Slashdot reader hackingbear summarizes this report from Bloomberg: China consumed totally 10.4 trillion kilowatt hours (10.4 petaWh) in 2025 according to data from the National Energy Administration. That's the highest annual electricity use ever recorded by a single country, and doubled the amount used by the US and surpassed the combined annual total of the EU, Russia, India and Japan.

The surge in demand for power are results of growth in data centers for artificial intelligence (+17% over 2024) and use of electric vehicles (+48.8%)... However, on a per-capita basis, China uses about 7,300 kWh per person vs about 13,000 kWh per American.
More details from Reuters: China's mostly coal-based thermal power generation fell in 2025 for the first time in 10 years, government data showed on Monday, as growing renewable generation met growth in electricity demand even as overall power usage hit a record. The data is a positive signal for the decarbonisation of China's power sector as China sets a course for carbon emissions to peak by 2030... Thermal electricity, generated mostly by coal-fired capacity with a small amount from natural gas, fell 1% in 2025 to 6.29 trillion kilowatt-hours (kWh), according to the National Bureau of Statistics (NBS). It fell more sharply in December, down by 3.2%, from a year earlier, the data showed... [Though the article notes that coal output still edged up to a record high last year.]

Hydropower grew at a steady pace, up 4.1% in December and rising 2.8 % for the full year, the NBS data showed. Nuclear power output rose 3.1 in December and 7.7% in 2025, respectively. Thermal power generation is unlikely to accelerate in 2026 as renewables growth continues apace.

Climate change has pushed warm-water coral reefs past a point of no return, marking the first time a major climate tipping point has been crossed, according to a report released on Sunday by an international team in advance of the United Nations Climate Change Conference COP30 in Brazil this November. From a report: Tipping points include global ice loss, Amazon rainforest loss, and the possible collapse of vital ocean currents. Once crossed, they will trigger self-perpetuating and irreversible changes that will lead to new and unpredictable climate conditions. But the new report also emphasizes progress on positive tipping points, such as the rapid rollout of green technologies.

"We can now say that we have passed the first major climate tipping point," said Steve Smith, the Tipping Points Research Impact Fellow at the Global Systems Institute and Green Futures Solutions at the University of Exeter, during a media briefing on Tuesday. "But on the plus side," he added, "we've also passed at least one major positive tipping point in the energy system," referring to the maturation of solar and wind power technologies.

The world is entering a "new reality" as global temperatures will inevitably overshoot the goal of staying within 1.5C of pre-industrial averages set by the Paris Climate Agreement in 2015, warns the Global Tipping Points Report 2025, the second iteration of a collaboration focused on key thresholds in Earth's climate system.

Solar panels in space could cut Europe's terrestrial renewable energy needs by 80% by 2050, a study has found. The Guardian: Using a detailed computer model of the continent's future power grid, the researchers found that a system of space-based panels designed by Nasa could reduce the cost of the whole European power system by as much as 15%. It could also cut battery use by more than two-thirds.

The study, led by researchers at King's College London, is the first to assess the possible impact of space solar energy on Europe. The space-based solar power (SBSP) panels that yielded the positive results uses a heliostat design. The design, which the system imitates, uses mirror-like reflectors to collect sunlight in orbit. The sunlight is then transmitted to stations on Earth and converted to electricity before it is delivered to an energy grid. The computer model of the continent's power grid spans 33 countries, and simulates electricity demand, generation and storage to identify the lowest-cost option to meet Europe's electricity needs.

What happens if you track how much heat enters Earth's atmosphere and how much heat leaves?

You discover that Earth's energy budget "is now well and truly out of balance," three climate researchers write at The Conversation: Our recent research found this imbalance has more than doubled over the last 20 years. Other researchers have come to the same conclusions. This imbalance is now substantially more than climate models have suggested... These findings suggest climate change might well accelerate in the coming years...

[T]he burning of coal, oil and gas has now added more than two trillion tonnes of carbon dioxide and other greenhouse gases to the atmosphere. These trap more and more heat, preventing it from leaving. Some of this extra heat is warming the land or melting sea ice, glaciers and ice sheets. But this is a tiny fraction. Fully 90% has gone into the oceans due to their huge heat capacity...

The doubling of the energy imbalance has come as a shock, because the sophisticated climate models we use largely didn't predict such a large and rapid change. Typically, the models forecast less than half of the change we're seeing in the real world. We don't yet have a full explanation. But new research suggests changes in clouds is a big factor. Clouds have a cooling effect overall. But the area covered by highly reflective white clouds has shrunk, while the area of jumbled, less reflective clouds has grown.
While we don't know why the cloud are changing, it "might be part of a trend caused by global warming itself, that is, a positive feedback on climate change. These findings suggest recent extremely hot years are not one-offs but may reflect a strengthening of warming over the coming decade or longer...."

"We've known the solution for a long time: stop the routine burning of fossil fuels and phase out human activities causing emissions such as deforestation."

A new study "adds a whole extra level of detail to our understanding of caffeine's impact on the brain during sleep," reports ScienceAlert: Caffeine was shown to increase brain signal complexity, and shift the brain closer to a state of 'criticality', in tests run by researchers from the University of Montreal in Canada. This criticality refers to the brain being balanced between structure and flexibility, thought to be the most efficient state for processing information, learning, and making decisions. However, this state might prevent restful sleep, the researchers suggest. The caffeine isn't just keeping us alert, but actually changing how the brain is operating. What's more, they found younger adults aged 20 to 27 were more greatly affected in this way...

When it comes to the different reactions across different ages, the researchers suggest that changes in the brain as we age might be responsible. Adenosine molecules gradually build up in the brain during the day, leading to a greater feeling of fatigue as bedtime approaches. Caffeine works by blocking the receptors that adenosine interacts with, giving us a temporary jolt of energy. Adenosine receptors are more abundant in younger brains, which may explain why younger people seem to be more sensitive to caffeine's powers. That includes both the positive energizing effects, and the negative effects of keeping the brain too active overnight.

TechCrunch reports: The world's only net-positive fusion experiment has been steadily ramping up the amount of power it produces, TechCrunch has learned.

In recent attempts, the team at the U.S. Department of Energy's National Ignition Facility (NIF) increased the yield of the experiment, first to 5.2 megajoules and then again to 8.6 megajoules, according to a source with knowledge of the experiment. The new results are significant improvements over the historic experiment in 2022, which was the first controlled fusion reaction to generate more energy than the it consumed. The 2022 shot generated 3.15 megajoules, a small bump over the 2.05 megajoules that the lasers delivered to the BB-sized fuel pellet.

None of the shots to date have been effective enough to feed electrons back into the grid, let alone to offset the energy required to power the entire facility — the facility wasn't designed to do that. The first net-positive shot, for example, required 300 megajoules to power the laser system alone. But they are continued proof that controlled nuclear fusion is more than hypothetical.

"Researchers have created the first laboratory analog of the 'black hole bomb'," reports ScienceAlert, "a theoretical concept developed by physicists in the 1970s..."

There's no black hole involved; their experiment just simulates the "electromagnetic analogue" of the theoretical concept — the "exponential runaway amplification of spontaneously generated electromagnetic modes."

Or, as ScienceAlert puts it, "It doesn't, just to set your mind at ease, pose any danger. It consists of a rotating aluminum cylinder, placed inside layers of coils that generate magnetic fields that rotate around it, at controllable speeds." As Roger Penrose proposed in 1971, the powerful rotational energy of a spinning black hole could be used to amplify the energy of nearby particles. Then, physicist Yakov Zel'Dovich figured out that you didn't need a black hole to see this phenomenon in action. An axially symmetrical body rotating in a resonance chamber, he figured, could produce the same energy transfer and amplification, albeit on a much smaller scale. Later work by other physicists found that, if you enclose the entire apparatus in a mirror, a positive feedback loop is generated, amplifying the energy until it explodes from the system.

This concept was named the black hole bomb, and a team of physicists led by Marion Cromb of the University of Southampton in the UK now claim to have brought it to life. A paper describing their experiment has been uploaded to preprint server arXiv... [W]hat the team's experiment does is simulate it, using magnetic fields as a proxy for the particles, with the coils around the system acting as the reflector to produce the feedback loop. When they ran the experiment, they found that, when the cylinder is rotating faster than, and in the same direction as, the magnetic field, the magnetic field is amplified, compared to when there is no cylinder. When the cylinder rotates more slowly than the magnetic field, however, the magnetic field is dampened. This is a really interesting result, because it demonstrates a very clear amplification effect, based on the theories described decades ago...

Because we can't probe black holes directly, analogs such as this are an excellent way to understand their properties... [T]he experiment could represent a significant step towards better understanding the physics of the most gravitationally extreme objects in the Universe.
"The exponential amplification from noise supports theoretical investigations into black hole instabilities," the researchers write, "and is promising for the development of future experiments to observe quantum friction in the form of the Zeldovich effect seeded by the quantum vacuum..."

Long-time Slashdot reader Baron_Yam writes: No more burning fossil fuels, playing with fissile material, damming rivers, erecting wind mills, or making solar panels. All of our energy needs could potentially be supplied by the angular kinetic energy of the Earth — and because of the mass of the planet, doing so would slow its rotation down by a mere 7ms per century. [Which is similar to speed changes caused by natural phenomena such as the Moon's pull and changing dynamics inside the planet's core."]

Normally this would be considered impossible as the Earth's large and uniform field does not induce a current in conductors, but researchers believe that a hollow cylinder of manganese, zinc and iron can alter the interaction with our planetary magnetic field and allow the extraction of energy from it. So far, the results are positive but still below the level where they cannot be explained by multiple possible causes of experimental error. Further research is required to confirm the effect.
"The effect was identified only in a carefully crafted device and generated just 17 microvolts," reports Scientific American, "a fraction of the voltage released when a single neuron fires — making it hard to verify that some other effect isn't causing the observations."

But if another group can verify the results, the experiment's lead says the next logical step is trying to scale up the device to generate a useful amount of energy.

In the first 11 months of 2024, solar energy generation in the US grew by 30%, enabling wind and solar combined to surpass coal for the first time. However, as Ars Technica's John Timmer reports, "U.S. energy demand saw an increase of nearly 3 percent, which is roughly double the amount of additional solar generation." He continues: "Should electric use continue to grow at a similar pace, renewable production will have to continue to grow dramatically for a few years before it can simply cover the added demand." From the report: Another way to look at things is that, between the decline of coal use and added demand, the grid had to generate an additional 136 TW-hr in the first 11 months of 2024. Sixty-three of those were handled by an increase in generation using natural gas; the rest, or slightly more than half, came from emissions-free sources. So, renewable power is now playing a key role in offsetting demand growth. While that's a positive, it also means that renewables are displacing less fossil fuel use than they might.

In addition, some of the growth of small-scale solar won't show up on the grid, since it offset demand locally, and so also reduced some of the demand for fossil fuels. Confusing matters, this number can also include things like community solar, which does end up on the grid; the EIA doesn't break out these numbers. We can expect next year's numbers to also show a large growth in solar production, as the EIA says that the US saw record levels of new solar installations in 2024, with 37 Gigawatts of new capacity. Since some of that came online later in the year, it'll produce considerably more power next year. And, in its latest short-term energy analysis, the EIA expects to see over 20 GW of solar capacity added in each of the next two years. New wind capacity will push that above 30 GW of renewable capacity each of these years.

That growth will, it's expected, more than offset continued growth in demand, although that growth is expected to be somewhat slower than we saw in 2024. It also predicts about 15 GW of coal will be removed from the grid during those two years. So, even without any changes in policy, we're likely to see a very dynamic grid landscape over the next few years. But changes in policy are almost certainly on the way.

"As large-scale solar farms crop up across the U.S.," reports ABC News, "the booming solar industry has found an unlikely mascot..." Sheep. In Milam County, outside Austin [Texas], SB Energy operates the fifth-largest solar project in the country, capable of generating 900 megawatts of power across 4,000 acres (1,618 hectares). How do they manage all that grass? With the help of about 3,000 sheep, which are better suited than lawnmowers to fit between small crevices and chew away rain or shine. The proliferation of sheep on solar farms is part of a broader trend — solar grazing — that has exploded alongside the solar industry. Agrivoltaics, a method using land for both solar energy production and agriculture, is on the rise with more than 60 solar grazing projects in the U.S., according to the National Renewable Energy Laboratory.

The American Solar Grazing Association says 27 states engage in the practice. "The industry tends to rely on gas-powered mowers, which kind of contradicts the purpose of renewables," SB Energy asset manager James Hawkins said... Because solar fields use sunny, flat land that is often ideal for livestock grazing, the power plants have been used in coordination with farmers rather than against them....

Some agriculture experts say [solar sheepherders'] success reflects how solar farms have become a boon for some ranchers. Reid Redden, a sheep farmer and solar vegetation manager in San Angelo, Texas, said a successful sheep business requires agricultural land that has become increasingly scarce. "Solar grazing is probably the biggest opportunity that the sheep industry had in the United States in several generations," Redden said. The response to solar grazing has been overwhelmingly positive in rural communities near South Texas solar farms where Redden raises sheep for sites to use, he said. "I think it softens the blow of the big shock and awe of a big solar farm coming in," Redden said.

AI is coming for your job: 41% of employers intend to downsize their workforce as AI automates certain tasks, a World Economic Forum survey showed Wednesday. From a report: Out of hundreds of large companies surveyed around the world, 77% also said they were planning to reskill and upskill their existing workers between 2025-2030 to better work alongside AI, according to findings published in the WEF's Future of Jobs Report. But, unlike the previous, 2023 edition, this year's report did not say that most technologies, including AI, were expected to be "a net positive" for job numbers.

"Advances in AI and renewable energy are reshaping the (labor) market -- driving an increase in demand for many technology or specialist roles while driving a decline for others, such as graphic designers," the WEF said in a press release ahead of its annual meeting in Davos later this month. Writing in the wide-ranging report, Saadia Zahidi, the forum's managing director, highlighted the role of generative AI in reshaping industries and tasks across all sectors. The technology can create original text, images and other content in response to prompts from users.

A six-month German pilot of a four-day workweek across 45 companies demonstrated that most employees experienced reduced stress and maintained productivity, with some companies adopting optimized processes and digital tools to enhance efficiency. The report says 70% of the firms plan to continue the model. DW News reports: Earlier this year, some 45 German firms launched a 4-day workweek project to find out if such a fundamental change to how we work can achieve positive results for employers and employees. For six months, and closely watched by researchers from Munster University in Germany, the volunteer companies allowed their employees to work fewer hours without reducing their salaries. The pilot run was initiated by Berlin-based management consultancy, Intraprenor, in collaboration with the nonprofit organization 4 Day Week Global (4DWG). [...]

Julia Backmann, the scientific lead of the pilot study, says employees generally felt better with fewer hours and remained just as productive as they were with a five-day week, and, in some cases, were even more productive. Participants reported significant improvements in mental and physical health, she told DW, and showed less stress and burnout symptoms, as confirmed by data from smartwatches tracking daily stress minutes. According to Backmann's findings, two out of three employees reported fewer distractions because processes were optimized. Over half of the companies redesigned their meetings to make them less frequent and shorter, while one in four companies adopted new digital tools to boost efficiency. "The potential of shorter working hours seems to be stifled by complex processes, too many meetings, and low digitalization," said Carsten Meier from Intraprenor.

The study has also shown that participants were more physically active during the 4-day workweek, and they slept an average of 38 minutes more per week than those in the five-day control group. However, monthly sick days only dropped slightly, a statistically insignificant difference compared to the same period a year ago. Marika Platz from Munster University, who analyzed the data, said she was surprised at the number of sick days because similar studies in other countries showed a significant reduction. Another surprise, she told DW, was the lack of environmental benefits from reduced working hours during the German test as other countries reported a positive impact from offices that could be shut down completely for one day, and fewer commutes to work that resulted in higher energy savings. The reason for this was probably that some German employees took advantage of the long weekends to travel, she said, which reduced any potential energy savings. Study director Backmann stressed that the study was not about advocating for a blanket rollout of the 4-day workweek across all sectors, but rather exploring "an innovative work-time model and its effects."

Carsten Meier from the Intraprenor consultancy added that the positive results of the trial cannot be "automatically translated" into similar gains for every company in Germany.

"A technology pioneered by Benjamin Franklin is being revived to build more efficient electric motors," reports the Wall Street Journal, "an effort in its nascent stage that has the potential to be massive." A handful of scientists and engineers — armed with materials and techniques unimaginable in the 1700s — are creating modern versions of Franklin's "electrostatic motor," that are on the cusp of commercialization... Franklin's "electrostatic motor" uses alternating positive and negative charges — the same kind that make your socks stick together after they come out of the dryer — to spin an axle, and doesn't rely on a flow of current like conventional electric motors. Every few years, an eager Ph.D. student or engineer rediscovers this historical curiosity. But other than applications in tiny pumps and actuators etched on microchips, where this technology has been in use for decades, their work hasn't made it out of the lab.

Electrostatic motors have several potentially huge advantages over regular motors. They are up to 80% more efficient than conventional motors after all the dependencies of regular electric motors are added in. They could also allow new kinds of control and precision in robots, where they could function more like our muscles. And they don't use rare-earth elements because they don't have permanent magnets, and require as little as 5% as much copper as a conventional motor. Both materials have become increasingly scarce and expensive over the past decade, and supply chains for them are dominated by China.
"It's reminiscent of the early 1990s, when Sony began to produce and sell the first rechargeable lithium-ion batteries, a breakthrough that's now ubiquitous..." according to the article. "These motors could lead to more efficient air-conditioning systems, factories, logistics hubs and data centers, and — since they can double as generators — better ways of generating renewable energy. They might even show up in tiny surveillance drones."

And the article points out that C-Motive Technologies, a 16-person startup in Wisconsin, is already "reaching out to companies, hoping to get their motors out into the real world." ("So far, FedEx and Rockwell Automation, the century-old supplier of automation to factories, are among those testing their motors.") C-Motive's founders discovered that a number of technologies had matured enough that, when combined, could yield electrostatic motors competitive with conventional ones. These enabling technologies include super fast-switching power electronics — like those in modern electric vehicles — that can toggle elements of the motor between states of positive and negative charge very quickly... Dogged exploration of combinations of various readily available industrial organic fluids led to a proprietary mix that can both multiply the strength of the electric field and insulate the motor's spinning parts from each other — all without adding too much friction — says C-Motive Chief Executive Matt Maroon.

"Samsung's latest solid-state battery technology will power up premium EVs first, giving them up to 621 miles of range," writes PC Magazine: The new batteries — which promise to improve vehicle range, decrease charging times, and eliminate risk of battery fires — could go into mass production as soon as 2027. Multiple automakers have been reportedly testing samples. Samsung did not list any by name but it's worked with Hyundai, Stellantis, and General Motors, among others. "We supplied samples to customers from the end of last year to the beginning of this year and are receiving positive feedback," Samsung SDI VP Koh Joo-young said at SNE Battery Day 2024 in Seoul, according to Korean outlet The Elec and translated by Google.

Perhaps unsurprisingly, the batteries won't be cheap. They will initially go in "super premium EVs" and will offer 900 to 1,000 kilometers (559-621 miles) of range and improved safety... Samsung's presentation also reiterated previously announced plans to create batteries that can charge in nine minutes and last 20 years by 2029.
More details from Notebookcheck: According to Samsung SDI's VP, automakers are interested in its solid-state battery packs because they are smaller, lighter, and much safer than what's in current electric cars. Apparently, they are also rather expensive to produce, since it warns that they will first go into the "super premium" EV segment. Those Samsung defines as luxury electric cars that can cover more than 600 miles on a charge.

Samsung's oxide solid-state battery technology is rated for an energy density of about 500 Wh/kg, which is about double the density of mainstream EV batteries. Those have capacities that already allow more than 300 miles on a charge, so 600 miles of range in a similar footprint is not out of the question, but the issue is production costs.
Thanks to Slashdot reader npetrov for sharing the news.

Physicists have been exploring the theoretical possibility of warp drives, which could propel spaceships faster than light by compressing spacetime. A new study published in the Open Journal of Astrophysics simulates the gravitational waves such a drive might emit if it failed, showing potential detectable signals by future high-frequency instruments and advancing our understanding of exotic spacetimes. Phys.Org reports: The results are fascinating. The collapsing warp drive generates a distinct burst of gravitational waves, a ripple in spacetime that could be detectable by gravitational wave detectors that normally target black hole and neutron star mergers. Unlike the chirps from merging astrophysical objects, this signal would be a short, high-frequency burst, and so current detectors wouldn't pick it up. However, future higher-frequency instruments might, and although no such instruments have yet been funded, the technology to build them exists. This raises the possibility of using these signals to search for evidence of warp drive technology, even if we can't build it ourselves.

The study also delves into the energy dynamics of the collapsing warp drive. The process emits a wave of negative energy matter, followed by alternating positive and negative waves. This complex dance results in a net increase in the overall energy of the system, and in principle could provide another signature of the collapse if the outgoing waves interacted with normal matter.

The artificial intelligence revolution will demand more electricity, warns the Washington Post. "Much more..."

They warn that the "voracious" electricity consumption of AI is driving an expansion of fossil fuel use in America — "including delaying the retirement of some coal-fired plants." As the tech giants compete in a global AI arms race, a frenzy of data center construction is sweeping the country. Some computing campuses require as much energy as a modest-sized city, turning tech firms that promised to lead the way into a clean energy future into some of the world's most insatiable guzzlers of power. Their projected energy needs are so huge, some worry whether there will be enough electricity to meet them from any source... A ChatGPT-powered search, according to the International Energy Agency, consumes almost 10 times the amount of electricity as a search on Google. One large data center complex in Iowa owned by Meta burns the annual equivalent amount of power as 7 million laptops running eight hours every day, based on data shared publicly by the company...

[Tech companies] argue advancing AI now could prove more beneficial to the environment than curbing electricity consumption. They say AI is already being harnessed to make the power grid smarter, speed up innovation of new nuclear technologies and track emissions.... "If we work together, we can unlock AI's game-changing abilities to help create the net zero, climate resilient and nature positive works that we so urgently need," Microsoft said in a statement.

The tech giants say they buy enough wind, solar or geothermal power every time a big data center comes online to cancel out its emissions. But critics see a shell game with these contracts: The companies are operating off the same power grid as everyone else, while claiming for themselves much of the finite amount of green energy. Utilities are then backfilling those purchases with fossil fuel expansions, regulatory filings show... heavily polluting fossil fuel plants that become necessary to stabilize the power grid overall because of these purchases, making sure everyone has enough electricity.
The article quotes a project director at the nonprofit Data & Society, which tracks the effect of AI and accuses the tech industry of using "fuzzy math" in its climate claims. "Coal plants are being reinvigorated because of the AI boom," they tell the Washington Post. "This should be alarming to anyone who cares about the environment."

The article also summarzies a recent Goldman Sachs analysis, which predicted data centers would use 8% of America's total electricity by 2030, with 60% of that usage coming "from a vast expansion in the burning of natural gas. The new emissions created would be comparable to that of putting 15.7 million additional gas-powered cars on the road." "We all want to be cleaner," Brian Bird, president of NorthWestern Energy, a utility serving Montana, South Dakota and Nebraska, told a recent gathering of data center executives in Washington, D.C. "But you guys aren't going to wait 10 years ... My only choice today, other than keeping coal plants open longer than all of us want, is natural gas. And so you're going see a lot of natural gas build out in this country."
Big Tech responded by "going all in on experimental clean-energy projects that have long odds of success anytime soon," the article concludes. "In addition to fusion, they are hoping to generate power through such futuristic schemes as small nuclear reactors hooked to individual computing centers and machinery that taps geothermal energy by boring 10,000 feet into the Earth's crust..." Some experts point to these developments in arguing the electricity needs of the tech companies will speed up the energy transition away from fossil fuels rather than undermine it. "Companies like this that make aggressive climate commitments have historically accelerated deployment of clean electricity," said Melissa Lott, a professor at the Climate School at Columbia University.

A new study by astrophysicist Richard Lieu suggests that gravity can exist without mass, proposing thin, shell-like layers of 'topological defects' as an alternative to dark matter for explaining the gravitational binding of galaxies. This theory posits that these defects create a gravitational force without detectable mass, potentially eliminating the need for dark matter in current cosmological models. Clare Watson reports via ScienceAlert: Lieu started out trying to find another solution to the Einstein field equations, which relate the curvature of space-time to the presence of matter within it. As Einstein described in his 1915 theory of general relativity, space-time warps around bundles of matter and streams of radiation in the Universe, depending on their energy and momentum. That energy is, of course, related to mass in Einstein's famous equation: E=mc2. So an object's mass is linked to its energy, which bends space-time -- and this curvature of space-time is what Einstein described as gravity, a notch more sophisticated than Newton's 17th-century approximation of gravity as a force between two objects with mass. In other words, gravity seems inextricably linked to mass. Not so, posits Lieu.

In his workings, Lieu set about solving a simplified version of the Einstein field equations that allows for a finite gravitation force in the absence of any detectable mass. He says his efforts were "driven by my frustration with the status quo, namely the notion of dark matter's existence despite the lack of any direct evidence for a whole century." Lieu's solution consists of shell-shaped topological defects that might occur in very compact regions of space with a very high density of matter. These sets of concentric shells contain a thin layer of positive mass tucked inside an outer layer of negative mass. The two masses cancel each other out, so the total mass of the two layers is exactly zero. But when a star lies on this shell, it experiences a large gravitational force dragging it towards the center of the shell. "The contention of my paper is that at least the shells it posits are massless," Lieu says. If those contentious suggestions bear any weight, "there is then no need to perpetuate this seemingly endless search for dark matter," Lieu adds.

The next question, then, is how to possibly confirm or refute the shells Lieu has proposed through observations. "The increasing frequency of sightings of ring and shell-like formation of galaxies in the Universe lends evidence to the type of source being proposed here," Lieu writes in his paper. Although he admits that his proposed solution is "highly suggestive" and cannot alone discredit the dark matter hypothesis. "It could be an interesting mathematical exercise at best," Lieu concludes. "But it is the first [mathematical] proof that gravity can exist without mass." The study has been published in Monthly Notices of the Royal Astronomical Society.

The thinktank InfluenceMap produces "data-driven analysis on how business and finance are impacting the climate crisis." Their web site says their newest report documents "How automaker lobbying threatens the global transition to electric vehicles." This report analyses the climate policy engagement strategies of fifteen of the largest global automakers in seven key regions (Australia, EU, Japan, India, South Korea, UK, US). It shows how even in countries where major climate legislation has recently passed, such as the US and Australia, the ambition of these policies has been weakened due to industry pressure. All fifteen automakers, except Tesla, have actively advocated against at least one policy promoting electric vehicles. Ten of the fifteen showed a particularly high intensity of negative engagement and scored a final grade of D or D+ by InfluenceMap's methodology. Toyota is the lowest-scoring company in this analysis, driving opposition to climate regulations promoting battery electric vehicles in multiple regions, including the US, Australia and UK. Of all automakers analyzed, only Tesla (scoring B) is found to have positive climate advocacy aligned with science-based policy.
CleanTechnica writes that Toyota "led on hybrid vehicles (and still does), so it's actually not surprising that it has been opposed to the next stage of climate-cutting auto evolution — it's clinging on to its lead rather than continuing to innovate for a new era."

More from InfluenceMap: Only three of fifteen companies — Tesla, Mercedes Benz and BMW — are forecast to produce enough electric vehicles by 2030 to meet the International Energy Agency's updated 1.5 degreesC pathway of 66% electric vehicle (battery electric, fuel cell and plug-in hybrids) sales according to InfluenceMap's independent analysis of industry-standard data from February 2024. Current industry forecasts analyzed for this report show automaker production will reach only 53% electric vehicles in 2030. Transport is the third-largest source of greenhouse gas emissions globally, and road transport is failing to decarbonize at anywhere near the rate of many other industries. InfluenceMap's report also finds that Japanese automakers are the least prepared for an electric vehicle transition and are engaging the hardest against it.
"InfluenceMap highlights that these anti-EV efforts in the industry are often coming from industry associations rather than coming directly from automakers, shielding them a bit from inevitable public backlash," writes CleanTechnica.

"Every automaker included in the study except Tesla remains a member of at least two of these groups," InfluenceMap reports, "with most automakers a member of at least five."

Thanks to Slashdot reader Baron_Yam for sharing the news.

Clare Watson reports via ScienceAlert: By replacing the hazardous chemical electrolytes used in commercial batteries with water, scientists have developed a recyclable 'water battery' -- and solved key issues with the emerging technology, which could be a safer and greener alternative. 'Water batteries' are formally known as aqueous metal-ion batteries. These devices use metals such as magnesium or zinc, which are cheaper to assemble and less toxic than the materials currently used in other kinds of batteries.

Batteries store energy by creating a flow of electrons that move from the positive end of the battery (the cathode) to the negative end (the anode). They expend energy when electrons flow the opposite way. The fluid in the battery is there to shuttle electrons back and forth between both ends. In a water battery, the electrolytic fluid is water with a few added salts, instead of something like sulfuric acid or lithium salt. Crucially, the team behind this latest advancement came up with a way to prevent these water batteries from short-circuiting. This happens when tiny spiky metallic growths called dendrites form on the metal anode inside a battery, busting through battery compartments. [...]

To inhibit this, the researchers coated the zinc anode of the battery with bismuth metal, which oxidizes to form rust. This creates a protective layer that stops dendrites from forming. The feature also helps the prototype water batteries last longer, retaining more than 85 percent of their capacity after 500 cycles, the researchers' experiments showed. According to Royce Kurmelovs at The Guardian, the team has so far developed water-based prototypes of coin-sized batteries used in clocks, as well as cylindrical batteries similar to AA or AAA batteries. The team is working to improve the energy density of their water batteries, to make them comparable to the compact lithium-ion batteries found inside pocket-sized devices. Magnesium is their preferred material, lighter than zinc with a greater potential energy density. [I]f magnesium-ion batteries can be commercialized, the technology could replace bulky lead-acid batteries within a few years. The study has been published in the journal Advanced Materials.

It's the 50th anniversary of Devo, the geek-friendly, dystopia-themed band that combined synthesizers with showmanship, first founded in 1973.

As a new documentary about the group celebrates its Sundance world premiere, the Los Angeles Times explores how the band made innovative use of the technology of its time: With their yellow radiation suits, red "energy dome" hats and manic energy, part playful and part angry, the band Devo combined the futuristic glamour of new wave with atomic-age anxieties and post-'60s disillusionment.... Uniquely, the band developed a fully formed, intricate internal philosophy and mythology built around the idea that humans were "de-evolving" by becoming dumber and less sophisticated. The mascot of the band, known as "Booji Boy," was an infantile urchin in a rubber mask...

Was there an idea to document the band right from the very start? It's incredible that there's footage of the very first show in 1973.

GERALD CASALE: We were that delusional, yes. And we were trying to document ourselves when nobody was interested in doing that. And when it was quite expensive and clumsy to do it. You're dealing with Sony U-matic reel-to-reel recorders and big heavy cameras and a scarcity of equipment and very little interest. I mean, my God, if a Devo of now existed like we did, then clearly, there'd be a million cellphone videos.

MARK MOTHERSBAUGH: [...] Bob was the first of us to direct a video, back when he was in high school. Bob and me, our dad, starting when we were like babies, like 1 year old, he'd bring out an 8-millimeter camera that didn't have sound, and so he shot hundreds and hundreds of these films through the years, just family stuff. So we always kind of liked that. And Jerry was doing films at Kent State with Chuck Statler before Chuck said, "Hey, let's do a film with a couple of the songs in it." So we were always audio-visual. We were always thinking in both worlds...

[DOCUMENTARY DIRECTOR] CHRIS SMITH: One of my favorite details in looking through the old footage is, there's an early show that was recorded in black-and-white, and they have such limited materials to work with, yet they do this thing where the light goes on and off on both sides of the stage. And to me it was so emblematic of where they were going because they were making something that you hadn't seen before that was super creative and visually distinctive and interesting out of something we all had to work with... You could see in that footage, the inventiveness that wasn't a result of means — it was something that was just created out of what they had to work with at that time.

MARK MOTHERSBAUGH: [...] Sonically, a lot of what we did was just related to the fact that Bob Mothersbaugh bought a four-track TEAC. So we had this machine that could record four little skinny channels on a quarter-inch tape. It was an amateur home-tape machine, but it made us think about our parts, because we thought, well, OK, you're only going to get to do the bass on one track, and the guitar on one track and the drums on one track and the synth. You're not going to do all these overdubs. We had to think about it, what was an essential part. So we'd work on the song till you could play it just in one pass. Everything essential. I think it really made the early stuff sound really strong because of that.
You really get a sense of that on their 1978 song "Mongoloid." But the 2023 documentary's director doesn't see his film as an ending bookmark for the band. "They're still touring. They're all still actively creatively pursuing many different things, as I hope that you would expect after seeing the film."

And speaking specifically about the documentary, Mark Mothersbaugh says Booji Boy "describes it as a halfway point to the year of 2073, where we'll celebrate the 100-year anniversary." Booji Boy also says the next 50 years will be more about action. "And it'll be about positive mutation. Mutate, don't stagnate."