard @guyleonard.eurosky.social · 08/06/2026
Tadpole Doctor: a UK-based citizen science project that identifies novel Perkinsea clades closely related to candidate amphibian pathogens academic.oup.com/ismecommun/a...
academic.oup.com
Tadpole Doctor: a UK-based citizen science project that identifies novel Perkinsea clades closely related to candidate amphibian pathogens
Abstract. Parasites of the Perkinsea lineage infect both unicellular eukaryotic and metazoan hosts. The Pathogenic Perkinsea Clade (PPC) has been associate
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Virginie Uhlmann @virginieuhlmann.bsky.social · 01/06/2026
📢📢 We are hiring a Bioimage Analyst at the BioVisionCenter! 📢📢 Join our collaboration with the Flow Cytometry Facility and contribute back to the international efforts on open standards for bioimaging data! More information here, reach out if you have any question: jobs.uzh.ch/job-vacancie...
jobs.uzh.ch
UZH: Bioimage Analyst
The University of Zurich is the largest university in Switzerland and one of the most prominent in Europe. For research purposes the Biovision Center and Flow Cytometry Facility offer services to supp...
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Marie Walde 🌊🦠🔬 @mariescopy.bsky.social · 05/06/2026
Hacking spirit in Roscoff during our "Smart DIY Microscopy for Marine Biology" inspired by #MIFOBIO last year. We jointly assembled new #EnderScope systems for marine research. 🌊🔬💻 Big thanks to 💙EnderTeam 💙@embrc-france.bsky.social 💙@gdrimabio.bsky.social 💙@sbroscoff.bsky.social
A group of people listening to a presentationAn EnderScope with a multiwell dish containing small bits of different algaeAn EnderScope next to a big screen showing python codeA group of scientists visiting the historic aquarium of the Station Biologique de Roscoff
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Earth BioGenome Project 🌍 @ebpgenome.bsky.social · 04/06/2026
🧬 Diatoms are an extraordinarily diverse group of photosynthetic organisms, with tens of thousands of described species. Yet technical challenges still limit large-scale diatom genome production. EBP projects and biodiversity genomics R&D teams are working to solve them. 🌊🔬 #Diatoms #Biodiversity
Collage of microscopic images showing the remarkable diversity of diatoms. The slide title reads, “Why Is Sequencing Diatom Genomes So Difficult?” with the word “Difficult” highlighted in yellow. The background contains multiple light microscope photographs of different diatom species displaying a wide range of shapes and forms, including elongated needle-like cells, circular forms, rectangular chains, ornate geometric structures, and filamentous colonies. Some cells appear golden-brown due to photosynthetic pigments, while others show intricate silica patterns visible under magnification. The collage emphasizes the extraordinary morphological diversity found across diatoms.
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Arnaud Raoux @physicochimix.bsky.social · 31/05/2026
www.lesnumeriques.com/informatique... "Le logiciel libre l’emporte : Polytechnique dit non à Microsoft"
lesnumeriques.com
Le logiciel libre l’emporte : Polytechnique dit non à Microsoft et déclenche une vague de rébellion dans les universités
C'est un coup de théâtre qui secoue le monde de l'enseignement supérieur et de la tech française. Après des mois d'une guerre de tranchées juridique, la direction de l'École polytechnique a officielle...
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Julie Meilland @juliemeilland.bsky.social · 29/05/2026
We got our first common paper out #theLifeOfRetaria with @sandinmm.bsky.social , @raphaelmorard.bsky.social, @nicolecoots.bsky.social, @mattgr3co.bsky.social, Nicolaas Glock and Natalia Llopis-Monferrer - first product of our seminar series! check it out! onlinelibrary.wiley.com/doi/abs/10.1...
onlinelibrary.wiley.com
Unifying Retaria Research: A Common Framework for Studying Foraminifera and Radiolaria
Research on Foraminifera and Radiolaria has predominantly focused on their fossil remains. This synthesis identifies the “Big Five” disciplines of a unified Retaria research: diversity and evolution,...
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The Marine Biological Association @thembauk.bsky.social · 28/05/2026
UK researchers have shown how the distributions of two toxin-producing phytoplankton groups have changed across the North East Atlantic over the last six decades using data from the Continuous Plankton Recorder (CPR) Survey.
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Ocean Census @oceancensus.bsky.social · 19/05/2026
📣 ANNOUNCEMENT 📣 In a landmark third year for the Ocean Census, we announce the discovery of 1,121 new marine species in a single year - a 54% increase in annual species discovery. Dive into the full announcement: oceancensus.org/press-releas...
oceancensus.org
Over 1,100 New Marine Species Discovered | Ocean Census
Scientists discover over 1,100 new marine species in landmark Ocean Census - the world’s largest mission to accelerate species discovery.
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Gaëlle Recher @gaellerecher.bsky.social · 18/05/2026
🔈 PhD offers! 2 PhD positions available at the BiOf-lab 🎓 Fancy 3D biology? Microscopy? Microfabrication? Bordeaux? 🧫 🔬 🛠️ 🍷 the first one is already online, the other will be out soon! (stay tuned) adum.fr/as/ed/voirpr...
adum.fr
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Elizabeth Beston @elizabethbeston.bsky.social · 18/05/2026
A timelapse of cellular activity inside a dinoflagellate cell, species Noctiluca scintillans (sea sparkle). There were lots and lots of these in a plankton sample from Harwich this weekend, so keep an eye out for bioluminescence in the coastal waters there! #marineplankton #phytoplankton
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anil oza @aniloza.bsky.social · 14/05/2026
wow — the preprint host, arxiv, is banning authors for a year if they submit papers with hallucinated citations 🤖
Twitter thread from Thomas Dietterich, reading "Attention 
@arxiv
 authors: Our Code of Conduct states that by signing your name as an author of a paper, each author takes full responsibility for all its contents, irrespective of how the contents were generated. 1/
3:03 PM · May 14, 2026
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Thomas G. Dietterich
@tdietterich
·
1h
If generative AI tools generate inappropriate language, plagiarized content, biased content, errors, mistakes, incorrect references, or misleading content, and that output is included in scientific works, it is the responsibility of the author(s). 2/
Thomas G. Dietterich
@tdietterich
·
1h
We have recently clarified our penalties for this. If a submission contains incontrovertible evidence that the authors did not check the results of LLM generation, this means we can't trust anything in the paper. 3/
Thomas G. Dietterich
@tdietterich
·
1h
The penalty is a 1-year ban from arXiv followed by the requirement that subsequent arXiv submissions must first be accepted at a reputable peer-reviewed venue. 4/
Thomas G. Dietterich
@tdietterich
·
1h
Examples of incontrovertible evidence: hallucinated references, meta-comments from the LLM ("here is a 200 word summary; would you like me to make any changes?"; "the data in this table is illustrative, fill it in with the real numbers from your experiments") end/"
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Joachim Goedhart @joachimgoedhart.bsky.social · 14/05/2026
Hypercompetition, score compression and AI co-authorship: a perfect storm for grant success rates link.springer.com/article/10.1...
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Roscoff Culture Collection @roscoff-collection.bsky.social · 12/05/2026
Rencontre Immersion - 28/04/2026. You can find the article (in French) here: www.campusmer.fr/actualites-1... and a movie here : www.youtube.com/watch?v=jXzs...
campusmer.fr
15ᵉ Rencontre Immersion : au cœur des ressources marines à la Station biologique de Roscoff
Derniers articles d'actualité des acteurs sciences et technologies du Campus mondial de la mer, en Finistère (Roscoff, Morlaix, Brest, Quimper, Concarneau, Lorient)
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Ross Floate @rossfloate.bsky.social · 08/05/2026
Oh my. This is spectacular. sinceyouarrived.world/taken
sinceyouarrived.world
taken.
A web page that tells you what your browser gave away the moment you arrived. No login, no form, no permission. Most pages do this. None of them tell you.
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Felix Leinemann @felixleinemann.eurosky.social · 23/04/2026
To help shape the #EUOceanAct, a legislative proposal by end 2026 to support the #EUOceanPact🌊📜, @ec.europa.eu just launched a public consultation 👇 #EUHaveYourSay how 🇪🇺 should: 🎏 streamline EUOceanGovernance 🗺️ modernise #maritimespatialplanning 👁️ governance of #OceanEye 🌿protect marine environment
oceans-and-fisheries.ec.europa.eu
Commission launches public consultation on the European Ocean Act
Today, the Commission launched a public consultation to help shape the European Ocean Act, a key legislative proposal under the European Ocean Pact, set for adoption in 2026.
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Science Magazine @science.org · 05/05/2026
Deepfakes are everywhere, but digital forensics investigators are fighting back. Learn more: scim.ag/42dMPBg
To verify images, digital forensics investigators will often check whether the geometry of the scene is realistic. In a real photo, lines that run parallel in reality—like floor tiles—should meet at a single vanishing point. In this image, however, the dotted lines do not meet in a single point, indicating it is a fake.
Image: an AI-generated image of soldiers marching down a hallway in three lines, wearing fatigues and carrying rifles. Four dotted white lines have been added over the image, running along the floor tiles visible in the foreground and extending back to where the vanishing point should be, behind the soldiers. Instead of meeting in a single point, the lines all cross at different points.Investigators also examine reflections. The lines connecting points on an object to matching points in its mirror image run parallel in reality, so similarly should meet at a vanishing point. In this image, the lines again do not converge on one point, revealing it to be a fake.
Image: An AI-generated image of a plastic cartoon dinosaur toy with its reflection visible in a small mirror. Four dotted white lines are layered over the image, connecting points on the toy with the same points on its reflection: the top of its eye, the end of its jaw, its hand, and its foot. The lines extend out to the side of the image, where they all cross at different points rather than meeting at a single point.Shadows can be a giveaway, too. Because the Sun is so far away, its rays are essentially parallel when they reach Earth's surface. That means that the lines connecting points on an object to the shadows they cast in sunlight should also intersect at a vanishing point. In this Al-generated image, that is clearly not the case.
Image: An AI-generated image of colorful, semi-transparent plastic cubes arranged in a group in a city plaza. Six dotted white lines are layered over the image, connecting corners of several cubes with the corresponding corners in their shadows. The lines extend upward off the edge of the image, toward where a vanishing point should be. Three of them converge on roughly the same point, but two extend further, and one cuts across all the others at an angle.
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Megan Sorensen @messorensen.bsky.social · 30/04/2026
Interested in working on the evolution of photosynthetic endosymbioses? Come join us! I have 2 open positions in my new group @cemess.bsky.social in Vienna 3yr postdoc info: tinyurl.com/4emkjpn4 4yr PhD info: tinyurl.com/mtxmsjpy Apply by 1st June! Please share/repost #Protists #Symbiosis #PhD
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David Bartram @dbartram.bsky.social · 26/04/2026
No need to look up every reference manually. Copy/paste the bibliography here: zabbonat.github.io/References-V... (You could check non-matches using the google scholar button) Yes, it's the editor's job (I do it), but many editors are overwhelmed too.
zabbonat.github.io
CheckIfExist - Academic Reference Validation Tool
Free online tool to verify academic references and citations against CrossRef, Semantic Scholar, and OpenAlex.
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Fabien Burki @fburki.bsky.social · 18/04/2026
academic.oup.com/microlife/ar... #protistsonsky
academic.oup.com
Living together: evolutionary and ecological dimensions of protist endosymbiosis
From symbionts to organelles: evolutionary integration of microbial partners into eukaryotic cells.
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Miguel Méndez Sandín @sandinmm.eurosky.social · 17/04/2026
Hot off the press! We are sharing oligoN-design, an open-source tool to find specific probes and primers from large molecular datasets, without relying on specific databases, alignments or phylogenetic trees. @mariescopy.bsky.social @rmassanam.bsky.social @beaplab.bsky.social doi.org/10.1111/1755...
doi.org
OligoN‐Design: A Simple and Versatile Tool to Design Specific Probes and Primers From Large Heterogeneous Datasets
High-throughput environmental DNA sequencing has ushered ecological and evolutionary studies into the big data era. With thousands to millions of DNA sequences, designing taxon-specific oligonucleoti...
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