“The Doomsday Clock is a sign of leaders’ failure to act responsibly in the face of existential threats.
“They have not heeded the warnings of previous years, so once again the hands of the clock have moved even closer to midnight.”
Juan Manuel Santos
Chair of The Elders
“The looming expiration of the New START treaty between Russia and the USA means nuclear risks are likely to get even higher. This is intolerable. Humanity deserves better. Global citizens need to mobilise and make their voices heard, so leaders feel real and urgent pressure to change course.”
Juan Manuel Santos
Chair of The Elders
The Doomsday Clock has moved four seconds closer to midnight.
This is the consequence of world leaders’ lack of attention to the nuclear threat.
thebulletin.org/doomsday-clo...
28.01.2026 10:32 — 👍 7 🔁 3 💬 0 📌 0
"The Doomsday Clock's message cannot be clearer. Catastrophic risks are on the rise, cooperation is on the decline, and we are running out of time. Change is both necessary and possible, but the global community must demand swift action from their leaders."
— Alexandra Bell
Bulletin President and CEO
“National leaders … must take the lead in finding a path away from the brink,” writes the Science and Security Board in the 2026 Doomsday Clock statement.
“Citizens must insist they do so.”
Watch the announcement: buff.ly/BGu0Zse
27.01.2026 16:07 — 👍 42 🔁 25 💬 2 📌 6
Are we safer this year than we were last year?
Tomorrow, watch the 2026 Doomsday Clock announcement to hear what experts think.
Tomorrow, the Bulletin of the Atomic Scientists' Science and Security Board will reveal the 2026 Doomsday Clock time.
The announcement will be livestreamed at this link and on the Bulletin's YouTube channel: buff.ly/BGu0Zse
26.01.2026 14:30 — 👍 23 🔁 21 💬 2 📌 4
It is like a knife in my heart when I see what these thugs are doing to decent and loving people. He was trying to help a woman who had been violently pushed to the ground. And paid for that with his life, murdered by violent and vicious criminals masquerading as law-enforcement.
25.01.2026 03:00 — 👍 332 🔁 97 💬 9 📌 0
‘Shattered’: US scientists speak out about how Trump policies disrupted their careers
Researchers lay bare the human toll of lay-offs, funding cuts and attacks on science one year after the president’s return to the White House.
We're one year in. The speed, scope and severity of what's happening to American science is beyond anything we've seen before. The reliability of the Federal science and technology enterprise and the people within it, has been shattered. www.nature.com/articles/d41...
20.01.2026 12:42 — 👍 93 🔁 52 💬 2 📌 1
Discover the seven stories Kim Stanley Robinson selected as the winners of the Bulletin's Write Before Midnight contest in our January magazine issue.
Start reading: buff.ly/mNO6mTQ
13.01.2026 15:46 — 👍 24 🔁 12 💬 0 📌 3
Fallout maps show how an attack on nuclear silos would impact US cities
USA TODAY mapped the far-reaching potential consequences of a nuclear strike against America's 450 nuclear missile silos.
I had a really fun time working on the code that was used to make these fallout visualizations for this USA Today article. I will soon be incorporating some of it into the NUKEMAP and probably making a version of this "mass attack fallout mapper" for public use. www.usatoday.com/graphics/int...
06.01.2026 17:11 — 👍 126 🔁 34 💬 11 📌 10
Eighty years and 89 seconds: It’s time to fight against midnight
In the 80th year of the nuclear age, with just 89 seconds left on the Doomsday Clock, every nuclear challenge is trending in the wrong direction.
In less than a month, the US and Russia will have no legally binding measures constraining each other's strategic nuclear arsenals. 60 years of work to prevent nuclear war between Washington and Moscow is being effectively abandoned. My take on what to do next: thebulletin.org/premium/2025...
05.01.2026 18:58 — 👍 3 🔁 0 💬 0 📌 0
People have a right to know about global threats. That's why the Bulletin exists. But we need your help.
At the Bulletin, we believe everyone has a right to know about global threats—because they endanger us all.
At a time when disinformation spreads faster than truth, your support helps nonprofit newsrooms like the Bulletin deliver reporting the world depends on.
Give today: igfn.us/form/tE7vTw
30.12.2025 14:30 — 👍 18 🔁 6 💬 0 📌 0
It’s the gold standard of US climate research. Contrarians could write the next one.
Researchers who have downplayed the threat of global warming have been asked to author the next National Climate Assessment.
It is hard to overstate how wildly inappropriate it is to replace a National Climate Assessment--A process normally involving hundreds scientists, significant public and expert input, and US government-wide coordination--with five climate skeptics using AI.
www.eenews.net/articles/its...
22.12.2025 17:58 — 👍 56 🔁 11 💬 4 📌 4
Alex Wellerstein joins the Bulletin
The Bulletin is proud to welcome Alex Wellerstein as a new Senior Fellow. In this role, he will work with the Bulletin’s editorial team on historical
The Bulletin is excited to welcome @wellerstein.bsky.social as a new Senior Fellow!
Alex has written many pieces for the Bulletin over the years, including some of our most popular articles.
thebulletin.org/2025/12/alex...
20.12.2025 22:18 — 👍 47 🔁 5 💬 4 📌 0
Mine was 83. 😬
17.12.2025 20:40 — 👍 2 🔁 0 💬 0 📌 0
Exactly 80 years ago, scientists who helped build the world's first atomic bomb published a "bulletin."
That was the beginning of the Bulletin, our nonprofit newsroom.
To mark the anniversary—in true Bulletin fashion—we published a magazine that looks to the future: buff.ly/REJsWIF
10.12.2025 20:01 — 👍 21 🔁 9 💬 2 📌 1
Eighty years and 89 seconds: It’s time to fight against midnight
In the 80th year of the nuclear age, with just 89 seconds left on the Doomsday Clock, every nuclear challenge is trending in the wrong direction.
🎉 Today is the 80th anniversary of the first issue of the @bulletinatomic.bsky.social. In this piece, @atomicbell.bsky.social reflects on how we arrived at 89 seconds to midnight & what's next.
We appreciate the Bulletin's persistent & ever-timely thought leadership.
thebulletin.org/premium/2025...
10.12.2025 16:18 — 👍 2 🔁 2 💬 0 📌 0
When it all comes crashing down: The aftermath of the AI boom
AI has buoyed the stock market and a struggling US economy but warning signs indicate a bubble that everyone will pay for when it bursts.
Silicon Valley has placed a trillion-dollar bet that gen AI can transform the global economy and pave the way for AGI. But warning signs show the marketing hype has vastly overrated what current AI tech can achieve, creating a bubble with growing costs when it pops, writes @jeremyhsu.bsky.social.
05.12.2025 14:43 — 👍 22 🔁 9 💬 3 📌 6
So excited about this!!!
20.11.2025 02:40 — 👍 3 🔁 0 💬 0 📌 0
On October 29th, Donald Trump announced on his social media site, Truth Social, that he had instructed the Department of War (formerly the Department of Defense) to “start testing our Nuclear Weapons…
What you should know about nuclear weapons
What would happen if Chicago were the target of a nuclear bomb?
Jeffrey Lewis @armscontrolwonk.bsky.social spoke to the Bulletin about what people should know about nuclear weapons—from basic terminology, to which nations have them, and what could occur when they're used.
10.11.2025 19:17 — 👍 24 🔁 16 💬 4 📌 1
This doesn't answer the question. Does the President want to test nuclear weapons, their delivery systems, or both????
30.10.2025 20:23 — 👍 4 🔁 4 💬 1 📌 0
Trump Is Very Confused About Nuclear Weapons
The president says he wants to resume nuclear testing but doesn’t seem to know why.
"Resuming nuclear testing looks weak and petulant, not strong and confident," writes Tom Nichols. "No American president should ever let the Kremlin get under his skin—especially not where nuclear weapons are concerned."
30.10.2025 03:58 — 👍 291 🔁 95 💬 25 📌 5
Now it's looking like he meant testing of nuclear delivery systems, but this is the kind of reckless imprecision we shouldn't have to tolerate from the person who has the sole authority to use these weapons.
30.10.2025 11:30 — 👍 2 🔁 0 💬 0 📌 0
No country in the world would benefit more from a return to nuclear testing than China. We barely escaped the last arms race. If Congress doesn't move to stop Trump, we are fully committing to another we may not survive.
30.10.2025 01:34 — 👍 12 🔁 5 💬 2 📌 3
Founded by Nelson Mandela, we are independent global leaders working together for peace, justice, human rights and a sustainable planet.
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President @ucs.org. Previously: USDOT, White House OSTP, @500womensci.bsky.social. Environmental engineer. Mom. Cyclist. Public Transit Enthusiast. Views my own. She/her.
Writer, journalist, filmmaker, professor. Pro-democracy advocate: Not capitulating. Author of Lee Harvey Oswald book, The Gunman & His Mother. Writing/publishing America, America on politics and society: America.substack.com
D.C.-area and worldwide weather news from The Washington Post.
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Director, Global Risk at Federation of American Scientists, former Sr. Dir NSC, Bulletin of Atomic Scientists (doomsday clock setter). Pope of Chili Town. No #manels, Yankees/Gunners.
Nuclear historian. Professor at Stevens Institute of Technology. Visiting researcher at Nuclear Knowledges program, Sciences Po (Paris). Author of THE MOST AWFUL RESPONSIBILITY (2025). Creator of NUKEMAP. Blogging at https://doomsdaymachines.net.
Fellow at the Carnegie Endowment for International Peace | KCL PhD | Nukes and nonpro | RT≠endorsement
I've been working on national security in Washington for over 40 years. Government, think tanks and philanthropy. Now retired, I still write, lecture and do media interviews. And I'm still learning. On Substack at: joecirincione.substack.com
Nuclear weapons and intelligence history.
davidehoffman.com — The Oligarchs, The Dead Hand, The Billion Dollar Spy, and Give Me Liberty. Washington Post 2023 editorial series “Annals of Autocracy”: https://wapo.st/3K8LVNd
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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