iiinova — where your digital self keeps evolving

Shaun Hotchkiss @justshaun.bsky.social · 21/09/2026

I'm such a rookie. Here's the registration link, by the way: cosmologyfromhome.com/registration/

Shaun Hotchkiss @justshaun.bsky.social · 21/09/2026

85 excellent reasons you should attend Cosmology from Home this year! cosmologyfromhome.com/2026-talks Discussions start tomorrow, talks (listed above) were released to participants last week.

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Shaun Hotchkiss @justshaun.bsky.social · 08/09/2026

"I don't see why they can't just combine Pantheon+ and DES-Dovekie and get even tighter dark energy constraints" Your wish is granted! Featuring Tamara Davis, Jason Lee & Ryan Camilleri youtu.be/KT-j65gRnOQ

youtu.be

Cosmology from Combining Pantheon+ and DES-Dovekie (Camilleri, Davis and Lee)

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 07/08/2026

Fascinated by recent evidence for evolving dark energy? But wondering what it all means for fundamental physics models? Cosmology Talks has you covered! Everything you need to know about single scalar field dark energy in 2026. (Carlos García-García & William Wolf) youtu.be/RbXqghcRv0U

youtu.be

Single Scalar Field Dark Energy: 2026 Status Report (García-García & Wolf)

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 29/07/2026

The latest Cosmology Talk! Low mass dark matter halos are to gravitational waves, as the atmosphere is to stars. And because of that, LISA might detect them! (lower than 10^4 M_sol 😲) Featuring Miguel Zumalacárregui, Juan Urrutia and Han Gil Choi youtu.be/a5lIDTDRo4c

youtu.be

Probing Low Mass Dark Matter Halos with LISA | Choi, Urrutia & Zumalacárregui

YouTube video by Cosmology Talks

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Swagat Saurav Mishra @primeval-arhsim.bsky.social · 12/06/2026

Hope you enjoy watching this latest release from 'Cosmology Talks' where Shaun & I discuss: What cosmological inference of evolving (including Phantom) Dark Energy Does & Does Not Imply - in the context of DESI BAO results and beyond. Based on my recent work on the arXiv.

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Shaun Hotchkiss @justshaun.bsky.social · 12/06/2026

Latest DESI (+CMB +SN) data got you spooked? Seeing ghosts and *phantoms*? Don't panic! @primeval-arhsim.bsky.social is here to reassure you: "No phantoms are needed by current observational cosmology" youtu.be/etp-uezMgdw

youtu.be

Phantom Dark Energy: What Cosmology Does and Does Not Imply (Swagat Mishra)

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 15/05/2026

Fear not, cosmology masses. Cosmology from Home 2026 exists! In fact, it will run 21 Sept – 2 Oct and "early" registration just opened :-) cosmologyfromhome.com/registration/

cosmologyfromhome.com

Registration – Cosmology from Home

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Centre for Logic and Philosophy of Science (CLPS) @clpskuleuven.bsky.social · 03/05/2026

Problems of uniform probabilities arise in contemporary cosmology. Head over to the conversation that Sylvia Wenmackers had with @justshaun.bsky.social about her recent paper on the issue! 💻👇 www.youtube.com/watch?v=MBeS... 📄 www.sciencedirect.com/science/arti... #philsci #philsky #physics #HPS

youtube.com

New Probability Axioms Could Fix Cosmology's Multiverse (Partially) - Sylvia Wenmackers

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 25/04/2026

It's the moment that everyone on Bluesky is endlessly refreshing their timeline hoping for: The talk release of a "from Home" conference! Our knowledge of the universe is expanding at an accelerating rate... and Dark Energy from Home 2026 Talks just dropped.

youtube.com

Eric Linder - Dark Energy Phenomenology

YouTube video by Research Talks (from Home)

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Shaun Hotchkiss @justshaun.bsky.social · 05/03/2026

Exciting! ........... Dark Energy from Home 2026 will be held from 21–24 April. Registration is now open: darkenergy.discussingresearch.com/registration Abstracts submitted by 24 March at 23:59 UTC will receive equal consideration. Later submissions will be reviewed at the organizers’ discretion.

darkenergy.discussingresearch.com

Registration – Dark Energy from Home

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Shaun Hotchkiss @justshaun.bsky.social · 03/03/2026

It's the day everyone on Bluesky looks forward to: The talk release day of a from Home conference! Early Universe from Home 2026 Talks just dropped. Check them out, there's lots of really interesting stuff going on.

youtube.com

Diederik Roest - Isocurvature modes during turns and their imprint on the CMB

YouTube video by Research Talks (from Home)

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Shaun Hotchkiss @justshaun.bsky.social · 11/02/2026

Discussions at Early Universe from Home kick off in just under two weeks, with talks released to participants in one week. Check out the updated list of speakers here: earlyuniverse.discussingresearch.com and register here: earlyuniverse.discussingresearch.com/registration/

earlyuniverse.discussingresearch.com

Early Universe from Home

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Shaun Hotchkiss @justshaun.bsky.social · 04/02/2026

"The evidence for dynamical dark energy relies too much on DESI's BAO, which is just one data set... " *Evidence for dynamical dark energy now seen with Dark Energy Survey BAO too* youtu.be/ukMQgHj6NMI

youtu.be

Dark Energy Survey - Combined cosmology from BAO + SN (+CMB) | Avila, Fernandez, Muir & Vincenzi)

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 27/01/2026

Can gravitational waves get gravitationally lensed? Yes! Have we observed any such events? Maybe!?😮😃 youtu.be/ZGqOpDTL8k4

youtu.be

A magnified and diffracted black hole merger (GW231123) | Miguel Zumalacarregui

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 11/11/2025

Want to know how to get at the non-linear cosmological scales to test modified gravity, using future large scale structure observations? Cosmology Talks has your back: youtu.be/nIdCpcObSVU

youtu.be

Cosmological Gravity on All Scales | Sankarshana Srinivasan

YouTube video by Cosmology Talks

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Sam Gregson @badboyofscience.bsky.social · 05/04/2025

Fantastic time discussing whether the latest blockbuster cosmology results really do show that Dark Energy is evolving! Brilliant explanations from @clairelamman.bsky.social , @tamarastro.bsky.social and @justshaun.bsky.social Check it out! Full talk: youtu.be/reNicLW2vpY?... 🧪⚛️

youtu.be

Is Dark Matter Evolving? Cosmologists Explain

YouTube video by Bad Boy of Science

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South Pole Telescope @sptelescope.bsky.social · 30/03/2025

Unfortunately it was pretty cloud during #Sunset this year at the South Pole, but our winterover Sim managed to catch this picture just before the weather got bad, with the moon over SPT! #southpole #Antarctica

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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 26/03/2025

🥳 It's paper day for the completed #ESO Kilo-Degree Survey. We end our journey with a consistent picture of #cosmology 😲 I've been co-leading KiDS for 12yrs & I'm so proud of what the team's achieved. If you're at the #Euclid meet, go to Angus Wright's talk @10am today!🔭 ℹ️: arxiv.org/pdf/2503.19441

$A two panel figure. The x-axis is omega_m, the fraction of matter in the Universe. The y-axis is S8 on the left and sigma_8 on the right. Both are measures of the 'clumpiness' of dark matter. The contours show that the KiDS data (two measurements using slightly different statistics, COSEBIs and Bandpowers) agree with the data from the Planck CMB survey.$

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Shaun Hotchkiss @justshaun.bsky.social · 25/03/2025

Rather appropriately, given this proliferation of "from Home" events, the next one to announce is: Multiverse from Home! I suspect discussion won't be hard to come by in this one 😅. multiverse.cosmodiscussion.com

multiverse.cosmodiscussion.com

Multiverse from Home

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Shaun Hotchkiss @justshaun.bsky.social · 25/03/2025

Another "from Home" conference has launched (complete with the *perfect* banner image)... *Tabletop Scale Cosmology* Register now to discuss, and hear about, how you don't need giant telescopes and colliders to learn about the cosmos! tabletop.cosmodiscussion.com

tabletop.cosmodiscussion.com

Tabletop Scale Cosmology

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Sesh Nadathur @seshnadathur.bsky.social · 20/03/2025

A nice blog post by Gillian Beltz-Mohrmann about the DESI "unblinding" event last year, the excitement and the reactions: www.desi.lbl.gov/2025/03/19/a...

desi.lbl.gov

At the Big Reveal: DESI’s December 2024 Unblinding Results

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Claire Lamman @clairelamman.bsky.social · 20/03/2025

DESI's DR2 BAO results are out!! TL;DR... 1/n @desisurvey.bsky.social

A blocky lambda symbol crumbles as it is pulled apart by creatures representing Baryon Acoustic Oscillations, the Cosmic Microwave Background, and supernovae. Caption reads "something has to give..." Credit: Claire Lamman

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Héctor Gil Marín @cosmonautico.bsky.social · 20/03/2025

🔊 New BAO analysis from the 3-year observations (DR2). Long story short, as follows. 1. DESI alone is consistent with LCDM. 👉 Boring 2. DESI and Planck have a 2.3 discrepancy in Ωm-H0rd plane. 👉Interesting.

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Shaun Hotchkiss @justshaun.bsky.social · 19/03/2025

I find this four parameter binned w(z) plot from DESI tantalising... the preference for w0,wa isn't coming from one isolated redshift.

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Shaun Hotchkiss @justshaun.bsky.social · 19/03/2025

No more new Cosmology Talks *today*, I promise!

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DESI Survey @desisurvey.bsky.social · 19/03/2025

JUST RELEASED: DESI DR1 & BAO RESULTS FROM DR2🌌

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Shaun Hotchkiss @justshaun.bsky.social · 19/03/2025

This is starting to look believable (to me at least 😅) *Something* is certainly going on... Great work @desisurvey.bsky.social! youtu.be/YiRaDtslycE

youtu.be

DESI 2025 - Cosmology Results from DR2 BAO (Garcia-Quintero & Martini)

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 19/03/2025

Can't get enough of @ec-euclid.bsky.social? Here are three "key science areas" the consortium identified from the results today and wanted to talk more about: - Active Galactic Nuclei - Galaxy Morphology - Strong Lensing youtu.be/YGqaxDH00Yw

youtu.be

Euclid 2025: AGN, Galaxy Morphology & Strong Lensing (Matamoro, Walmsley & Holloway)

YouTube video by Cosmology Talks

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Euclid Consortium @ec-euclid.bsky.social · 19/03/2025

For an explainer on #Euclid's background and what's in the Q1 data release, here's a conversation between Shaun Hotchkiss (@justshaun.bsky.social), Guada Canas-Herrera (gcanasherrera.com) from @esa.int, and our Herve Aussel (@herveaussel.bsky.social). www.youtube.com/watch?v=DVlK... #space 🔭

youtube.com

Euclid 2025: Science Goals and Q1 Data Summary (Cañas-Herrera & Aussel)

YouTube video by Cosmology Talks

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Euclid UK @eucliduk.bsky.social · 19/03/2025

With today’s #Q1Release, we get a preview of #ESAEuclid’s three Deep Fields: North, South and Fornax. 🤩 The location of the Deep Fields can be seen as the yellow patches on this all-sky view of ESA Gaia’s star map from its second data release in 2018, and ESA Planck’s dust map from 2014. (1/3)

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DESI Survey @desisurvey.bsky.social · 18/03/2025

🚨 BIG NEWS ALERT! 🚨 We’re just 24 HOURS AWAY from a MAJOR DESI release! 🌉🔭 Tomorrow at 3 PM PT, DESI is unveiling DR1, our first official Data Release—the largest dataset of its kind, packed with information on 18.7 million galaxies, quasars, and stars! But that’s not all…

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Mike Boylan-Kolchin @mbkplus.bsky.social · 18/03/2025

Some further context: cosmologists were anxiously awaiting updates on the Hubble tension. These results mostly close the window for something unexpected to have happened at early times that affects our estimates of the expansion rate of the Universe. 🧪

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Johannes R. Eskilt @johanres.bsky.social · 18/03/2025

Although #ACT DR6s headline is that LCDM is still king, they do find a 2.5 sigma of an unexplained polarization angle (aka cosmic birefringence)! I am amazed that people are not more excited by this! Their beta = 0.20 \pm 0.08 is very consistent with our Planck+WMAP results! arxiv.org/abs/2205.13962

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Shaun Hotchkiss @justshaun.bsky.social · 12/03/2025

"DESI's latest results, which will be revealed on March 19" 😲

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Shaun Hotchkiss @justshaun.bsky.social · 12/03/2025

Exciting times in cosmology... it's certainly curious that any combination of two probes from CMB, BAO and Supernovae, seems to favour evolving dark energy. With all three combined it's very strong, but it's still there with any two And now, with these DES results, one doesn't even need DESI's BAO.

arxiv.org

Dark Energy Survey: implications for cosmological expansion models from the final DES Baryon Acoustic Oscillation and Supernova data

The Dark Energy Survey (DES) recently released the final results of its two principal probes of the expansion history: Type Ia Supernovae (SNe) and Baryonic Acoustic Oscillations (BAO). In this paper,...

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Shaun Hotchkiss @justshaun.bsky.social · 10/03/2025

(This is not a formal announcement but...) Registration for @cosmofromhome this year is technically open (cosmologyfromhome.com/registration/) Bonus! If you register now you get to suggest plenary speakers/topics for us to invite😃. Formal announcements will come soon-ish O(weeks)...

cosmologyfromhome.com

Registration – Cosmology from Home

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Shaun Hotchkiss @justshaun.bsky.social · 25/02/2025

Early Universe from Home's live discussions are starting in about five hours. There are many wonderful talks already being watched and discussed asynchronously. You can satiate your fear of missing out by registering here... earlyuniverse.cosmodiscussion.com/registration/

earlyuniverse.cosmodiscussion.com

Registration – Early Universe from Home

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Shaun Hotchkiss @justshaun.bsky.social · 19/12/2024

Registration for *Early Universe from Home 2025* is now open! (running 25-28 Feb) It will be the best place to learn about and discuss... - correlators - phase transitions - topological defects - primordial black holes - and other early structures. earlyuniverse.cosmodiscussion.com

earlyuniverse.cosmodiscussion.com

Early Universe from Home

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Shaun Hotchkiss @justshaun.bsky.social · 11/12/2024

If you need a Christmas-iish Cosmology fix, all the (publicly available) talks from Parity Violation from Home are now live!

youtube.com

Parity Violation from Home 2024 - YouTube

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Héctor Gil Marín @cosmonautico.bsky.social · 21/11/2024

We are excited to present the new power spectrum Full-Shape results on DESI DR1 data @desisurvey. Check all the new papers at data.desi.lbl.gov/doc/papers/. A thread🧵👇

data.desi.lbl.gov

Papers - DESI Data

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Shaun Hotchkiss @justshaun.bsky.social · 18/11/2024

The talks have been released, asynchronous discussion is underway, and the live discussions will start on Tuesday. You can sign up to watch the talks and discussions, until the event ends on Friday: parity.cosmodiscussion.com/registration/ Some random expected highlights...

parity.cosmodiscussion.com

Registration – Parity Violation from Home

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Shaun Hotchkiss @justshaun.bsky.social · 13/11/2024

The latest Cosmology Talk! Daniele Sorini updating us on how many stars would form over a universe's history with different values of Λ. There's the usual cosmological upper limit on Λ, but he also sees a *lower* limit where smaller Λ leads to fewer stars because of *astrophysics*!! Whaat?!

youtu.be

How Dark Energy Affects Past and Future Star Formation - Daniele Sorini

YouTube video by Cosmology Talks

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Shaun Hotchkiss @justshaun.bsky.social · 23/10/2024

Is parity violated on cosmological scales in the universe? I don't know, but I do know where to go to find the latest expert opinions on the topic! Parity Violation from Home: parity.cosmodiscussion.com (The talk submission deadline is *technically* this Friday!!!)

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Shaun Hotchkiss @justshaun.bsky.social · 22/08/2024

What is this "JAGB" distance method that everyone is suddenly talking about? Look no further, Cosmology Talks has what you want... The latest talk, featuring JAGB expert, and lead author of the recent CCHP paper on the method, Abigail Lee youtu.be/mpSsmyInrEA

youtu.be

Extragalactic Distances from the J-region Asymptotic Giant Branch - Abby Lee (ft Freedman & Madore)

YouTube video by Cosmology Talks

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J R D M B @jrdmb.bsky.social · 17/08/2024

Timestamp links to key parts of this CCHP Cosmology Talk are now available - they're in the Comments section below the Description.

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