Join the Bulletin and the Chicago Council on Global Affairs for a discussion on nuclear power, geopolitics, and energy security on March 30. Learn more and register here: globalaffairs.org/events/nucle...

Bulletin Science and Security Board member Inez Fung discusses global warming concerns and solutions that factored into the 2026 Doomsday Clock conversation, from her point of view. ⬇️

Kathryn Olmsted, a history professor at the University of California Davis, talks to Bulletin editor Dawn Stover @dawnstover.bsky.social about how American conspiracy theories have changed since World War I, and what they can tell us about US culture.

The supposed national security threat that the Trump administration has used as an excuse to try to kill five energy projects that would provide cheaper, cleaner electricity to 20 states and Washington D.C. is largely a mirage, writes Jessica McKenzie @jessimckenzi.bsky.social.

The Bulletin is proud to announce Ethan Beaty as the 2025 recipient of the Leonard M. Rieser Award for his article, "AI misinformation is threatening emergency communications. Here's how to fix that."

AI brings a significant possibility of elevating nuclear escalation risks. Herbert Lin outlines three hypothetical, yet plausible, scenarios where AI could have a role in nuclear escalation: Taiwan, a US-North Korean confrontation, and a NATO exercise triggering a crisis in Europe.

"The question: Is it better to ignore the paper, and hope it dies in obscurity, or to tackle the disinformation head on?" In this case, Bulletin climate editor Jessica McKenzie @jessimckenzi.bsky.social tackles it.

From former Bulletin climate editorial fellow Chad Small @smallthoughts.bsky.social. ⬇️

I wrote about government's track records of suppressing climate change intelligence assessments last month for @thebulletin.org, and how this practice runs the risk of aligning with climate denialism efforts (like Gabbard's) in the U.S. thebulletin.org/2026/02/deny...

If NIH prioritizes human-based science in its ongoing overhaul of biosafety policies, the oversight system that has evolved for review of a wide-swath of biological research could atrophy, write biosafety experts David Gillum, Megan Shoff, and Randy A. Albrecht.

What has President Trump achieved with the war in Iran? "The United States may have taken away some of Iran's nuclear capabilities—though crucially not its stockpile of highly enriched uranium and nascent bomb-making ability," writes Richard Nephew @richardmnephew.bsky.social.

"The second Trump administration is taking its hostility to climate science to new levels," writes Rachel Cleetus, senior policy director for the Climate and Energy program at @ucs.org. Recently released government documents show how the admin is seeking to replace scientific facts with propaganda.

"My concern with conspiracy theories is when you have governments acting on them or using them as justification for rights-violating behaviors. That's where the biggest concerns come from, because governments have a monopoly on legitimate power." —Joseph Uscinski

🥗Spend your lunchtime with us! In tomorrow’s Wednesday Seminar, Alexandra Bell, president and CEO of @thebulletin.org, will discuss recent developments in nuclear proliferation, arms control, and strategy. 📡Bookmark the livestream https://bit.ly/410Baoz

The war in Iran shows that lethal long-range drones are rapidly becoming the newest frontier in an ongoing arms race, writes Dominika Kunertova, a research scholar at @belfercenter.bsky.social.

It might seem like conspiracy theories are everywhere today, and that people are more inclined to believe them than in the past. But that isn't true, says political scientist Joseph Uscinski, in an interview with Bulletin contributing editor Dawn Stover @dawnstover.bsky.social.

"As energy historian Daniel Yergin has warned, this conflict could represent the biggest disruption in oil production in history. The desire for energy diversification will only intensify in its wake."

Despite the announcement of an increase in the French nuclear arsenal, the underlying spirit of strict sufficiency—maintaining only what is necessary to protect France's vital interests—remains present in Macron's speech, writes Astrid Chevreuil of @csis.org.

In our upcoming Wednesday Seminar, Alexandra Bell will discuss recent developments in nuclear proliferation, arms control, and strategy. Bell is the president and CEO of @thebulletin.org. 🗓️3/18 at noon ET 📍MIT community can join in person at E40-496 📡Bookmark the livestream https://bit.ly/410Baoz

"AI social networks are not merely places where AIs interact," writes Roman V. Yampolskiy. "They are environments in which agents can compound their capabilities and coordinate at scale—and environments in which humans can lose control."

The latest Nuclear Notebook takes a look at the United States, which has embarked on a wide-ranging nuclear modernization program. Read more from @nukestrat.bsky.social, @mattkorda.bsky.social, @elianajjohns.bsky.social, and @mknight.bsky.social of @scientistsorg.bsky.social. ⬇️

On the first day of the attacks on Iran, a school in Iran was bombed, killing more than 175. Nobody knows for sure what happened, and nobody wants to take responsibility. Gary Marcus @garymarcus.bsky.social thinks there's a "good chance" that the incident stems from the use of AI.

From conspiracy theories to AI, from wartime misinformation campaigns to the anti-vaccine movement, the Bulletin's March magazine takes a deep dive on disinformation today: buff.ly/z7ZnFEm

New @thebulletin.org: "Knowledge is rarely, if ever, advanced through censorship...Removing the climate science chapter advances neither science nor the law. It only deprives judges of a resource needed to do their jobs."

I am quoted in @economist.com defense editor Shashank Joshi's (@shashj.bsky.social) latest on whether special forces could steal Iran's highly enriched uranium. (Alongside the great @matthew-bunn.bsky.social)

"Thyroid cancer used to be rare in Fukushima Prefecture, with one case in a million. After five rounds of screening, the incidence rate is now 400 cases out of 380,000 people—1,000 times higher than before the disaster." —Thomas A. Bass

"The disaster at Three Mile Island could be dismissed as human error. The disaster at Chernobyl (as it was then spelled) could be dismissed as the product of human error and inferior Soviet technology. Fukushima was different."

Marking the 15th anniversary of the disaster @maximepolleri.bsky.social argues that to say that “No one died from radiation at Fukushima” fails to grapple with questions about low-dose radiation, excludes catastrophe-related deaths, and discounts the way that lives have been disrupted.

15 years ago today, the world watched Fukushima-Daiichi being shattered. As an editor, I'm seeing the narrative shift from "safety at all costs" to "tripling capacity" (as seen at yesterday's Paris Nuclear Energy Summit). But is the nuclear disaster over? (1/n) #Fukushima15 #NukeSky #NuclearEnergy

"Knowledge is rarely, if ever, advanced through censorship." David L. Faigman, Erwin Chemerinsky, Ben Santer, & Lynn Nadel on the recent removal of the climate science chapter in the Federal Judicial Center’s Reference Manual on Scientific Evidence.

Three nuclear reactors melted down at the Fukushima Daiichi power plant on March 11, 2011. That was 15 years ago. What has happened since then? @thebulletin.org explores.

"Most of us fishermen are calm now and don't complain, but even if we spoke up, our voices wouldn't reach all the way to Tokyo. The government never loses [...] They never take responsibility for what they have done. No one outside is talking about Fukushima, but we have not recovered." —Haruo Ono

In conflicts, "the capacity to act with AI-enabled tactical and operational speed should not be confused for solid strategy and clear political goals," writes Ian Reynolds @ijreynolds.bsky.social of @stanfordcisac.bsky.social.

"A dangerous precedent is being set in Trump's new Middle East war: targeting critical and highly vulnerable desalination plants that provide vital freshwater resources for the region," writes Peter Gleick @petergleick.bsky.social.

Deploying US troops to seize or destroy Iran's highly enriched uranium would bring significant chemical, logistical, and tactical hurdles, writes Bulletin nuclear editor François Diaz-Maurin @francoisdm.bsky.social.

"As early as 1983 the US intelligence community warned in a secret report that 'disruption of desalination facilities in most of the Arab countries could have more serious consequences than the loss of any other industry or commodity.'" @petergleick.bsky.social in @thebulletin.org

🚨 JUST IN: I wrote about Trump's self-induced dilemma of sending US troops to seize or destroy Iran's highly enriched uranium. #Iran #Isfahan #uranium #Trump #nuclearweapons #nukesky @thebulletin.org

“...in conflicts, the capacity to act with AI-enabled tactical and operational speed should not be confused for solid strategy and clear political goals,” writes @ijreynolds.bsky.social in a piece for @thebulletin.org on how the use AI in the military raises fundamental questions.

What does a nuclear disaster look like 15 years later? Thomas A. Bass reports for the Bulletin in a new piece supported by @pulitzercenter.org.

Bulletin Science and Security Board member Jon B. Wolfsthal @jonatomic.bsky.social discusses the nuclear weapons issues that factored into the 2026 Doomsday Clock decision. ⬇️

Fifteen years later, the lived experience of people resettling the evacuation zone reveals an ongoing disaster at Fukushima—one filled with radioactive hot spots, injustices, and stigma.

🚨 JUST IN: Fifteen years later, the lived experience of people resettling the evacuation zone reveals an ongoing disaster at Fukushima—one filled with radioactive hot spots, injustices, and stigma. This story was supported by the @pulitzercenter.org. #Fukushima #nukesky @thebulletin.org

The legacies of physicists Hans Bethe and Richard Garwin are "important to issues of nuclear war and peace, to history, and to the Bulletin readership," writes Herbert Lin, a senior research scholar and research fellow at Stanford University.

"Uncertainty cuts both ways. The future is unknown, but it has tails on both sides, and so you shouldn’t assume that uncertainty just means there’s a good chance it won’t be as serious or severe." My latest @thebulletin.org interview with climate scientist and meteorologist Richard Somerville:

On Monday, French President Emmanuel Macron announced that France will be increasing the number of its nuclear warheads—as well as ceasing public disclosures of warhead totals, a break with decades of transparency. Read more from Héloïse Fayet @hfayet.bsky.social. ⬇️

The United States and Israel have launched thousands of missiles targeting Iran's government and military. Iran's counterattacks have struck Israel and other US-allied countries. Bulletin editors compiled clips shared by those experiencing the escalating war firsthand.

Climate change is a "moral and ethical issue," says climate scientist Richard Somerville, professor emeritus at @scrippsocean.bsky.social. "The consequences of what we do will be for, not only our future kids, but for all of the world," he says in an interview with @jessimckenzi.bsky.social.

President Trump wants a regime change in Iran. "As history shows, when it comes to forcibly changing the government of a foreign adversary, an initial victory can frequently be illusory," writes Bulletin editor Matt Field @mattyfield.bsky.social.

What’s the current state of Iran’s nuclear capabilities since the US launched military strikes? The @thebulletin.org’s Alexandra Bell joins me for a frank & sobering discussion of how the Trump Regime has deprioritized nuclear safety in favor of an unchecked offensive. youtu.be/aVWuvpBzPJc?...

On Monday, the Bulletin hosted an expert conversation on the current state of the conflict in Iran. You can watch the full discussion on our YouTube channel. ⬇️