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Saturday, November 07, 2026

Lessons from Dan Osborn’s Defeat in Nebraska

Even the strongest individual candidate cannot substitute for the patient work of building an independent political movement.


Dan Osborn, nonpartisan candidate for U.S. Senate, fist bumps supporters during an election watch party in Omaha on Tuesday, Nov. 3, 2026.
(Photo: Nikos Frazier/Omaha World-Herald via Getty Images)

Les Leopold
Nov 05, 2026
Common Dreams

Dan Osborn, the independent candidate and former local union president, once again came within a few percentage points of winning the Nebraska US Senate seat. (He lost by 6.7% in 2024 and the same again this year.) He mounted an impressive challenge, but he couldn’t close the gap. Why? And what does his defeat tell us about the future of independent working-class politics?

Wouldn’t Osborn have done much better if he ran as a Democrat?

The anti-Trump Blue Wave created key red state Senate Democratic victories as it tore through Texas, Kansas, Iowa, Ohio, South Carolina, and maybe even Mississippi. But, it hit the shoals in North Dakota where the Democrat lost by 20.7 percent, by 18 percent in Oklahoma, and by 30.4 percent in Wyoming. The wave also didn’t reach the rest of the South and border states.

It would be prudent to lay the foundation for an independent party that would be overtly committed to take on corporate power, runaway inequality, and job insecurity.

So, it is not at all clear that a Democrat would have outperformed Osborn in Nebraska. Nevertheless, there are several lessons from Osborn’s defeat worth considering.

1. Running for the Senate is a big deal.

Anyone running for the US Senate against a Republican in a very red state is going to face a wall of money. There are only a handful of genuinely competitive Senate races every two years, and enormous sums flow into them. Osborn was up against $37 million—about $40 per voter—the most ever spent on a Senate race in Nebraska.

It would be nice to think money doesn’t matter, but when the sums are that enormous it does. Money buys advertising, organization, visibility, and an increased ability to define a candidate, as well as to define the candidate’s opponent. Overcoming those advantages is extraordinarily difficult.

2. Running for the Senate is a big jump.

I can’t think of anyone who has gone directly from serving as a local union president to being elected to the US Senate. That’s a hell of a leap, and Osborn deserves enormous credit for attempting it.

But it raises a question: Why not first run for a less demanding office, build an organization, establish a political record, and develop a broader base of support? Why not Congress or the state legislature?

We can second guess all we want, but there’s no guarantee that a smaller race would have been easier for Osborn. And sometimes political opportunities don’t wait. Especially because building political power takes time, which means the odds were stacked against Osborn from the start.

3. Was he really an independent, or a Democrat in disguise?

Everyone knows the Democratic brand is in terrible shape in Nebraska, as well as in much of red America. We did a survey that shows how much. Running as an independent, for Osborn, made considerable sense. But according to the New York Times,
“more than half of voters — 55 percent — say they see Mr. Osborn, a union leader, as more of a Democrat than anything else. Just one third of voters say they consider him to be an independent.”


And, of course, the Republicans spent millions hammering away at that perception throughout the campaign.

To make matters worse, a leaked recordings captured Osborn privately expressing views that were far more liberal from the more cautious public positions he took during the campaign on issues like the border wall, transgender people, and ICE.

Whether or not voters agreed with the positions on those issues he’d taken in public, the episode created a credibility problem. It reinforced the Republican argument that Osborn was really a Democrat hiding behind an independent label.

This points to a larger problem: An independent candidate running alone must convince voters that his independence is real if he’s going to avoid negativity of the Democratic brand in red America.

4. There is no substitute for building an independent political organization, step by step.

Osborn could be labeled—or mislabeled—a Democratic shill precisely because he was an individual candidate. He did not represent a political organization with a record of independence from the two major parties. He had no established movement behind him to demonstrate what that independence meant. As an individual, it was all on him.

Compare that with the Nonpartisan League, which prospered in North Dakota during and after World War I. It had a coherent platform, including the public ownership of grain elevators and the establishment of a publicly owned bank. (The public Bank of North Dakota still operates today.) In a few years, the League recruited tens of thousands of dues-paying members and ran candidates for local and state offices.

It was never about one person. It was a movement and a political organization. The verbal gaffes or vulnerabilities of any individual candidate could not bring down the entire effort.

Building that kind of organization takes longer than trying to produce a dramatic political breakthrough from the top down. It’s not impossible for one individual to pull it off—Osborn has come remarkably close—but relying on one candidate makes the entire effort vulnerable to that person’s mistakes, inconsistencies, or political liabilities. (Consider the Dem’s experience with Graham Platner in Maine.)

It was never about one person. It was a movement and a political organization. The verbal gaffes or vulnerabilities of any individual candidate could not bring down the entire effort.

An organization built around a clear platform is much stronger over the long run. It can explain, over several years and through many different candidates, what it means to be independent of the two major parties. Its record, membership, and collective work become the proof of its independence, and it becomes much more difficult to dismiss the entire organization as a Democratic front.

5. Osborn’s race shows why we need a long-term vision for a new working-class party. Or will the Democrats again become the party of working people?

The alternative to running as an individual is the creation of a new political organization of working people—one that is fundamentally different from the Democrats and the Republicans.

But why bother? Aren’t the Democrats now positioned to fight for powerful pro-worker policies like raising the minimum wage, facilitating labor union organizing, and putting price controls on pharmaceutical and food cartels?

Let’s hope so. But, it’s just as possible for the Democrats with narrow victories in purple districts to call for moderate policies to secure their positions and maintain the support of their wealthy donors. Although we might see a slew of investigations to uncover corruption and the Epstein files, there may be little movement on the most basic economic protections for working people.

And the Democrats still do not have the support of a majority of voters without college degrees, according to exit polls.

Therefore, it would be prudent to lay the foundation for an independent party that would be overtly committed to take on corporate power, runaway inequality, and job insecurity. It would fight for good jobs, decent wages, strong unions, and support for communities where working people can thrive.

Osborn’s campaign demonstrated that an independent working-class candidate could mount a serious challenge in a red state. His defeat should not obscure that achievement.

But it would also have to welcome working people with a range of social and cultural beliefs, including people who might not feel comfortable with the progressive left. That doesn’t mean abandoning basic principles of fairness, equality, and justice. It does mean recognizing that working people will not agree on everything, and that a successful political organization must be broad enough to unite them around their common economic interests.

Most important, it must be a party of and by working people. Its members—not wealthy donors, not political consultants, not a handful of prominent leaders—must shape its platform, choose its candidates, run its campaigns, and recruit new members. It must be an organization people actively participate in, not simply a label they vote for every few years.

Dan Osborn’s campaign demonstrated that an independent working-class candidate could mount a serious challenge in a red state. His defeat should not obscure that achievement. But it also reminds us that even the strongest individual candidate cannot substitute for the patient work of building an independent political movement.

We need to move beyond the search for the next Dan Osborn. We need to build a political organization that can produce hundreds of them.

Let’s hope Osborn’s remarkable effort helps lay the foundation for that movement.

(For more, please see A Party of Our Own.)



Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.


Les Leopold

Les Leopold is the executive director of the Labor Institute and author of the new book, “The Billionaires Have Two Parties, We Need a Party of Our Own” (2026). His previous books include: “Wall Street’s War on Workers: How Mass Layoffs and Greed Are Destroying the Working Class and What to Do About It" (2024); "Runaway Inequality: An Activist's Guide to Economic Justice" (2015); and “The Man Who Hated Work and Loved Labor: The Life and Times of Tony Mazzocchi” (2007). Read more of his work on his substack here.
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Democrats, Please Take Note: Peace Is Good Politics

The message of voters is the same everywhere: diplomacy is safer, more effective, and trillions of dollars cheaper than war.



A group of National Guardsmen walk past the Win Without War Billboard Truck displaying the message “No War With Iran” in front of the U.S. Capitol on State Of The Union Day on February 24, 2026 in Washington, DC.
(Photo by Jemal Countess/Getty Images for Win Without War)

Jeffrey D. Sachs
Nov 05, 2026
Common Dreams

Voters across the United States were loud and clear on Tuesday in their historic drubbing of Trumpism. The election was a decisive rejection of Trump’s war on Iran and its staggering costs at home. While savoring their victory and the historic opportunity to restore America’s constitutional order, the Democrats should take the anti-war message of the election to heart, because they suffered the same verdict two years ago, when voters rejected the Biden administration’s wars in Ukraine and Gaza. Last week Israeli voters rejected Netanyahu’s reckless wars, and European voters are also rejecting parties that prolong the Ukraine War. The message of voters is the same everywhere: diplomacy is safer, more effective, and trillions of dollars cheaper than war.

On election night Trump conceded to Fox News, “I think a part of it was Iran.” The next day Vice President JD Vance was far blunter, posting on X: “The reason we lost is the war. The president himself said so last night.... everyone knows why we lost.” In the AP Voter Poll, about 60 percent of voters said the decision to use military force against Iran was wrong, and about 90 percent called the cost of living a crucial or major factor in their vote.

The war and the cost of living were of course utterly intertwined. Gasoline prices, around $2.80 per gallon before the war began on February 28, had risen by about 55 percent by mid-May and reached a monthly average of $4.43 in September. The 10-year Treasury yield climbed from below 4 percent before the war to above 5 percent in the autumn, and the Pentagon sought more than $200 billion in supplemental war funding. Every family with a mortgage, a car loan or a credit card balance suffered from the war.

Voters everywhere are sending the same message: peace through diplomacy.

The first duty of the new Congress is to restore its constitutional authority over war and its power of the purse to ensure that US forces are not sent back into combat in Iran or anywhere else on the whim of a president and the behest of domestic or foreign lobbies. Trump must of course refrain from restarting the war, which was never remotely necessary or justified. Remember that on February 28, the day the US and Israel launched the war, Oman’s foreign minister, who was mediating the U.S.-Iran talks, had said that a deal was within reach.

The Democrats should not imagine that the anti-war lesson applies only to Republicans. Kamala Harris lost in 2024 because voters held the Biden administration responsible for the costs of its own wars. The energy shock that followed the escalation of the Ukraine war in 2022 drove up inflation, and gasoline topped $5 per gallon for the first time in June 2022. Biden twice rejected negotiations that could have ended the conflict: in December 2021, when his administration refused to negotiate on NATO enlargement in response to Russia’s draft security treaty, and in April 2022, when the Istanbul talks were abandoned at the behest of the US and UK.

The Gaza genocide also cost the Democrats directly. Among Americans who voted for Joe Biden in 2020 but not for Harris in 2024, 29 percent named ending Israel’s violence in Gaza as the main factor in their decision, the most frequently cited issue. The party’s voters have moved far ahead of its leaders. A New York Times/Siena poll in May 2026 found that roughly three-quarters of Democratic voters oppose US military and economic assistance to Israel.

Voters everywhere are sending the same message: peace through diplomacy. On October 27, after Israeli wars in Gaza, Lebanon and Iran, Netanyahu lost his majority. Similarly, European leaders who have tied themselves to open-ended war in Ukraine are being rejected by the voters. Only 10 percent of Germans are satisfied with Chancellor Friedrich Merz, the lowest rating ever recorded for a German chancellor. Emmanuel Macron’s approval fell to 15 percent in October. In Bulgaria, Iliana Iotova, who favors dialogue with Moscow, won the presidency on November 1 with more than 58 percent of the vote.

A key upcoming key test for the Democrats will be Ukraine. They must stop their party’s typical Russia-bashing and instead support a diplomatic end to the war.

As a start, the Democrats should remember why the war started. In 1990 the United States assured Mikhail Gorbachev that NATO would not move “one inch eastward.” The Clinton administration broke that promise. In 2008 the Bush administration pushed through the Bucharest declaration that Ukraine and Georgia “will become members of NATO,” despite Ambassador William Burns’s warning that this was the brightest of all red lines for Russia. In 2014 the United States backed the coup against Ukraine’s elected president, Viktor Yanukovych, as the leaked Nuland-Pyatt call made clear. In April 2022, when negotiators in Istanbul came close to a peace agreement based on Ukrainian neutrality, the US and UK actually intervened to block the agreement. Today 75 percent of Ukrainians support negotiations with Russia to end the war.

The Democrats should not mistake their victory for a mandate to pursue their own wars.

In view of these causes of the war, I have recently set out a straightforward diplomatic framework for peace in Ukraine that would end the war. NATO would end its eastward expansion. Ukraine would adopt permanent neutrality on the model of Austria in 1955. An armistice line would be drawn, with both sides renouncing the use of force to change it. Ukraine would pursue membership in the European Union as a permanently neutral state. The Democrats should support such a diplomatic approach. It’s what can end the war, save Ukraine, and win the backing of both the Ukrainian and American people.

Most importantly, the Democrats should not mistake their victory for a mandate to pursue their own wars. The new Democratic majority should quickly reassert the constitutional authority of Congress over war and peace, champion a negotiated peace in Ukraine, end support for Israel’s wars, cut the military budget, and redirect the savings toward lowering the cost of living and repairing the public finances.

These positions are not only right but are good politics. For the Democrats to win the White House in 2028, they should become the party of peace. Better yet, both parties should become parties of peace and conduct the 2028 campaign on which party will best address America’s needs for decent jobs, affordability, healthcare, housing, a safe environment, and quality education.


Our work is licensed under Creative Commons (CC BY-NC-ND 3.0). Feel free to republish and share widely.


Jeffrey D. Sachs
Jeffrey D. Sachs is a University Professor and Director of the Center for Sustainable Development at Columbia University, where he directed The Earth Institute from 2002 until 2016. He is also President of the UN Sustainable Development Solutions Network and a commissioner of the UN Broadband Commission for Development. He has been advisor to three United Nations Secretaries-General, and currently serves as an SDG Advocate under Secretary-General Antonio Guterres. Sachs is the author, most recently, of "A New Foreign Policy: Beyond American Exceptionalism" (2020). Other books include: "Building the New American Economy: Smart, Fair, and Sustainable" (2017) and "The Age of Sustainable Development," (2015) with Ban Ki-moon.
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With 74% of Voters Saying Iran War Was Big Factor in Midterms, Dems Urged to Become Peace Party

“Will Democrats finally get it?” asked one progressive expert. “Americans are tired of war. They want a new foreign policy.


People oppose US war on Iran and support for Israel’s genocide in Gaza during a June 22, 2025 protest in Los Angeles.
(Photo by David McNew/Getty Images)

Brett Wilkins
Nov 04, 2026
COMMON DREAMS


Nearly three-quarters of Americans who voted in Tuesday’s midterm elections said that President Donald Trump’s illegal war of choice on Iran was a significant factor in their vote, a figure that opponents of US militarism said underscored the need for the Democrats to become a true anti-war party.

According to NBC News exit polling, 74% of voters called the ongoing US-Israeli war on Iran a “crucial” or “major” factor in their vote, with Democrats winning 63% of people who responded that way. Meanwhile, 63% of voters said the Trump administration made the wrong decision in taking military action against Iran, compared with 37% who said it was the right decision.

“There will be a lot of infighting and arguing over what happened and why that is,” Vice President JD Vance said Tuesday in a lengthy social media post. “One of the pollsters I really respect told me that our economic messaging wasn’t sharp enough down the stretch. I’m sure that’s true.”

“But the real reason we lost is obvious to almost everyone,” the vice president continued. “The reason we lost is the war. The president himself said so last night.”

Indeed, Trump acknowledged that the war harmed Republicans, telling Fox News, “I think a part of it was Iran,” but nevertheless defended the 35-week military campaign, insisting that “people understood the importance of what I’ve done with Iran.”

In an interview with The Wall Street Journal, Trump was similarly unapologetic, declaring: “I did the right thing. I would have done it again.”

Numerous observers contended that Tuesday’s results offered an opportunity for Democrats to do more than simply capitalize on Republican mistakes.

“Among other things, this is an absolute rebuke of the war in Iran. Democrats would be wise to heed that lesson and truly become the anti-war party,” said commentator Ben Rhodes—who, while serving as a senior national security adviser to then-President Barack Obama, supported US intervention in countries including Iraq, Libya, and Syria, as well as Obama’s wider drone war campaign.

Geopolitics scholar Van Jackson opined on social media that “if Democrats remain the party of the national security state, they will lose everything in 2028. If they become the anti-war party, they’ll consolidate this wave with the presidency.”

A Wednesday analysis on the libertarian site Reason by Matthew Petti argued that Democrats now have an opportunity to exercise Congress’ constitutional power over the war, including by withholding military funding.

Petti noted that Rep. Ro Khanna (D-Calif.) told Fox News last week, “The House and the Senate should stop the funding for any further actions in the Iran War,” just like “we did to stop the Vietnam War.”

However, Petti cautioned that Democratic electoral victories usually don’t lead to anti-war foreign policy.

“Party leadership that is willing to attack Republicans’ execution of the war may not share a principled anti-war commitment,” he wrote, recalling how Democrats who swept the 2006 midterms over public anger with the Iraq War but then struggled to use their control of both chambers of Congress to end it.

Sen. Chris Van Hollen (D-Md.) wants his party to cut off funding for Trump’s war and said Democrats can do so by demanding explicit restrictions on war spending as a condition of supporting the fiscal year 2027 government funding bill that expires next month.

“Right now, the continuing resolution goes through December 11,” Van Hollen told The Lever on Tuesday. “And my view is that Democrats should not advance spending to continue to fund this war.”

“The Vietnam War ended only when Congress defunded it,” he added. “This is an illegal war, and we need to make sure that taxpayer monies are not used to continue an illegal war.”

Institute for Middle East Understanding executive director Margaret DeReus pleaded on social media, “For the love of all that is good, Democrats, do not squander this.”

“The voters have given you a mandate. Use it. Be the party of working people. Be the anti-war party. Be the anti-corruption party,” she added. “We cannot go back to business as usual.”

Matt Duss, a former top aide to US Sen. Bernie Sanders (I-Vt.) who serves as executive vice president at the Center for International Policy, noted that “Trump ran and won as an anti-war candidate in 2024 because Democrats left that lane wide open for him.”

“Voters have just brutally punished him and the GOP for breaking that promise. Will Democrats finally get it?” Duss added. “Americans are tired of war. They want a new foreign policy.”

Friday, November 06, 2026

END ANIMAL TESTING!

KAIST professor Kyung-In Jang selected for ERC Synergy Grant to study how the brain controls movement in freely moving monkeys



An international research team including Professor Kyung-In Jang from KAIST’s Department of Mechanical Engineering has been selected for the European Research Council (ERC) Synergy Grant program, a major European research funding initiative



The Korea Advanced Institute of Science and Technology (KAIST)

KAIST Professor Kyung-In Jang Selected for ERC Synergy Grant to Study How the Brain Controls Movement in Freely Moving Monkeys

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Concept illustration

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Credit: KAIST





How does the brain process sensory information and use it to control movement when we walk or touch an object? An international research team involving KAIST will investigate this question by monitoring brain activity in freely moving monkeys. The goal is to uncover the principles underlying the brain’s control of movement and, in the long term, lay the foundation for technologies that help patients with injuries to the nervous system return to everyday life.

KAIST (President Choongsik Bae) announced on November 6 that NeuroEthoPrim (“From Neuroethology to Restoring Sensorimotor Function via Stealth Neurotechnologies in Freely Moving Primates”), a project in which Professor Kyung-In Jang from the Department of Mechanical Engineering serves as a co-principal investigator, has been selected for a 2026 ERC Synergy Grant. This is the first time a researcher affiliated with a Korean university has been selected as a principal investigator under this program.

Professor Luca Bonini from the University of Parma in Italy serves as the project’s corresponding principal investigator. He co-leads the project with Professor Silvestro Micera of the Scuola Superiore Sant’Anna (SSSA) in Italy and the École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland, and Professor Jang. Over the next six years, the team will receive approximately €9.68 million (approximately KRW 14.4 billion), of which approximately €3.10 million (approximately KRW 4.6 billion) will be allocated to KAIST.

The ERC is the European Union’s funding body for frontier research. The Synergy Grant program supports groups of two to four principal investigators who combine their expertise to tackle research challenges that would be difficult for a single researcher to address alone. The program also funded BlackHoleCam, which contributed to capturing the first image of a black hole in 2019.

The study focuses on how the brain functions as animals move freely. In conventional experiments, an animal’s head is held in a fixed position while it repeatedly performs a prescribed movement. This approach allows precise measurement of brain signals but offers limited insight into the complex movements of everyday life.

The team will simultaneously record brain activity, whole-body movement, and tactile information in NeuroEthoRoom, an experimental space where monkeys can walk freely and search for food. Through this approach, the researchers aim to determine how the brain translates what the animals see and feel into body movements.

The researchers will also study decoding, which uses brain signals to infer the intention to move, and encoding, which converts external sensory information into signals the brain can process. In this way, the team will examine communication in both directions: reading movement commands from the brain and conveying sensory information to it.

The collected data will be used to build a foundation model, an AI model that learns the relationships between different types of sensory input and movement. The goal is to use brain signals and behavioral data to identify the common principles underlying the control of body movement.

Professor Jang will lead the development of wireless neural interfaces. These devices record brain signals or deliver stimulation to the brain. His team aims to reduce the physical mismatch between soft brain tissue and rigid semiconductors so that the devices can maintain stable signal recordings as the animals move freely and stimulate specific brain regions as needed.

Professor Jang’s team plans to use the findings to support the development of ALEX, a next-generation brain chip, and LUCAS, an operating system designed to help patients with neurological disorders operate devices. The team will also pursue commercialization through ENSIDE, a faculty-founded startup. In the long term, the team aims to build on these technologies to develop a Brain-to-X platform that would enable patients with quadriplegia to control devices such as smartphones and wheelchairs using brain signals. Applying the technology to humans will require further research and validation of its safety and efficacy.

“The starting point for this research is to understand how the brain links sensation and movement when we move freely,” said Professor Jang. He added that the team would make every effort to ensure that the findings from this basic research help people with injuries to the nervous system return to everyday life.

Animal experiments in this project will comply with the EU Directive on the protection of animals used for scientific purposes (Directive 2010/63/EU) and will be conducted following approval from the Institutional Animal Care and Use Committee (IACUC) at each participating institution.


Wednesday, November 04, 2026

 

Afforestation reshapes wildfire activity across temperate regions worldwide

Peer-Reviewed Publication

University of Eastern Finland

Plantation in Spain.

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Plantation in Spain.

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Credit: Juli Pausas.

Tree planting provides wood, biomass and climate benefits, but the location where those new forests are established matters. An international study by researchers in Spain, Chile and Finland shows that converting non-forested land into planted forests can increase wildfire activity, with contrasting outcomes across temperate regions.

The study, published in the Proceedings of the National Academy of Sciences (PNAS), used satellite records from 2001–2023 to analyse 67,248 patches converted into planted forests. After accounting for climate, accessibility and patch size, afforestation was associated with an average 26% increase in fire occurrence per hectare per year and a 23% increase in expected burned area when fires occurred.

“Forest plantations change the fuel conditions in which fires start and spread. We wanted to understand how these changes differ across landscapes, rather than assuming that tree planting has the same consequences everywhere,” says lead author Irene Repeto-Deudero from the University of Cádiz and the University of Eastern Finland.

The researchers emphasise that wildfires can also undermine the long-term carbon storage expected from tree planting.

“These results therefore require that tree planting initiatives consider their exposure to fire. As the climate warms, increased wildfire risk may impact the capacity of forest plantations to store carbon in the long term,” says the study’s coordinator, Professor Susana Gómez-González of the University of Cádiz.

The findings have practical implications for forestry and land-use planning, particularly where plantation expansion coincides with increasingly severe fire weather.

“Plantations are necessary in many cases to produce wood and other ecosystem services, including soil protection. However, their location must be carefully planned to avoid unintended consequences on local fire regimes,” says Professor Blas Mola-Yudego of the University of Eastern Finland. “Fire risk needs to be considered from the outset, alongside production goals and environmental benefits.”

The strongest increases were found in temperate conifer forest regions, where fire occurrence rose almost threefold and expected burned area approximately doubled. Both measures also increased in Mediterranean regions. However, in temperate broadleaf and mixed forest regions, fires became less frequent but burned larger areas. Temperate grasslands, savannas and shrublands showed reduced fire occurrence without a significant increase in burned area.

“These contrasting responses show why local ecological conditions must guide afforestation decisions. The same intervention can have very different consequences depending on the vegetation, climate and existing fire regime,” says co-author Alejandro Miranda of the University of La Frontera, Chile.

The research involved institutions in Spain, Chile and Finland and received funding from the Spanish Ministerio de Ciencia e Innovación, the Chilean Centre for Climate and Resilience Science (CR2), and the Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT), and the European Union’s Horizon Europe project Eco2Adapt (Ecosystem-based Adaptation and Changemaking to Shape, Protect and Maintain the Resilience of Tomorrow’s Forests).


Plantation in Spain.

Credit

Susana Gómez-González

 

Testing Einstein's laws from the bottom of the Mediterranean Sea



Using atmospheric neutrinos, the KM3NeT collaboration has set new limits on possible violations of a fundamental principle of physics



Sissa Medialab

View from inside a detector building block of detection units.

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View from inside a detector building block of detection units. Clearly visible the yellow buoy of a near by detection unit.
https://www.km3net.org/pictures-and-videos/picture-galleries/album-artists-impressions/

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Credit: Edward Berbee/Nikhef






Are the laws of physics truly the same everywhere in the Universe? This fundamental principle, known as Lorentz invariance, lies at the heart of Einstein’s theory of relativity. Yet some theories that seek to reconcile gravity with quantum physics suggest that it might not always hold. To investigate this possibility, researchers from the international KM3NeT collaboration analysed 5,828 atmospheric neutrino candidate events detected by KM3NeT/ORCA, a neutrino telescope located deep in the Mediterranean Sea. They found no evidence of a violation, but were able to set new experimental limits on how large such effects could be, including the first direct constraints on certain possible differences in the behaviour of muon and tau neutrinos. The results are published in the Journal of Cosmology and Astroparticle Physics (JCAP).

Could spacetime be different from what we think?

Why question such a fundamental principle? One reason lies in the search for a theory of quantum gravity, capable of reconciling general relativity with quantum physics. Some theoretical approaches suggest that spacetime, which we normally consider continuous, might actually be made up of extremely small, discrete units. This could have profound implications for the laws of physics, potentially including violations of Lorentz invariance.
“We still don't know whether our spacetime is continuous or might be discrete,” explains Alba Domi, researcher at Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander-Universität Erlangen-Nürnberg, and one of the study's two corresponding authors. “Looking for violations of Lorentz invariance is one way to investigate this possibility.”

Neutrinos are particularly promising probes for signs of such new physics, as Domi explains. These tiny particles rarely interact with matter, allowing them to travel enormous distances, even through the Earth. They also have a remarkable property: they can change from one type, or “flavour” (this is the term used by scientists), to another as they travel, a phenomenon known as neutrino oscillation. The probability of these transformations can be predicted with great precision. If the observed behaviour differs from these predictions, it could be a sign of new physics, potentially including a violation of Lorentz invariance.
To look for such deviations, the researchers analysed 1.4 years of data collected with the first six detection units of KM3NeT/ORCA, comparing the observed neutrino energies and arrival directions with theoretical predictions.

New limits, new possibilities

The researchers found no evidence of Lorentz invariance violation. However, this does not mean that such violations are impossible: their results establish new limits on how large certain effects could be without contradicting the observations. Despite being obtained with an early, partial configuration of the detector, the results are competitive with those of long-running experiments such as IceCube and Super-Kamiokande. For the first time, they also established direct limits on certain possible effects of Lorentz invariance violation involving two neutrino flavours, muon and tau, and the way neutrinos oscillate between them.

These results are particularly promising considering that, at the time the data were collected, ORCA was still in an early stage of construction, operating with just six detection units. The detector is still being expanded towards its full planned configuration [see box].

“These results show the potential of KM3NeT/ORCA to test fundamental principles of physics, even with a relatively small detector,” says Lukas Hennig, a PhD student at ECAP and the study's other corresponding author. “With more data and an expanding detector, we will be able to search for even smaller effects.”
In the future, the researchers hope to extend their investigations to KM3NeT/ARCA, which focuses on much higher-energy neutrinos arriving from distant astrophysical sources. Such neutrinos could be especially promising for these searches, as some possible effects of Lorentz invariance violation become more pronounced over very long distances and at higher energies. “ARCA could be particularly well suited to this kind of research, but we don't yet have enough astrophysical neutrino events to perform such an analysis,” explains Domi.

The growing importance of high-energy neutrino research was recently recognised with the 2026 Nobel Prize in Physics, awarded to Francis Halzen for his pioneering contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos from space. 

The analysis was carried out as part of Domi’s Marie SkÅ‚odowska-Curie Postdoctoral Fellowship (QGRANT), funded by the European Union’s Horizon Europe programme.
 

KM3NeT: two detectors, two scientific missions

KM3NeT is an international research infrastructure under construction in the Mediterranean Sea. It consists of two underwater neutrino telescopes, ORCA and ARCA, which use networks of highly sensitive light sensors installed deep underwater to detect the faint flashes of light produced when neutrinos interact with matter.

ORCA (Oscillation Research with Cosmics in the Abyss) is located about 40 km off the coast of Toulon, France, at a depth of approximately 2,450 metres. It is designed to study neutrinos produced in the Earth's atmosphere, focusing on how they oscillate between different flavours.

ARCA (Astroparticle Research with Cosmics in the Abyss) is located off the coast of Sicily, near Portopalo di Capo Passero, at a depth of approximately 3,500 metres. It focuses on much higher-energy neutrinos arriving from distant astrophysical sources, helping scientists investigate some of the most energetic phenomena in the Universe.

The two detectors complement each other, allowing KM3NeT to investigate neutrinos across a broad range of energies.

 

Optical module attached to the Dyneema ropes of the detection unit

Optical module attached to the Dyneema ropes of the detection unit

https://www.km3net.org/optical-module-attached-to-the-dyneema-ropes-of-the-detection-unit/

Credit

KM3NeT Collaboration