Science

scientists-built-an-ai-co-pilot-for-prosthetic-bionic-hands

Scientists built an AI co-pilot for prosthetic bionic hands

To test their AI-powered hand, the team asked intact and amputee participants to manipulate fragile objects: pick up a paper cup and drink from it, or take an egg from a plate and put it down somewhere else. Without the AI, they could succeed roughly one or two times in 10 attempts. With the AI assistant turned on, their success rate jumped to 80 or 90 percent. The AI also decreased the participants’ cognitive burden, meaning they had to focus less on making the hand work.

But we’re still a long way away from seamlessly integrating machines with the human body.

Into the wild

“The next step is to really take this system into the real world and have someone use it in their home setting,” Trout says. So far, the performance of the AI bionic hand was assessed under controlled laboratory conditions, working with settings and objects the team specifically chose or designed.

“I want to make a caveat here that this hand is not as dexterous or easy to control as a natural, intact limb,” George cautions. He thinks that every little increment that we make in prosthetics is allowing amputees to do more tasks in their daily life. Still, to get to the Star Wars or Cyberpunk technology level where bionic prostheses are just as good or better than natural limbs, we’re going to need more than just incremental changes.

Trout says we’re almost there as far as robotics go. “These prostheses are really dexterous, with high degrees of freedom,” Trout says, “but there’s no good way to control them.” This in part comes down to the challenge of getting the information in and out of users themselves. “Skin surface electromyography is very noisy, so improving this interface with things like internal electromyography or using neural implants can really improve the algorithms we already have,” Trout argued. This is why the team is currently working on neural interface technologies and looking for industry partners.

“The goal is to combine all these approaches in one device,” George says. “We want to build an AI-powered robotic hand with a neural interface working with a company that would take it to the market in larger clinical trials.”

Nature Communications, 2025.  DOI: 10.1038/s41467-025-65965-9

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investors-commit-quarter-billion-dollars-to-startup-designing-“giga”-satellites

Investors commit quarter-billion dollars to startup designing “Giga” satellites

A startup established three years ago to churn out a new class of high-power satellites has raised $250 million to ramp up production at its Southern California factory.

The company, named K2, announced the cash infusion on Thursday. K2’s Series C fundraising round was led by Redpoint Ventures, with additional funding from investment firms in the United States, the United Kingdom, and Germany. K2 has now raised more than $400 million since its founding in 2022 and is on track to launch its first major demonstration mission next year, officials said.

K2 aims to take advantage of a coming abundance of heavy- and super-heavy-lift launch capacity, with SpaceX’s Starship expected to begin deploying satellites as soon as next year. Blue Origin’s New Glenn rocket launched twice this year and will fly more in 2026 while engineers develop an even larger New Glenn with additional engines and more lift capability.

Underscoring this trend toward big rockets are other launchers like SpaceX’s Falcon 9 and Falcon Heavy, United Launch Alliance’s Vulcan, and new vehicles from companies like Rocket Lab, Relativity Space, and Firefly Aerospace. K2’s founders believe satellites will follow a similar progression, reversing a trend toward smaller spacecraft in recent years, to address emerging markets like in-space computing and data processing.

Mega, then Giga

K2 is designing two classes of satellites—Mega and Giga—that it will build at an 180,000-square-foot factory in Torrance, California. The company’s first “Mega Class” satellite is named Gravitas. It is scheduled to launch in March 2026 on a Falcon 9 rocket. Once in orbit, Gravitas will test several systems that are fundamental to K2’s growth strategy. One is a 2o-kilowatt Hall-effect thruster that K2 says will be four times more powerful than any such thruster flown to date. Gravitas will also deploy twin solar arrays capable of generating 20 kilowatts of power.

“Gravitas brings our full stack together for the first time,” said Karan Kunjur, K2’s co-founder and CEO, in a company press release. “We are validating the architecture in space, from high-voltage power and large solar arrays to our guidance and control algorithms, and a 20 kW Hall thruster, and we will scale based on measured performance.”

Investors commit quarter-billion dollars to startup designing “Giga” satellites Read More »

ars-live:-3-former-cdc-leaders-detail-impacts-of-rfk-jr.’s-anti-science-agenda

Ars Live: 3 former CDC leaders detail impacts of RFK Jr.’s anti-science agenda

The Centers for Disease Control and Prevention is in critical condition. This year, the premier public health agency had its funding brutally cut and staff gutted, its mission sabotaged, and its headquarters riddled with literal bullets. The over 500 rounds fired were meant for its scientists and public health experts, who endured only to be sidelined, ignored, and overruled by Health Secretary Robert F. Kennedy Jr., an anti-vaccine activist hellbent on warping the agency to fit his anti-science agenda.

Then, on August 27, Kennedy fired CDC Director Susan Monarez just weeks after she was confirmed by the Senate. She had refused to blindly approve vaccine recommendations from a panel of vaccine skeptics and contrarians that he had hand-selected. The agency descended into chaos, and Monarez wasn’t the only one to leave the agency that day.

Three top leaders had reached their breaking point and coordinated their resignations upon the dramatic ouster: Drs. Demetre Daskalakis, Debra Houry, and Daniel Jernigan walked out of the agency as their colleagues rallied around them.

Dr. Daskalakis was the director of the CDC National Center for Immunization and Respiratory Diseases. He managed national responses to mpox, measles, seasonal flu, bird flu, COVID-19, and RSV.

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no-sterile-neutrinos-after-all,-say-microboone-physicists

No sterile neutrinos after all, say MicroBooNE physicists

Since the 1990s, physicists have pondered the tantalizing possibility of an exotic fourth type of neutrino, dubbed the “sterile” neutrino, that doesn’t interact with regular matter at all, apart from its fellow neutrinos, perhaps. But definitive experimental evidence for sterile neutrinos has remained elusive. Now it looks like the latest results from Fermilab’s MiniBooNE experiment have ruled out the sterile neutrino entirely, according to a paper published in the journal Nature.

How did the possibility of sterile neutrinos even become a thing? It all dates back to the so-called “solar neutrino problem.” Physicists detected the first solar neutrinos from the Sun in 1966. The only problem was that there were far fewer solar neutrinos being detected than predicted by theory, a conundrum that became known as the solar neutrino problem. In 1962, physicists discovered a second type (“flavor”) of neutrino, the muon neutrino. This was followed by the discovery of a third flavor, the tau neutrino, in 2000.

Physicists already suspected that neutrinos might be able to switch from one flavor to another. In 2002, scientists at the Sudbury Neutrino Observatory (or SNO) announced that they had solved the solar neutrino problem. The missing solar (electron) neutrinos were just in disguise, having changed into a different flavor on the long journey between the Sun and the Earth. If neutrinos oscillate, then they must have a teensy bit of mass after all. That posed another knotty neutrino-related problem. There are three neutrino flavors, but none of them has a well-defined mass. Rather, different kinds of “mass states” mix together in various ways to produce electron, muon, and tau neutrinos. That’s quantum weirdness for you.

And there was another conundrum, thanks to results from Los Alamos’ LSND experiment and Fermilab’s MiniBooNE (MicroBooNE’s predecessor). Both found evidence of muon neutrinos oscillating into electron neutrinos in a way that shouldn’t be possible if there were just three neutrino flavors. So physicists suggested there might be a fourth flavor: the sterile neutrino, so named because unlike the other three, it does not couple to a charged counterpart via the electroweak force. Its existence would also have big implications for the nature of dark matter. But despite the odd tantalizing hint, sterile neutrinos have proven to be maddeningly elusive.

No sterile neutrinos after all, say MicroBooNE physicists Read More »

nasa-just-lost-contact-with-a-mars-orbiter,-and-will-soon-lose-another-one

NASA just lost contact with a Mars orbiter, and will soon lose another one

Technicians work on the MAVEN spacecraft at NASA’s Kennedy Space Center in Florida ahead of its launch in 2013. Credit: NASA/Kim Shiflett

But NASA’s two other Mars orbiters have been in space for more than 20 years. The older of the two, named Mars Odyssey, has been at Mars since 2001 and will soon run out of fuel, probably sometime in the next couple of years. NASA’s Mars Reconnaissance Orbiter, which launched in 2005, is healthy for its age, with enough fuel to last into the 2030s. MRO is also important to NASA because it has the best camera at Mars, with the ability to map landing sites for future missions.

Two European spacecraft, Mars Express and the ExoMars Trace Gas Orbiter, have radios to relay data between mission controllers and NASA’s landers on the Martian surface. Mars Express, now 22 years old, suffers from the same aging concerns as Mars Odyssey and MRO. The ExoMars Trace Gas Orbiter is newer, having arrived at Mars in 2016, but is also operating beyond its original lifetime.

China and the United Arab Emirates also have orbiters circling Mars, but neither spacecraft is equipped to serve as a communications relay.

NASA’s Curiosity and Perseverance rovers have the capability for direct-to-Earth communications, but the orbiting relay network can support vastly higher data throughput. Without overhead satellites, much of the science data and many of the spectacular images collected by NASA’s rovers might never make it off the planet.

MAVEN’s unique orbit, stretching as far as 2,800 miles (4,500 kilometers) above Mars, has some advantages for data relay. In that orbit, MAVEN could relay science data from rovers on the surface for up to 30 minutes at a time, longer than the relay periods available through NASA’s lower-altitude orbiters. Because of this, MAVEN could support the largest data volumes of any of the other relay options.

NASA just lost contact with a Mars orbiter, and will soon lose another one Read More »

this-is-the-oldest-evidence-of-people-starting-fires

This is the oldest evidence of people starting fires


We didn’t start the fire. (Neanderthals did, at least 400,000 years ago.)

This artist’s impression shows what the fire at Barnham might have looked like. Credit: Craig Williams, The Trustees of the British Museum

Heat-reddened clay, fire-cracked stone, and fragments of pyrite mark where Neanderthals gathered around a campfire 400,000 years ago in what’s now Suffolk, England.

Based on chemical analysis of the sediment at the site, along with the telltale presence of pyrite, a mineral not naturally found nearby but very handy for striking sparks with flint, British Museum archaeologist Rob Davis and his colleagues say the Neanderthals probably started the fire themselves. That makes the abandoned English clay pit at Barnham the oldest evidence in the world that people (Neanderthal people, in this case) had learned to not only use fire, but also create it and control it.

A cozy Neanderthal campfire

Today, the Barnham site is part of an abandoned clay pit where workers first discovered stone tools in the early 1900s. But 400,000 years ago, it would have been a picturesque little spot at the edge of a stream-fed pond, surrounded by a mix of forest and grassland. There are no hominin fossils here, but archaeologists unearthed a Neanderthal skull about 100 kilometers to the south, so the hominins at Barnham were probably also Neanderthals. The place would have have offered a group of Neanderthals a relatively quiet, sheltered place to set up camp, according to Davis and his colleagues.

The cozy domesticity of that camp apparently centered on a hearth about the size of a small campfire. What’s left of that hearth today is a patch of clayey silt baked to a rusty red color by a series of fires; it stands out sharply against the yellowish clay that makes up the rest of the site. When ancient hearth fires heated that iron-rich yellow clay, it formed tiny grains of hematite that turned the baked clay a telltale red. Near the edge of the hearth, the archaeologists unearthed a handful of flint handaxes shattered by heat, alongside a scattering of other heat-cracked flint flakes.

And glinting against the dull clay lay two small pieces of a shiny sulfide mineral, aptly named pyrite—a key piece of Stone Age firestarting kits. Long before people struck flint and steel together to make fire, they struck flint and pyrite. Altogether, the evidence at Barnham suggests that Neanderthals were building and lighting their own fires 400,000 years ago.

Fire: the way of the future

Lighting a fire sounds like a simple thing, but once upon a time, it took cutting-edge technology. Working out how to start a fire on purpose—and then how to control its size and temperature—was the breakthrough that made nearly everything else possible: hafted stone weapons, cooked food, metalworking, and ultimately microprocessors and heavy-lift rockets.

“Something else that fire provides is additional time. The campfire becomes a social hub,” said Davis during a recent press conference. “Having fire… provides this kind of intense socialization time after dusk.” It may have been around fires like the one at Barnham, huddled together against the dark Pleistocene evening, that hominins began developing language, storytelling, and mythologies. And those things, Davis suggested, could have “played a critical part in maintaining social relationships over bigger distances or within more complex social groups.” Fire, in other words, helped make us more fully human and may have helped us connect in the same way that bonding over TV shows does today.

Archaeologists have worked for decades to try to pinpoint exactly when that breakthrough happened (although most now agree that it probably happened multiple times in different places). But evidence of fire is hard to find because it’s ephemeral by its very nature. The small patch of baked clay at Barnham hasn’t seen a fire in half a million years, but its light is still pushing back the shadows.

an artist's impression of a person's hands holding a piece of flint and a piece of pyrite, striking them together to make sparks

This was the first step toward the Internet. We could have turned back. Credit: Craig Williams, The Trustees of the British Museum

A million-year history of fire

Archaeologists suspect that the first hominins to use fire took advantage of nearby wildfires: Picture a Homo erectus lighting a branch on a nearby wildfire (which must have taken serious guts), then carefully carrying that torch back to camp to cook or make it easier to ward off predators for a night. Evidence of that sort of thing—using fire, but not necessarily being able to summon it on command—dates back more than a million years at sites like Koobi Fora in Kenya and Swartkrans in South Africa.

Learning to start a fire whenever you want one is harder, but it’s essential if you want to cook your food regularly without having to wait for the next lightning strike to spark a brushfire. It can also help maintain the careful control of temperature needed to make birch tar adhesives, “The advantage of fire-making lies in its predictability,” as Davis and his colleagues wrote in their paper. Knowing how to strike a light changed fire from an occasional luxury item to a staple of hominin life.

There are hints that Neanderthals in Europe were using fire by around 400,000 years ago, based on traces of long-cold hearths at sites in France, Portugal, Spain, the UK, and Ukraine. (The UK site, Beeches Pit, is just 10 kilometers southwest of Barnham.) But none of those sites offer evidence that Neanderthals were making fire rather than just taking advantage of its natural appearance. That kind of evidence doesn’t show up in the archaeological record until 50,000 years ago, when groups of Neanderthals in France used pyrite and bifaces (multi-purpose flint tools with two worked faces, sharp edges, and a surprisingly ergonomic shape) to light their own hearth-fires; marks left on the bifaces tell the tale.

Barnham pushes that date back dramatically, but there’s probably even older evidence out there. Davis and his colleagues say the Barnham Neanderthals probably didn’t invent firestarting; they likely brought the knowledge with them from mainland Europe.

“It’s certainly possible that Homo sapiens in Africa had the ability to make fire, but it can’t be proven yet from the evidence. We only have the evidence at this date from Barnham,” said Natural History Museum London anthropologist Chris Stringer, a coauthor of the study, in the press conference.

a person holds a tiny fragment of pyrite between a thumb and forefinger

The two pyrite fragments at the side may have broken off a larger nodule when it was struck against a piece of flint. Credit: Jordan Mansfield, Pathways to Ancient Britain Project.

Digging into the details

Several types of evidence at the site point to Neanderthals starting their own fire, not borrowing from a local wildfire. Ancient wildfires leave traces in sediment that can last hundreds of thousands of years or more—microscopic bits of charcoal and ash. But the area that’s now Suffolk wasn’t in the middle of wildfire season when the Barnham hearth was in use. Chemical evidence, like the presence of heavy hydrocarbon molecules in the sediment around the hearth, suggests this fire was homemade (wildfires usually scatter lighter ones across several square kilometers of landscape).

But the key piece of evidence at Barnham—the kind of clue that arson investigators probably dream about—is the pyrite. Pyrite isn’t a naturally common mineral in the area around Barnham; Neanderthals would have had to venture at least 12 kilometers southeast to find any. And although few hominins can resist the allure of picking up a shiny rock, it’s likely that these bits of pyrite had a more practical purpose.

To figure out what sort of fire might have produced the reddened clay, Davis and his colleagues did some experiments (which involved setting a bunch of fires atop clay taken from near the site). The archaeologists compared the baked clay from Barnham to the clay from beneath their experimental fires. The grain size and chemical makeup of the clay from the ancient Neanderthal hearth looked almost exactly like “12 or more heating events, each lasting 4 hours at temperatures of 400º Celsius or 600º Celsius,” as Davis and his colleagues wrote.

In other words, the hearth at Barnham hints at the rhythms of daily life for one group of Neanderthals 400,000 years ago. For starters, it seems that they kindled their campfire in the same spot over and over and left it burning for hours at a time. Flakes of flint nearby conjure up images of Neanderthals sitting around the fire, knapping stone tools as they told each other stories long into the night.

Nature, 2025 DOI: 10.1038/s41586-025-09855-6 About DOIs).

Photo of Kiona N. Smith

Kiona is a freelance science journalist and resident archaeology nerd at Ars Technica.

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court:-“because-trump-said-to”-may-not-be-a-legally-valid-defense

Court: “Because Trump said to” may not be a legally valid defense

In one of those cases, a judge lifted the hold on construction, ruling that a lack of a sound justification for the hold made it “the height of arbitrary and capricious,” a legal standard that determines whether federal decision-making is acceptable under the Administrative Procedures Act. If this were a fictional story, that would be considered foreshadowing.

With no indication of how long the comprehensive assessment would take, 17 states sued to lift the hold on permitting. They were joined by the Alliance for Clean Energy New York, which represents companies that build wind projects or feed their supply chain. Both the plaintiffs and the agencies that were sued asked for summary judgment in the case.

The first issue Judge Saris addressed is standing: Are the states suffering appreciable harm from the suspension of wind projects? She noted that they would receive tax revenue from the projects, that their citizens should see reduced energy costs following their completion, and that the projects were intended to contribute to their climate goals, thus limiting harm to their citizens. At one point, Saris even referred to the government’s attempts to claim the parties lacked standing as “tilting at windmills.”

The government also argued that the suspension wasn’t a final decision—that would come after the review—and thus didn’t fall under the Administrative Procedures Act. But Saris ruled that the decision to suspend all activity pending the rule was the end of a decision-making process and was not being reconsidered by the government, so it qualified.

Because Trump told us to

With those basics out of the way, Saris turned to the meat of the case, which included a consideration of whether the agencies had been involved with any decision-making at all. “The Agency Defendants contend that because they ‘merely followed’ the Wind Memo ‘as the [Wind Memo] itself commands,’ the Wind Order did not constitute a ‘decision’ and therefore no reasoned explanation was required,” her ruling says. She concludes that precedent at the circuit court level blocks this defense, as it would mean that agencies would be exempt from the Administrative Procedures Act whenever the president told them to do anything.

Court: “Because Trump said to” may not be a legally valid defense Read More »

brazil-weakens-amazon-protections-days-after-cop30

Brazil weakens Amazon protections days after COP30


Backed by powerful corporations, nations are giving public false choices: Environmental protection or economic growth.

Deforestation fire in the Amazon rainforest. Credit: Brasil2

Despite claims of environmental leadership and promises to preserve the Amazon rainforest ahead of COP30, Brazil is stripping away protections for the region’s vital ecosystems faster than workers dismantled the tents that housed the recent global climate summit in Belém.

On Nov. 27, less than a week after COP30 ended, a powerful political bloc in Brazil’s National Congress, representing agribusiness, and development interests, weakened safeguards for the Amazon’s rivers, forests, and Indigenous communities.

The rollback centered on provisions in an environmental licensing bill passed by the government a few months before COP30. The law began to take shape well before, during the Jair Bolsonaro presidency from 2019 to 2023. It reflected the deregulatory agenda of the rural caucus, the Frente Parlamentar da Agropecuária, which wielded significant power during his term and remains influential today.

Bolsonaro’s government openly supported weakening environmental licensing. His environment minister, Ricardo Salles, dismissed licensing as “a barrier to development” and pushed for broad deregulation.

Current President Luiz Inácio Lula da Silva vetoed many of its most controversial provisions in August, citing risks to Indigenous rights and environmental oversight. But in late November, the legislature overturned those vetoes and reinstated the contested sections.

“This is neither improving nor modernizing, it is simply deregulation,” said Sarah Sax, who analyzes Brazil’s climate and human rights policies as a researcher with Climate Rights International, a California-based nonprofit advocating for climate justice.

“It’s happening in Brazil in ways that mirror what you’re seeing around the world. These are proxy fights over democracy, human rights, and institutional power,” she said, noting a broader global pattern of industrial and political blocs pushing deregulation and weakening institutions designed to protect communities and ecosystems.

According to analyses by the Brazilian Academy of Sciences and other organizations, the provisions at issue will enable many projects to get permits by self-declaring compliance, without undergoing complete environmental impact assessments or third-party review.

Under the law, deforested properties or land cleared without a license can be retroactively legalized without restoring the land or ecological conditions, which rewards illegal deforestation. Larger projects, like irrigation, dams, and sanitation works, as well as roads and energy infrastructure, can proceed with minimal environmental scrutiny, risking more forest fragmentation and habitat destruction. And the licensing changes narrow who must be recognized and consulted during reviews, which could exclude communities without formal land titles.

A human rights issue

It’s alarming that the legislature overrode the vetoes, said Astrid Puentes Riaño, the United Nations special rapporteur on the human right to a healthy environment. As it stands now, the law may violate Brazil’s international environmental commitments, she added.

“What is at stake is [whether] Brazil, as a country, is able to effectively protect the environment, including all their fundamental resources,” she said.

She noted that Brazil is not facing this problem alone.

“I think that we, unfortunately, are seeing a wave of regressions globally toward weakened environmental impact assessments, because they’re seen as obstacles for development and investment,” she said.

But cutting reviews when science clearly shows that the planet is facing a “triple crisis of climate change, biodiversity loss, and toxic contamination” is a huge step in the wrong direction.

“Environmental impact assessments are not a checklist in a supermarket,” she said. “They are an essential element for states to prevent environmental, climate, human rights, and social impacts.”

She emphasized that weakening environmental review isn’t a technocratic tweak or political win for one side. It undermines the foundations of public health, Indigenous rights, and climate safety.

“This is not about politics, it’s about survival,” she said. “Some of these impacts on water, on air, on biodiversity, on people’s health, are irreversible. These are not things you can fix later.”

Climate backlash is scientifically unfounded

The fight over Brazil’s environmental licensing law can be seen as a microcosm of global climate policy tensions, with governments performatively signaling climate ambition at international meetings, such as COP30, while doubling down on economic nationalism by claiming there is no money for climate action at home and instead financing measures to boost development and growth.

Claudio Angelo, with Brazilian NGO Observatório do Clima, said that this false-choice paradigm was “certainly an underlying theme” in the debates over the law.

“It has appeared in the speeches of most Congressmen who voted for the new legislation and to overturn Lula’s vetoes,” he said. “But, more worryingly, there was a lot of sheer disinformation.”

The two lobbying groups that pushed for the law that weakens environmental reviews repeatedly said that the existing licensing process is too slow and thus hampers economic progress. They claimed, without proof, that thousands of projects were stuck in the permitting process.

“But in the end, this may have been more about hubris than anything,” Angelo said. “Congress did that because it could. And because the private interests most Congressmen serve don’t want any regulation of any kind.”

Even without a complete analysis, it’s clear that cutting environmental reviews conflicts indirectly with Brazil’s climate plans, making it more difficult to stop deforestation.

Angelo expects some environmental groups will challenge the new law. Parts of it are subject to a 180-day waiting period, he said, so the final outcome is unclear. But a companion measure that passed as an executive order just this week, creates a fast-track permitting process for projects the government deems strategic, and it is effective immediately.

Puentes Riaño said recent advisory opinions from the International Court of Justice and the Inter-American Court of Human Rights make it clear that states must “use all means at their disposal to prevent actions that cause significant harm” to the Earth’s climate.

A growing body of research in ecological economics shows that such false choices are mainly a political narrative used by special interest groups to justify deregulation, despite evidence showing that degrading ecosystems undermines both climate goals and economic resilience.

Mainstream science and climate reports, including the Sixth Assessment Report from the Intergovernmental Panel on Climate Change and the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services, directly contradict the idea that countries must choose between protecting ecosystems and achieving economic development.

The studies show that intact forests, healthy rivers, and secure Indigenous and local land rights are among the most effective and cost-efficient climate mitigation strategies available, delivering carbon sequestration, ecosystem resilience, public health and long-term economic stability. The IPCC explicitly recognizes community-led stewardship and ecosystem protection as core pillars of climate action, not afterthoughts.

Those scientific realities also underpinned the 2015 Paris Agreement, which ignited more public pressure for climate action, including youth-led mass demonstrations like the Fridays for Future marches that swelled in 2019. For a short time after COP21 in Paris, climate ambition rose worldwide, pushing governments to adopt stronger targets and framing ecosystems and community rights as essential to mitigation.

But the COVID-19 pandemic and Russia’s invasion of Ukraine unleashed overlapping economic shocks that reset priorities. Governments focused on energy security, food security supply chains and inflation, creating openings for industrial and agricultural lobbies to argue that environmental rules hindered economic recovery.

Those pressures dovetailed with persistent strains of economic nationalism and identity politics, strengthening political forces that frame environmental safeguards as constraints on sovereignty and growth. The result was global regulatory rollbacks, from the US and Canada to mining regions in Indonesia and Australia, each framed as necessary to speed development, stabilize supply chains or simply acting out of economic self-interest.

Germany, for example, arrived at COP30 emphasizing its commitment to ambitious climate action. But weeks later, its new government under Chancellor Friedrich Merz pressed the European Union to weaken or delay the bloc’s 2035 phaseout of gas- and diesel-fueled cars.

The move mirrored Brazil’s own post-COP30 reversal. In both cases, political leaders under pressure from domestic industries framed their actions as necessary to defend national interests amid economic uncertainty.

Why it matters

Brazil’s post-COP30 shift toward deregulation in the name of economic development has far-reaching implications because Amazon forests influence global climate and weather patterns, circulating vast amounts of heat and water with effects that ripple far beyond the Amazon Basin.

Moisture from the rainforests creates a belt of rising, humid air that shapes rainfall patterns from the Andes to the US Gulf Coast. Research shows that when large areas of the Amazon are cleared or degraded, the system weakens, shifting precipitation patterns in ways that can amplify droughts in South America and intensify rainfall extremes elsewhere.

Drier Amazon conditions also warm the tropical Atlantic and can change winds that shape Atlantic hurricane formation, potentially boosting the frequency or intensity of storms that strike the Caribbean and North America. Research on long-distance links in the climate system shows that Amazon drying can also reduce summer rainfall across the US Midwest and Southern Plains, regions that depend on predictable precipitation for agriculture.

And the Amazon’s role as a critical carbon sink is also at risk. Its vegetation and soils store about 150 billion to 200 billion metric tons of carbon, equivalent to about 70 to 90 years of annual US fossil-fuel carbon dioxide emissions.

Brazil’s land-use sector is already one of the world’s largest sources of climate-warming pollution. Deforestation, fires, and forest degradation in the Amazon and Cerrado savanna account for 700 million to 800 million metric tons of climate-warming gases annually, equal to Germany’s yearly emissions.

Research shows that additional degradation enabled by the licensing law increases the risk of rainforest dieback, which could convert large tracts of rainforest to drier savanna-like conditions, pushing the region closer to a tipping point beyond which the Amazon would drive accelerated warming rather than helping to stabilize the climate.

Brazil’s reversal lands at a moment when the world can least afford mixed signals, and COP30 ended with Indigenous leaders warning that “our land is not for sale” and that “we can’t eat money,” reminding delegates that protecting forests is not an abstraction but a matter of survival.

Brazil’s decision to weaken environmental protections so soon after COP30 captures the larger crisis facing global climate policy: the widening gap between international promises and domestic political choices. And the Amazon can’t withstand much more waffling, Sax said.

“There is no planet B,” she said. “This is the fight.”

This article originally appeared on Inside Climate News, a nonprofit, non-partisan news organization that covers climate, energy and the environment. Sign up for their newsletter here.

Photo of Inside Climate News

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pompeii-construction-site-confirms-recipe-for-roman-concrete

Pompeii construction site confirms recipe for Roman concrete

Back in 2023, we reported on MIT scientists’ conclusion that the ancient Romans employed “hot mixing” with quicklime, among other strategies, to make their famous concrete, giving the material self-healing functionality. The only snag was that this didn’t match the recipe as described in historical texts. Now the same team is back with a fresh analysis of samples collected from a recently discovered site that confirms the Romans did indeed use hot mixing, according to a new paper published in the journal Nature Communications.

As we’ve reported previously, like today’s Portland cement (a basic ingredient of modern concrete), ancient Roman concrete was basically a mix of a semi-liquid mortar and aggregate. Portland cement is typically made by heating limestone and clay (as well as sandstone, ash, chalk, and iron) in a kiln. The resulting clinker is then ground into a fine powder with just a touch of added gypsum to achieve a smooth, flat surface. But the aggregate used to make Roman concrete was made up of fist-sized pieces of stone or bricks.

In his treatise De architectura (circa 30 CE), the Roman architect and engineer Vitruvius wrote about how to build concrete walls for funerary structures that could endure for a long time without falling into ruin. He recommended the walls be at least two feet thick, made of either “squared red stone or of brick or lava laid in courses.” The brick or volcanic rock aggregate should be bound with mortar composed of hydrated lime and porous fragments of glass and crystals from volcanic eruptions (known as volcanic tephra).

Admir Masic, an environmental engineer at MIT, has studied ancient Roman concrete for several years. For instance, in 2019, Masic helped pioneer a new set of tools for analyzing Roman concrete samples from Privernum at multiple length scales—notably, Raman spectroscopy for chemical profiling and multi-detector energy dispersive spectroscopy (EDS) for phase mapping the material. Masic was also a co-author of a 2021 study analyzing samples of the ancient concrete used to build a 2,000-year-old mausoleum along the Appian Way in Rome known as the Tomb of Caecilia Metella, a noblewoman who lived in the first century CE.

And in 2023, Masic’s group analyzed samples taken from the concrete walls of the Privernum, focusing on strange white mineral chunks known as “lime clasts,” which others had largely dismissed as resulting from subpar raw materials or poor mixing. Masic et al. concluded that was not the case. Rather, the Romans deliberately employed “hot mixing” with quicklime that gave the material self-healing functionality. When cracks begin to form in the concrete, they are more likely to move through the lime clasts. The clasts can then react with water, producing a solution saturated with calcium. That solution can either recrystallize as calcium carbonate to fill the cracks or react with the pozzolanic components to strengthen the composite material.

Pompeii construction site confirms recipe for Roman concrete Read More »

why-is-my-dog-like-this?-current-dna-tests-won’t-explain-it-to-you.

Why is my dog like this? Current DNA tests won’t explain it to you.

Popular genetics tests can’t tell you much about your dog’s personality, according to a recent study.

A team of geneticists recently found no connection between simple genetic variants and behavioral traits in more than 3,200 dogs, even though previous studies suggested that hundreds of genes might predict aspects of a dog’s behavior and personality. That’s despite the popularity of at-home genetic tests that claim they can tell you whether your dog’s genes contain the recipe for anxiety or a fondness for cuddles.

A little gray dog with his tongue sticking out tilts his head backwards as he looks sideways at the camera.

This is Max, and no single genetic variant can explain why he is the way he is. Credit: Kiona Smith

Gattaca for dogs, except it doesn’t work

University of Massachusetts genomicist Kathryn Lord and her colleagues compared DNA sequences and behavioral surveys from more than 3,000 dogs whose humans had enrolled them in the Darwin’s Ark project (and filled out the surveys). “Genetic tests for behavioral and personality traits in dogs are now being marketed to pet owners, but their predictive accuracy has not been validated,” wrote Lord and her colleagues in their recent paper.

So the team checked for relatively straightforward associations between genetic variants and personality traits such as aggression, drive, and affection. The 151 genetic variants in question all involved small changes to a single nucleotide, or “letter,” in a gene, known as single-nucleotide polymorphisms (SNPs).

It turns out that the answer was no: Your dog’s genes don’t predict its behavior, at least not in the simplistic way popular doggy DNA tests often claim.

And that can have serious consequences when pet owners, shelter workers, or animal rescues use these tests to make decisions about a dog’s future. “For example, if a dog is labeled as genetically predisposed to aggression, an owner might limit essential social interactions, or a shelter might decide against adoption,” Lord and her colleagues wrote.

Why is my dog like this? Current DNA tests won’t explain it to you. Read More »

a-massive,-chinese-backed-port-could-push-the-amazon-rainforest-over-the-edge

A massive, Chinese-backed port could push the Amazon Rainforest over the edge


“this would come with a road”

The port will revolutionize global trade, but it’s sparking destructive rainforest routes.

CHANCAY, Peru—The elevator doors leading to the fifth-floor control center open like stage curtains onto a theater-sized screen.

This “Operations Productivity Dashboard” instantaneously displays a battery of data: vehicle locations, shipping times, entry times, loading data, unloading data, efficiency statistics.

Most striking, though, are the bold lines arcing over the dashboard’s deep-blue Pacific—digital streaks illustrating the routes that lead thousands of miles across the ocean, from this unassuming city, to Asia’s biggest ports.

Inside the Chancay port, a digital dashboard displays detailed statistics of shipments and shows the direct routes across the Pacific from Peru’s coast to major ports in Asia, including Shanghai, the world’s largest. Credit: Georgina Gustin/Inside Climate News

Chancay sits at a curve along the ocean, about 50 miles north of Lima. Until recently, it was best known for its medieval-themed amusement park, a crescent of beach, and a row of seaside restaurants. Now it’s home to South America’s newest, most technologically advanced deepwater megaport and the epicenter of China’s bid to control the flow of goods to and from this commodity-rich continent.

For Peru, the recent opening of the port here was the realization, nearly two decades in the making, of a dream to position itself as South America’s global transportation hub, the continent’s primary launching point for a straight shot across the Pacific to Asia’s biggest economies.

For China, the port delivers a strategically direct route for the critical minerals and agricultural commodities coming off the continent, and in the other direction, a more expedient channel for its cars, machinery, and electronics to stream into South American markets.

The port represents Peru’s first project under the banner of China’s Belt and Road Initiative, Beijing’s $1.3 trillion bid to remake how the world travels and trades, and collectively speaking, the most ambitious infrastructure project in history. It is China’s flagship infrastructure investment in South America—and a crucial node in Beijing’s global strategy for securing access to critical commodities.

It also brings China logistically closer to one of its chief goals: direct access to neighboring Brazil and the massive amounts of timber, soy, and beef produced in the Amazon rainforest. Now, in theory, these commodities no longer have to travel through the politically fraught Panama Canal or around the continent’s southern tip. The new megaport, the only one in South America that can manage the largest class of fully loaded container ships, cuts the transport time by 10 days or more.

First, though, these commodities have to make their way to the port—and to do that, they have to somehow cross the Andes, the vertiginous mountain system that traces the western edge of the continent, from Venezuela to Chile.

There is no good, easy way to haul goods over the Andes now. That is changing.

The port has reawakened old ambitions of roads, railways, and water routes that could connect the riches of the Amazon to the continent’s west coast and the world’s largest ocean. The prospect of a fast track across the Pacific has sparked new momentum—a willingness to reconsider the engineering challenge posed by the world’s longest mountain chain.

“The port is a magnet,” said Luis Fernandez, executive director of Wake Forest University’s Center for Amazonian Scientific Innovation. “They’ll find more efficient ways to get over the Andes, to plug into Chancay.”

But environmental scientists and forestry experts warn that the economic pull of the port will speed the destruction of the Amazon, the planet’s most critical, climate-stabilizing terrestrial ecosystem.

The port and its faster link to massive Asian economies, they warn, will deepen and expand an extractive network of roads, railways, and waterways that have already eaten into the rainforest, a web of arteries carrying oil, gold, timber, beef, and soy to markets around the world.

The operating landscape at the Chancay port, north of Lima, is China’s biggest port project in Latin America and one of the most technologically sophisticated and automated ports in the world. Credit: Georgina Gustin/Inside Climate News

The pressure could push the rainforest over the edge, transforming it from the world’s largest terrestrial carbon sink into a massive emitter of planet-warming gases. Some research suggests the forest is already at or near this potentially catastrophic tipping point.

“China wants everything in the Amazon,” said Julia Urrunaga, director of Peru programs for the Environmental Investigation Agency, an international nonprofit that investigates environmental crimes. “And in one way or another, all these routes are connected to the port.”

In July, seven months after the port’s inauguration, China and Brazil formally announced they would explore the possibility of a railway leading from Brazil’s Atlantic coast directly to Chancay. China has already committed $50 billion toward infrastructure in the region.

The massive undertaking would ultimately create a beeline for commodities to flow more directly from Brazil to China, already its biggest trading partner, and augment a notoriously troubled and underutilized highway, completed in 2011, that runs from Brazil’s western Amazon to the Peruvian coast.

Even if the newly proposed cross-continental railway is never built—and some analysts think it won’t be—the lure of China’s appetites and wealth will stress the Amazon ecosystem, simply because the port will spark investments in other road, rail, or waterway projects to serve it, whether China is directly involved or not.

“When you start talking about these big corridors, it creates incentive for a lot of small routes,” said David Salisbury, an associate professor of geography at the University of Richmond who has extensively studied the impact of infrastructure on deforestation in the Amazon. “In a world where carbon storage is absolutely necessary for sustaining a stable planet, increasing the axes of forest degradation—whether it’s a road or a railway—is a big mistake.”

A port is just a port until there are roads and railways leading to it, and China has made clear that access to its biggest South American infrastructure project is a priority. Although China is clearly the world’s clean energy leader, there’s little, if any, research into the climate impact of its infrastructure investments, including any kind of holistic analysis of the port and its potential impact on the Amazon or neighboring and equally vulnerable ecosystems, including Brazil’s Pantanal and Cerrado. Most of China’s infrastructure investments, meanwhile, are in the world’s equatorial midriff—in nations that are rich in resources and climatically critical, but with weak, often corrupt governments and few environmental safeguards.

When China wants to build something, countries—including Peru—are quick to ease or overlook environmental standards and requirements for public participation, critics say, even if that means destroying natural resources or communities.

“Unquestionably any infrastructure, and any attempts at development, will put a lot of pressure on the Amazon,” said Enrique Ortiz, a Peruvian tropical ecologist who runs the Washington, DC-based Andes Amazon Fund. “Are there safeguards? That’s where we’re so weak.”

In Chancay, residents say, the developers of the port tore their city apart. In their zeal to embrace its economic promise, city leaders ignored local complaints, residents told Inside Climate News. The project proceeded without the legally required public input and access to information, advocacy groups found, ruining lives and homes in the process.

Hundreds of miles to the east of Chancay, in a rainforest so lush and filled with species that scientists haven’t yet catalogued them all, new worries are percolating. Chinese investment is increasingly prominent, with Chinese machinery, trucks, and workers seemingly everywhere.

Chris Fagan runs the Peru- and US-based Upper Amazon Conservancy. His main objective right now is to stop a roadway from running through a pristine section of the Amazon, which would decimate Indigenous cultures and the rainforest itself.

“The influence of Chinese money on the Amazon can’t be overstated,” he said.

Roads and a revolution

When the Chinese shipping conglomerate COSCO signed the deal to buy a 60 percent stake in the Chancay port, most people guessed what would come next.

“They need the roads,” Urrunaga said. “We knew that from the beginning—that this would come with a road.”

What no one yet knows for sure is where exactly the new roads—or railways or waterways—might be. The port will likely beget many.

The Brazilian government last year announced its plans to build five major new routes through the Amazon to connect with Pacific ports, including Chancay. The roads are part of a larger project that includes modernizing or building 65 highways, 40 waterways, 35 airports, 21 ports and nine railways.

From the Brazilian town of Cruzeiro do Sul, in the western Amazon, a long-discussed 430-mile roadway could finally be paved westward to the city of Pucallpa, the heart of Peru’s timber industry. From there, a road already leads to Chancay.

The new road would cross the region where the Amazon begins—the famously disputed source of the massive arterial sprawl of coffee-colored waterways that form the Amazon basin and its namesake river. This region, which straddles parts of the Andes and the Amazon rainforest, also contains two national parks that are home to 10 Indigenous tribes, including some living in voluntary isolation.

“It’s this huge, intact roadless area and one of the most biodiverse landscapes in the world,” said Fagan, of the Upper Amazon Conservancy, which is headquartered in Pucallpa. “It’s a really important place for global conservation and climate goals.”

It is, according to Fagan, among the biggest, wildest places left in the world. And the road could transform it irrevocably, with its effects spreading far beyond the region itself. If the road is built—as local politicians are pushing for now—it will connect to a handful more major roadways that cut across the wider Amazon, and to yet more that are still in the planning stages.

Since the Brazilian military cut roadways into the Amazon to facilitate its exploitation in the 1960s, a growing body of research has tracked the effects of infrastructure on the rainforest. Deforestation here occurs in a “fishbone” pattern where a primary road leads to secondary roads spiking off it, fragmenting and weakening the forest. This pattern, clearly visible from satellite images, crosshatches across much of the region. Researchers say it’s even more destructive than clearcutting big swaths of forest.

Adding to the pile of research, a study earlier this year found that every one-kilometer (or roughly half-mile) stretch of primary road cut into the rainforest led to 50 kilometers (31 miles) of secondary road—and that the secondary roads triggered more than 300 times more forest degradation or loss.

“The area is experiencing this incredibly rapid expansion of secondary, or unofficial, roads,” the University of Richmond’s Salisbury said, referring to the region where the Pucallpa road would be completed.

This May, Brazilian President Luiz Inácio Lula da Silva met with Chinese President Xi Jinping in Beijing to discuss the new railway that would cut more than 3,000 miles across the continent, from the Atlantic port at Ilheus to Chancay.

“This represents a revolution,” Simone Tebet, Brazil’s minister of planning and budget, said at the time. “The plan is, in fact, to rip Brazil from east to west.”

In July, Brazil and China formally announced a five-year technical study to determine what route the railway would take—a sign that the countries are serious about making the project happen.

One of the possible routes, researchers say, is along the same stretch from Cruzeiro do Sul to Pucallpa where the road is again under discussion.

“If it comes through Pucallpa that’s going to be a huge disaster, ecologically and socially,” Salisbury said, noting the especially pristine nature of the area.

Another possible route is along an already problematic road, known as the Interoceanic Highway, that leads from the western Brazilian Amazon, over the Andes, to Lima. Road and railway ecologists say that while rail is seen as less damaging to forests, its potential impacts are underestimated.

“Are railways better than roads?” said Elizabeth Losos, an adjunct professor at Duke University who runs the ISLe Initiative, a network of educational efforts to make infrastructure more sustainable. “They take up the same amount of space, but for the most part, people get off at stations and can’t get off at multiple places in between. But when they build the railways they create service roads that serve them.”

Salisbury has considered the same question. “Railways are a lot less environmentally and culturally impactful than roads—and that’s crucial,” he said. “But how are you able to control that they remain purely railways? Once you make a linear clearing through the rainforest—how can you stop people from expanding beyond that?”

Automatic, electric, and huge

Jason Guillén Flores is the Chancay port’s safety and environment manager, an engaging evangelist for the state-of-the-art technology that will bring the continent’s raw materials to China and Chinese goods containing those raw materials, transformed, back to the continent.

One day this July, dozens of Chinese-made electric cars had just disembarked from a massive roll-on/roll-off ship and were awaiting distribution into the expanding Latin American market.

From the moment the ships arrive in the docks, their payloads are controlled from the fifth-floor command center. From a giant observation deck, visitors can watch as a fleet of 500 driverless electric trucks shuttle goods from the docks to waiting vehicles.

“All this port is electric—all the different equipment and trucks. All electric,” Guillén Flores said. “This is the fifth port in the world to be all automatic. The other four are in China.”

Guillén Flores walked from the Area de Centro de Control to the Area de Control Remoto where half a dozen women sat at desks, remotely maneuvering the massive cranes that hover in the wintry gray at the docks’ edges. Operating a crane from within its cockpit is exhausting work, Guillén Flores explained, leaning over to demonstrate the hunched position operators often sit in.

“Here there is air conditioning and coffee,” he said. “Six people control 50 cranes.”

Beyond the command center, the loading platforms, and the docks, a 1.7-mile breakwater curves through the ocean, creating a protected area for ships to enter the port. It stands nearly 30 feet high—enough to withstand a tsunami caused by a 10-degree quake. “No problem,” Guillén Flores said.

Constructing the port, he said, required dredging the approach to a depth of nearly 60 feet, moving 7.6 million cubic yards of dirt and rocks and digging a more than mile-long tunnel under the city. Altogether it took 438 explosive blasts.

Guillén Flores stressed that the goal of the port, at least initially, was to help turn Peru into an agricultural powerhouse, ready to supply hungry Asian markets with produce.

“It’s a general vision for Peru to improve ports and agriculture so we can position ourselves as a top country in exporting agricultural products,” he said. Now, he added, a refrigerated container full of Peruvian blueberries or asparagus can reach Shanghai in a mere 23 days.

But the port is designed to handle more than fruits and vegetables.

In 2007 a Peruvian ex-Navy admiral named Juan Ribaudo de la Torre launched an ambitious plan for turning this modest bump of oceanside land into a major port. With his deep connections in the military and government, he eventually found a strategic and willing partner—the Peruvian mining giant Volcan, the world’s fourth largest silver producer and Peru’s largest producer of zinc.

Already some local fishermen were concerned about the fate of their fishing grounds and Volcan’s long track record of environmental violations. In 2011, through a subsidiary, Volcan acquired 50 percent of the port project, from the company launched by Ribaudo, for $450 million. Around the same time, lawyers with connections to Volcan formed an offshore company, based in the British Virgin Islands, to secretly begin purchasing plots of land for the port.

Fishing boats sit anchored in Chancay’s harbor with the new port’s cranes. Credit: Rommel Gonzalez via Getty

When Ribaudo died in 2013, Volcan took full control of the project under the name Terminales Portuarios Chancay. That same year, Peruvian regulators approved an environmental impact study for the project, but residents in Chancay were not given adequate opportunities to access hearings or participate in the review process, advocates say.

“The study was approved in an irregular manner because the civil population didn’t take part as required,” said Alejandro Chirinos, a researcher with the Lima-based environmental and social justice group CooperAcción. “And why were the people not considered? Because people didn’t want Volcan.”

In 2019 officials from Volcan and the Peruvian government attended the World Economic Forum in Davos, Switzerland. By the end of the event, China’s COSCO Shipping Ports Ltd. had signed a deal to buy 60 percent of Terminales Portuarios Chancay.

As the scope of the project expanded with Chinese involvement, so did the price tag. New estimates put the cost of the project at $3.6 billion over three phases. Now, with the financial commitment, the pressure was on regulators to smooth over any potential bumps in the approval process and make sure opponents in the community didn’t stand in the way—though they tried.

Even though it’s a privately operated port, Peruvian government entities—the national police, immigration, health and various inspection services—are already in place here, to expedite inspections and speed shipping. Their presence suggests how deeply integrated the Peruvian government and China have become.

Eventually, the Chancay port could be encompassed by a special economic zone, giving tax breaks to companies with operations there. “Apple, GE, Samsung will move to Peru and establish hubs here for all of South America,” Guillén Flores said, explaining the broader plan.

But many people who live here believe too much has been given away already.

A city torn apart

Miriam Arce said the explosions just began one day in 2016, without any warning or explanation.

Then, quickly, the construction of the massive deepwater megaport disfigured her city. Over the course of the next two years explosions shook Chancay and its 60,000 residents several times a day. Entire hills and bluffs at the ocean’s edge were blasted away to accommodate the port’s facilities. Walls in peoples’ homes cracked. Foundations crumbled. Houses collapsed when workers blasted an access road that leads to a tunnel under the city. Some species of birds left the city’s oceanside wetlands and never came back.

“They were exploding the hills, the tunnels, at the port—all at the same time,” Arce said. “Can you imagine? It was crazy.”

At the edge of the Santa Rosa wetlands, a hill was blasted away to create room for the megaport. A barrier fence was erected to minimize construction sounds, but local advocates say it did little to dampen the noise. Credit: Georgina Gustin/Inside Climate News

Arce, an artist who runs a small general store out of her house, organized a community group—Frente de Defensa de Chancay (Chancay Defense Front)—in 2014, after learning about the plans for the port. She was particularly concerned about an environmental impact statement that advocates say the government approved in 2013 without releasing a summary to the public or getting adequate public input, as the law requires.

“I started to investigate the consequences—how it will impact people and the environment,” she said. “We discovered many irregularities with the authorizations and the lack of transparency.”

Petite and bespectacled, with a penchant for yellow Snoopy-festooned sneakers, Arce has become a feisty agitator, a persistent burr in the sides of local politicians.

She petitioned for access to public meetings. She pushed for documents. Amid the groundswell of protest Arce and others were stirring up, she became a target. She said she got death threats on the phone. Arce and other Chancay residents say that the then-builders of the port hired a subcontractor to harass and threaten them so the threats couldn’t be traced back to the developers. After she was roughed up during a protest and her phone was taken, Arce filed a complaint with police.

As Arce dug into the situation, she learned that she may have been clueless about the port owner’s plans before 2014, but not everyone was. Terminales Portuarios Chancay, anticipating concerns from local fishermen—a powerful, well-organized cohort in Chancay and Peru more broadly—had already contacted fishing unions, according to Chancay residents. They offered the members scholarships for their children’s education. Many took it.

“They paid to divide us,” Arce said. “We lived in peace for so many years, since we were children. But this project broke things.”

Standing outside the blue concrete box that houses the Association Sindicato de Pescadores Artesanales del Puerto de Chancay, one of several associations that represent fishermen here, Julio Perez said that fish populations near and off the coast of Chancay have plummeted because of the port’s construction and the ongoing flow of ship traffic. But he said he and most other members of the 300-plus member association have made peace with that.

Many of them got 12,000 Peruvian soles (about $3,400), earmarked to pay for tuition, he said. The developers also pay for the occasional party at the association’s headquarters.

“We’re happy,” he said, scanning the street in front of him.

Not everyone is, however.

In a square in the city of Huaral, north of Chancay, fisherman Antonio Luis sat on a curb, wearing the uniform of most local fishermen—a matching track suit and running shoes. He came equipped with data showing the decline in fish populations and the marine species on which those populations depend.

Luis, president of another association called the Artisanal Fishermen of the Small North, said whatever payments the developers offered were not worth the declines.

“Before 2018, we put the net in and we fished enough in order to not fish for two or three days. Enough to live comfortably,” he said, adding that a typical day’s catch was 200 kilograms or more. “Nowadays you go to the beach and it’s nothing like that. I put in a net and if I’m lucky, I can get 15 to 20 kilograms a day. I catch enough to eat. Not enough to sell, which is what I need.”

The “luxury fish,” like corvina and sole that are prized for ceviche, the national culinary mainstay, are especially rare these days.

Luis said that the developers only consulted with a handful of the many fishing associations along this stretch of coast—not his or several others. He sees the payments offered to the other groups as bribes to shut up.

“I’m not opposed to investment,” Luis added. “I’ve just asked for development … between the city and the government without stepping all over the environment.”

Today, with the first phase of the port in full operation, this upended city seems to be in suspension as residents wait for the next wave of construction.

On a quiet July weekday, in the southern hemisphere’s winter, restaurant workers waved menus at passersby, trying to lure them into mostly empty seats. At the beach, dozens of colorfully painted wooden fishing boats were lodged on the sand. No one was out on the water. The fishermen milled around, staring out at an ocean that used to provide an abundant livelihood.

“Mining companies pay people for invading their land. We’d like to get paid for our ocean,” said one fisherman, who would only give his first name, Elias. “The Chinese are just like the US. They’re the big power. If they invest here, if they shared their profits, we’d be happy.”

Near the end of the beach, a handful of tourists climbed little footpaths that lead up a giant bluff to get a view of the sprawling port complex hidden on the other side.

Some fishermen have started a side hustle: Charging a few soles to guide visitors to the top.

On the November day last year when the port was lavishly inaugurated, Arce was not in attendance. Nor was Luis. In fact, Arce said, few of Chancay’s ordinary citizens were there because the celebration was cordoned off. Busloads of police were brought into town to enforce the perimeter of the port, which by then had been encircled with a tall fence.

The message was clear: The city’s new port did not belong to the city.

The perfect place

Wendy Ancieta, a lawyer with the Peruvian Society for Environmental Law, has deep expertise with the country’s environmental impact review process—and its loopholes. She remembers interviewing a gas station owner who was required to get an environmental review for his business. When she asked him who oversaw the review process, he admitted it was a cook at a nearby restaurant.

The country has an abundance of environmental laws, but they’re rarely enforced, according to Ancieta. If a company wants to sail through the environmental review process in pursuit of a massive project—with as little pushback as possible—Peru is a good choice.

China, she said, “came to the perfect place.”

The port’s developer—now called Cosco Shipping Ports Chancay Perú (CSPCP), 60 percent owned by COSCO and 40 percent by Volcan—hired a contractor to conduct the required environmental analysis. In theory, such a document gets thoroughly picked apart by SENACE, the government agency responsible for reviewing the environmental impacts of big projects.

But in practice, that rarely happens.

The Peruvian government allows developers of major construction projects to pick from a registered list of consulting companies that they can hire to conduct an environmental assessment. When the developer gets an assessment they don’t like—that might stand in the way of a project’s completion—they can withhold payment.

When the port’s developers were required by law to do a secondary environmental review, advocacy groups, including Arce’s, hired a researcher named Stefan Austermühle to analyze it for flaws and omissions.

Of the review process, Austermühle said, “You tell them: You will make a nice document for me, where there’s no impact, so I get this project approved. And if you don’t do that, I don’t pay you.”

Austermühle identified 50 problems with the environmental review’s findings. The groups then asked SENACE not to approve the project until these problems were corrected. Ultimately, fewer than half of them were addressed by COSCO—inadequately, according to the groups. The agency approved the project in 2020, two days before Christmas, when few people were looking.

In July of this year, the Peruvian media reported that six SENACE employees were charged with environmental crimes for approving parts of the project without COSCO addressing them first.

In a written response, SENACE said the agency held at least eight meetings and workshops with the public and with local fishing associations in 2019 and 2020, during the development and evaluation of the secondary environmental assessment. The agency recorded at least 1,800 individual attendances across the meetings. The agency also said it forwarded the problems that Austermühle identified in his analysis to the “project owner,” in accordance with federal laws.

In a written response, CSPCP said it had complied with all laws and that the approvals process “went well beyond regulatory requirements regarding public participation, both in the number and diversity of mechanisms implemented.”

The company said it categorically rejects “as completely false” the allegations that it hired a subcontractor to harass opponents of the port project. “At no time has the company hired or instructed subcontractors to harass, intimidate, or interfere with citizens’ participation during protests or demonstrations related to the Project. On the contrary, CSPCP maintains a permanent policy of respect for the right to free expression, peaceful coexistence, and open dialogue with all social stakeholders in the district of Chancay.”

Volcan and the Chinese embassy in Peru did not respond to requests for comment from Inside Climate News. The Peruvian Ministry of Transportation and Communications, which approved the first environmental assessment, before COSCO’s involvement in the port project, also did not respond to questions from Inside Climate News.

Juan Luis Dammert is a Lima-based researcher who studies government corruption and the evolution of infrastructure projects, including the Interoceanic Highway. Like most Peruvians, he is a keen observer of the country’s political ups and downs.

“There’s always corruption here, but we’re at a low point in Peruvian politics,” he said. “It’s corruption’s happy hour.”

The country has had seven presidents in the last decade, including two who are currently in jail for taking bribes from the Brazilian construction company that built the highway. In 2018, the country’s judiciary system was rocked by a corruption scandal. Former President Dina Boluarte, who presided over the port’s inauguration, was highly unpopular and accused of deadly anti-democratic crackdowns against protesters. She was impeached by the Peruvian Congress in October. Two other former Peruvian presidents were jailed on conspiracy and corruption charges in late November.

“We have, as a country, built a number of systems and structures for environmental protection, but now it basically doesn’t exist,” Dammert said. “Congress and the government—if they decide to do anything, they go ahead. They change the law. That’s the context in which this is happening: Now let’s build roads and railways through the Amazon!”

Chinese companies, Dammert said, aren’t necessarily worse or better than any others in their adherence to environmental laws. China’s position on environmental laws in other countries is, largely, not to meddle with them, in alignment with its “non-interference” policy. And, indeed, Chinese-backed companies have stopped a handful of projects, including a dredging project in Peru, over potential violations of environmental laws.

It just happens that Chinese companies are operating in parts of the world where those laws are weak. “There’s no difference between China and other countries in their concern for the environment,” Dammert said. “It very much depends on the host country. In this case, Peru.”

Or Brazil, where environmental safeguards are also collapsing.

The government is currently challenging the legality of a nearly 20-year-old pact, known as the Soy Moratorium, in which grain traders agreed to not buy soybeans grown on land deforested after 2008. The moratorium has been credited with slowing rates of deforestation in the Brazilian Amazon.

In July, the Brazilian Congress approved a new bill that would ease licensing requirements for infrastructure projects deemed to be national priorities. Environmental groups called it the “devastation bill” and said the damage to the rainforest and to broader climate goals would be irreversible.

“It would make it easier getting infrastructure, like railways, approved without requiring environmental studies,” said Meg Symington, vice president of global integrated programs at the World Wildlife Fund. “That’s unfortunate.”

Symington noted that Peru passed a similar law in 2024 that environmental groups say will weaken forest protections. The lowering of environmental standards comes amid a broader autocratic shift in Peru.

A recently passed law will prohibit advocacy groups from pursuing legal action against the government, including for human rights or environmental violations. The law has been widely condemned by international free speech advocates, including Amnesty International and Human Rights Watch.

“This makes it easy for China to operate as they want without any civil society groups complaining,” the Environmental Investigation Agency’s Urrunaga said. “It’s really crazy. … Not even China has a law like that.”

The erosion of democratic functions will usher in projects linked to the port that destroy parts of the rainforest without even the most rudimentary environmental review, environmental groups worry.

Leolino Dourado, a Lima-based researcher at the Center for China and Asia-Pacific Studies at Peru’s University of the Pacific says that shipping commodities through the Amazon and over the Andes to the Pacific makes no economic sense. It’s still cheaper, he said, to ship commodities out of Brazil.

“If you run the numbers, it’s more cost effective to export through the Atlantic, which is the traditional route,” he said. The Interoceanic Highway is a case in point, he added: “It’s really underutilized because it makes no sense economically.”

But infrastructure projects make perfect political sense. Roads, railways and waterways deliver infusions of cash for hard-up cities and regions, making these passages through the forest powerful forces, however destructive.

“Roads are a good way to get elected,” said Salisbury, with the University of Richmond. “It’s a good way to get politicians in Peru excited about China, even though it doesn’t make economic sense. And it allows the Chinese to have more impact on the Amazon—and Brazil and Peru—just by creating a corridor with a new form of transport, even if it’s not a gamechanger economically.”

Chirinos of CooperAcción authored a study that found a common thread in China’s Belt and Road projects: The countries that join in are a lot like Peru, with a high level of raw materials or other natural resources, but weak institutions and lax oversight. He and other researchers say that puts Peru at an economic disadvantage.

“The project will only take the raw materials and won’t allow us to develop,” Chirinos said.

César Gamboa is the executive director of the Peruvian organization Derecho, Ambiente y Recursos Naturales (Law, Environment and Natural Resources) and has written recently about his concerns that the country’s current political and economic environment will keep ordinary people from sharing in any financial gains from the transition to cleaner energies.

“Always, all the time, Peru underestimates the environmental and social impacts and overestimates the benefits,” Gamboa said. “This is the problem of the Chancay port. Everybody says this is a tool to get out of the political and economic crises, but it’s not. We are not prepared to identify the opportunities and we don’t see the challenges.”

Stepping into a vacuum

China and Peru have had ties going back nearly two centuries, when Chinese immigrants first came here. A very obvious legacy of this is chifa, a Chinese-Peruvian fusion cuisine that can be found in every corner of the country. But in recent years, China’s investments in Peru have soared. Ninety percent of the overall investment—about $28 billion in 2023—is linked to large, state-owned enterprises, according to a recent analysis from the University of the Pacific’s Center for China and Asia-Pacific Studies.

The port is the single biggest flag China has planted on a continent that the United States has long seen as its domain.

“China’s in our red zone,” said Laura Richardson, the now-retired US Army general who served as the commander of US Southern Command from 2021 to 2024.

As Chinese-backed investments expand, projecting Beijing’s power in the region, allegiances and sentiment across South America are shifting.

The Trump administration’s imposition of tariffs and harsh immigration policies that disproportionately impact Latin American countries are increasing anti-American bitterness across much of the region, making China seem like a friendlier, more stable alternative, economically and politically.

The administration’s dismantling of the US Agency for International Development (USAID) earlier this year has only amplified resentments. After Colombia, Peru was the continent’s second-largest recipient of USAID funding, much of it directed at curbing coca plantations. USAID funding to Brazil was largely aimed at programs to conserve the Amazon.

China is stepping into the diplomatic and economic vacuum. Trade between the Community of Latin American and Caribbean States’ members and China rose from $450 billion in 2023 to $515 billion in 2024. Earlier this year, Xi announced $9 billion in credit to the region and visa-free entry to China for residents of some countries. And while Chinese direct investment in Latin America for big infrastructure projects has slowed, it remains strong for certain industries.

“Nobody else is offering money for these projects,” Richardson said. “China comes along offering billions—$3.6 billion, with four-and-a-half billion annual revenue profit for this—how can you turn that down? Nobody else is offering anything like that.”

But at the same time, China’s environmental track record, both in the construction of its big infrastructure projects and in the supply chains of its imports, is drawing more criticism from environmental groups, researchers, and residents.

China is the largest importer of commodities linked to deforestation, including soy, beef, and timber, and the second-largest importer of palm oil, which together are responsible for about 40 percent of global deforestation rates. This, critics say, means China has a huge potential exposure to illegal deforestation.

In 2021 China signed on to a global pact to reverse deforestation and land degradation by 2035, acknowledging the role of forests in stabilizing the atmosphere. But recent analyses suggest the country may not follow through. The authors of a 2024 study wrote, “China’s foreign policy stance of non-interference and concerns about its food security are key obstacles.”

The European Union Deforestation Regulation is the most ambitious effort to date to stop commodities that cause deforestation from being imported into European markets. China, one of the biggest exporters of timber products to the EU, recently refused to sign on, citing security concerns related to sharing geolocation data. In November, at the annual United Nations climate conference, held this year for the first time in the Amazon, countries agreed to a $5.5 billion rainforest conservation fund. China said it supports the fund but would not be pledging money to it.

Studies have demonstrated that Chinese imports of illegal timber have climbed along with its involvement in tropical forested regions, including Brazil and Peru.

One study, from the Environmental Investigation Agency in 2018, found that only one-third of tropical timber shipments from Peru to China were properly inspected, and of those that were inspected, 70 percent were found to be from illegally deforested land.

Another study published in May found that Chinese imports of products known to cause deforestation between 2013 and 2022 were linked to the loss of roughly 4 million hectares of tropical forest, nearly 70 percent of which was illegally deforested. The greenhouse gas emissions from these imports were roughly on par with the annual fossil fuel emissions of Spain.

“While China is a global leader in domestic reforestation and renewable energy, this report highlights a critical blind spot of the environmental cost of its imported agricultural and timber commodities,” said Kerstin Canby, a senior director with Forest Trends, in a press statement published along with the report.

In an interview, Canby noted that China has implemented robust reforestation programs within its borders, but that has had a direct impact on vulnerable forests elsewhere, including the Amazon.

“China has been a star, but that has ripple effects,” Canby said. “Everyone’s trying to protect their own forest, but all that does is push demand to those countries that have the least amount of governance, the ones that are not putting in place protections for their own forest.”

Coda

From the rooftop studio where Arce paints landscapes of her coastline view, she can almost touch the netted scaffolding erected outside the walls of her house to keep construction dust and debris from flying into the windows. (It did anyway.)

Every day now, trucks come rumbling, idling at the entrance to the port, which is about 100 feet from her back door. She doesn’t know exactly what’s in them, nor has she or anyone else calculated the damage caused by their payloads. She just knows that soon there will be more of them.

Arce, and many of her neighbors, worry the city’s troubles may get worse as the port expands into its second and third phases of construction over the next several years, and as more roads and railways are built to serve it.

“There is no space for the people who live here. We would have to leave. Who are they going to take out of their houses?” she said. “That’s the next fight.”

She worries that cracks will continue to creep across the walls in the house she’s lived in since she was a baby or that the foundation could crumble one day. Then someone joked that she should ask the Chinese for compensation. Maybe one of the newly delivered electric cars.

Arce cracked a wry smile and looked out at the ocean, which that night was flat and still. “Or a new house,” she said.

This article originally appeared on Inside Climate News, a nonprofit, non-partisan news organization that covers climate, energy, and the environment. Sign up for their newsletter here.

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Researchers find what makes AI chatbots politically persuasive


A massive study of political persuasion shows AIs have, at best, a weak effect.

Roughly two years ago, Sam Altman tweeted that AI systems would be capable of superhuman persuasion well before achieving general intelligence—a prediction that raised concerns about the influence AI could have over democratic elections.

To see if conversational large language models can really sway political views of the public, scientists at the UK AI Security Institute, MIT, Stanford, Carnegie Mellon, and many other institutions performed by far the largest study on AI persuasiveness to date, involving nearly 80,000 participants in the UK. It turned out political AI chatbots fell far short of superhuman persuasiveness, but the study raises some more nuanced issues about our interactions with AI.

AI dystopias

The public debate about the impact AI has on politics has largely revolved around notions drawn from dystopian sci-fi. Large language models have access to essentially every fact and story ever published about any issue or candidate. They have processed information from books on psychology, negotiations, and human manipulation. They can rely on absurdly high computing power in huge data centers worldwide. On top of that, they can often access tons of personal information about individual users thanks to hundreds upon hundreds of online interactions at their disposal.

Talking to a powerful AI system is basically interacting with an intelligence that knows everything about everything, as well as almost everything about you. When viewed this way, LLMs can indeed appear kind of scary. The goal of this new gargantuan AI persuasiveness study was to break such scary visions down into their constituent pieces and see if they actually hold water.

The team examined 19 LLMs, including the most powerful ones like three different versions of ChatGPT and xAI’s Grok-3 beta, along with a range of smaller, open source models. The AIs were asked to advocate for or against specific stances on 707 political issues selected by the team. The advocacy was done by engaging in short conversations with paid participants enlisted through a crowdsourcing platform. Each participant had to rate their agreement with a specific stance on an assigned political issue on a scale from 1 to 100 both before and after talking to the AI.

Scientists measured persuasiveness as the difference between the before and after agreement ratings. A control group had conversations on the same issue with the same AI models—but those models were not asked to persuade them.

“We didn’t just want to test how persuasive the AI was—we also wanted to see what makes it persuasive,” says Chris Summerfield, a research director at the UK AI Security Institute and co-author of the study. As the researchers tested various persuasion strategies, the idea of AIs having “superhuman persuasion” skills crumbled.

Persuasion levers

The first pillar to crack was the notion that persuasiveness should increase with the scale of the model. It turned out that huge AI systems like ChatGPT or Grok-3 beta do have an edge over small-scale models, but that edge is relatively tiny. The factor that proved more important than scale was the kind of post-training AI models received. It was more effective to have the models learn from a limited database of successful persuasion dialogues and have them mimic the patterns extracted from them. This worked far better than adding billions of parameters and sheer computing power.

This approach could be combined with reward modeling, where a separate AI scored candidate replies for their persuasiveness and selected the top-scoring one to give to the user. When the two were used together, the gap between large-scale and small-scale models was essentially closed. “With persuasion post-training like this we matched the Chat GPT-4o persuasion performance with a model we trained on a laptop,” says Kobi Hackenburg, a researcher at the UK AI Security Institute and co-author of the study.

The next dystopian idea to fall was the power of using personal data. To this end, the team compared the persuasion scores achieved when models were given information about the participants’ political views beforehand and when they lacked this data. Going one step further, scientists also tested whether persuasiveness increased when the AI knew the participants’ gender, age, political ideology, or party affiliation. Just like with model scale, the effects of personalized messaging created based on such data were measurable but very small.

Finally, the last idea that didn’t hold up was AI’s potential mastery of using advanced psychological manipulation tactics. Scientists explicitly prompted the AIs to use techniques like moral reframing, where you present your arguments using the audience’s own moral values. They also tried deep canvassing, where you hold extended empathetic conversations with people to nudge them to reflect on and eventually shift their views.

The resulting persuasiveness was compared with that achieved when the same models were prompted to use facts and evidence to back their claims or just to be as persuasive as they could without specifying any persuasion methods to use. I turned out using lots of facts and evidence was the clear winner, and came in just slightly ahead of the baseline approach where persuasion strategy was not specified. Using all sorts of psychological trickery actually made the performance significantly worse.

Overall, AI models changed the participants’ agreement ratings by 9.4 percent on average compared to the control group. The best performing mainstream AI model was Chat GPT 4o, which scored nearly 12 percent followed by GPT 4.5 with 10.51 percent, and Grok-3 with 9.05 percent. For context, static political ads like written manifestos had a persuasion effect of roughly 6.1 percent. The conversational AIs were roughly 40–50 percent more convincing than these ads, but that’s hardly “superhuman.”

While the study managed to undercut some of the common dystopian AI concerns, it highlighted a few new issues.

Convincing inaccuracies

While the winning “facts and evidence” strategy looked good at first, the AIs had some issues with implementing it. When the team noticed that increasing the information density of dialogues made the AIs more persuasive, they started prompting the models to increase it further. They noticed that, as the AIs used more factual statements, they also became less accurate—they basically started misrepresenting things or making stuff up more often.

Hackenburg and his colleagues note that  we can’t say if the effect we see here is causation or correlation—whether the AIs are becoming more convincing because they misrepresent the facts or whether spitting out inaccurate statements is a byproduct of asking them to make more factual statements.

The finding that the computing power needed to make an AI model politically persuasive is relatively low is also a mixed bag. It pushes back against the vision that only a handful of powerful actors will have access to a persuasive AI that can potentially sway public opinion in their favor. At the same time, the realization that everybody can run an AI like that on a laptop creates its own concerns. “Persuasion is a route to power and influence—it’s what we do when we want to win elections or broke a multi-million-dollar deal,” Summerfield says. “But many forms of misuse of AI might involve persuasion. Think about fraud or scams, radicalization, or grooming. All these involve persuasion.”

But perhaps the most important question mark in the  study is the motivation behind the rather high participant engagement, which was needed for the high persuasion scores. After all, even the most persuasive AI can’t move you when you just close the chat window.

People in Hackenburg’s experiments were told that they would be talking to the AI and that the AI would try to persuade them. To get paid, a participant only had to go through two turns of dialogue (they were limited to no more than 10). The average conversation length was seven turns, which seemed a bit surprising given how far beyond the minimum requirement most people went. Most people just roll their eyes and disconnect when they realize they are talking with a chatbot.

Would Hackenburg’s study participants remain so eager to engage in political disputes with random chatbots on the Internet in their free time if there was no money on the table? “It’s unclear how our results would generalize to a real-world context,” Hackenburg says.

Science, 2025. DOI: 10.1126/science.aea3884

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Jacek Krywko is a freelance science and technology writer who covers space exploration, artificial intelligence research, computer science, and all sorts of engineering wizardry.

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