Avi Mitrani
@avimitrani.bsky.social
Physicist, algorithm developer; this does not define me
Reposted by Avi Mitrani
Hmm. The best evidence that dark energy is evolving rather than constant just got a little weaker.
The statistical significance of observational results don’t really have “momentum,” but we’ll have to continue to wait and see about this one.
The statistical significance of observational results don’t really have “momentum,” but we’ll have to continue to wait and see about this one.
A little less than a year ago, a large team of cosmologists reported evidence that dark energy (which drives the acceleration of the expansion of the Universe) evolves over time. This made a huge splash but has also been viewed with healthy skepticism. Today they report that evidence has weakened. 🧪
The Dark Energy Survey Supernova Program: A Reanalysis Of Cosmology Results And Evidence For Evolving Dark Energy With An Updated Type Ia Supernova Calibration
We present improved cosmological constraints from a re-analysis of the Dark Energy Survey (DES) 5-year sample of Type Ia supernovae (DES-SN5YR). This re-analysis includes an improved photometric cross...
arxiv.org
November 12, 2025 at 12:11 PM
Hmm. The best evidence that dark energy is evolving rather than constant just got a little weaker.
The statistical significance of observational results don’t really have “momentum,” but we’ll have to continue to wait and see about this one.
The statistical significance of observational results don’t really have “momentum,” but we’ll have to continue to wait and see about this one.
Reposted by Avi Mitrani
Witkoff tries to praise Netanyahu in Tel Aviv, but has a hard time finishing his thought because of booing
October 11, 2025 at 5:33 PM
Witkoff tries to praise Netanyahu in Tel Aviv, but has a hard time finishing his thought because of booing
מסכנים החרד"לים וערוץ 14: נגמרת המלחמה והחטופים משתחררים ואסור להם להתאבל כי חג 😢
October 8, 2025 at 10:15 PM
מסכנים החרד"לים וערוץ 14: נגמרת המלחמה והחטופים משתחררים ואסור להם להתאבל כי חג 😢
Reposted by Avi Mitrani
Let me try to explain why it's important to study the foundations of quantum mechanics. (1/n)
(Have to do some breathing exercises, b/c to me it's blindingly obvious that "understanding the most important theory in physics" is something physicists should care about, but apparently opinions differ.)
(Have to do some breathing exercises, b/c to me it's blindingly obvious that "understanding the most important theory in physics" is something physicists should care about, but apparently opinions differ.)
Nature (and @lizziegibney.bsky.social) take a more-than-usually systematic look at the greatest failure of modern physics: the fact that we can't even agree on what quantum mechanics says.
And the leader is an approach that is notoriously not well-defined. Ugh.
www.nature.com/articles/d41...
And the leader is an approach that is notoriously not well-defined. Ugh.
www.nature.com/articles/d41...
July 30, 2025 at 4:35 PM
Let me try to explain why it's important to study the foundations of quantum mechanics. (1/n)
(Have to do some breathing exercises, b/c to me it's blindingly obvious that "understanding the most important theory in physics" is something physicists should care about, but apparently opinions differ.)
(Have to do some breathing exercises, b/c to me it's blindingly obvious that "understanding the most important theory in physics" is something physicists should care about, but apparently opinions differ.)
Reposted by Avi Mitrani
Breaking: The muon discrepancy seems to be officially gone. The Muon g–2 experiment at @fermilab.bsky.social
has just announced its final magnetic moment of the muon, improving precision by 1.8x. This is now in agreement with updated calculations published last week by the Theory Initiative ...🧵
has just announced its final magnetic moment of the muon, improving precision by 1.8x. This is now in agreement with updated calculations published last week by the Theory Initiative ...🧵
June 3, 2025 at 4:03 PM
Breaking: The muon discrepancy seems to be officially gone. The Muon g–2 experiment at @fermilab.bsky.social
has just announced its final magnetic moment of the muon, improving precision by 1.8x. This is now in agreement with updated calculations published last week by the Theory Initiative ...🧵
has just announced its final magnetic moment of the muon, improving precision by 1.8x. This is now in agreement with updated calculations published last week by the Theory Initiative ...🧵
Reposted by Avi Mitrani
Before the charm quark was discovered in bound states, it was predicted via indirect effects. An early success story of the electroweak model and QFT!
Mary Gaillard and John Rosner, who both passed last week, contributed to calculating the charm quark mass
🧵1/11
Mary Gaillard and John Rosner, who both passed last week, contributed to calculating the charm quark mass
🧵1/11
May 31, 2025 at 9:54 AM
Before the charm quark was discovered in bound states, it was predicted via indirect effects. An early success story of the electroweak model and QFT!
Mary Gaillard and John Rosner, who both passed last week, contributed to calculating the charm quark mass
🧵1/11
Mary Gaillard and John Rosner, who both passed last week, contributed to calculating the charm quark mass
🧵1/11
Reposted by Avi Mitrani
Even if you don't care one bit about scientific research, it's important to recognise the value of publicly funding people working on very hard problems and training bright young minds on how to solve them.
May 25, 2025 at 9:25 AM
Even if you don't care one bit about scientific research, it's important to recognise the value of publicly funding people working on very hard problems and training bright young minds on how to solve them.
Reposted by Avi Mitrani
Reposted by Avi Mitrani
Nuclear fusion startups are promising us the power of the stars here on Earth — soon. Sam Altman is so sure fusion is imminent he's willing to gamble our climate on it. But actual scientific experts explain that he's almost certainly wrong. My latest, for @fortune.com. fortune.com/2025/05/07/n...
Nuclear fusion has big backers in Sam Altman and Bill Gates, but it's still decades away
With big investments have come high—and maybe unrealistic—expectations.
fortune.com
May 7, 2025 at 5:26 PM
Nuclear fusion startups are promising us the power of the stars here on Earth — soon. Sam Altman is so sure fusion is imminent he's willing to gamble our climate on it. But actual scientific experts explain that he's almost certainly wrong. My latest, for @fortune.com. fortune.com/2025/05/07/n...
Reposted by Avi Mitrani
If you don’t understand why GenAI hallucinates so often, and most people don’t, read this:
garymarcus.substack.com/p/why-do-lar...
garymarcus.substack.com/p/why-do-lar...
Why DO large language models hallucinate?
The Henrietta Chronicles continue, guest starring Harry Shearer
garymarcus.substack.com
May 5, 2025 at 5:34 PM
If you don’t understand why GenAI hallucinates so often, and most people don’t, read this:
garymarcus.substack.com/p/why-do-lar...
garymarcus.substack.com/p/why-do-lar...
⚛️
Does quantum mechanics really need to be complex?
Why can't we just use real wavefunctions?
🧵1/15 *some math, non-relativistic QM
Why can't we just use real wavefunctions?
🧵1/15 *some math, non-relativistic QM
May 4, 2025 at 2:56 PM
⚛️
Reposted by Avi Mitrani
Take that, Bill Maher.
Brilliant. Gift link:
Larry David: My Dinner With Adolf www.nytimes.com/2025/04/21/o...
Brilliant. Gift link:
Larry David: My Dinner With Adolf www.nytimes.com/2025/04/21/o...
Opinion | Larry David: My Dinner With Adolf (Gift Article)
When a private meeting goes unexpectedly.
www.nytimes.com
April 22, 2025 at 10:46 AM
Take that, Bill Maher.
Brilliant. Gift link:
Larry David: My Dinner With Adolf www.nytimes.com/2025/04/21/o...
Brilliant. Gift link:
Larry David: My Dinner With Adolf www.nytimes.com/2025/04/21/o...
The genius Lary David 👏🏻
And yeah, Bill Maher is that foolish
And yeah, Bill Maher is that foolish
Larry David destroys Bill Maher in the most perfect way.
(gift article)
(gift article)
Opinion | Larry David: My Dinner With Adolf (Gift Article)
When a private meeting goes unexpectedly.
www.nytimes.com
April 22, 2025 at 2:15 PM
The genius Lary David 👏🏻
And yeah, Bill Maher is that foolish
And yeah, Bill Maher is that foolish
Reposted by Avi Mitrani
The Return of the Prodigal Son, by Guercino, 1651
April 10, 2025 at 12:50 AM
The Return of the Prodigal Son, by Guercino, 1651
Those chatbots 😂
So I'm a big fan of Claude, and anyone can goof up, but this did make me laugh.
February 16, 2025 at 3:36 PM
Those chatbots 😂
Genius
Portuguese editorial cartoonist Zez Vaz reaches back to Tiananmen Square to call on American defiance.
February 16, 2025 at 12:07 AM
Genius
Reposted by Avi Mitrani
After October 7, Simon Sebag Montefiore was one of the first to amplify my writing, helping me connect with key individuals and organizations, particularly in the UK. His support has meant so much.
January 30, 2025 at 2:56 PM
After October 7, Simon Sebag Montefiore was one of the first to amplify my writing, helping me connect with key individuals and organizations, particularly in the UK. His support has meant so much.
Reposted by Avi Mitrani
יצאו כמה דיווחים על חורי אבטחה בדיפסיק שישפו מידע של משתמנשים ושאילתות שלהם 😱
אתמול כתבתי אייטם בהארץ, שלא זכה לחשיפה גדולה בגלל יבנה 😭, על הסכנות של דחיפת מידע מדיפסיק וכן הבעיות הקשות שיש שם מבחינת פרטיות. בהשוואה לשירותים מערביים.
חש עצמי קסנדרה.
www.themarker.com/captain-inte...
אתמול כתבתי אייטם בהארץ, שלא זכה לחשיפה גדולה בגלל יבנה 😭, על הסכנות של דחיפת מידע מדיפסיק וכן הבעיות הקשות שיש שם מבחינת פרטיות. בהשוואה לשירותים מערביים.
חש עצמי קסנדרה.
www.themarker.com/captain-inte...
למה סכנת הפרטיות בדיפסיק חמורה יותר מאצל אחרים?
***
www.themarker.com
January 30, 2025 at 3:44 AM
יצאו כמה דיווחים על חורי אבטחה בדיפסיק שישפו מידע של משתמנשים ושאילתות שלהם 😱
אתמול כתבתי אייטם בהארץ, שלא זכה לחשיפה גדולה בגלל יבנה 😭, על הסכנות של דחיפת מידע מדיפסיק וכן הבעיות הקשות שיש שם מבחינת פרטיות. בהשוואה לשירותים מערביים.
חש עצמי קסנדרה.
www.themarker.com/captain-inte...
אתמול כתבתי אייטם בהארץ, שלא זכה לחשיפה גדולה בגלל יבנה 😭, על הסכנות של דחיפת מידע מדיפסיק וכן הבעיות הקשות שיש שם מבחינת פרטיות. בהשוואה לשירותים מערביים.
חש עצמי קסנדרה.
www.themarker.com/captain-inte...
Reposted by Avi Mitrani
My new book MORE EVERYTHING FOREVER is coming out on April 22nd! It’s about the implausible futures tech billionaires are trying to shove down our throats, why those ideas don’t work, and where they came from in the first place. You can pre-order it here:
www.hachettebookgroup.com/titles/adam-...
www.hachettebookgroup.com/titles/adam-...
More Everything Forever
How Silicon Valley’s heartless, baseless, and foolish obsessions—with escaping death, building AI tyrants, and creating limitless growth—pervert public...
www.hachettebookgroup.com
January 24, 2025 at 7:42 PM
My new book MORE EVERYTHING FOREVER is coming out on April 22nd! It’s about the implausible futures tech billionaires are trying to shove down our throats, why those ideas don’t work, and where they came from in the first place. You can pre-order it here:
www.hachettebookgroup.com/titles/adam-...
www.hachettebookgroup.com/titles/adam-...
The idiot
Trump: "Zelenskyy, I will say, he wants to settle now. He's had enough. He shouldn't have allowed this to happen either. He's no angel. He shouldn't have allowed this war to happen."
January 24, 2025 at 10:31 PM
The idiot
איזנקוט: צריך לבטל את שיטת הסניוריטי, מועמד לוין לעליון עושה רושם טוב
הארץ
www.haaretz.co.il
January 16, 2025 at 6:05 PM
Reposted by Avi Mitrani
Q: Can you assure the world that as you try to get control of areas like Greenland or Panama you are not gonna use military or economic coercion?
TRUMP: No. I can't assure you. I'm not going to commit to that. It might be that you'll have to do something.
TRUMP: No. I can't assure you. I'm not going to commit to that. It might be that you'll have to do something.
January 7, 2025 at 5:03 PM
Q: Can you assure the world that as you try to get control of areas like Greenland or Panama you are not gonna use military or economic coercion?
TRUMP: No. I can't assure you. I'm not going to commit to that. It might be that you'll have to do something.
TRUMP: No. I can't assure you. I'm not going to commit to that. It might be that you'll have to do something.
Reposted by Avi Mitrani
——The Maccabean Watershed ——
Part 4
Jerusalem and the Temple
Following the Maccabean revolt, Jerusalem underwent a seismic shift.
From a small town, with a few hundred residents, it became THE metropolis of the Jewish people in their homeland and throughout their diaspora.
🧵1/11
Part 4
Jerusalem and the Temple
Following the Maccabean revolt, Jerusalem underwent a seismic shift.
From a small town, with a few hundred residents, it became THE metropolis of the Jewish people in their homeland and throughout their diaspora.
🧵1/11
——The Maccabean Watershed ——
Part 1
The Maccabean revolt marks a watershed in world history.
It was the catalyst for the emergence of Judaism, and consequently for the birth of Christianity and Islam.
In the advent to Hannukah and Christmas, I will post a full series on this.
🧵1/10
Part 1
The Maccabean revolt marks a watershed in world history.
It was the catalyst for the emergence of Judaism, and consequently for the birth of Christianity and Islam.
In the advent to Hannukah and Christmas, I will post a full series on this.
🧵1/10
December 28, 2024 at 4:32 PM
——The Maccabean Watershed ——
Part 4
Jerusalem and the Temple
Following the Maccabean revolt, Jerusalem underwent a seismic shift.
From a small town, with a few hundred residents, it became THE metropolis of the Jewish people in their homeland and throughout their diaspora.
🧵1/11
Part 4
Jerusalem and the Temple
Following the Maccabean revolt, Jerusalem underwent a seismic shift.
From a small town, with a few hundred residents, it became THE metropolis of the Jewish people in their homeland and throughout their diaspora.
🧵1/11
Reposted by Avi Mitrani
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
Astrophysics! What are your hot takes on this? I’m stuck at the airport and want to fight about space.
www.sci.news/astronomy/da...
www.sci.news/astronomy/da...
Dark Energy is Misidentification of Variations in Kinetic Energy of Universe’s Expansion, Scientists Say | Sci.News
Dark energy -- an unknown energy source that is causing our Universe’s expansion to accelerate – doesn’t actually exist, according to new research.
www.sci.news
December 27, 2024 at 2:40 PM
A new claim that dark energy isn’t necessary, we just need to properly account for inhomogeneities in the universe. Maybe. But his idea has been discussed for a long time - David Wiltshire, an author here, has been pushing it for 20 years, and others have also looked at it. (1/n)
At last 🥃
Two machine learning algorithms can determine whether a whisky is of American or Scotch origin and identify its strongest aromas, according to research in Communications Chemistry. https://go.nature.com/3DpO8nl 🧪
December 25, 2024 at 9:06 PM
At last 🥃