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Niayesh Afshordi

@nafshordi.bsky.social
569 followers 144 following 142 posts

Cosmologist, Astrophysicist, He/him, Brother of the Night's Watch 🏰🐉, Professor @uwaterloo and @Perimeter, Views are my own and not representative of my employers nafshordi.com

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Niayesh Afshordi @nafshordi.bsky.social · 03/10/2026
Thank you @oldchemist.bsky.social for the beautiful review and @amatajo.bsky.social for your marvellous translation of our #BattleoftheBigBang into Polish 👌
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FQxI @fqxi.org · 21/09/2026
"We may live as scientists, but we all die as philosophers" @nafshordi.bsky.social remembers his friend, mentor and collaborator Rafael Sorkin (1945–2026), a founder of causal set theory. qspace.fqxi.org/news/165330/...
qspace.fqxi.org
FQxI News: Remembering Rafael Sorkin
The Foundational Questions Institute, FQxI, catalyzes, supports, and disseminates research on questions at the foundations of science, particularly new frontiers and innovative ideas integral to a…
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Niayesh Afshordi @nafshordi.bsky.social · 03/09/2026
Does Spacetime End Here? What lies beyond a black hole horizon? In a new *Escaped Sapiens* conversation, I discuss the information paradox and whether gravitational-wave observations could test quantum structure near horizons. Hypothesis, not discovery: www.youtube.com/watch?v=68qw...
youtube.com
Is the Inside of a Black Hole Just a Physicist's Fantasy? | Niayesh Afshordi | Escaped Sapiens #97
YouTube video by Shane Farnsworth
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Amata @amatajo.bsky.social · 01/09/2026
Mój nowy przekład, "Bitwa o Wielki Wybuch" od dziś w sprzedaży! W tej niezwykłej książce Niayesh Afshordi (@nafshordi.bsky.social) i Phil Halper zestawiają konkurujące ze sobą teorie i hipotezy dotyczące początków Kosmosu. Szczerze polecam!
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Bob’s Your Uncle @bobsyouruncle.bsky.social · 25/08/2026
You mean they don’t agree on most ‘things’ that you asked about They agree on the vast majority of ‘things’
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FQxI @fqxi.org · 25/08/2026
Read more: qspace.fqxi.org/news/165326/... Listen to Niayesh on our podcast: qspace.fqxi.org/podcasts/125...
qspace.fqxi.org
FQxI News: Most Physicists Don't Agree on Most Things
The Foundational Questions Institute, FQxI, catalyzes, supports, and disseminates research on questions at the foundations of science, particularly new frontiers and innovative ideas integral to a…
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FQxI @fqxi.org · 25/08/2026
@nafshordi.bsky.social and Phil Halper surveyed 1,675 physicists on ten of the big unanswered questions. Ghazal Geshnizjani and @seanmcarroll.bsky.social joined them to go through the results.
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Niayesh Afshordi @nafshordi.bsky.social · 07/08/2026
Listen to Hassan!
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Niayesh Afshordi @nafshordi.bsky.social · 05/08/2026
New episode of The Physics Frontier with Jessica Ryuzaki: how observations, theory, mathematical tools, and AI shape physics, and how students can begin research. Watch: www.youtube.com/watch?v=h18F...
youtube.com
The Physics Frontier Ep 1 - Dr. Niayesh Afshordi
YouTube video by The Physics Frontier
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Niayesh Afshordi @nafshordi.bsky.social · 04/08/2026
Matthew A. Bell's new piece, “Science by majority,” looks at what the Big Mysteries Survey reveals about consensus and disagreement in physics. byebyeuniverse.substack.com/p/science-by...
Heat map titled “Background shifts the dark-matter debate.” Rows compare survey respondents by background; columns list possible dark-matter explanations. Colored cells show how each group differs from the overall sample.
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Niayesh Afshordi @nafshordi.bsky.social · 01/08/2026
Do physicists have faith? @drbriankeating.bsky.social saw "intellectual denominations" in our survey; @philhalper.bsky.social challenged that reading; @adamfrank4.bsky.social defended empirical physics. I return to Chapter 11: nafshordi.com/2026/08/01/d...
Four people in a dark, book-lined study debate around a table as a beam of starlight passes through a glass prism, splitting into colored rays across papers and an open book.
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ifimreallyhonest.bsky.social @ifimreallyhonest.bsky.social · 25/07/2026
Does the Big Bang really imply a beginning to the universe? @philhalper.bsky.social talks about the book he co-authored with @nafshordi.bsky.social on this topic, and on scientific consensus. www.youtube.com/watch?v=66HP...
youtube.com
Phil Halper - What Happened Before the Big Bang?
YouTube video by If I'm Really Honest
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Niayesh Afshordi @nafshordi.bsky.social · 21/07/2026
Can black-hole entropy predict testable departures from Kerr? New work with Shokoufe Faraji sets a theoretical target, not a detection. Paper: arxiv.org/abs/2508.20421 Article: nafshordi.com/2026/07/21/d...
arxiv.org
Self-regularized entropy: What does black hole entropy predict for tests of Kerr no-hair theorem?
We compute the canonical, or brick-wall, entropy of a massless scalar field in a quantum black hole model whose strong field exterior is described phenomenologically by the static $q$-metric, also kno...
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Metin Seven, Moon Child's dad 🌝 @seven.eurosky.social · 19/07/2026
Photo of a van with a text printed on its back: "We fix what ChatGPT said you should try!"
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Niayesh Afshordi @nafshordi.bsky.social · 19/07/2026
🤩
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Niayesh Afshordi @nafshordi.bsky.social · 15/07/2026
New writing: Cleaning the CMB Backlight. A paper by Guandi Zhao and Alex Krolewski shows how radio foregrounds change inferred tSZ around low-mass galaxies, tracing a puzzle first explored with Natacha Altamirano and Chiamaka Okoli. nafshordi.com/2026/07/14/c...
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Niayesh Afshordi @nafshordi.bsky.social · 23/06/2026
Out today: the audiobook of Battle of the Big Bang. What came before the Big Bang? Listen to the battle of ideas: inflation, bounces, cyclic universes, multiverses, black hole births, holography, and more. rbmediaglobal.com/audiobook/97...
rbmediaglobal.com
RBmedia | Battle of the Big Bang
Listen to the audiobook Battle of the Big Bang, written by Niayesh Afshordi;Phil Halper, narrated by Nas Mehdi.
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Niayesh Afshordi @nafshordi.bsky.social · 19/06/2026
The universe began with a bang — and now it has a voice. The audiobook of #BattleoftheBigBang, w/ @philhalper.bsky.social is out next week, narrated by Nas Mehdi. If you prefer listening to the #BigBang on walks, commutes, or summer trips, this is for you: rbmediaglobal.com/audiobook/97...
rbmediaglobal.com
RBmedia | Battle of the Big Bang
Listen to the audiobook Battle of the Big Bang, written by Niayesh Afshordi;Phil Halper, narrated by Nas Mehdi.
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Niayesh Afshordi @nafshordi.bsky.social · 29/05/2026
I am the cosmologist 🤣
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Niayesh Afshordi @nafshordi.bsky.social · 22/05/2026
#BattleoftheBigBang (w/ @philhalper.bsky.social) is back in @thewallstreet.bsky.social — this time in the “Five Best: Cosmic Origins and Endings” feature selected by @dreochapman.bsky.social, alongside Stephen Hawking, Steve Weinberg, Simon Singh, and @astrokatie.com 🎉 www.wsj.com/arts-culture...
A cosmic-themed collage showing five book covers selected for The Wall Street Journal’s “Five Best: Cosmic Origins and Endings,” arranged in a semicircle over a dark star-filled background. Battle of the Big Bang by Niayesh Afshordi and Phil Halper appears in the center, slightly emphasized relative to the other covers.
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Sean Carroll @seanmcarroll.bsky.social · 14/05/2026
What do (real) physicists think about the big unanswered questions in fundamental physics? Niayesh Afshordi @nafshordi.bsky.social has made a page presenting results of an APS survey he did with Phil Halper. nafshordi.github.io/aps-dashboard/
Example responses from a survey of physicists, in this case their opinions about what is causing the expansion of the universe to accelerate. 25% say time-varying field, 24% say cosmological constant, and then others.
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Luke Bones 🦴🦴 @lukemeister.bsky.social · 14/05/2026
American Physical Society survey on 'big mysteries' reported by @nafshordi.bsky.social et al. reveals a land of contrast ;) arxiv.org/abs/2605.11058
Big Mysteries Survey: Physicists' Views on Cosmology, Black Holes, Quantum Mechanics, and Quantum Gravity

Niayesh Afshordi, Phil Halper, Matteo Rini, Michael Schirber

We present results from the Big Mysteries Survey, a large-scale survey conducted through the American Physical Society's Physics Magazine on foundational and controversial topics in contemporary physics. The survey provides a snapshot of physicists' views on issues in cosmology, black-hole physics, quantum mechanics, quantum gravity, and anthropic coincidences. A central finding is that several positions often described publicly as field-wide ``consensus'' views are, in practice, supported by much narrower majorities or by pluralities rather than majorities.

Comments:	31 pages, 12 figures, interactive data available at: this https URL
Subjects:	Physics and Society (physics.soc-ph); Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); History and Philosophy of Physics (physics.hist-ph)

Cite as:	arXiv:2605.11058 [physics.soc-ph]
 	(or arXiv:2605.11058v1 [physics.soc-ph] for this version)
 
https://doi.org/10.48550/arXiv.2605.11058
Respondents disagree on the nature of dark matter.
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philhalper.bsky.social @philhalper.bsky.social · 12/05/2026
The largest survey of physicists ever conducted is out. They were asked their opinions on the Big Bang, Dark Matter, Dark Energy & more. We discuss the results in a new video with @seanmcarroll.bsky.social and @nafshordi.bsky.social and @ghazalgesh.bsky.social www.youtube.com/watch?v=6B00...
youtube.com
World's largest ever survey of physicists, results & reaction
YouTube video by Phil Halper (aka Skydivephil)
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Perimeter Institute for Theoretical Physics @perimeterinstitute.bsky.social · 26/03/2026
The research team behind this work was led by Dr. Niayesh Afshordi, associate faculty at Perimeter Institute and professor of physics and astronomy at @uwaterloo.ca. Learn more: perimeterinstitute.ca/news/new-the...
perimeterinstitute.ca
New theory reshapes quantum view of Big Bang | PI News
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philhalper.bsky.social @philhalper.bsky.social · 17/03/2026
Causal Set Theory predicted dark energy 10 years before its discovery. Here we explore this quantum gravity proposal with its originators, exploring cyclic universes, black holes, the nature of time and fine-tuning with @nafshordi.bsky.social www.youtube.com/watch?v=5EoZ...
youtube.com
Causal Sets : The quantum theory that predicted dark energy
YouTube video by Phil Halper (aka Skydivephil)
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Katie Mack @astrokatie.com · 12/02/2026
You can't... repeal... a scientific finding. At that point it's just called lying about it.
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FQxI @fqxi.org · 12/01/2026
What have our members achieved in the last year..? Quite a lot it turns out. qspace.fqxi.org/news/165315/... @alyssaney.bsky.social @nicoleyh11.bsky.social @seanmcarroll.bsky.social @nafshordi.bsky.social @saraimari.bsky.social @rovelli.bsky.social @coecke.bsky.social @postquantum.bsky.social
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Mike Hixenbaugh @mikehixenbaugh.com · 08/01/2026
The New York Times states it plainly in display type: Videos Contradict Trump Administration Account of ICE Shooting in Minneapolis
nytimes.com
Video: Videos Contradict Trump Administration Account of ICE Shooting in Minneapolis
An analysis of footage from three camera angles shows that the motorist was driving away from — not toward — a federal officer when he opened fire.
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Niayesh Afshordi @nafshordi.bsky.social · 03/12/2025
If you’re searching for a gift for someone who loves real science — not the click-bait shortcuts — Battle of the Big Bang might be the cosmic spark you’re looking for. (1/3)
Smithsonian Magazine
A picture the book “Battle of the Big Bang”, as a gift under the christmas tree
The Ten Best Science Books of 2025
The perfect gift for the scientifically curious
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Atheism Actually @atheismactually.com · 30/11/2025
-- DEBATE | Does The Big Bang Reveal God? -- (#HughRoss Vs @philhalper.bsky.social & @nafshordi.bsky.social) www.youtube.com/watch?v=G7yf... #God #BigBang #cosmology #cosmogony #physics #science #Christianity #apologetics #debate
youtube.com
DEBATE | Does The Big Bang Reveal God? | Dr. Hugh Ross Vs Phil Halper & Niayesh Afshordi
YouTube video by Modern-Day Debate
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Niayesh Afshordi @nafshordi.bsky.social · 27/11/2025
🚀 New(ish) paper! With my student Ruolin Liu and Jérôme Quintin, we show how quadratic gravity can offer an ultraviolet completion of the Big Bang. Its renormalization group flow yields arguably the first UV-complete inflation model without ghost instabilities. (1/3)
renormalization group flow for quadratic gravity, highlighting the trajectory with inflation
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philhalper.bsky.social @philhalper.bsky.social · 25/11/2025
What triggered the Big Bang, a new paper from @nafshordi.bsky.social and colleagues suggests that an old theory fo quanutm gravity might be the answer and looks to fit new data better than standard cosmology. All explained in this new video www.youtube.com/watch?v=TZeL...
youtube.com
Inflation from Quantum Gravity: New evidence revealed?
YouTube video by Phil Halper (aka Skydivephil)
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FQxI @fqxi.org · 07/11/2025
We spoke to Hassan recently at @perimeterinstitute.ca, where he's working with @nafshordi.bsky.social to detect quantum echoes in #GravitationalWaves as a way to prove #QuantumGravity.
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Nikhil Shah @grandmastershah.bsky.social · 18/10/2025
Yesterday I was waiting at an ICE office with a client to make sure that she was not going to get deported. It was a 5 hour excruciating wait without internet access and I was reading the book, Battle of the Big Bang by @nafshordi.bsky.social This passage made me stop and rethink reality :)
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Nikhil Shah @grandmastershah.bsky.social · 18/10/2025
I also texted a physicist friend, Spiros Michalakis (when I would get reception occasionally) about the passage and he agreed and asked me about the book. Thank you to @seanmcarroll.bsky.social for the podcast with @nafshordi.bsky.social which intrigued me enough to get the book.
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Niayesh Afshordi @nafshordi.bsky.social · 18/10/2025
🎃 Haunted Cosmology Celtic Tour: Dublin & Edinburgh 🕯️ This October, Phil and I are taking our ghost-hunting into the heart of cosmology. Join us for a journey through cosmic ghosts, phantoms, and monsters — not from folklore, but from the deepest mysteries of physics. (1/4)
graphic showing a hallowen-themed pumpkin head and a ghost, reads: "Haunted Cosmology Tour"
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Malcolm Fairbairn @malcfairbairn.bsky.social · 14/10/2025
Oh, hi, yeah by the way, US democratic party, Trump is getting the credit for this peace deal because you were so useless. Trump. Think about that.
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Niayesh Afshordi @nafshordi.bsky.social · 10/10/2025
New Debate Out Now “Has Science Just Proved God?” I had the privilege of debating alongside Michel-Yves Bolloré, under moderator John Nelson, on whether modern science points toward a divine creator. Watch here ▶️ youtu.be/DO5iArbukzg #ScienceAndFaith #Cosmology #Philosophy (1/2)
youtu.be
Has Science Just Proved God? Michel-Yves Bolloré v Niayesh Asfshordi hosted by John Nelson
YouTube video by Premier Unbelievable?
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IROON ایرون @irooncom.bsky.social · 08/08/2025
The Royal Institution: Prof. Niyayesh Afshordi lecture on what really happened during the #BigBang iroon.com/irtn/vlog/55... #Cosmology #Physics #Science
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Niayesh Afshordi @nafshordi.bsky.social · 19/09/2025
#BattleoftheBigBang with @philhalper.bsky.social
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Niayesh Afshordi @nafshordi.bsky.social · 13/09/2025
Thanks @danfalk.bsky.social and @reviewcanada.bsky.social for this thoughtful review of our #BattleoftheBigBang @philhalper.bsky.social @uchicagopress.bsky.social
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philhalper.bsky.social @philhalper.bsky.social · 10/09/2025
Why dark energy does not rule out a cyclic cosmos. @nafshordi.bsky.social and I debunk this commonly held myth in our new video www.youtube.com/watch?v=dHzo...
youtube.com
Big Bang myths . Does dark energy disprove a cyclic cosmos?
YouTube video by Phil Halper (aka Skydivephil)
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Niayesh Afshordi @nafshordi.bsky.social · 11/09/2025
@chanda.bsky.social was my first PhD student, and this was my first PhD cake! She has now surpassed me in every way, and I couldn’t be prouder.
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Niayesh Afshordi @nafshordi.bsky.social · 11/09/2025
Thanks @chanda.bsky.social for the plug! @uchicagopress.bsky.social
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 10/09/2025
Celebrate this anniversary with me by 1. Preordering my next book
penguinrandomhouse.com
The Edge of Space-Time by Chanda Prescod-Weinstein: 9780593701683 | PenguinRandomHouse.com: Books
A fresh, charming, socially conscious tour of the mysteries of space-time, from the award-winning author of The Disordered Cosmos In her highly acclaimed debut, distinguished cosmologist and particle...
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Katie Mack @astrokatie.com · 02/09/2025
I’m doing a public talk with @perimeterinstitute.ca in Waterloo! www.eventbrite.ca/e/how-the-un... (Tickets are free but you have to be quick — Eventbrite ticket reservations open at 9am Eastern Sep 2, which is in… 5 minutes)
eventbrite.ca
How the Universe Ends - Katie Mack (CIGI)
The Big Bang started the universe 13.8B years ago - but how might it end? Here's what modern astrophysics says about its ultimate fate.
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 28/08/2025
What if scientists hadn’t waited until this point to speak about politics Every time I see a headline like this, my brain just shouts Like what if scientists hadn’t sat around silently watching everyone around them get attacked Maybe the fight on campus would have gone differently
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Chanda Prescod-Weinstein 🌌 @chanda.blacksky.app · 27/08/2025
The only prayer that matters when it comes to the regular and repeated murder of American children while they are at school is the kind of prayer that is taking action, the kind of prayer that materially fights for the living, the kind of prayer that says "never again" and means it, from MN to Gaza.
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Niayesh Afshordi @nafshordi.bsky.social · 23/08/2025
Time is running out to apply for our workshop: "50 years of the black hole information paradox: November 3 -7 , 2025" at Simons Center for Geometry and Physics scgp.stonybrook.edu/archives/45328
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Niayesh Afshordi @nafshordi.bsky.social · 22/08/2025
#BattleoftheBigBang @uchicagopress.bsky.social
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