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Bulletin of the Atomic Scientists

@thebulletin.org
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The best thinking on existential threats since 1945. Nuclear risk, climate change, and disruptive technologies. We set the #DoomsdayClock. thebulletin.org

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Bulletin of the Atomic Scientists @thebulletin.org · 2h
There's an issue behind warnings about superintelligence, writes Sara Goudarzi @saragoud.bsky.social. "There is no established path showing that today's AI systems will surpass the smartest humans, much less a scientific basis for calculating the likelihood that such systems will destroy humanity."
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How the bad science of AI doomerism is good for big business
There is no clear path showing that today’s AI systems will lead to superintelligence, much less a basis for calculating the probability of doom.
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Bulletin of the Atomic Scientists @thebulletin.org · 20h
In case you missed it: The final vestiges of a nomadic pastoral tradition pre-dating the founding of Rome could also be Europe's best unheralded tool to curb the extreme wildfires that ravage the continent year after year. Read more on the Bulletin's site: buff.ly/dntG2CI
Julián López’s flock of sheep graze in public lands near Cazorla, Spain. (Photo: Emerson Mendoza Ayala)A wildfire burns in northern Portugal in August 2024. (Neal Haddaway)Javier Guerrero Vilches is a third-generation transhumant shepherd. He poses for the camera in front of his flock. (Emerson Mendoza Ayala)
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Bulletin of the Atomic Scientists @thebulletin.org · 28/09/2026
France's nuclear example shows that while "technologies provide easy political hype, they must prove safety, economic viability, and a clear advantage over existing low-carbon energy alternatives before major investment is justified," write AnnaJulia Yates, Allison Macfarlane, and Alexander Wimmers.
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Why the world's top nuclear nation is sitting out the hype on small reactors
Unlike the US and UK, where start-ups and governments are betting heavily on small modular reactors, France’s state-led nuclear sector is prioritizing large-scale builds. With SMRs facing operational…
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Bulletin of the Atomic Scientists @thebulletin.org · 28/09/2026
In case you missed it: "Insiders are betting on war: How prediction markets are becoming a national security threat."
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Insiders are betting on war: How prediction markets are becoming a national security threat
Prediction markets allow those with insider information bet on national security issues, giving adversaries a potential heads-up.
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Bulletin of the Atomic Scientists @thebulletin.org · 27/09/2026
Widely thought of as the "founder of the internet," Vint Cerf discusses the ideals behind the original internet—including the emphasis on the net being an open, neutral, level playing field—and how to re-install a sense of trust to today's new AI-dominated version.
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“The internet is a giant copying machine”: Interview with Vint Cerf
Widely thought of as the “founder of the internet,” Vint Cerf talks about how to re-install a sense of trust to this new AI-dominated version, and the ideals behind the original internet—including…
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Bulletin of the Atomic Scientists @thebulletin.org · 27/09/2026
Thomas Graham, Jr., a diplomat, arms control negotiator, and a critic of President Reagan's "Star Wars" initiative, died this month at age 92. Graham spent 27 years negotiating limits on the world's nuclear arsenals and successfully led the US effort to make the Non-Proliferation Treaty permanent.
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Thomas Graham Jr. helped build an arms control system now under strain
Diplomat and negotiator Thomas Graham Jr., who died at 92, spent nearly three decades shaping every major US nuclear agreement and leading the effort to permanently extend the Non-Proliferation…
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Reposted by Bulletin of the Atomic Scientists
François Diaz-Maurin @francoisdm.bsky.social · 25/09/2026
Why is the world's top nuclear nation sitting out the hype on Small Modular Reactors (SMRs)? In a new piece for @thebulletin.org, AnnaJulia Yates, Allison Macfarlane & Alexander Wimmers break down France's cautious approach to SMRs. 🧵👇
A modern industrial facility with large circular structures, green energy components, and surrounding trees, set near mountains and wind turbines. (Image: EDF)
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Bulletin of the Atomic Scientists @thebulletin.org · 25/09/2026
Unlike the US and UK, where start-ups and governments are betting heavily on small modular reactors, France's state-led nuclear sector is prioritizing large-scale builds. AnnaJulia Yates, Allison Macfarlane, and Alexander Wimmers write about why. ⬇️
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Why the world's top nuclear nation is sitting out the hype on small reactors
Unlike the US and UK, where start-ups and governments are betting heavily on small modular reactors, France’s state-led nuclear sector is prioritizing large-scale builds. With SMRs facing operational…
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Bulletin of the Atomic Scientists @thebulletin.org · 24/09/2026
Beijing views "strategic stability" as a guarantee of non-interference, while Washington pays the phrase little mind, writes Tong Zhao. Ahead of their summit, Donald Trump and Xi Jinping must move past ambiguity and define real red lines for space weapons, missile defense, and regional security.
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Trump and Xi agreed on "strategic stability." They now need to decide what it means
Beijing views "strategic stability" as a guarantee of non-interference, while Washington pays the phrase little mind. Ahead of their Washington summit, Donald Trump and Xi Jinping must move past…
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Bulletin of the Atomic Scientists @thebulletin.org · 24/09/2026
Watch the full livestream of Climate Desk Live from New York City, featuring Zohran Mamdani, Garrison Hayes, Bulletin editor-in-chief Sharon Weinberger, and numerous other experts and leaders. buff.ly/DZ6QsFb
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- YouTube
Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
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Bulletin of the Atomic Scientists @thebulletin.org · 24/09/2026
Join us now for Climate Desk Live from New York City. ⬇️
youtube.com
Climate Desk Live: AI, Energy, and Our Fight for Democracy and a Healthy, Affordable Future
YouTube video by Free Speech TV
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Bulletin of the Atomic Scientists @thebulletin.org · 23/09/2026
The US could use its acknowledgement of having space weapons as the first step in a reciprocal transparency and risk-reduction initiative. It could invite Russia and China to acknowledge a basic reality: All three nuclear powers possess systems that could interfere with or destroy space assets.
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The US acknowledged its space weapons. Now it must build guardrails
Confirming classified space-control capabilities will not deter rivals on its own—Washington must now use this disclosure as a springboard for reciprocal transparency and risk-reduction measures…
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Bulletin of the Atomic Scientists @thebulletin.org · 23/09/2026
"Europe did not solve its data privacy problems, nor did it fix the internet. But the EU did arrive earlier at a more accurate diagnosis of these issues precisely because of the historical, governmental, and philosophical factors that differentiate it from North America." —Enrique Dans
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Three reasons Europe learned to distrust Big Tech before America did
European attitudes toward digital privacy and technology regulation are dismissed in the US as technophobia. But there are distinct, historically grounded reasons why Europe has moved further and…
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Reposted by Bulletin of the Atomic Scientists
François Diaz-Maurin @francoisdm.bsky.social · 22/09/2026
Last week, the US confirmed what competitors already assumed—it has on-orbit space weapons. Russia and China immediately accused Washington of sparking an arms race, but competition in space has been underway for years. So why disclose it now? 🧵
A man in a suit stands at a podium on stage, facing an audience, with two teleprompters in front of him and stage lights shining above. (Photo by US Air Force/Malia Heemsoth)
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Bulletin of the Atomic Scientists @thebulletin.org · 22/09/2026
Climate change has supercharged heatwaves in the Mediterranean, and rural land abandonment and dwindling pastoral activities have allowed tall greenery to grow across grasslands, turning swathes of Europe into tinderboxes. More grazing can help prevent wildfires, but shepherds need more support.
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Flocks of nomadic sheep might be Europe’s oldest fix for extreme wildfires
Extensive grazing could help protect landscapes from one of the most destructive impacts of climate change, but shepherds need more support.
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Bulletin of the Atomic Scientists @thebulletin.org · 22/09/2026
Last week marked the first time a United States official has acknowledged that the US possesses space-based weapons. An arms race in space has been underway for years, writes Mallory Stewart. The important question is why the US chose to make this disclosure now—and what it plans to do with it.
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The US acknowledged its space weapons. Now it must build guardrails
Confirming classified space-control capabilities will not deter rivals on its own—Washington must now use this disclosure as a springboard for reciprocal transparency and risk-reduction measures…
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Bulletin of the Atomic Scientists @thebulletin.org · 22/09/2026
Europe was right to worry about Big Tech, writes Enrique Dans, a professor of innovation at IE Business School, Madrid. "The harder question is how long it will take for everyone else to catch up."
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Three reasons Europe learned to distrust Big Tech before America did
European attitudes toward digital privacy and technology regulation are dismissed in the US as technophobia. But there are distinct, historically grounded reasons why Europe has moved further and…
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Bulletin of the Atomic Scientists @thebulletin.org · 21/09/2026
Extensive grazing could help protect landscapes from one of the most destructive impacts of climate change, write Tristan Bove, Emerson Mendoza Ayala, and Neal Haddaway @nealhaddaway.bsky.social. But shepherds need more support. ⬇️
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Flocks of nomadic sheep might be Europe’s oldest fix for extreme wildfires
Extensive grazing could help protect landscapes from one of the most destructive impacts of climate change, but shepherds need more support.
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Bulletin of the Atomic Scientists @thebulletin.org · 21/09/2026
We're honored to share that the Bulletin has been awarded the Miwon Peace Prize at the Peace BAR Festival at Kyung Hee University. Watch the address given by Bulletin president and CEO Alexandra Bell here: buff.ly/iSKG8we
Bulletin President and CEO Alexandra Bell, Governing Board Chair David Kuhlman, and Science and Security Board Chair Daniel Holz pose after accepting the 2nd Miwon Peace Prize. (Kyung Hee University)
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Bulletin of the Atomic Scientists @thebulletin.org · 19/09/2026
European attitudes toward digital privacy and technology regulation are often dismissed in the US as technophobia. But there are distinct, historically grounded reasons why Europe has moved further and faster to regulate Big Tech, writes Enrique Dans, a professor at IE Business School, Madrid.
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Three reasons Europe learned to distrust Big Tech before America did
European attitudes toward digital privacy and technology regulation are dismissed in the US as technophobia. But there are distinct, historically grounded reasons why Europe has moved further and…
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Bulletin of the Atomic Scientists @thebulletin.org · 19/09/2026
Repeated US and Israeli threats of further strikes on Iran’s nuclear infrastructure are converging with mounting diplomatic pressure, writes Seyed Hossein Mousavian of @princeton.edu. "Iran’s nuclear file is no longer merely a technical or legal issue." buff.ly/l7IExkR
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Bulletin of the Atomic Scientists @thebulletin.org · 18/09/2026
Countries could soon begin shaping a verification system for the Biological Weapons Convention, something it still lacks. They should build a verification scheme that generates robust, independently acquired and mutually intelligible evidence, writes Filippa Lentzos @filippalentzos.bsky.social. ⬇️
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Are countries making bioweapons? ‘Bioaudits’ could help find out
Countries could soon begin shaping the contours of a verification system for the global treaty banning bioweapons–something the Biological Weapons Convention, which entered into force in 1975, still…
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Bulletin of the Atomic Scientists @thebulletin.org · 17/09/2026
"Prediction markets are creating new nightmares for operational security," write @szakonyi.bsky.social, Michelle Kendler-Kretsch, and Michael Hornsby. They allow those with inside information to bet on national security issues, all while giving both allies and adversaries a possible heads-up.
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Insiders are betting on war: How prediction markets are becoming a national security threat
Prediction markets allow those with insider information bet on national security issues, giving adversaries a potential heads-up.
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Bulletin of the Atomic Scientists @thebulletin.org · 16/09/2026
Chinese officials have consistently dodged official acknowledgment of 320 new ICBM silos, discovered by open-source researchers in 2021. Until now.
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Here's why China acknowledged its new missile silos in a documentary
A state media documentary featuring a PLA missile engineer provides the first semi-official acknowledgment of China's vast ICBM silo fields. By highlighting the high-level rush to complete the…
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Bulletin of the Atomic Scientists @thebulletin.org · 15/09/2026
On the heels of the hottest summer on record, the Trump administration overturned most of a Biden-era rule limiting climate pollution from power plants, the second-largest source of greenhouse gas emissions, writes Liza Gross @lizagross.bsky.social.
thebulletin.org
Trump EPA rolls back climate rules for power plants
Since returning to office, Trump has overseen a multi-pronged attack on the legal and regulatory framework to protect public health and the environment from the climate-warming consequences of…
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Bulletin of the Atomic Scientists @thebulletin.org · 15/09/2026
The environmental consequences of computing—from Bitcoin mining to cloud storage, to AI and data centers—have at last become part of the collective public conversation. What should we do now?
thebulletin.org
The dirty parts of the computing world, revisited
Ten years ago in these pages, I argued that the environmental costs of computing were the dirty little secret of the digital economy. That secret is now out: Data centers have become the subject of…
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Reposted by Bulletin of the Atomic Scientists
Robert Rust @rrucs.bsky.social · 15/09/2026
My first for @bulletinatomic.bsky.social, a deep dive on a CCTV doc about China's missile silos and thoughts on what a direct reference to the project in prominent media means for our understanding of China's nuclear thinking: thebulletin.org/2026/09/here...
thebulletin.org
Here's why China acknowledged its new missile silos in a documentary
A state media documentary featuring a PLA missile engineer provides the first semi-official acknowledgment of China's vast ICBM silo fields. By highlighting the high-level rush to complete the project...
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Bulletin of the Atomic Scientists @thebulletin.org · 15/09/2026
A state media documentary provides the first semi-official acknowledgment of China's ICBM silo fields. By highlighting the rush to complete the project, Beijing signals that this expansion is driven by a need to secure a second-strike deterrent against US missile defenses, writes @rrucs.bsky.social.
thebulletin.org
Here's why China acknowledged its new missile silos in a documentary
A state media documentary featuring a PLA missile engineer provides the first semi-official acknowledgment of China's vast ICBM silo fields. By highlighting the high-level rush to complete the…
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Bulletin of the Atomic Scientists @thebulletin.org · 14/09/2026
The Bulletin's September magazine asks: What went wrong with the internet, and how do we fix it, particularly during the rise of AI?
thebulletin.org
How to fix the internet
September 2026 Bulletin Magazine
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Bulletin of the Atomic Scientists @thebulletin.org · 14/09/2026
"Nearly 240 years after the framers designed an architecture for American political life, a new constitution is currently being written, driven by artificial intelligence and set to govern American life in the 21st century and beyond," writes Allison Stanger.
thebulletin.org
The AI stack’s architecture is a constitution. It’s being written without us
Civil society, not the AI industry, should write the rules for the new constitution driven by artificial intelligence.
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Bulletin of the Atomic Scientists @thebulletin.org · 13/09/2026
Drafted behind closed doors by a small group of defense officials, a new Pentagon strategy aims to expand battlefield nuclear options and blur the line between conventional and nuclear warfare—bypassing public oversight while raising the risk of unintended escalation, writes @joecirin.bsky.social.
thebulletin.org
Pentagon's secret plan: Reviving Cold War doctrines to lower the threshold for nuclear war
Drafted behind closed doors by a small group of defense officials, a new Pentagon strategy aims to expand battlefield nuclear options and blur the line between conventional and nuclear…
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Clara Jeffery @clarajeffery.bsky.social · 12/09/2026
We teamed up with the @thebulletin.org to show how easy it is to use AI to build killer drones. Armed with zero engineering background reporter Matt Smith was able to do it. Another example of the stunning lack of guardrails in the AI universe. www.youtube.com/watch?v=W8o2...
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Have Chatbots Made Autonomous Weapons Available to Everyman?
YouTube video by Mother Jones
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Bulletin of the Atomic Scientists @thebulletin.org · 13/09/2026
"Ten years ago in these pages, I asked that we learn to see the Cloud. We have. Now we must learn to see past the smokestack to the factory behind it—its workers, its owners, its bargains, and its purposes. And once again, we need to do so quickly." —Nathan Ensmenger
thebulletin.org
The dirty parts of the computing world, revisited
Ten years ago in these pages, I argued that the environmental costs of computing were the dirty little secret of the digital economy. That secret is now out: Data centers have become the subject of…
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Bulletin of the Atomic Scientists @thebulletin.org · 11/09/2026
Media reports leaned into describing the Hugging Face incident as a case of AI agents breaking free of constraints. That narrative risks obscuring crucial points of failure, writes Eryk Salvaggio.
thebulletin.org
Rogue AI didn’t breach Hugging Face, human decisions did
At the core of the Hugging Face hacking incident were a series of human choices that traded security for speed.
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François Diaz-Maurin @francoisdm.bsky.social · 11/09/2026
A secret Pentagon review is quietly laying the groundwork to lower the threshold for nuclear war, reviving dangerous Cold War doctrines. In a new analysis for @thebulletin.org, Joe Cirincione @joecirin.bsky.social breaks down what this means—and why it's a recipe for disaster. 🧵
A control room with empty chairs, large screens showing airplanes, and a radar-like red concentric circle pattern overlaying the image. (Illustration by François Diaz-Maurin; source images via National Archives and Canva.com)
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Eryk Salvaggio @eryk.bsky.social · 11/09/2026
My essay on rogue AI has been republished by the Bulletin of the Atomic Scientists — “Rogue AI didn’t breach Hugging Face, human decisions did.” Grateful to @thebulletin.org for the invitation!
thebulletin.org
Rogue AI didn’t breach Hugging Face, human decisions did
At the core of the Hugging Face hacking incident were a series of human choices that traded security for speed.
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Bulletin of the Atomic Scientists @thebulletin.org · 11/09/2026
"A new nuclear policy is taking shape in secret, crafted by a small group of Pentagon officials, that will give President Donald Trump more ways to start a nuclear war," writes Joe Cirincione @joecirin.bsky.social.
thebulletin.org
Pentagon's secret plan: Reviving Cold War doctrines to lower the threshold for nuclear war
Drafted behind closed doors by a small group of defense officials, a new Pentagon strategy aims to expand battlefield nuclear options and blur the line between conventional and nuclear…
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Bulletin of the Atomic Scientists @thebulletin.org · 11/09/2026
At the core of the Hugging Face hacking incident were a series of human choices that traded security for speed, writes Eryk Salvaggio @eryk.bsky.social. Focusing on the human decisions allows for a more rigorous analysis of what went wrong and what can be done about it.
thebulletin.org
Rogue AI didn’t breach Hugging Face, human decisions did
Media reports leaned into describing the incident as a case of AI agents breaking free of constraints. The story risks obscuring crucial points of failure.
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Bulletin of the Atomic Scientists @thebulletin.org · 10/09/2026
The Grammy-winning Kronos Quartet, the Bulletin's Artist-in-Residence, will perform at the Strathmore in North Bethesda for a concert on the evening of January 26, 2027. Get exclusive pre-sale access to tickets for the concert by using the code "BULLETIN" here: buff.ly/F4hD7IA
Concert poster announcing Kronos Quartet's "A Hard Rain" at Strathmore, Tue, Jan 26, presented by Strathmore and the Bulletin of the Atomic Scientists; photo shows four seated string players performing on a dim, blue‑lit stage.
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Bulletin of the Atomic Scientists @thebulletin.org · 09/09/2026
From computing's environmental impact to surveillance states, to AI and, yes, enshittification, the Bulletin's September magazine tackles a simple question (and breaks down the not-so-simple answers). How can we fix the internet?
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Reposted by Bulletin of the Atomic Scientists
Hans Kristensen @nukestrat.bsky.social · 09/09/2026
In our latest FAS Nuclear Notebook we take a look at India’s nuclear arsenal, status & new developments. Freely available in: • PDF (@tandfresearch.bsky.social) www.tandfonline.com/doi/epdf/10.... • Web (@thebulletin.org) thebulletin.org/premium/2026... Questions, corrections, suggestions welcome.
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Reposted by Bulletin of the Atomic Scientists
Mackenzie Knight-Boyle @mknight.bsky.social · 09/09/2026
Our latest @scientistsorg.bsky.social Nuclear Notebook is out in @thebulletin.org! Read at the link below for our team's up-to-date estimates on India's nuclear forces 🇮🇳👇
thebulletin.org
Indian nuclear weapons, 2026
As India expands its nuclear stockpile to an estimated 190 warheads and ramps up plutonium production with its new fast breeder reactor, major technological strides in MIRV-equipped Agni-V missiles, r...
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Bulletin of the Atomic Scientists @thebulletin.org · 09/09/2026
What went wrong with the internet, and how do we fix it? The premise of the Bulletin's September magazine is straightforward—but the diagnoses and proposed solutions are not. One thing our essayists do seem to agree on, however, is that things are getting worse.
thebulletin.org
September 2026 - Bulletin of the Atomic Scientists
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Sara Goudarzi @saragoud.bsky.social · 08/09/2026
"Frontier laboratories are building architecture that is centralized three times over: The same firm trains the model, owns the infrastructure it runs on, and revises unilaterally the rules for who may speak with it and on what terms," writes @allisonstanger.bsky.social for @thebulletin.org.
thebulletin.org
The AI stack’s architecture is a constitution. It’s being written without us
Civil society, not the AI industry, should write the rules for the new constitution driven by artificial intelligence.
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Bulletin of the Atomic Scientists @thebulletin.org · 08/09/2026
Materials R&D company Radical AI is building self-driving labs in New York City where robots synthesize and test materials while AI decides what experiment to run next. The Bulletin's Rambo Talabong went inside the lab to see how it works and ask whether AI can do science without scientists.
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Inside an AI-powered lab trying to replace scientists
Radical AI is building a self-driving lab in Manhattan, with a second site opening in Brooklyn's Navy Yard, where robots synthesize and test materials while AI decides what experiment to run next.…
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Bulletin of the Atomic Scientists @thebulletin.org · 07/09/2026
"Nature is the world's worst bioterrorist" is a common maxim in the field of biosecurity — the idea that naturally emerging pathogens cause far more deaths than any biological attack a terrorist could carry out. That trope may soon be outdated, writes Steph Guerra of @rand.org.
thebulletin.org
Newly created viruses are a warning. We still have a window to stop AI-enabled bioweapons
Scientists showed recently that AI can be used to produce novel viruses. We need to build a layered system of defense before AI-enabled bioweapons capabilities become undeniably advanced—or worse,…
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Bulletin of the Atomic Scientists @thebulletin.org · 07/09/2026
Unanticipated shutdowns at nuclear power plants will increase in frequency as extreme weather events driven by climate change become more common, write Valerie Arnhold and M.V. Ramana.
thebulletin.org
Climate change is exposing nuclear power’s reliability problem
Can this trend be arrested by technology?
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Bulletin of the Atomic Scientists @thebulletin.org · 07/09/2026
A small number of private firms are effectively writing the rules for a new architecture of American political life, writes Allison Stanger. "The people who live inside these ecosystems have no exit and no voice. But it doesn't have to be this way. A constitutional alternative exists."
thebulletin.org
The AI stack’s architecture is a constitution. It’s being written without us
Civil society, not the AI industry, should write the rules for the new constitution driven by artificial intelligence.
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Bulletin of the Atomic Scientists @thebulletin.org · 06/09/2026
One of nuclear energy's biggest selling points is its claims of reliability, write Valerie Arnhold and M.V. Ramana. But this summer, several countries in Europe had to shut down nuclear plants because of hot weather and drought.
thebulletin.org
Climate change is exposing nuclear power’s reliability problem
Can this trend be arrested by technology?
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Bulletin of the Atomic Scientists @thebulletin.org · 04/09/2026
"We have a window of opportunity to build the layered system of defense we need now, before AI-enabled bioweapons capabilities become undeniably advanced—or worse, demonstrably effective," writes Steph Guerra of @rand.org.
thebulletin.org
Newly created viruses are a warning. We still have a window to stop AI-enabled bioweapons
Scientists showed recently that AI can be used to produce novel viruses. We need to build a layered system of defense before AI-enabled bioweapons capabilities become undeniably advanced—or worse,…
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