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Brenhin Keller

@brenhinkeller.bsky.social
1.4K followers 836 following 127 posts

Assistant Prof. of Earth Sciences, Dartmouth College Geochronology | Petrology | Earth History | Computational Science | HPC | #julialang | he/they

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Reposted by Brenhin Keller
Advances in Geochemistry and Cosmochemistry @weareagc.bsky.social · 21/02/2025
Wondering how to format your manuscript to submit to AGC? Here is a quick guide. Find out more here buff.ly/3CIZEuf
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naturepoker @binomicalabs.org · 06/03/2026
#Julialang folks, did you check out Tachikoma.jl TUI framework yet? It looks pretty wild. I'm thinking of testing it out as a frontend for a bioinfo dashboard for a collaborator. Hope the author is planning on giving a talk at the upcoming JuliaCon! github.com/kahliburke/T...
github.com
GitHub - kahliburke/Tachikoma.jl: Build rich terminal apps in Julia — widgets, layouts, sixel graphics, Kitty graphics, animations, and more
Build rich terminal apps in Julia — widgets, layouts, sixel graphics, Kitty graphics, animations, and more - kahliburke/Tachikoma.jl
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Ben Collins @bencollins.bsky.social · 28/02/2026
I can't fucking believe we're doing this again.
This War Will Destabilize The Entire Mideast Region And Set Off A Global Shockwave Of Anti-Americanism vs. No It Won’t
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laitalageoscience @laitalageoscience.bsky.social · 25/02/2026
Our new open access article in Terra Nova: Evolution Model for the Paleoproterozoic Talvivaara Mudstone-Hosted Ni-Zn-Cu-Co Deposit in Fennoscandia. Lahtinen, R., Laitala, J.J., Virtasalo, J.J. and Whitehouse, M.J. 2026 (in press). Terra Nova, 1–12. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia
You have to enable JavaScript in your browser's settings in order to use the eReader.
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Jeanne Timmons @mostlymammoths.bsky.social · 18/02/2026
Wow! 2025: Host-specific leaf-mining behaviour of holometabolous insect larvae in the early #Permian #ichnology #paleobotany #palaeobotany Michael Laaß, Ludwig Luthardt, Steffen Trümper, Angelika Leipner, Norbert Hauschke & Ronny Rößler
From paper: Co-occurrence of endophytic oviposition and Asteronomus maeandriformis in Autunia conferta. (a) Mass occurrence of oviposition scars, which likely housed unhatched eggs (NHMS Ap 37/5). (b) Sketch of (a) showing the distribution of the oviposition scars on the pinnule. (c–e) Oviposition scars with ovipositor slits (arrows) (NHMS Ap 37/5). (f) Oviposition and leaf mining on small Autunia conferta pinnules (MB.Pb.1979/0012). (g) Enlargement of the area in (f). Note the callus tissue surrounding the oviposition sites. (h) Leaf mines and oviposition scars on Autunia conferta (MB.Pb.1979/0014). (i) Irregularly distributed oviposition scars on Autunia conferta (MB.Pb.1979/0020).From paper: Thin sections of Asteronomus maeandriformis in Autunia conferta from Crock, Thuringian Forest Basin, Germany. (a) Section through an Autunia conferta leaf (MB.Pb.1979/0188) with frass trail (box). The scrolled margins indicate the upper side of the pinnule. (b) Section through the frass trail in (a). Note the upper epidermis (arrow), which covers the tunnel. (c) Another example of a compressed tunnel in the upper parenchyma covered by the upper epidermis (arrow) (MB.Pb.1979/0179). (d) Transverse and longitudinal sections through endophytic frass trails in Autunia conferta (MB.Pb.1979/0188). (e, f) Longitudinal section through a frass trail (MB.Pb.1979/0069). Note the calcite-filled cracks and the thin calcite cover on the upper side of the leaves from shrinkage of the organic matter in (arrows in f).
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JuliaCon 2026 @juliacon.org · 18/02/2026
@gaussmug.bsky.social , Samuel Omlin and @rayegun.com are hosting a minisymposium on High-Performance Computing at JuliaCon 2026! Submit your talks until Februrary 28th at juliacon.org/2026/cfp #julialang #hpc
The Julia for High-Performance Computing (HPC) minisymposium at JuliaCon is one of the main events of the year for the Julia for HPC community, bringing together HPC and Julia experts to present and discuss recent advances that make Julia a powerful language for HPC.
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Brenhin Keller @brenhinkeller.bsky.social · 18/02/2026
This whole saga is amazing 1) Bot makes PR to matplotlib; it's closed as slop 2) Bot writes blog post attacking matplotlib maintainer 3) Ars Technica article about this 4) Article gets retracted for fake quotes (AI again!) 5) It was a crypto grift all along social.treehouse.systems/@ariadne/116...
social.treehouse.systems
Ariadne Conill 🐰:therian: (@ariadne@treehouse.systems)
https://www.moltbook.com/post/87fa7a31-e139-4a2d-954f-89e782134d8f hmm, seems the owner of this bot that harassed the matplotlib maintainer is a crypto bro
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Daniel Axtens @daxtens.bsky.social · 11/01/2026
Tragic: local man wants to solve technical problems at scale, realises that at scale they’re all ultimately social problems
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Dr. Brendan Anderson @fossilsndcoffee.bsky.social · 02/12/2025
This #givingtuesday please consider donating to the Paleontological Research Institution/Museum of the Earth PRI is a major US fossil collection and education center & has been struggling after a major donor was unable to fulfill a pledge but is almost out of the woods, any support helps! 🦑⚒️🧪🐌🐚
Graphic that says I'm supporting PRI today because it's where my type specimen is with a picture of a Vermicularia (snail) apex. The PRI logo is in the bottom right and text reads www.priweb.org/donate
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Department of Earth and Planetary Sciences at Dartmouth @dartmouthears.bsky.social · 28/10/2025
We are looking to hire a full-time tenure-track Assistant Professor in the general areas of stable isotope biogeochemistry and/or geobiology! For more information and to apply see apply.interfolio.com/176517 -- review begins November 15!
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
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GHOULology Johnson @geologyjohnson.bsky.social · 18/10/2025
Pyritised, metamorphosed, and faulted #Archean microbial mats from South Africa. I love the colours on this one. #geology #paleontology
Photo of a rock with alternative wrinkly dark green and light green layers. There is a layer in the middle composed of brass colored polygonal pyrite crystals. A white scale bar shows that the rock is about 2 cm wide.
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Brendan O’Neill @permafrostee.bsky.social · 04/09/2025
Here’s a really nice alluvial fan I thought you should see
A really nice alluvial fan
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Kenneth Becker @geophotographer.org · 14/08/2025
Check out these photos of the Tracy Arm Landslide to help get an idea of just how big it is. 📷 © Jacek Maselko and posted by AEC, taken at 3,500ft elevation on Tuesday, August 12th. AEC page earthquake.alaska.edu AEC Facebook post www.facebook.com/share/1Fzmxn... 🧪⚒️🌊 #alaska #tsunami #landslide
The image depicts a mountainous landscape with steep cliffs prominently visible in the foreground. The rock faces are textured with varying shades of gray, brown, and areas of green vegetation. A small body of water with a frothy surface lies at the base of the cliffs. In the background, a range of snow-capped mountains stretches across the horizon under a sky filled with thin, layered clouds. The overall scene has a rugged and expansive natural beauty.The image depicts a rugged mountain landscape featuring towering, snow-capped peaks under partly cloudy skies. The mountains are steep and rocky with patches of green vegetation on the lower slopes. A mixture of brown and gray rock is visible, contrasting with the white snow. At the base of the mountains lies a glacial area, showing large, sharp ice formations with a distinct blue tint. A small lake of muddy water is surrounded by chunks of ice. The foreground features green foothills. The overall setting is vast and remote, evoking a sense of untouched wilderness.The image depicts a mountainous landscape with steep, rocky peaks partially covered in snow. A glacier is visible in a valley between the mountains, flowing towards a body of water peppered with chunks of ice. The water is a mix of murky brown and icy blue, suggesting it is glacial runoff. The foreground is a contrast of vibrant green vegetation, displaying a dense forest at the bottom. The sky above is partly cloudy. The photo captures the natural beauty and ruggedness of the terrain.The image captures an aerial view of a vast glacial landscape. The foreground shows a rugged, uneven expanse of gray and white ice with visible crevasses, characteristic of a glacier. To the left, a wing of the aircraft is partially visible, indicating the perspective of the photo. Beyond the glacier, steep, rocky mountains rise dramatically, their surfaces marked with patches of green vegetation and some snow at the peaks. In the background, another glacier winds through a valley, bordered by more mountainous terrain. The sky is mostly clear, allowing sunlight to illuminate the scene.
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Dr. Brendan Anderson @fossilsndcoffee.bsky.social · 17/06/2025
For Day50 of photoshopping @lastweektonight.com's John Oliver with fossils in the hopes that he saves the Paleontological Research Institution Celebrating 90yrs of mollusk research at PRI! John is joined by a number of other H. sapiens who love science (and fun)-tag them all! 🧪🦑⚒️🐌 #fossils #savePRI
A case showing mollusk research at PRI including the logo, Ecphora, Turritellids, oysters, clams, and turrids. Text explains that PRI is one of the most important fossil collections in the US, especially for mollusks with well over 1 million mollusk specimens and 7 million total specimens in collections.
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David Clark @clarkeocrinus.bsky.social · 18/04/2025
I sometimes take advantage of the analytical equipment at my real job. This is a Cambrian arthropod (probably not a Beckwithia) from the Wheeler shale of Utah. I used the XRF (X-ray fluorescence) to highlight iron and phosphorus. This is a 500 Ma digestive system. #FossilFriday
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Dr. Lynne Elkins @ljelkins.bsky.social · 16/04/2025
I am pleased to announce that my department (EAS at Nebraska) is hiring a teaching postdoc for AY 2025-2026 in the area of Earth Materials! I'm not on the committee but am spreading the word to my mineralogy/petrology networks on behalf of the committee. See ad for more details.
employment.unl.edu
Postdoctoral Teaching Associate
The Department of Earth and Atmospheric Sciences (https://eas.unl.edu) at the University of Nebraska-Lincoln (UNL) has an opening for a Postdoctoral Teaching Associate in Earth Sciences. We are seekin...
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Jeff Greene @jeffgreene.bsky.social · 29/03/2025
Unsurprisingly, @tressiemcphd.bsky.social is spot-on in this analysis: “A.I.’s most revolutionary potential is helping experts apply their expertise better and faster. But for that to work, there has to be experts.” www.nytimes.com/2025/03/29/o...
nytimes.com
Opinion | Actually, A.I. Is Pretty Mid (Gift Article)
A.I. is just what we need in the post-fact era: less research and more predicting what we want to hear.
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Alistair Hamill @ahamill.bsky.social · 29/03/2025
1/ An ongoing thread on the devastating M7.7 Mandalay (Myanmar) earthquake, 28 March 2025. This GIS map is from USGS Pager. #geographyteacher
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Sarah Hörst @planetdr.bsky.social · 19/03/2025
We are assuming this was a planetary scientist traveling to the Lunar and Planetary Science Conference
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Ke Gao I 高珂 @goco.bsky.social · 14/03/2025
Who’s guilty of the discrepancy between minerals and whole-rock chemistry in plutons? Melt extraction might be innocent—mineral reequilibration is likely the real culprit! Fresh out on Pi Day by me, Brenhin @brenhinkeller.bsky.social, & Changqian! doi.org/10.1029/2024...
doi.org
Amphibole Compositions Record Cold Post‐Emplacement Reequilibration in Plutons
Melts predicted from mineral compositions in arc plutonic rocks do not match bulk compositions, a discrepancy absent in volcanic rocks Neither bulk crystallization nor melt extraction can fully e...
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Scott Dance @byscottdance.com · 14/03/2025
New: A NOAA lab in Hawaii that is connected to the longest-running observation of global greenhouse gas concentrations is slated for closure in August, according to a list of lease terminations Democratic members of Congress shared with @washingtonpost.com.
washingtonpost.com
Trump moves to close government lab that tracks planet-warming pollution
The lab is connected to the Mauna Loa Observatory, where scientists gather data to produce the Keeling Curve, a chart on the daily status of atmospheric carbon dioxide concentrations.
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Bernat Font @fontb.bsky.social · 12/03/2025
Playing a bit with our WaterLily.jl #CFD #JuliaLang solver and homogeneous isotropic decaying turbulence 🌀 128^3 grid running on my local #GPU ⚡ visualizing in real-time with @makie.org github.com/WaterLily-jl...
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Tidier.jl @tidierjl.bsky.social · 09/02/2025
Coming soon to TidierFiles.jl for #JuliaLang: reading Google sheets as DataFrames.
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Carl Zimmer @carlzimmer.com · 30/01/2025
National Science Foundation suspends salary payments, leaving researchers unable to pay their bills www.statnews.com/2025/01/30/t... Story by @ericboodman.bsky.social
statnews.com
National Science Foundation suspends salary payments, leaving researchers unable to pay their bills
An NSF online payment system remained down after the federal funding freeze was lifted, leaving early-career scientists scrambling to pay bills
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Adrian Hill @adrianhill.de · 30/01/2025
You think Jacobian and Hessian matrices are prohibitively expensive to compute on your problem? Our latest preprint with @gdalle.bsky.social might change your mind! arxiv.org/abs/2501.17737 🧵1/8
Figure comparing automatic differentiation (AD) and automatic sparse differentiation (ASD).

(a) Given a function f, AD backends return a function computing vector-Jacobian products (VJPs). (b) Standard AD computes Jacobians row-by-row by evaluating VJPs with all standard basis vectors. (c) ASD reduces the number of VJP evaluations by first detecting a sparsity pattern of non-zero values, coloring orthogonal rows in the pattern and simultaneously evaluating VJPs of orthogonal rows. The concepts shown in this figure directly translate to forward-mode, which computes Jacobians column-by-column instead of row-by-row.
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Tao Wen 文涛 @jaywen.bsky.social · 23/01/2025
Nominations for the M. Lee Allison Award for excellence in Geoinformatics are open. This award is granted annually by GSA Geoinformatics and Data Science Division. Review of nominations will begin on March 1st, 2025. Please spread the word! Here is the nomination form: forms.office.com/r/CEBjb4kWZk
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Dr. Kenna Harmony Rubin @kennarubin.bsky.social · 14/02/2024
Fresh & dense picrite, fresh aphyric 'a'a, basalts with infilled vesicles, and basalts with sharp flow contacts. just a few of the #hawaiian lavas cored well below modern sea level on #IODP #exp389 are showing a surprising range of #volcanic textures... all in the first site we've examined thus far.
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Brenhin Keller @brenhinkeller.bsky.social · 24/01/2025
For any earth science grad students looking for a postdoc next year! ⚒️🧪
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Advances in Geochemistry and Cosmochemistry @weareagc.bsky.social · 20/01/2025
Here we are, AGC is open for submission! Find us here: agcj.org #DiamondOpenAccess #AGC
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Kevin Bonham @kevinbonham.com · 17/01/2025
Very excited to announce that the Bonham Lab will be starting next month at Tufts (TMC GI division)! I'll be recruiting at multiple levels - if you are interested in the intersection between computing and medicine, esp multi-'omics, microbio and immuno, reach out! #academicsky 🧪🧫🦠
tuftsmedicine.org
Department of Medicine | Tufts Medicine
Access comprehensive care at Tufts Medical Center's Department of Medicine. Our experts provide personalized treatment for a range of conditions.
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Dr. Judith Hubbard @judithgeology.bsky.social · 14/01/2025
ithacavoice.org/2025/01/muse... 🧪⚒️ I'm dismayed to see the news that the Museum of the Earth may have to close its doors! If you or your organization can help support the museum, please reach out to them. Or maybe just buy these amazing trilobite slippers from their gift shop:
pri-gift-shop.myshopify.com
Trilobite Slippers (Greenops)
Greenops boothiDevonian trilobite Trilobites crawled along the bottom of shallow seas for around 300 million years, from the beginning of the Cambrian Period to the end of the Permian Period. The name...
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JuliaHub @juliahub.bsky.social · 07/01/2025
Discover new ways to compile Julia! Smaller binaries, AOT compilation with 'juliac,' and trimming tools for efficient deployment. juliahub.com/blog/new-way... #JuliaLang #JuliaCon #SoftwareDevelopment #Optimization
juliahub.com
New Ways to Compile Julia
Discover new ways to compile Julia for smaller binaries and efficient code deployment with advancements in trimming and AOT compilation.
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Nick Scroxton @stalagnick.bsky.social · 19/12/2024
📢New Paper📢 In our opinion piece "The Hunt for Holocene Abrupt Climate Change" in #PLOSClimate, Nick McKay and myself ask why are ACCs found easily in individual studies but not in compilations? doi.org/10.1371/jour...
An artistic snowy mountainous landscape of blues and whites with far off lands of oranges and and orange sun. Lots of angular lines and clouds. A group of people chart and explore the landscape at the front. Made by AI.
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Luca Malatesta @geoluca.bsky.social · 22/12/2024
This was a great #AGU24 presentation by Joel Wilner! Great timing.
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Brenhin Keller @brenhinkeller.bsky.social · 22/12/2024
New paper on glacial erosion rates and the Sadler effect that came out of a @dartmouthears.bsky.social grad seminar class just out now in Sci Adv! doi.org/10.1126/scia...
doi.org
Limits to timescale dependence in erosion rates: Quantifying glacial and fluvial erosion across timescales
Globally, glacial erosion rates outpace fluvial, with limits to the biases introduced by measuring across different timescales.
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Dr. Jennifer Wade @volcanojw.bsky.social · 16/12/2024
Geoscience folks, have you seen all our skeets about how NSF/EAR has reorganized? Now there's a one-stop-shop for all the info: new.nsf.gov/geo/updates/... (note the webinars happening this week! come ask your questions!)
new.nsf.gov
Realigning the NSF Division of Earth Sciences
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John Garver @geogarver.bsky.social · 19/12/2024
Fluid inclusions in this Cambrian quartzite are just amazing. These CO2 and O2 bubbles vibrate, endlessly. These are likely from a widespread late Paleozoic fluid event (same as Herkimer diamonds?). Inclusions are 20-30 microns: ~1/3 the width of human hair. (Mosherville SS of Galway in NY).
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Andrew Selbst @aselbst.bsky.social · 14/12/2024
We wrote this about predictive AI rather than generative AI, but the hype-functionally ratio has only blown up in the genAI era. Something’s gotta give.
dl.acm.org
The Fallacy of AI Functionality
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James Darling @darlingplanets.bsky.social · 07/12/2024
Apollo 14 basaltic impact melt sample 14310 #thinsection We have two fully-funded PhD projects available to work on impact melt processes. Please do share with students looking for planetary geology opportunities 😀🌍🌑⚒️ www.port.ac.uk/study/postgr... www.trees-dla.ac.uk/projects/ign...
Thin section image of a lunar basaltic impact melt
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Diego González @geodgonzalez.bsky.social · 28/11/2024
Today is #ThinSectionThursday, so I'll repost an old one from the other site. Andradite #garnet (Melanite) phenocryst, surrounded by aegirine, in an Haüyne-rich foidite from Perler Kopf, #Eifel #volcanic field #Germany ⚒️
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Sascha Zertani @sheared-sash.bsky.social · 29/11/2024
This is a map showing the orientation of diopside in a deformed symplectite. This used to be an omphacite, which tells us that the rock used to be at very high pressure (great depth). ⚒️🧪 If you want to read more about how such symplectites nucleate and deform: link.springer.com/article/10.1...
Orientation map (IPFZ) of diopside that formed from the breakdown of omphacite, a high pressure mineral.
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Julia Language @julialang.org · 25/11/2024
Hello @bsky.app from the #JuliaLang community! We're excited to start posting here on Bluesky in addition to our other social media, all of which can be found here: julialang.org We'll keep you updated on our fantastic community, our conferences, #JuliaLang updates, and more on this profile!
Julia REPL which activates the Bluesky project, and calls a function which simulates creating a new post on the julialanguage Bluesky account!
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Richard Gibson @richardgibson.bsky.social · 22/11/2024
My contribution to #FridayFold #geology ⚒️- not a tectonic fold, but a flow-fold in the Eocene (53-49 Ma) Lowland Creek Volcanics in Montana USA.
Overturned fold in layered volcanic rocks, with bicycle to show the outcrop is about 5 meters high.
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Chris Rackauckas @chrisrackauckas.bsky.social · 18/11/2024
New Episode of the #julialang Dispatch Podcast! Here we talk with Jeff Bezanson, one of the creators of the Julia Programming Language, on topics such as static compilation of Julia programs, ahead-of-time compilation of binaries, and more! www.youtube.com/watch?v=4CV5...
youtube.com
Static Compilation of Julia with Jeff Bezanson
YouTube video by Julia Dispatch
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Yifan Yin @quakyifan.bsky.social · 25/10/2024
I went to a summer school in Corsica about earthquake and faulting. But will you look at this dyke. #geology
A dyke intrusion into the host rock seen on a rocky seashore in Corsica, France.
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Will Ratcliff @wcratcliff.bsky.social · 26/10/2024
New preprint up! We sequenced hundreds of samples from across one of Earth's oldest living organisms - the Pando aspen clone - to understand how mutations accumulate and spread in long-lived clonal organisms. Our results were…surprising. 1/30
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Vicky Veritas @vickyveritas.bsky.social · 23/10/2024
Magmatic enclaves are typically mafic (darker) inclusions w/in felsic (lighter) igneous rock caused by mingling of magmas in the magma chamber. This swarm looks like fishes swimming with current & have experienced some shearing. Note the lighter dikes cutting across some of the enclaves. ⚒️🧪👇🏼 geology
Mafic magmatic enclaves (dark S-shaped blobs) swarm parallel to the dominant foliation in the lighter granodiorite. The enclaves are cut by lighter linear dikes. Photo from: https://users.monash.edu.au/~weinberg/Pages/Serrapilheira_2018/Pluton_growth.htm
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Rebecca Bratspies, Author @rbratspies.bsky.social · 24/10/2024
PSA: you can get rid of all the AI sh*t in your google search. All you have to do is add "udm=14" to the search URL. Here is an article about how to do it, with links to detailed instructions to change your search default based on your OS tedium.co/2024/05/17/g...
tedium.co
How I Made Google’s “Web” View My Default Search
Forget AI. Google just created a version of its search engine free of the extra junk it has added over the past decade-plus. You just need one URL parameter.
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Brandon ❄️ @bdglaciers.bsky.social · 22/10/2024
Share this far and wide! The more people know about this feed (glaciologists) the better the experience will be: bsky.app/profile/did:...
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Hannah Who @notablyuncool.bsky.social · 23/10/2024
Baklava when abound ground vs baklava being called bakmagma when below ground
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