Sean Carroll
@seanmcarroll.bsky.social
Physics, philosophy, complexity. @jhuartssciences.bsky.social & @sfiscience.bsky.social. Host, #MindscapePodcast. Married to @jenlucpiquant.bsky.social.
Latest books: The Biggest Ideas in the Universe.
https://preposterousuniverse.com/
Latest books: The Biggest Ideas in the Universe.
https://preposterousuniverse.com/
Pinned
Johns Hopkins University, Physics and Astronomy
Job #AJO30496, Postdoctoral Fellow in Foundations of Physics, Complexity, and Emergence, Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland, US
academicjobsonline.org
Postdoc job! I expect to have an opening at Johns Hopkins for a postdoctoral researcher working somewhere in the broad realms of physics, philosophy, and complexity. Apply at Academic Jobs Online:
academicjobsonline.org/ajo/jobs/30496
academicjobsonline.org/ajo/jobs/30496
Reposted by Sean Carroll
Huh well it turns out I heard from a few federal workers about this and well
"We civil servants organized to help our colleagues face the hardship of the shutdown, we put up with the pain and our only request was to not be betrayed like this. Trade our pain, make it count."
"We civil servants organized to help our colleagues face the hardship of the shutdown, we put up with the pain and our only request was to not be betrayed like this. Trade our pain, make it count."
November 10, 2025 at 9:30 PM
Huh well it turns out I heard from a few federal workers about this and well
"We civil servants organized to help our colleagues face the hardship of the shutdown, we put up with the pain and our only request was to not be betrayed like this. Trade our pain, make it count."
"We civil servants organized to help our colleagues face the hardship of the shutdown, we put up with the pain and our only request was to not be betrayed like this. Trade our pain, make it count."
The last talk on the second day of the #NaturalPhilosophy Symposium was Anil Seth @anilseth.bsky.social on Can AI Be Conscious? Commentary by E.J. Green.
www.youtube.com/watch?v=Bzvs...
www.youtube.com/watch?v=Bzvs...
November 10, 2025 at 8:18 PM
The last talk on the second day of the #NaturalPhilosophy Symposium was Anil Seth @anilseth.bsky.social on Can AI Be Conscious? Commentary by E.J. Green.
www.youtube.com/watch?v=Bzvs...
www.youtube.com/watch?v=Bzvs...
Reposted by Sean Carroll
Happy "Lights All Askew" Day to all who celebrate! (Headline in the New York Times from Nov. 10, 1919, brings Einstein's theory of gravity, general relativity -- along with its alleged incomprehensibility -- to the public.) 🪐🔭🧠📰 #physics #science #histsci #lightsallaskew
November 10, 2025 at 4:03 PM
Happy "Lights All Askew" Day to all who celebrate! (Headline in the New York Times from Nov. 10, 1919, brings Einstein's theory of gravity, general relativity -- along with its alleged incomprehensibility -- to the public.) 🪐🔭🧠📰 #physics #science #histsci #lightsallaskew
Mindscape 335 | Andrew Jaffe on Models, Probability, and the Universe. #MindscapePodcast
www.preposterousuniverse.com/podcast/2025...
www.preposterousuniverse.com/podcast/2025...
November 10, 2025 at 12:15 PM
Mindscape 335 | Andrew Jaffe on Models, Probability, and the Universe. #MindscapePodcast
www.preposterousuniverse.com/podcast/2025...
www.preposterousuniverse.com/podcast/2025...
So good to have Sixers basketball back. Last year simply didn’t happen, as far as I can remember.
November 10, 2025 at 1:26 AM
So good to have Sixers basketball back. Last year simply didn’t happen, as far as I can remember.
Reposted by Sean Carroll
How often do you find yourself wishing for a newsletter that covered fundamental physics in way that was accessible but not dumbed down? Pretty often, I am sure!
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
The Spacetime Beat | Nirmalya Kajuri | Substack
All the cool fundamental physics you have been missing out on. Click to read The Spacetime Beat, by Nirmalya Kajuri, a Substack publication with hundreds of subscribers.
nirmalyakajuri.substack.com
November 9, 2025 at 5:21 PM
How often do you find yourself wishing for a newsletter that covered fundamental physics in way that was accessible but not dumbed down? Pretty often, I am sure!
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Well, here it is. My free newsletter--"The Spacetime Beat". Enjoy!
nirmalyakajuri.substack.com
⚛️🧪
Reposted by Sean Carroll
Remarkable.
BREAKING: Mark Wolf, appointed to the federal bench by Ronald Reagan, writes that he is resigning as a judge to have the freedom to speak out against the president's assault on the rule of law.
www.theatlantic.com/ideas/2025/1...
www.theatlantic.com/ideas/2025/1...
November 9, 2025 at 3:34 PM
Remarkable.
Reposted by Sean Carroll
Hey babe wake up. New periodic table of the elements just dropped
please don't @ me like "actually cerium is unique among the lanthanides for its +4 oxidation state"
⚗️🧪 #chemsky
⚗️🧪 #chemsky
November 8, 2025 at 4:54 PM
Hey babe wake up. New periodic table of the elements just dropped
Reposted by Sean Carroll
The sparky, disorderly, collaborative flow of progress.
We've come a long way in understanding the deep physical structure of everything, but humans realising things is always a messy business.
Wonderfully clear short presentation by @seanmcarroll.bsky.social
www.youtube.com/watch?v=rT7D...
We've come a long way in understanding the deep physical structure of everything, but humans realising things is always a messy business.
Wonderfully clear short presentation by @seanmcarroll.bsky.social
www.youtube.com/watch?v=rT7D...
Sean Carroll: Einstein’s most radical thought
YouTube video by Big Think
www.youtube.com
November 8, 2025 at 12:08 PM
The sparky, disorderly, collaborative flow of progress.
We've come a long way in understanding the deep physical structure of everything, but humans realising things is always a messy business.
Wonderfully clear short presentation by @seanmcarroll.bsky.social
www.youtube.com/watch?v=rT7D...
We've come a long way in understanding the deep physical structure of everything, but humans realising things is always a messy business.
Wonderfully clear short presentation by @seanmcarroll.bsky.social
www.youtube.com/watch?v=rT7D...
Reposted by Sean Carroll
On the latest Strange New Worlds, I share my conversation with @seanmcarroll.bsky.social on his Mindscape Podcast, where we talk about astrobiology, the origins of life, and complexity.
Episode 191: Mike on Sean Carroll's Mindscape
Mike beams aboard Sean Carroll's Mindscape Podcast to talk about astrobiology, the origins of life, complexity, and the proposal for a
soundcloud.com
November 8, 2025 at 12:57 PM
On the latest Strange New Worlds, I share my conversation with @seanmcarroll.bsky.social on his Mindscape Podcast, where we talk about astrobiology, the origins of life, and complexity.
Reposted by Sean Carroll
You can’t really blame arXiv for the decision to stop publishing computer science stuff (given the flood of slop) but this is also a textbook example of a global public good being gratuitously degraded www.nature.com/articles/d41...
Preprint site arXiv is banning computer-science reviews: here’s why
The repository is taking steps to tackle a surge in low quality, AI-generated content.
www.nature.com
November 7, 2025 at 11:28 PM
You can’t really blame arXiv for the decision to stop publishing computer science stuff (given the flood of slop) but this is also a textbook example of a global public good being gratuitously degraded www.nature.com/articles/d41...
Boooo
BREAKING: Cornell caved.
Here is the settlement agreement, signed today by the university's president, Michael Kotlikoff: statements.cornell.edu/2025/documen...
Here is the settlement agreement, signed today by the university's president, Michael Kotlikoff: statements.cornell.edu/2025/documen...
November 7, 2025 at 6:02 PM
Boooo
Reposted by Sean Carroll
My @protectdemocracy.org colleague Hayden Johnson did an incredible job explaining the importance of the legal win against ICE in Chicago yesterday. Give it a watch and repost and/or give a reply I can send to him and the rest of the legal crew!
www.ifyoucankeepit.org/p/is-the-aut...
www.ifyoucankeepit.org/p/is-the-aut...
Is the authoritarian project faltering?
Trump is running out of options
www.ifyoucankeepit.org
November 7, 2025 at 6:00 PM
My @protectdemocracy.org colleague Hayden Johnson did an incredible job explaining the importance of the legal win against ICE in Chicago yesterday. Give it a watch and repost and/or give a reply I can send to him and the rest of the legal crew!
www.ifyoucankeepit.org/p/is-the-aut...
www.ifyoucankeepit.org/p/is-the-aut...
Next up from the #NaturalPhilosophy Symposium is Emily Riehl @emilyriehl.bsky.social on A New Paradigm for Mathematical Proof? With commentary by Justin Clarke-Doane.
www.youtube.com/watch?v=fzxW...
www.youtube.com/watch?v=fzxW...
November 7, 2025 at 3:03 PM
Next up from the #NaturalPhilosophy Symposium is Emily Riehl @emilyriehl.bsky.social on A New Paradigm for Mathematical Proof? With commentary by Justin Clarke-Doane.
www.youtube.com/watch?v=fzxW...
www.youtube.com/watch?v=fzxW...
Reposted by Sean Carroll
#NYC area folks - SciFri event at the Greene Space - Friday 12/5 6-9pm. 1st hour - open bar, hors d'oeuvres & talking w/ @heyira.bsky.social & @seanmcarroll.bsky.social. Only 130 seats. Tickets $200/each. Come for a fun night of science!
www.sciencefriday.com/articles/sea...
www.sciencefriday.com/articles/sea...
An Evening Of Physics And Philosophy With Dr. Sean M. Carroll
Host Ira Flatow will be joined by award-winning physicist Dr. Sean M. Carroll to discuss his book, “The Biggest Ideas in the Universe.”
www.sciencefriday.com
November 6, 2025 at 9:57 PM
#NYC area folks - SciFri event at the Greene Space - Friday 12/5 6-9pm. 1st hour - open bar, hors d'oeuvres & talking w/ @heyira.bsky.social & @seanmcarroll.bsky.social. Only 130 seats. Tickets $200/each. Come for a fun night of science!
www.sciencefriday.com/articles/sea...
www.sciencefriday.com/articles/sea...
Reposted by Sean Carroll
A List of Things Said to Have Been Ruined by Women
🧵
🧵
November 6, 2025 at 8:43 PM
A List of Things Said to Have Been Ruined by Women
🧵
🧵
No opinion about this specific claim, but I do think we need more humanities in our lives and hearts and minds. And more arts. More history, more literature, more painting, more moral philosophy, more poetry. More thinking about and cherishing what makes human life special.
I don’t know about you but I sincerely believe that Zohran Mamdani’s BA Major in Africana Studies enabled him to understand our current conjuncture & its demands of justice. Humanities shape minds & in his case for the better.
I know white tech bros disagree as they continue to collapse our worlds.
I know white tech bros disagree as they continue to collapse our worlds.
November 6, 2025 at 8:18 PM
No opinion about this specific claim, but I do think we need more humanities in our lives and hearts and minds. And more arts. More history, more literature, more painting, more moral philosophy, more poetry. More thinking about and cherishing what makes human life special.
Reposted by Sean Carroll
What is happening at Goddard is absolutely devastating. We are losing history. We are losing an incredible amount of human talent, skill, and knowledge. Rebuilding it will be impossible same for same. Industry can not absorb the people or the equipment. This is undoing space science in the US.
Goddard spacecraft engineer: "I think it just kind of speaks to the atmosphere of the agency and the nation, where people are like, 'Well, laws don't matter for the people at the top anymore.'"
NASA is sinking its flagship science center during the government shutdown — and may be breaking the law in the process, critics say
"There is just a general acknowledgement that a lot of what is happening is illegal…"
www.space.com
November 6, 2025 at 3:43 PM
What is happening at Goddard is absolutely devastating. We are losing history. We are losing an incredible amount of human talent, skill, and knowledge. Rebuilding it will be impossible same for same. Industry can not absorb the people or the equipment. This is undoing space science in the US.
Next talk from the #NaturalPhilosophy Symposium is David Albert on Fundamental Laws of Physics and the Idea of Agency, with commentary by Naftali Weinberger @dagophile.bsky.social.
www.youtube.com/watch?v=8TwP...
www.youtube.com/watch?v=8TwP...
November 5, 2025 at 1:51 PM
Next talk from the #NaturalPhilosophy Symposium is David Albert on Fundamental Laws of Physics and the Idea of Agency, with commentary by Naftali Weinberger @dagophile.bsky.social.
www.youtube.com/watch?v=8TwP...
www.youtube.com/watch?v=8TwP...
The laws of physics are always the first to go.
Do #AI-generated videos obey physics laws? We present a simple, fun, and educational experiment that uses physics to distinguish an AI-generated video from a real one, using freely available online tools. Check it out: https://ow.ly/C26950XlcLl
#physicseducation #scienceexperiments
#physicseducation #scienceexperiments
November 5, 2025 at 12:31 PM
The laws of physics are always the first to go.
Next talk from the #NaturalPhilosophy Symposium is Simon DeDeo @simondedeo.bsky.social on Hard Proofs and Good Reasons, followed by commentary by Jeremy Goodman.
Next talk from the #NaturalPhilosophy Symposium is Jennifer Nagel on The Natural Structure of Common Knowledge, with commentary by Steven Gross.
www.youtube.com/watch?v=uEiQ...
www.youtube.com/watch?v=uEiQ...
November 4, 2025 at 4:31 PM
Next talk from the #NaturalPhilosophy Symposium is Simon DeDeo @simondedeo.bsky.social on Hard Proofs and Good Reasons, followed by commentary by Jeremy Goodman.
Several people eventually offered this (correct) answer! Many thanks, I should have figured this out.
bsky.app/profile/astr...
bsky.app/profile/astr...
Is there a simple way to write the symbol $\hbar$ in a skeet?
Today in #QM1: coherent states of the simple harmonic oscillator! These are the "most classical" that SHO states can be. For one thing, they saturate the Heisenberg Uncertainty Principle bound on (Δx)(Δp). Which means they look like Gaussian wave packets in position space.
November 3, 2025 at 6:55 PM
Several people eventually offered this (correct) answer! Many thanks, I should have figured this out.
bsky.app/profile/astr...
bsky.app/profile/astr...
Next talk from the #NaturalPhilosophy Symposium is Jennifer Nagel on The Natural Structure of Common Knowledge, with commentary by Steven Gross.
www.youtube.com/watch?v=uEiQ...
www.youtube.com/watch?v=uEiQ...
November 3, 2025 at 6:44 PM
Next talk from the #NaturalPhilosophy Symposium is Jennifer Nagel on The Natural Structure of Common Knowledge, with commentary by Steven Gross.
www.youtube.com/watch?v=uEiQ...
www.youtube.com/watch?v=uEiQ...
Is there a simple way to write the symbol $\hbar$ in a skeet?
Today in #QM1: coherent states of the simple harmonic oscillator! These are the "most classical" that SHO states can be. For one thing, they saturate the Heisenberg Uncertainty Principle bound on (Δx)(Δp). Which means they look like Gaussian wave packets in position space.
November 3, 2025 at 5:50 PM
Is there a simple way to write the symbol $\hbar$ in a skeet?
Gorgeous day on JHU campus. Not sure why the pumpkins don’t look happier about it.
November 3, 2025 at 4:51 PM
Gorgeous day on JHU campus. Not sure why the pumpkins don’t look happier about it.