The 25th annual #SciPy2026 conference is only two weeks away! Join us in Minnesota or virtually for a plethora of scientific Python talks, including the Physics and Astronomy track 👀 see the full schedule at scipy2026.scipy.org/schedule You can sign up here 👉 ti.to/scipy/scipy2026

Conference photos are in! @perimeterinstitute.ca 🤩

Fresh on the @arxiv 💪 Check out how baryons and nonlinear galaxy bias (and scales) impact the 3x2pt analysis in the LSST scenario arxiv.org/abs/2606.10679

I’m doing science physics

Old pals catching up @marcobonici.bsky.social

I’ve been obsessed with Langewiesche’s writing since I discovered his @theatlantic.com articles. If someone had told me I’d be into a book about shipping and maritime stuff, man… He was such a master of narrative nonfiction that he can make any subject fascinating.

cloelib: A Flexible Python Library for Computing Cosmological Observables in the Euclid Era. Marco Bonici et. al. https://arxiv.org/abs/2605.23839

Over on Twitter a debate of medical doctor vs PhD and who is in the “right” is peeking its head again. I guess we have to have it at least once a year 😂 For me it’s always an excuse to pull this gem out Also: RIP Andre. What an actor he was. Pembleton forever! youtu.be/xYOK-2Q75wE?...

Ok I had to @arxiv.bsky.social

If someone told me 10 years ago that I’d be giving a talk at @scipyconf.bsky.social, I would’ve called them crazy. I’m incredibly honored that the SciPy organizers think derivkit is worthy of a talk! Thank you, SciPy team 🥹🥹🥹🥹

🚨🚨🚨 Only a few weeks left to apply for summer schools in physics (MSc / junior PhD): • Dark Universe - May 10 • Quantum Gravity & Quantum Chaos - May 10 • Scientific ML - May 15

Fresh on @arxiv 🥳🥳🥳🥳 Blinding in cosmology is especially challenging: unlike particle physics, our signal is statistical, subtle, and extracted through a long inference chain. Excited to share the official LSST DESC tool for blind analyses: arxiv.org/abs/2604.18111

@nikosarcevic.com on Modern Cosmology. Full episode on YouTube! youtube.com/shorts/idbCA...

How awesome is this?!

SBI Field Level Inference workshop at Perimeter this June Hurry up! events.perimeterinstitute.ca/event/1924/

Working on the problem from two completely different angles is the best part of this project we’ve been hammering for months Matthijs: pristine, elegant, mathematically flawless Niko: “okay but imagine the posterior is a traffic cone…” Somehow… we are both correct 🤣🤣

Apparently Matthew McConaughey was at Duke today and I missed meeting him because I was stuck in telecons/working from home This is NOT alright alright alright I’m really upset

Minor pet peeve: describing ΛCDM-based analyses as having the “potential to discover new physics.” They can reveal tensions or inconsistencies that may motivate extensions to the model — but that’s not the same as discovering new physics. Cmon my man, tone that down

Happy bday, arXiv! You are the best! Funny coincidence is that I chose to wear one of my arXiv shirts (which are top quality btw! Hoodies as well, highly recommend)

I am a science machine 💪💪💪💪 4th paper fresh on the @arxiv.bsky.social this year 🥳🥳🥳 arxiv.org/pdf/2603.09973

I was in a clusters telecon today (not my usual working group) and am so beyond impressed by the quality of plots people were showing. I find it so refreshing to see there are people out there who care about communicating their research

Impact and interplay of $Λ$CDM analysis choices for LSST cosmic shear. N. C. Robertson et. al. https://arxiv.org/abs/2602.21863

Starting the day shearing dead weeds in the forest and cutting through mountain mint — that sharp minty scent mixed with damp, rotting leaves — pure peace for the soul 🌿 And catching up with the wonderful folks over at @DukeLemurCenter is just 👌chefs kiss

Two more works on the @arxiv 🥳🥳🥳 arxiv.org/abs/2602.21863 arxiv.org/abs/2602.21280

Aaaaaand it’s officially on @arxiv.bsky.social 🥳🥳 arxiv.org/abs/2602.08078 Wanna do Fisher, XY Fisher or DALI with a chosen derivative method backend in a simple sleek Python way? Look no further, my friend. We got you! Simple examples here docs.derivkit.org/main/example...

Ok, aside that this was ten years ago (wthhhhell 😱) and I now feel ancient, it is actually nice to be reminded of good times during masters in Göttingen: Thorsten was my lecturer in cosmology and string theory courses and was super encouraging. Made me fall in love with cosmo 🤩

Actually — the first burek in the states since I moved 😱 Found the ingredients at Whole Foods Also a selfie just because

X marks the spot Happy first day of 2026! It’s cold here but nothing beats the Carolina blue 😍

There probably are a few things better than talking to Alan Heavens about a potential idea then heading to the woods and mulching sumac trees (for the lemurs!) with your best guy on a warm December morning but I can’t think of any right now. I just love the 🇺🇸 🍂🛻🪏

I swear if I hear another physicist say “we are not software engineers and we should not try to be” I’ll flip the freaking table. No, Dave, it exactly is our job. You need to know how to tell computer to do physics. And you are doing it in a very bad way. 1/

last day of classes! here's the collection of Jupyter notebooks illustrating stellar physics concepts I made for my grad Stars class this semester: zingale.github.io/stars/notebo... #astro

If you are around these parts, come and join us for a pint and a nice story about the Universe

🤣🤣🤣🤣🤣🤣

Happy Thanksgiving :) @desisurvey.bsky.social

Investigating the Dark Energy Constraint from Strongly Lensed AGN at LSST-Scale. Sydney Erickson et. al. https://arxiv.org/abs/2511.13669

I can say with full confidence I’m the happiest person on this planet right now. Seeing the Roman Space Telescope being assembled — and knowing it’ll be in orbit next year — just makes it unreal.

Hello again, DC 🤗

It’s a wrap! @nasaromantelescope.bsky.social NASA Roman HLIS Cosmology Project Infrastructure Team face to face meeting Thank you to Bhuv, Mike and the rest of UPenn folk for hosting us 🙏

Hey all I need help from my physics peeps (and beyond) Do you (or if you are a PI: your students/postdocs) use numerical derivatives in your research? Especially in inference (but also in general) Apparently I can’t do a poll here so pls respond and share

The only acceptable way to start the Leiden research visit is to have coffee with Dr Evil Villain (in our secret Narnia caffe) @ivovanvulpen.bsky.social (For those of you who don’t know, Ivo is responsible for the amazing wall formulas in Leiden; see photo 2 where Matthijs and I are kissing)

Happy to be back in one of the loveliest places on this planet 🇳🇱🚲🌷🧀🌊

Interested in a fully funded PhD place in Experimental Particle Physics in Edinburgh? We have fully funded studentships, including a specific scholarship for students from a Black heritage (including mixed Black background). More info: inspirehep.net/jobs/3080808

Statistical properties of the gravitational force through ordering statistics. Constantin Payerne et. al. https://arxiv.org/abs/2201.08478

One of the perks of academia — you have awesome colleagues all over the world so dinners in great company are always guaranteed

Lovely day at the Paris observatory with old Twitter friends! All Paris talks delivered!

When two stats nerds from way back randomly find themselves in Paris at the same time — talk about serendipity!!!! @knut.dundasmora.no 😍 It was beyond lovely to spend an afternoon in Paris with you

Bonjour!

Happy Halloween from me and my buggy code

A little treat for myself: two adorable mini Kurt Geiger bags ✨ My first one was a Heathrow purchase two years ago — guess it was the start of a collection 👀