In November, just before I went to see Jerry Brown at the annual meeting of the Bulletin of the Atomic Scientists, some eleven thousand climate experts signed a statement declaring âclearly and unequivocally that planet Earth is facing a climate emergency.â At eighty-one, Brown, the former governor of California, was retired, but not really, having committed himself to fending off environmental disaster. Recently, he had testified before a House subcommittee, calling an attack by President Trump on Californiaâs auto emissions rules âjust plain dumb, if not commercially suicidal.â A month before that, heâd announced the creation of the California-China Climate Institute, a bilateral research and training initiative âto spur further climate action.â And just before finishing his last term as governor, heâd signed on as the executive chair of the Bulletin, which was eager to stake out territory in the climate fight.
Iâd arranged to interview Brown about his choice to join the Bulletin, a nonprofit magazine founded in Chicago in 1945 by conscience-stricken alumni of the Manhattan Project. The Bulletin covers all things nuclear and is best known for its annual Doomsday Clock announcement, which draws on expert opinion to report just how close we are to the âmidnightâ of man-made apocalypse. But the publicationâs original remitâto help âformulate the opinion and responsibilities of scientistsâ and âeducate the publicâ about the many âproblems arising from the release of nuclear energyââhas broadened considerably. It now devotes equal attention to the threat of the climate crisis, including in the setting of the clock.
In this regard, the Bulletin and a post-gubernatorial Brown were an ideal match. The meeting I attended, at the regal University Club in downtown Chicago, was Brownâs second with the science and security board, a group of subject-matter experts who set the clock and advise the editorial staff. (The Bulletin also has two other boards: the governing board, a corporate and philanthropic fundraising body, and the board of sponsors, which boasts thirteen Nobel laureates.) A few hundred people arrived, palling around and getting ready to talk all things apocalypse. The dress code for the event had called for business attire, but Brown turned up in crumpled slacks and a navy-blue sweaterâa suitcase screwup, he explained.
Why the Bulletin? I asked. âNumber one is, of course, the reduction of the nuclear threat, but climate is another huge threat to humanity,â he said. âAnd the Bulletin, by linking the two threats, can increase public awareness, get people thinking about the big threats that humanity faces.â Brown complained, in his jocular, pugnacious way, that the American news mediaâs âservitude to the concept of the news of the dayâ is partly to blame for public ignorance about climate change. He asked me repeatedly, âHow can journalism cover something as diffuse and general and gradual as climate change?â As we chatted, searching for answers, I thought of the untold amount of carbon weâd all combusted to get to Chicago.
I next saw Brown at the opening luncheon, in the buffet line among Bulletin funders and fans. The crowd resembled that of a classical-music concert: old, white, intellectual. The day included three sets of workshops, led by eminent scientists and policy wonks, then a closing plenary session and dinner banquet at Chicagoâs Palmer House, a grand hotel dating to the late nineteenth century. At the dinner, Brown delivered an energetic, free-flowing speech. âThe worse it is, the more excited I am,â he said, the it being our current geopolitical, nuclear, and climate morass. âLetâs get it done!â
That second itâthe avoidance of total destructionâaptly distilled the Bulletinâs mission. Since the atrocities of Hiroshima and Nagasaki, the magazine has tried to convey the grave danger weâve imposed on ourselves. Today, though the possibility of nuclear war remains real, the climate crisis feels just as daunting and consequential. Environmental scientists know this, as do journalists who report on global warming. Yet the Bulletin of the Atomic Scientists may be the only publication to cover climate change with an approach that is explicitly existential.

What time is it? At the 2020 announcement of the Doomsday Clock, the Bulletinâs leaders declared us closer than ever to midnight. Lexey Swall Photography / Bulletin of the Atomic Scientists
In 2017, during a seemingly endless, ever-escalating row between President Trump and North Korean leader Kim Jong-un, the Bulletin of the Atomic Scientists was permanently tabbed in my browser window. What some were calling a new âNorth Korean nuclear crisisâ wasnât really new or even a crisis so much as the crackling of a rather constant fire. Still, as a Korea watcher with family on the peninsula, and given the âstatesmenâ involved, I felt frightened and looked to the Bulletin as a vital source of news and commentary. The magazine had, after all, invented the nuclear beat.
From the very first issue, a slight, mimeographed newsletter published on the fourth anniversary of the attack on Pearl Harbor, the Bulletin appealed to America and the rest of the world to eliminate nuclear weapons and establish âefficient international controlâ of atomic energy. Progress âwill be useless if our nation is to live in continuous dread of sudden annihilation,â the editors said at a conference in Moscow. âWe can afford compromises, disagreements, or delays in other fieldsâbut not in this one, where our very survival is at stake.â A few years on, the Bulletin published the text of a speech by Albert Einstein, delivered to journalists at the United Nations, in which he asked why global cooperation hadnât yet staved off the threat of apocalypse. Perhaps it would be different, he suggested, if the atom bomb were not âone of the things made by Man himself.â Einstein later founded the Bulletinâs board of sponsors.
The Bulletin evolved from a newsletter into a magazine, headquartered at the University of Chicago, and Martyl Langsdorf, a landscape painter and the wife of a Manhattan Project alumnus, designed a symbolic cover: an analog clock, set at 11:53pm, to represent the imminence of our self-destruction. In 1949, when the Soviet Union tested its first nuclear device, Eugene Rabinowitch, the Bulletinâs coeditor, decided to animate Langsdorfâs clock, winding it four minutes closer to midnight. It has ticked forward and backward ever sinceâthrough the proliferation of ballistic missiles; the catastrophes at Three Mile Island, Chernobyl, and Fukushima; and the adoption of and American withdrawal from the Intermediate-Range Nuclear Forces (INF) Treaty. The Nuclear Notebook, a research column of hair-raising erudition, has appeared in every issue since May 1987 and is second only to the Doomsday Clock in Bulletin influence. Each Notebook installment analyzes a category of stockpileâtactical nuclear weapons, for instance, or the Chinese nuclear arsenalâdown to the quantity and types and locations of various arms and fissile materials.
The interests of the magazine have always overlapped with those of environmentalists. Early Bulletin scientists expressed a desire to make atomic energy a clean, limitless alternative to fossil fuels. That did not, of course, come to pass; more apparent were various kinds of long-term damage, from nuclear tests to plant meltdowns to radioactive waste buried on- and offshore, all of it documented in the Bulletin. Thereâs still no consensus on nuclear power. At the annual meeting, Robert Socolow, a member of the science and security board and a Princeton professor emeritus, said in a presentation, âIâm still going back and forth on nuclear energy, because of the coupling of nuclear power and nuclear weapons.â There is always âsome probabilityâ of disaster, he added.
Atomic energy, in any case, never came close to rivaling fossil fuels, and the subject of climate change appeared in the Bulletin as early as November 1961. âClimate to Order,â an article-cumâthought experiment by H.E. Landsberg, a German climatologist, described geoengineeringâthat is, hacking the atmosphere (reflecting sunlight, injecting chemicals into the stratosphere, etc.)âavant la lettre. In theory, Landsberg wrote, it would be great to customize our environment, but âWhen we are changing the climate of the whole world, a mistake could be disastrous.â In 1970, the Bulletin ran another piece on geoengineering, this time in relation to âpolar iceâ and âmanâs inadvertent influences on global climate.â By 1972, a long, poetic account of the loss of forests and arable land would warn, âThere is plenty of evidence that man is the principal cause of this change.â
When I visited Rachel Bronson, the CEO and president of the Bulletin, in the magazineâs Chicago offices, she plucked a bound library volume from her shelf and opened it to February 1978. âIs mankind warming the Earth?â William W. Kellogg, a meteorologist, queried in the magazineâs first climate-change cover story. âThe answer is, I believe, an unqualified âyes.âââ Kelloggâs article might have been written today, so salient are its arguments against delayed action and the conflating of extreme weather and atmospheric transformation. He included a message to colleagues who âmaintain that we should not publish any conclusions about the response of the climate to anthropogenic influences until we have done more homework,â expressing his disagreement âwith such a conservative and noncommunicative attitude because the stakes are so great, the issues so fundamental to the future of society and most of all because some decisions are upon us that depend on every scrap of insight we can muster.âÂ
By the end of the Cold War, most scientists were aware of the dangers of climate change and its relation to atomic and geopolitical concerns. Around the time Bill McKibben published The End of Nature, the first mass-market account of global warming, in 1989, the Bulletin was running pieces on the science of climate change âside by side with heated denials that global warming posed any threat at all,â historians David Kaiser and Benjamin Wilson observe in a special seventieth-anniversary issue of the Bulletin. The magazine also recast the debate over nuclear energy âamid new apprehension about greenhouse gas emissions and implications for global warming.â Len Ackland, the editor from 1984 to 1991, told me that it became clear âwe needed to address longer-term environmental dangers.â To that end, he commissioned new artwork from Langsdorf: in her cover illustration for the October 1989 issue, the circle of the clock encloses a blue-and-white map of the world, the minute and hour hands radiating out from the North Pole. In 1992, the Bulletin published a major speech by Mikhail Gorbachev that set out environmental priorities for a post-Soviet world: âThe prospect of catastrophic climatic changesâmore frequent droughts, floods, hunger, epidemics, national-ethnic conflicts, and other similar catastrophesâcompels governments to adopt a world perspective and seek generally applicable solutions.â
The Bulletin has vacillated in style over time, toggling between academic journal and science magazine, but has always maintained a certain seriousness. When I spoke to Bronson, she told me that tradition and expertise are no longer enough. âIn the moment of populism in which weâre now operating, weâd better inform the populace,â she said. âOur power will come from having an educated and devoted following thatâs larger than it is right now.â Recently, the Bulletin has adjusted its idioms; leaned more on interviews, explainers, personal essays, and multimedia; and stretched beyond an author base of older white male technocrats from Europe and the United States. Thereâs the Voices of Tomorrow column, which ran a moving essay by four teenage activists, including Isra Hirsi, Congresswoman Ilhan Omarâs daughter: âAdults wonât take climate change seriously. So we, the youth, are forced to strike.â Thereâs elegant multimedia reportage, such as deputy editor Dan Drolletteâs âTilting toward windmills,â about a test wind farm on Block Island, Rhode Island. And thereâs refined polemic: for example, âLet science be science again,â by Yangyang Cheng, a Chinese physicist based in Chicago, on science advocacy in the age of Donald Trump. A popular video series, âSay What? A clear-eyed look at fuzzy policy,â produced by multimedia editor Thomas Gaulkin, demonstrates that, even though the Bulletin is nonpartisan, itâs religiously pro-science.
âSome decisions are upon us that depend on every scrap of insight we can muster.â

Ticktock: Martyl Langsdorf, a landscape painter and the wife of a Manhattan Project alumnus, designed a symbolic Bulletin cover: an analog clock that would represent the imminence of our self-destruction. That clock would become the magazineâs visual touchstone. Courtesy Bulletin of the Atomic Scientists
In recent years, the Bulletin website has more than quintupled its traffic, from about 42,000 visits per month in 2013 to 236,000 per month today. The audience remains small but is alsoâjudging from the comments section and social mediaâwell connected and atypically informed: scientists, graduate students, journalists, the kinds of people who subscribe to Scientific American and Foreign Affairs. In response to a recent article on the Intergovernmental Panel on Climate Change that debunked the supposed coming of a âlittle ice age,â commenter Cjones1 wrote: âYou forgot to mention that less solar radiation allows more cosmic radiation which effects [sic] cloud cover. The IPCC predictions have been less accurate than a bone throwing shaman.â Fifty-five people responded to this with a thumbs-up.
The Bulletin discontinued its print edition in 2008 but maintains a distinction between its paywalled bimonthly magazine and other articles. A yearly subscription costs eighty-six dollars and comes via Taylor & Francis, a profitable British publisher of scholarly books and journals. Since 2011, John Mecklin has served as the Bulletinâs editor in chief. He supervises six editors, spread out across the United States, who commission and write; seven other staff members handle administration, public relations, and fundraising. Collectively, they aim to grow the magazineâs readership, assign more illustrations, and invest in narrative and investigative journalism. âIâm in the process of commissioning a story right now, paying somebody two to three dollars a word,â Mecklin told me. âThe Bulletin is doing well financially, but I canât pay what The New Yorker pays somebody, or I canât do it for very many stories a year.â Most pieces are written for nothingââdonated,â as Mecklin put itâby experts with day jobs. One of Mecklinâs predecessors, Mark Strauss, recalled compensating at least one contributor with a Bulletin T-shirt.
When Mecklin took the job, climate represented just âa quarter or 30 percentâ of the magazine, he told me; itâs now âmore like 40 percent nuclear, 40 percent climate.â As he explained, âWhat has evolved and changed since Iâve been editor is that there are now three areas of focus: itâs nuclear, climate change, and this area we call disruptive technologiesââsuch as artificial intelligence and disinformationâa sort of âthreat multiplier of the first two.â Both Mecklin and Bronson described this expanded mission as logical and necessary, and in line with the Bulletinâs history of tackling the impacts of cutting-edge science.
When I listened in on a recent editorial meeting, via Skype, I was struck by the magazineâs simultaneously banal and illustrious character. The editors did what all editors do: they evaluated pitches and commissions, reviewed social media statistics (e.g., an âSUV shamingâ story, by contributing editor Dawn Stover, that was âdoing well on the interwebsâ), brainstormed story ideas, and planned coverage. But every so often, someone would refer to a famous politician or scientist (e.g., Siegfried Hecker, a Stanford physicist who has personally inspected North Koreaâs nuclear arsenal) not as a dream subject or occasional source, but as a friend and adviser to the magazine. On questions of climate, for instance, they might consult Elizabeth Kolbert, a Pulitzer Prizeâwinning New Yorker writer who sits on the science and security board. This is a publication with extraordinary history and reach. I thought of something Mecklin told me when we first spoke: âWe want to be read in the White House, at the Kremlin, and at the kitchen table.â
Among the prominent scientists closely involved with the Bulletin is Raymond Pierrehumbert, a lavishly bearded and tweeded physicist, not of the nuclear sort. He joined the magazineâs science and security board while across campus at the University of Chicago. He has since moved to Oxford, but remains heavily involved. In his work on âthe early Earthâ and planets around other stars, he applies the âsame physics we use to quantify the greenhouse effect on Earth,â he told me. âIf youâre a climate scientist or paleontologist, youâve studied the role of CO2 in the Earthâs past historyâyou know that what humans are doing to the Earthâs climate is truly disturbing.â For his part, he said, âIt would be irresponsible to stay in the lab.â Pierrehumbert once wrote a lively column on science and politics for Slate; he also contributed to the website RealClimate and appeared in a well-intentioned rap video titled âWe are climate scientists, Chicago style.â (Heâs better as a folk musician.)
In a recent cover story for the Bulletin, âThere is no Plan B for dealing with the climate crisis,â Pierrehumbert argues in dramatic language against geoengineering. To pursue that strategy, he writes, would commit âgenerations yet unborn to continuously run a mechanical process, over a time-span longer than the age of the pyramids.⊠And if our offspring donât, or simply canât, do so at some point in the future, then they will suffer the consequences of an unimaginably huge climate shock, accumulated over vast amounts of time.â
When I saw Pierrehumbert at the annual meeting, he was sheepish about the sin of his flight to get to Illinois. Yet he seemed energized by the company of his colleagues: fellow physicists, national-security experts, and politicians, including Jerry Brown, whom he admires. A few years ago, Pierrehumbert told me, heâd raised concerns with Brown about coal exports. If California allowed a proposed coal export terminal to be built, Pierrehumbert had said, it would increase demand in China, putting all of our carbon reduction goals in jeopardy. The problems were confounding, the answer frustratingly simple: âWe need to put fossil fuel companies out of business, or at least their traditional business,â Pierrehumbert told me. âWe will need to write down carbon to zero.â Brown heard him out, Pierrehumbert recalled, but âit was not on his radar.â
In November, Pierrehumbert had Californiaâs cap-and-trade program on his mind. A flaw of that and related markets, he told me, is that they apply an inaccurate equivalence âstandard, mass for mass,â to methane and carbon dioxide, thereby exaggerating the role of methane in global warming. But âif we reopen the debateââthat is, rejigger the math of cap-and-tradeââwe could lose the benefit on carbon dioxide. Itâs politically complicated. Iâm not sure itâs worth the risk,â he explained. âItâs too bad that Jerry Brown is no longer governor.â Even if he didnât act on everything Pierrehumbert told him about, he had, at least, listened. Gavin Newsom, the new guy in Sacramento, has yet to show up to a Bulletin meeting.
âWe want to be read in the White House, at the Kremlin, and at the kitchen table.â

Illustration by Gaby DâAlessandro
At the start of 2020, Bronson and her staff flew to Washington, DC, as they do every January, to announce to the world what time it is. At the press conference, livestreamed to maximize virality, Bronson wore a scarlet dress and stood at a podium bearing the Bulletinâs somber black-and-white logo. In 2018 and 2019, the clock was set at 11:58, the direst assessment by the science and security board since 1953, after both the United States and the Soviet Union tested hydrogen bombs. This year, alongside Brown; Mary Robinson, a former president of Ireland; and Ban Ki-moon, a former UN secretary-general, Bronson delivered an even grimmer report: the world was now a hundred seconds from apocalypseââcloser than ever to midnight,â as CNN would write.
The Bulletinâs accompanying statement, authored by Mecklin and addressed to the âleaders and citizens of the world,â is a seven-page, reader-friendly recitation of man-made horrors and suggested mitigations. Humanity is facing âa state of emergency that requires the immediate, focused, and unrelenting attention of the entire world,â it reads. The reasons are many. On the nuclear side, the US, Russia, and China retain their stockpiles; Iran retreated from international cooperation, in response to Americaâs withdrawal from their nuclear deal and its assassination of a top Iranian military commander; the INF Treaty is no more and other arms agreements are soon to expire. In terms of climate change, the US officially left the Paris Agreement; Brazil is allowing its precious rain forests to be destroyed; and greenhouse gas emissions are on the rise, zero-carbon rhetoric be damned. All this is made worse by a âcorrupted and manipulated media environmentâ in which truth, let alone scientific reality, becomes increasingly unknowable. Still, the Bulletin statement offers shards of hope. âClimate change has catalyzed a wave of youth engagement, activism, and protest,â it observes. If we multiply this âmass civic engagement,â it states, âthere is no reason the Doomsday Clock cannot move away from midnight.â
If the clock announcement invites sober reflection, itâs also an occasion to push for political action. Throughout its history, the Bulletin has balanced its journalistic mission with various forms of advocacy. As soon as the atomic scientists in Chicago founded the Bulletin, they joined with colleagues in Los Alamos, Oak Ridge, and Manhattan to lease an office in Washington, forming a Beltway collaboration that eventually became the Federation of American Scientists. Last year, just after the clock announcement, Bronson, Brown, and former defense secretary William Perry, who now chairs the Bulletinâs board of sponsors, met with House Speaker Nancy Pelosi and Senate Minority Leader Charles Schumerâto lobby not for a specific candidate or bill, but for arms control, diplomacy, and nuclear and climate policies rooted in science. Bulletin staff transmitted the ominous details of the clock statement: North Korean nuclear proliferation, increasing carbon dioxide emissions, and information warfare. This year, alas, Congress was busy with impeachment proceedings.
There is a tension, in such conversations, between fear and hope. How much is too much apocalypse talk? âItâs very hard to find the words, even, to express the moment we now are in,â Brown said, during the clock announcement. âI myself am a person of limitless words, but I canât find how to say it in such a way that it can be heard.â Back in November, at the end of the closing plenary session, a tall, bespectacled woman in the audience raised her hand: Elizabeth Talerman, a strategic-communications expert, who offered some advice on framing. Itâs best to avoid phrases like âexistential threat,â she said, because they bum people out. The Doomsday Clock certainly has its skeptics, mostly on the right. See: âJust skip the doomsday predictions, guysâ (the National Review); âGoose eggs: No climate change doomsday warning has come trueâ (the Washington Examiner); âThe Climate Doomsday Trapâ (the Cato Institute). Strauss, the former editor, told me that the Bulletin has played just as important a role in debunking âoverhyped threatsââfor example, âfears that terrorists might start massive forest firesââas it has in playing up actual perils.
When I asked Brown how the Bulletin should convey the urgency of the climate crisis, he didnât have an easy answer. He brought up a document from 1992, a one-page âWarning to Humanityâ published by the Union of Concerned Scientists, a nonprofit whose members and staff often write for the Bulletin. âA great change in our stewardship of the earth and the life on it is required, if vast human misery is to be avoided and our global home on this planet is not to be irretrievably mutilated,â the statement reads. Brownâs point was that every climate messenger, not just at the Bulletin, struggles to balance gloom and motivation. Meaghan Parker, executive director of the Society of Environmental Journalists, told me, âItâs not so much about the emotionâare you a doom writer or a solutions-and-hope writer?âbut talking about the specific, lived changes of real people.â
Some Bulletin articles punch and flail; others coax. Many do both, traipsing from seemingly intractable problems to optimistic solutions. In its March 2019 issue, the Bulletin examined âclimate change actionâfrom the right,â including an interview with Christine Todd Whitman, the former governor of New Jersey and head of the Environmental Protection Agency under George W. Bush, and an article about a Christian group, Young Evangelicals for Climate Action. Mecklinâs editorâs note offered practical guidance to âungenerous cornersâ of the American left: âRepublican officeholders are not likely to agree to substantive action on climate change until they feel it is clearly in their best political interest to do so. The best people to explain those best interests to Republican congressmen and women? Republicans who believe in climate action and vote their beliefs.â Recently, when I sat down to read a tall stack of Bulletin articles, I felt a confusing combination of terror, depletion, and productive rage.
Perhaps this is how the original atomic scientists felt, trembling from guilt, trying to pull us away from the abyss. Nuclear war, so overwhelming a concept, once needed its own metaphors to be understood. When the Bulletin first took on climate change as an area of focus, it might have seemed an odd fit. âAs they say, nuclear can do us in in an afternoon; climate change will take much longer,â Kennette Benedict, the Bulletinâs former director and publisher, who oversaw the inclusion of climate change in the clock-setting, told me. But the two crises are now an inseparable apocalyptic pair. If memories of fallout shelters and air raid drills make rising sea levels and extreme temperatures feel more pressing, then so be it.
TOP IMAGE: Illustration by Gaby DâAlessandro