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Thomas A Caswell

@tacaswell.bsky.social
149 followers 187 following 16 posts

I am a soft-condensed matter physicist by training, but am now Research Software Engineer working to enable scientist to use computers to do science via open source software. Project Lead of Matplotlib and PSF Fellow he/him

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Reposted by Thomas A Caswell
thethinblackduke.bsky.social @thethinblackduke.bsky.social · 29/09/2026
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Leah McElrath @leahmcelrath.bsky.social · 24/09/2026
AP Stylebook warns against anthropomorphizing AI systems: “Avoid language that gives them human characteristics… Instead, explain what a system does, how well it performs, who built it and who could be affected by it.”
APStylebook @APStylebook
X.com
Artificial intelligence systems do not think, feel, want or understand. Avoid language that gives them human characteristics. This is called anthropomorphizing, when we ascribe human traits, emotions or behaviors to non-human things, such as animals or inanimate objects.
Instead, explain what a system does, how well it performs, who built it and who could be affected by it.
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Adam Becker @adambecker.bsky.social · 17/09/2026
Just absolutely wild to see so many people discovering the massive influence of the rationalists in real time and say things like "I wish I could unlearn what I've learned in the last 24 hours." I, and others, have been researching these people for YEARS. There is so much I wish I could unlearn.
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WIRED @wired.com · 21/09/2026
WIRED asked 634 women what they really think about working in tech. They told us about harassment, bias, unequal treatment, and the everyday indignities that still shape life in the industry. 🔗 www.wired.com/story/women-...
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David Ho @davidho.bsky.social · 15/09/2026
NSF has reduced the research budget for all atmospheric, ocean, and earth sciences by ~80%. 80%! A lot of us will not be conducting new research or training new students for the foreseeable future.
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Amy Spitalnick @amyspitalnick.bsky.social · 10/09/2026
The right-wing calls for the **NYC Mayor** to skip the 9/11 memorial are nothing more than a transparent attempt to exploit pain and fear to normalize Islamophobia and hate. There is no world in which this would even happen if Mamdani weren’t Muslim — which tells you everything you need to know.
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derek guy @dieworkwear.bsky.social · 06/09/2026
this is the kind of design costume designers make to tell you who are the bad guys in a space movie
Donald Trump posts an image on his Truth Social account. It shows a new uniform for US Space Force members, comprising of an all-black outfit with knee-high black leather boots, black cap, and minimalist looking suit.
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Brad Lander @bradlander.bsky.social · 06/09/2026
Expanding federal child-care subsidies so that more families would have a range of options — in schools, child-care centers, family day care networks, or for a parent to stay at home — is a popular, broadly-shared vision that could help address the affordability crisis and unite our divided country.
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 06/09/2026
It’s true that I’m pushing the agenda of empowering students with the notion that their minds are worth their time
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Abigail Fraeman @abbyfrae.bsky.social · 03/09/2026
Sharing a terrific article by project scientist Ashwin Vasavada describing a day in the life of Curiosity Mars rover science operations. theconversation.com/mars-rovers-...
theconversation.com
Mars rovers give scientists a ground-level view of the red planet – peek inside their NASA control room
Each day in the control room of the Curiosity rover is jam-packed with important scientific decisions, as a NASA project scientist describes.
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Alerts from NWS New York NY (UNOFFICIAL) @okx.nws-bot.us · 20/08/2026
🚨 Tornado Warning issued August 20 at 6:44PM EDT until August 20 at 7:15PM EDT by NWS Upton NY 🚨 Additional Details Here.
TOROKX

The National Weather Service in Upton NY has issued a

* Tornado Warning for...
Queens County in southeastern New York...
Southwestern Nassau County in southeastern New York...

* Until 715 PM EDT.

* At 644 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Rockaway Beach, moving northeast at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur.  Tree
damage is likely.

* This dangerous storm will be near...
Cedarhurst around 650 PM EDT.
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Julian Sanchez @normative.bsky.social · 20/08/2026
Most transphobia, or so it seems to me, is about wanting culturally contingent hierarchies and identity scripts to be Inscribed in Nature in some deep way that obviates the need for reflective examination, and getting very anxious and angry about anything that makes it clear that’s a fantasy.
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Mary Dudziak @marydudziak.bsky.social · 18/08/2026
Beginning my research seminar, as always, with Lynn Hunt's essay How Writing Leads to Thinking (and Not the Other Way Around). Should be mandatory reading in light of the impact of AI. www.historians.org/perspectives...
Writing is stressful. Sitting in my computer chair my neck and shoulder muscles almost immediately tense up as I dig around in my brain for the best phrase or even any coherent string of words, whether I am writing an essay like this one, a book chapter, a letter of recommendation, or an email message to a friend. Writing is time-consuming. It’s a great way to pass the time on a long airplane flight because you lose track of the passage of time altogether. It’s even better, from that point of view exclusively, than watching an episode of Mad Men on your laptop. Writing means many different things to me but one thing it is not: writing is not the transcription of thoughts already consciously present in my mind. Writing is a magical and mysterious process that makes it possible to think differently.
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Thomas Marrone @thomasthecat.bsky.social · 19/08/2026
The Official Babylon 5 YouTube Channel (yes, there is one!) has started posting full episodes of B5, starting with the Pilot, called "The Gathering." If you haven't seen B5, go check it out. Premiering in 1994, B5 was a prototype for today's Prestige TV formula. www.youtube.com/watch?v=pGVW...
youtube.com
The Gathering (Pilot) | Babylon 5 FULL EPISODE
YouTube video by Babylon 5
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Aaron Huertas @aaronhuertas.bsky.social · 18/08/2026
We have a major Democratic law firm, two major party committees, and two media outlets dead to rights suppressing research into how digital fundraising firms scam seniors and barely a peep from the national press corps or elected officials. A goddamn shame.
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Dr. Lucky Tran @luckytran.com · 10/08/2026
Important: Trump’s executive order is NOT legislation. Though the executive order promotes more misinformation about vaccines, nothing has changed about the availability of childhood vaccines. For evidence-based guidance, please follow and share American Academy of Pediatrics recommendations.
AAP Recommended Immunization Schedule
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Brett Cannon @snarky.ca · 10/08/2026
If you want to run or give supporting nominations to anyone else who's running (yes, that includes me), www.python.org/nominations/... is taking nominations until August 11, 14:00 UTC.
python.org
Welcome to Python.org
The official home of the Python Programming Language
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Elizabeth Nolan Brown @enbrown.bsky.social · 06/08/2026
My 4-year/old just learned about the concept of infinity and is now throwing a tantrum over it. “It’s weird! I don’t like it. I just want numbers to stop!”
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Sophie Labelle @assignedmale.bsky.social · 31/07/2026
A dark day for human rights.
four frame comic. first frame shows the logo of amnesty international. second frame shows jk rowling, smiling in the dark. third frame shows an empty classroom, with a pride poster almost falling from the wall. fourth frame shows a trans flag flying in the wind. text above all the images reads : 
on july 8th, amnesty Inter-
national uk published a report
titled “A Growing Threat: The
Anti-Rights Movement in the UK.”
it listed 117 orgs, including anti-
trans and anti-queer ones
backed by jk rowling.
the backlash was immediate
and brutal : rowling pledged
to cover the fees of anyone
who wished to sue amnesty.
the report was taken down
within 48 hours.
this morning (july 31st), amnesty
fully capitulated and released
an apology to anti-trans orgs,
which, it said, should not have
been "collectively labelled as
anti-rights". rowling
celebrated.
an organisation that
bravely faced fascist regimes
and reported human rights
violations for 65 years has caved
to rowling's power and bigotry.
it's a dark day for human rights.
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Anil Dash @anildash.com · 27/07/2026
Just in case you still use any Basecamp products, DHH is crashing out about his AI product gently pointing out that it’s bad for him to have extermination fantasies about the Roma people.
DHH tweet saying “This is why we need competition and open weights in Al. Imagine a world where only Anthropic sat as the moral arbiter of acceptable speech. Fucking ridiculous. (Grok of course did it no problem, same too with Kimi K).” when presented with his blog post using a slur about the Roma people.
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Caitlin Rivers @cmyeaton.bsky.social · 28/07/2026
I joined PBS News Hour to discuss cyclosporiasis, salmonella, and measles. Outbreaks abound. x.com/NewsHour/sta...
x.com
PBS News (@NewsHour) on X
Public health concerns are growing as cyclosporiasis cases surge, and now a salmonella outbreak across 17 states has many Americans raising concerns about U.S. food safety. For more, @WmBrangham spea...
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SciPy Conference 2026 @scipyconf.bsky.social · 19/07/2026
The Sprints are one of our favorite parts of the conference! 🎉 This is where many of us made our very first contribution to the Scientific Python ecosystem, thanks to the welcoming and friendly maintainers who make it easy to get involved. 🫶 Here's to all the new contributors started this week 💙
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Cathy🟧 @kitterlecathy.bsky.social · 04/07/2026
In case you haven't seen this today.
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Greg Pak @gregpak.net · 05/07/2026
The promise* that everyone belongs. No matter who you are, where you come from. You belong. * miserably broken right now
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Matt Gabriele @profgabriele.com · 04/07/2026
And again remember how Douglass ends his speech, with hope - a call to see the forces working to make America fulfill its heretofore broken promises God speed the year of Jubilee daily.jstor.org/what-to-the-...
Allow me to say, in conclusion, notwithstanding the dark picture I have this day presented, of the state of the nation, I do not despair of this country. There are forces in operation, which must inevitably, work the downfall of slavery. " The arm of the Lord is not shortened," and the doom of slavery is certain.I, therefore, leave off where I began, with hope. While drawing encouragement from "the Declaration of Independence," the great principles it contains, and the genius of American Institutions, my spirit is also cheered by the obvious tendencies of the age.
Nations do not now stand in the same relation to each other that they did ages ago. No nation can now shut itself up, from the surrounding world, and trot round in the same old path of its fathers without interference. The time was when such could be done. Long
established customs of hurtful character could formerly fence themselves in, and do their evil work with social impunity. Knowledge was then confined and enjoyed by the privileged few, and the multitudethe multitude walked on in mental darkness. But a
change has now come over the affairs of mankind. Walled cities and empires have become unfashionable. The arm of commerce has borne away the gates of the strong city. Intelligence is penetrating the darkest corners of the globe. It makes its pathway over and under the sea, as well as on the earth.
Wind, steam, and lightning are its chartered agents. Oceans no longer divide, but link nations together. From Boston to London is now a holiday
excursion. Space is comparatively annihilated.—Thoughts expressed on one side of the Atlantic, are distinctly heard on the other.The far off and almost fabulous Pacific
rolls in grandeur at our feet. The Celestial Empire, the mystery of ages, is being solved. The fiat of the Almighty, "Let there be Light," has not yet spent its force. No abuse, no outrage whether in taste, sport or avarice, can now hide itself from the all-pervading light. The iron shoe, and crippled foot of China must be seen, in contrast with nature. Afric must rise
and put on her yet unwoven garment.
"Ethiopia shall stretch out her hand unto God." In the fervent aspirations of William Lloyd Garrison, I say, and let every heart join in saying it:
God speed the year of jubilee
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Elizabeth Warren @warren.senate.gov · 03/07/2026
This July 4th, families are drowning in higher prices at grocery checkout. But Trump “loves the inflation” — and has no plan to lower your costs.
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John Dennehy @drjdennehy.bsky.social · 22/06/2026
American science is being destroyed. Worst funding year in generations. grant-witness.us/posts/2026-0...
grant-witness.us
The NSF is on Track for its Worst Year in Generations – Grant Witness
Throttling of science funding is utterly unprecedented and radical when compared to the past 50 years.
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SciPy Conference 2026 @scipyconf.bsky.social · 21/06/2026
🧩 Talk Spotlight: @hadley.nz shares 20 years of tidyverse lessons; data grammar that shaped how we think about wrangling. Plus, his take on AI's impact on future data science workflows 🚀 #SciPy2026 🔗 scipy2026.scipy.org
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Charity Majors @charity.wtf · 21/06/2026
I get asked to read and blurb a lot of books. It's always an honor to be asked -- writing a book is a TON of work -- but I almost never do. If I wouldn't chase you down on the street and urge you to read a book, it feels wrong to blurb it. I would chase you down to read this. My blurb is true.
drcathicks.com
Dr. Cat Hicks
Leading the science of software success
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SciPy Conference 2026 @scipyconf.bsky.social · 17/06/2026
📖 Talk Spotlight: Ever wonder why README files exist? @dbouquin.bsky.social traces their surprisingly human history from 1970s punch cards to today's code culture. Why a file called "Read Me" matters more than you think 🐰 #SciPy2026 🔗 scipy2026.scipy.org
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SciPy Conference 2026 @scipyconf.bsky.social · 16/06/2026
🎓 Talk Spotlight: Michael shows how Python in the browser opens doors for science education. SymPy, Pyodide, free hosting; suddenly calculus comes alive in class. EngineeringPaper.xyz proves it works 🌐 #SciPy2026 🔗 scipy2026.scipy.org
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Mayor Zohran Kwame Mamdani @mayor.nyc.gov · 10/06/2026
MSG requested a permit for a watch party for 500-999 fans. We approved that permit for 999 fans.

Mr. Dolan has now decided to cancel the watch party.

I know this is breaking hearts across our city.

But if there's one thing Knicks fans don't need permission for, it's showing up for our team wherever we may be — no matter the block or the borough. 

Knicks in five.
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SciPy Conference 2026 @scipyconf.bsky.social · 10/06/2026
📣 Meet our first keynote 🥁🥁 🚀 Thomas Caswell: Project Lead for Matplotlib & staff scientist at Brookhaven National Lab. 15+ years of scientific Python: from a 1-character patch to leading one of its most-used libraries 📊 Don't miss him at #SciPy2026 🔗 scipy2026.scipy.org
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Nicholdav @nicholdav.bsky.social · 10/06/2026
Looking forward to @tacaswell.bsky.social's keynote, I'm sure we'll learn a lot about @matplotlib.org and that staff scientist life
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James Talarico @jamestalarico.bsky.social · 04/06/2026
There’s been a lot of talk in this race about what makes a "real man." A man does what’s right when no one is watching. He upholds his commitments to his family and neighbors. He doesn’t lie, cheat, & steal his way through life. Real men serve others. Weak men serve themselves.
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404 Media @404media.co · 01/06/2026
Five teen girls were targeted by AI-generated child sexual abuse material at a Pennsylvania high school. What happened next shows how unprepared schools and police are with AI CSAM material. www.404media.co/radnor-high-...
404media.co
How Deepfakes Tore a High School Apart
After five teen girls were targeted by AI-generated child sexual abuse material, Radnor Township High School in Pennsylvania has become a case study in how schools and police around the country…
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@CoffeeShopRabbi.com @rruth.bsky.social · 01/06/2026
Corruption: stealing dollars from the National Parks to fun Trump's vanity projects. U.S. Government Gives Zion National Park Toilets The Cold Shoulder And Uses Entrance Fees To Fund D.C. Renovations www.thetravel.com/us-governmen...
thetravel.com
U.S. Government Gives Zion National Park Toilets The Cold Shoulder And Uses Entrance Fees To Fund D.C. Renovations
Zion National Park's ongoing toilet issues remain on hold while D.C. seeks more "beautification" funding.
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Rep. Mike Levin @levin.house.gov · 30/05/2026
There is no world in which this is okay.     Supreme Court Justice Samuel Alito did not recuse himself from cases involving Trump’s Treasury Department while his own son was secretly working there as a political appointee and attorney. 🧵
notus.org
Samuel Alito’s Son Has Been Quietly Working for Trump’s Treasury Department
Philip Alito has been working as an attorney with the Treasury’s office of the general counsel for months even as the Supreme Court takes up cases involving the department.
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Dan Garisto @dangaristo.bsky.social · 27/05/2026
Scoop: NSF has been quietly blocking new funds and grants to four top universities: Duke, Harvard, Princeton, and Yale. Dozens of proposals from PIs at these universities—and their collaborators—have been stuck at the Office of Award Management awaiting finalization for months.
nature.com
Exclusive: NSF puts new research grants to top universities on hold
US science funder once again restricts awards to Harvard University and other research institutions.
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Erin Kissane @kissane.myatproto.social · 24/05/2026
the thing about “put everyone together in an echoing brightly lit room with instant search that encourages everyone to post in oral-culture mode but judge each other by the standards of text-culture mode” is that deranged structures produce deranged behavior
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Ryan Evans @ryanevans.bsky.social · 24/05/2026
All the turpitudinous hacks, brutish warmongers, well-fed chickenhawks & oily compradors who’ve spent their careers pushing for war w/ Iran & brought us to this ghastly wreck are already blaming everyone but themselves. Don't know what happens next but remember who built this coffin plank by plank
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rejemy.bsky.social @rejemy.bsky.social · 30/04/2026
Not-so-fun fact, Schrodinger would have loved Epstein's island en.wikipedia.org/wiki/Erwin_S...
en.wikipedia.org
Erwin Schrödinger - Wikipedia
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Adam Becker @adambecker.bsky.social · 09/05/2026
nobody, absolutely no one at all: libertarians: 🎶 everything's better down where it's wetter take it from meeeeeee🎶
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Laura Jedeed @laurajedeed.bsky.social · 17/05/2026
Your tax dollars paid for this event freedom250.org/celebration/...
A button that reads: TPUSA. Wives submit, husbands love, children obey, Colossians 3:18-19
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Ryan May @dopplershift.bsky.social · 17/05/2026
The fact that there are academics arguing this (holding people accountable for all content in a publication you signed onto) is unfair or too hard is mind-boggling.
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dan sinker @dansinker.com · 12/05/2026
The Confederacy rises again.
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Brian Beutler @brianbeutler.bsky.social · 12/05/2026
Yep. This is the best way to understand the events of the past couple weeks. They have to dispense with the artifice of principle, because the risks of Dems winning and coming to power bent on accountability are simply too great. www.offmessage.net/p/republican...
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Gil Durán @gilduran.com · 03/05/2026
It's official! I'm *permanently* banned from X for tweeting "TLDR: Fascism." (appeal denied) What an honor—and a sign that the Silicon Valley billionaires feel threatened by my book. (One of my final viral posts featured this cover.) Pre-order here! www.simonandschuster.com/books/The-Ne...
Cover for Gil Duran's forthcoming book, "The Nerd Reich: Silicon Valley Fascism and the War On Democracy." Red background with computer circuitry, words in black and white letters.
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Rainesford Stauffer @rainesford.bsky.social · 21/04/2026
Going to keep sharing this, because something I heard from sources is many felt like, after SNAP paused for the first time ever over the fall when the Trump admin refused to fund benefits, lots of people were talking about it. Now, people are still struggling but it feels like attention moved on.
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