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Bulletin of the Atomic Scientists
@thebulletin.org
9.7K followers 88 following 700 posts
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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The role of the United States in global affairs is changing dramatically.

The September 2025 magazine issue of the Bulletin examines different facets of the NEW, new world order that Donald Trump has wrought in his second presidential term: buff.ly/bNVQEE2
Bulletin magazine cover with the title: "The NEW new world order." The photo-illustration shows Donald Trump walking, about to pump his fist and looking like he's dancing, on a chess board surrounded by knocked-over chess pieces.
September 4, 2025 at 2:26 PM
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We're holding our first-ever short fiction contest. Entries can be of any genre and will be judged by science fiction author Kim Stanley Robinson. First-place wins $3,000, and runners-up $500 each.

Don't miss the Sept 30 deadline!

thebulletin.org/write-before...
August 31, 2025 at 9:18 PM
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The newest Bulletin magazine edition arrives next week. Subscribe today: thebulletin.org/magazine-sub...
August 30, 2025 at 7:01 PM
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Join the Bulletin of the Atomic Scientists and a panel of experts for a discussion of a new biography of Manhattan Project scientist Luis Alvarez and the challenges and consequences of scientific discovery.
us02web.zoom.us/webinar/regi...
August 19, 2025 at 1:34 PM
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"At this point, the United States doesn’t need new nuclear deals so much as sound nuclear non-proliferation principles."
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August 16, 2025 at 9:18 PM
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"It may be too late to block Iran from making bombs, but now is an excellent time to change course on the question of how “peaceful” nuclear fuel-making is."
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August 15, 2025 at 10:18 PM
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Thank you to the American Society of Magazine Editors for this recognition.

You can read the January 2024 magazine issue, with evergreen wisdom on actions citizens can take to help reduce major global threats, here: thebulletin.org/magazine/202...
Magazine cover showing an illustration of Albert Einstein as Uncle Sam, with the Doomsday Clock on his hat and his finger pointing at the reader. The title reads: What you can do to turn back the Clock." The Bulletin's logos and "January 2024" are in the corners.
August 13, 2025 at 8:42 PM
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Thank you to @ploughshares.bsky.social and @nti.org for inviting the Bulletin to fold paper cranes and honor the victims of nuclear weapons this week.

You can read more about Sadako Sasaki's story, and learn how to fold cranes of your own, here: www.cranesforourfuture.org #CranesForOurFuture
A man and a woman stand holding folded paper cranes in front of a sign that says "Bulletin of the Atomic Scientists" A hand holds a folded origami crane, made with paper with a maple leaf pattern.
August 9, 2025 at 4:37 PM
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Support the Bulletin—in style.

All Bulletin products are made-to-order using eco-friendly inks—avoiding overproduction and waste. And 100% of proceeds support our work to reduce existential threats.

Browse the collection: thebulletin.threadless.com
June 29, 2025 at 9:35 PM
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Disinformation is spreading faster than ever—and threatening lives.

For nearly 80 years, the Bulletin has cut through the noise with science-first reporting.

We don’t sell data or chase clicks—we serve the public.

Support our work: igfn.us/form/tE7vTw
June 26, 2025 at 4:28 PM
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Israel's military operation against Iran dramatically escalated on Saturday and seemed to pursue a broader objective: regime change.

thebulletin.org/2025/06/isra...
Israeli Air Force F-15I and F-35I fighter jets fly alongside a US B-52 bomber during a joint exercise on March 4, 2025.
June 14, 2025 at 9:18 PM
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Gear up for a safer future and support the Bulletin's mission with every purchase from our Threadless store.

All products are printed on-demand with a commitment to sustainability. Check it out here: bit.ly/3BKdJXC
May 28, 2025 at 5:05 PM
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Fighting a pandemic is hard. Doing it without losing public trust is even harder.

The Bulletin's May magazine issue is devoted to lessons learned from COVID-19—and how to stop or constrain the next pandemic.

Explore the new edition: thebulletin.org/magazine/202...
Magazine cover with a photo-illustration of the planet Earth with a PPE facemask on. The title reads "How to stop the next pandemic." Bulletin logos are in the corners.
May 13, 2025 at 1:44 PM
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What is the current status on nuclear negotiations between Iran and the United States?

Join the Bulletin for an expert virtual discussion this Wednesday, May 14, 2025 at 11:00 a.m. EDT / 10:00 a.m. CDT.

Register here: bit.ly/3GKBPDK
Background is comprised of half an image of an Iranian flag and half a US flag. Text reads: Virtual event. Iran Update: What happens now? Join the Bulletin for an expert discussion on Wednesday, May 14, 2025 at 11:00 a.m. EDT / 10:00 a.m. CDT.
May 11, 2025 at 7:55 PM
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How close the world is to crossing so-called "tipping points" is a matter of vigorous scientific debate.

The Bulletin's March magazine, published today, is dedicated to this debate.

The edition's introduction by @jessimckenzi.bsky.social is available to all readers. bit.ly/4ilW0pn
Magazine cover with an illustration of a globe teetering on top of a red triangle, with text next to it: "The Tipping Points issue." The logo for the Bulletin of the Atomic Scientists is in the corner.
March 12, 2025 at 2:43 PM
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On Tuesday, the Bulletin’s Science and Security Board set the #DoomsdayClock at 89 seconds to midnight.

Read the Board's statement on their reasonings and recommendations: thebulletin.org/doomsday-clo...

Watch the announcement, with remarks and a Q&A: youtube.com/live/oqifSCv...
January 29, 2025 at 11:00 PM
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Today, the Bulletin’s Science and Security Board set the #DoomsdayClock at 89 seconds to midnight.

Read the full statement explaining their reasons, concerns, and recommendations: bit.ly/3Eg8S1r
White text on black background: "In setting the Clock one second closer to midnight, we send a stark signal: Because the world is already perilously close to the precipice, a move of even a single second should be taken as an indication of extreme danger and an unmistakable warning that every second of delay in reversing course increases the probability of global disaster." —The Science and Security Board of the Bulletin of the Atomic Scientists. The logo is in the bottom right corner, with the phrase "It is 89 seconds to midnight."
January 29, 2025 at 2:16 AM
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Belligerence via artificial intelligence, drones, and hypersonic weapons, among other threats, demonstrate the rising danger posed by disruptive technologies this past year.

Read more in the #DoomsdayClock statement sidebar on disruptive technologies: bit.ly/42xhvhW
White text on black background: "Increasing chaos, disorder, and dysfunction in the world’s information ecosystem threaten society’s capacity to address difficult challenges, and it is clear that AI has great potential to accelerate these processes of information corruption." —The Science and Security Board of the Bulletin of the Atomic Scientists. The logo is in the bottom right corner, with the phrase "It is 89 seconds to midnight."
January 28, 2025 at 11:32 PM
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Humanity continues to face threats from infectious disease, proliferation of high-risk research laboratories, the combination of AI with biological research, and offensive bioweapons programs.

The #DoomsdayClock statement sidebar on biological threats: bit.ly/40Qjwoj
White text on black background: "Geopolitical tensions, skirmishes, and outright war all disrupt (and in some cases, destroy) health care and public health infrastructure, increasing the risk that diseases will spread—even without the use of biological weapons. But nations known to possess active offensive biological weapons programs (i.e., Russia and North Korea) could deploy these weapons at any time." —The Science and Security Board of the Bulletin of the Atomic Scientists. The logo is in the bottom right corner, with the phrase "It is 89 seconds to midnight."
January 28, 2025 at 8:24 PM
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In 2024, manifestations of a changed climate "continued to be felt increasingly across the world, even as the clean-energy transition continued to gather pace against formidable headwinds."

The #DoomsdayClock statement sidebar on climate change:
bit.ly/3EhHqjN
White text on black background: "Major climate indicators showed 2023 to be the warmest year in the 174-year observational record, with the highest measured level of ocean heat content, the highest global mean sea level on record, and the lowest measured Antarctic sea-ice extent—and 2024 is on track to be even warmer." —The Science and Security Board of the Bulletin of the Atomic Scientists. The logo is in the bottom right corner, with the phrase "It is 89 seconds to midnight."
January 28, 2025 at 7:30 PM
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"There were no calamitous new developments last year with respect to nuclear weapons—but this is hardly good news." Longstanding concerns continued or were amplified in 2024.

The Science and Security Board in their #DoomsdayClock sidebar on nuclear risk: bit.ly/40yV09Y
White text on black background: “Long a driver in the effort to prevent nuclear weapons use, reduce nuclear risks, and pursue nuclear arsenal reductions, the United States has embarked on the world’s most expensive nuclear modernization, and the 2024 election results suggest the United States will pursue a faster, more expansive nuclear investment program. [...] The United States is now a full partner in a worldwide nuclear arms race." —The Science and Security Board of the Bulletin of the Atomic Scientists. The logo is in the bottom right corner, with the phrase "It is 89 seconds to midnight."
January 28, 2025 at 6:07 PM
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The 2025 #DoomsdayClock announcement is today at 10:00am EST / 1500 GMT.

Watch the livestream on YouTube, Facebook, TikTok, or our website: bit.ly/411huC5
An image of the top of a stylized analog clock, the Doomsday Clock, with a wide black border on top, solid black circles instead of numbers, and the tops of the minute and hour arms visible, close to midnight.
January 28, 2025 at 1:07 PM
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Do you have a question about the #DoomsdayClock?

Reply with your question below and it may be asked at tomorrow's press conference.

Learn more about the announcement: bit.ly/42syySj
To the left, text reading: "Join us for the 2025 Doomsday Clock announcement. The announcement will be held on Tuesday, January 28th at 10:00am EST/1500 GMT. Watch live on the Bulletin's website, Facebook page, or YouTube channel." To the right, a black and white photograph of a hand reaching out and moving the minute hand of a large, simply-styled analog clock with black circles instead of numbers - the Doomsday Clock.
January 27, 2025 at 7:22 PM
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What is the #DoomsdayClock? Here's an answer from members of the Bulletin's Science and Security Board, which determines the Clock's time.

Watch the 2025 Doomsday Clock announcement on Tuesday, January 28th at 10am EST / 1500 GMT, and learn more here: thebulletin.org/doomsday-clock
January 26, 2025 at 7:10 PM
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The Bulletin's Independent Task Force on Research with Pandemic Risks has released a new report on the benefits and risks of research that could source a large outbreak, or even a pandemic.

Read "A Framework For Tomorrow’s Pathogen Research" here: thebulletin.org/pathogens-pr...
A stylized logo of a microscope over text reading "A framework for tomorrow's pathogen research." Abstract design goes down each side of the image.
February 29, 2024 at 4:07 PM