The world's largest rail vehicle manufacturer has rolled out a zero-emissions train running on hydrogen fuel cells with a supercapacitor buffer. The four-car train is capable of 100 mph (160 km/h), making it the fastest hydrogen train to date. New Atlas reports: Jointly developed by state-owned industrial monolith CRRC and Chengdu Rail Transit, this is China's first hydrogen-powered passenger train, offering a range of 373 miles (600 km), and emitting nothing but water. It's capable of self-driving, with 5G communications, automatic wake-up, start and stop, and return to depot functionality. Germany is ahead on this kind of thing, with some 14 hydrogen-fueled Alstom trains already in service as of last year. The CRRC machine can beat the German trains for speed by around 20 km/h (12 mph), but the German trains currently offer a much greater range at ~620 miles (1,000 km). According to Information Trends, there are just over 1,000 hydrogen stations in the world -- one-third of them being in China.

Blizzard will suspend games in China because it can't reach an agreement with its licensing and publishing partner NetEase, it said in a press release. World of Warcraft, Hearthstone, Overwatch 2, Starcraft, Heroes of the Storm, Diablo III, and Warcraft III: Reforged won't be available in China after January 23, 2023. The Verge reports: Blizzard will suspend the sale of games and offer guidance to Chinese players "in the coming days," according to the press release, which did not offer a specific timeline. Development of Diablo Immortal is in a separate agreement and will continue, NetEase said in a statement. Upcoming releases, including the latest World of Warcraft expansion, Dragonflight, and the second season of Overwatch 2, "will proceed later this year," according to Blizzard. "We're immensely grateful for the passion our Chinese community has shown throughout the nearly 20 years we've been bringing our games to China," said Blizzard Entertainment president Mike Ybarra in the press release. "We are looking for alternatives to bring our games back to players in the future."

Far below our feet, a giant may have started moving against us. From a report: Earth's inner core, a hot iron ball the size of Pluto, has stopped spinning in the same direction as the rest of the planet and might even be rotating the other way, research suggested on Monday. Roughly 5,000 kilometres (3,100 miles) below the surface we live on, this "planet within the planet" can spin independently because it floats in the liquid metal outer core. Exactly how the inner core rotates has been a matter of debate between scientists -- and the latest research is expected to prove controversial. What little is known about the inner core comes from measuring the tiny differences in seismic waves -- created by earthquakes or sometimes nuclear explosions -- as they pass through the middle of the Earth.

Seeking to track the inner core's movements, new research published in the journal Nature Geoscience analysed seismic waves from repeating earthquakes over the last six decades. The study's authors, Xiaodong Song and Yi Yang of China's Peking University, said they found that the inner core's rotation "came to near halt around 2009 and then turned in an opposite direction." "We believe the inner core rotates, relative to the Earth's surface, back and forth, like a swing," they told AFP. "One cycle of the swing is about seven decades", meaning it changes direction roughly every 35 years, they added. They said it previously changed direction in the early 1970s, and predicted the next about-face would be in the mid-2040s. The researchers said this rotation roughly lines up with changes in what is called the "length of day" -- small variations in the exact time it takes Earth to rotate on its axis.

The BBC reports: It was an innocuous-looking photograph that turned out to be the downfall of Zheng Xiaoqing, a former employee with energy conglomerate General Electric Power. According to a Department of Justice indictment, the US citizen hid confidential files stolen from his employers in the binary code of a digital photograph of a sunset, which Mr Zheng then mailed to himself. It was a technique called steganography, a means of hiding a data file within the code of another data file. Mr Zheng utilised it on multiple occasions to take sensitive files from GE....

The information Zheng stole was related to the design and manufacture of gas and steam turbines, including turbine blades and turbine seals. Considered to be worth millions, it was sent to his accomplice in China. It would ultimately benefit the Chinese government, as well as China-based companies and universities. Zheng was sentenced to two years in prison earlier this month. It is the latest in a series of similar cases prosecuted by US authorities. In November Chinese national Xu Yanjun, said to be a career spy, was sentenced to 20 years in prison for plotting to steal trade secrets from several US aviation and aerospace companies — including GE.

It is part of a broader struggle as China strives to gain technological knowhow to power its economy and its challenge to the geopolitical order, while the US does its best to prevent a serious competitor to American power from emerging.... Last July FBI director Christopher Wray told a gathering of business leaders and academics in London that China aimed to "ransack" the intellectual property of Western companies so it can speed up its own industrial development and eventually dominate key industries. He warned that it was snooping on companies everywhere "from big cities to small towns — from Fortune 100s to start-ups, folks that focus on everything from aviation, to AI, to pharma".

At the time, China's then foreign ministry spokesman Zhao Lijian said Mr Wray was "smearing China" and had a "Cold War mentality".
Thanks to long-time Slashdot reader schwit1 for sharing the article.

An anonymous reader quotes a report from NBC News: For nearly a year and a half, a Massachusetts high school has been lit up around the clock because the district can't turn off the roughly 7,000 lights in the sprawling building. The lighting system was installed at Minnechaug Regional High School when it was built over a decade ago and was intended to save money and energy. But ever since the software that runs it failed on Aug. 24, 2021, the lights in the Springfield suburbs school have been on continuously, costing taxpayers a small fortune.

"We are very much aware this is costing taxpayers a significant amount of money," Aaron Osborne, the assistant superintendent of finance at the Hampden-Wilbraham Regional School District, told NBC News. "And we have been doing everything we can to get this problem solved." Osborne said it's difficult to say how much money it's costing because during the pandemic and in its aftermath, energy costs have fluctuated wildly. "I would say the net impact is in the thousands of dollars per month on average, but not in the tens of thousands," Osborne said. That, in part, is because the high school uses highly efficient fluorescent and LED bulbs, he said. And, when possible, teachers have manually removed bulbs from fixtures in classrooms while staffers have shut off breakers not connected to the main system to douse some of the exterior lights.

But there's hope on the horizon that the lights at Minnechaug will soon be dimmed. Paul Mustone, president of the Reflex Lighting Group, said the parts they need to replace the system at the school have finally arrived from the factory in China and they expect to do the installation over the February break. "And yes, there will be a remote override switch so this won't happen again," said Mustone, whose company has been in business for more than 40 years.

Amazon has started its biggest-ever round of jobs cuts -- a culling that will ultimately affect 18,000 workers around the globe. From a report: Amazon began notifying employees by email early Wednesday, Doug Herrington, the company's worldwide retail chief, said in a memo. He said the company aimed to communicate with all laid-off workers in the US, Canada and Costa Rica by the end of the day. Notifications in China will be sent after the Chinese New Year, and in other regions the company must consult with employee representatives before finalizing layoffs. The world's largest e-commerce company is grappling with slowing online sales growth and bracing for a possible recession that could affect the spending power of its customers. Microsoft announced it was cutting 10,000 jobs Wednesday, becoming the latest in a long line of tech companies to trim its ranks.

Herrington said Amazon's cuts were part of an effort to lower costs "so we can continue investing in the wide selection, low prices and fast shipping that our customers love." He said the company would "continue investing meaningfully" in growth areas including groceries, Amazon's business-to-business sales program, services for third-party sellers and healthcare. The eliminations started last year and initially fell hardest on Amazon's Devices and Services group, which builds the Alexa digital assistant and Echo smart speakers. The latest round will mostly affect the retail division and human resources.

China has lifted its unofficial ban on Marvel titles, bestowing release dates for two major superhero tentpoles, "Black Panther: Wakanda Forever" and "Ant-Man and The Wasp: Quantumania." Variety reports: "Black Panther: Wakanda Forever," which was released everywhere else in the world last November, will open in China on Feb. 7. Shortly after, "Ant-Man and The Wasp: Quantumania" will be released on Feb. 17, the same day the sequel touches down in the U.S. and the U.K. The dates were released via Marvel's Chinese social media accounts.

Those movies will be the first Marvel adventures to play in China since 2019's "Avengers: Endgame" (which made a staggering $632 million in the territory) and "Spider-Man: Far From Home" (which brought in $198 million in the territory). In the past, Marvel movies have been extremely popular in China, with "Black Panther" grossing $105 million and "Ant-Man and the Wasp" earning $121 million in the country.

It's not clear why recent titles from Disney and other major studios have been denied release in China. But it is most likely sabre rattling directed towards the U.S. during a period of increased tensions, especially with jingoistic political events like the 100th anniversary of the Chinese Communist Party and the 20th National Congress happening in 2021 and 2022 respectively.

Sweeping the area of 12.3 standard NFL fields each rotation, with gargantuan 140-meter (459-ft) blades, the MySE 18.X-28X will be the largest wind turbine ever built. New Atlas reports: [T]he new MySE 18.X-28X promises to push "beyond the 18 MW threshold," with a mind-boggling swept area of 66,052 sq m (711,000 sq ft). MingYang says it'll handle "the most extreme ocean conditions," including level-17 typhoons with wind speeds over 56.1 m/s (202 km/h / 125.5 mph). Given an average wind speed of 8.5 m/s (30.6 km/h / 19 mph), MingYang projects it will produce 80 GWh of energy per year, "sufficient to supply 96,000 residents."

Why go to the trouble of making these things so enormous? Well, increasing the swept area of your fan increases the slice of sky you're harvesting energy from, and it bumps up your overall yield. But perhaps more importantly, wind farms need to be thought of as total systems. One of the biggest costs in an offshore installation is the work needed at the sea bed to root these huge turbines down and give the wind something to push against. So both MingYang and CSSC sell these mammoth mega-turbines primarily as cost-cutting measures that'll help bring down the capital cost of wind farm setup, and eventually the cost of the energy they produce. "Compared to the installation of 13MW models," reads a statement by MingYang on LinkedIn, "the higher output of the MySE18.X-28X would save 18 units required for a 1GW wind farm, shaving off construction costs by 120,000 - 150,000 USD/MW." New Atlas calculated this to "represent a CAPEX saving of $120-150 million on a gigawatt-scale project."

"For reference, the 1.2-GW Hornsea One Project, built using 7-MW turbines, is estimated to have cost "at least $5.153 billion, so while $150 million can't be considered chump change, it might represent a couple of percent on a project this big."

An anonymous reader quotes a report from CNBC: China's population declined in 2022, the National Bureau of Statistics said Tuesday. The drop was the first since the early 1960s, according to Yi Fuxian, a critic of China's one-child policy and author of the book "Big Country With an Empty Nest." Mainland China's population, excluding foreigners, fell by 850,000 people in 2022 to 1.41 billion, the statistics bureau said. The country reported 9.56 million births and 10.41 million deaths for 2022.

In 2021, China's population grew by the slowest increase on record. The mainland China population, excluding foreigners, rose by 480,000 to 1.41 billion people at the end of 2021, according to the National Bureau of Statistics. New births on the mainland fell by 13% in 2021 to 10.62 million babies, the data showed. In 2020, new births fell by 22%, according to the data. "The population will likely trend down from here in coming years," said Zhiwei Zhang, president and chief economist at Pinpoint Asset Management. "This is very important, with implications for potential growth and domestic demand."

The National Bureau of Statistics also reported that China's economy expanded by 3% in 2022, far below the government's target. "It also marks one of the worst performances in nearly half a century," reports CNN.

This is a developing story...

According to the Wall Street Journal, citing preliminary research from LMC Automotive and EV-Volumes.com, there were 7.8 million electric vehicles sold worldwide in 2022, a 68% increase from 2021. "The uptick helped electric vehicles achieve a roughly 10% global market share in the automotive industry for the first time," reports Insider. From the report: While 10% is only a modest share of the total market, the industry is growing faster than some had predicted. In 2021, for instance, the International Energy Agency projected that it would take until 2030 for the EV industry to reach between 7% and 12% of global auto sales. Europe and China have led the way, where electric vehicles already account for 11% and 19% of total car sales respectively, WSJ reported, citing data from LMC Automotive.

CBInsights Auto and Mobility Trends estimated that its global market share could reach 22% by 2030. BloombergNEF projected the industry's market share could reach nearly 40% by the end of the decade. The Biden Administration, which included a $7,500 tax credit for purchasing an electric vehicle in last year's Inflation Reduction Act, is aiming for half of US vehicle sales to be electric by 2030.

Extreme engineering is becoming the norm as offshore wind continues to scale up. Sweeping the area of 12.3 standard NFL fields each rotation, with gargantuan 140-meter (459-ft) blades, the MySE 18.X-28X will be the largest wind turbine ever built. From a report: Only a week ago, we wrote about CSSC's new H260-18MW, the world's largest wind turbine. Partially constructed at a special and very spacious seaside facility, this offshore wind giant took over from MingYang's MySE 16.0-242 as the biggest wind turbine on the planet. Now, MingYang has struck back in this game of one-upsmanship with the announcement of something significantly bigger. And it's not like CSSC's 18-megawatt rated effort was small; each of its three blades stretches a near-unthinkable 128 m (420 ft). But the new MySE 18.X-28X promises to push "beyond the 18 MW threshold," with a mind-boggling swept area of 66,052 sq m (711,000 sq ft).

MingYang says it'll handle "the most extreme ocean conditions," including level-17 typhoons with wind speeds over 56.1 m/s (202 km/h / 125.5 mph). Given an average wind speed of 8.5 m/s (30.6 km/h / 19 mph), MingYang projects it will produce 80 GWh of energy per year, "sufficient to supply 96,000 residents." Why go to the trouble of making these things so enormous? Well, increasing the swept area of your fan increases the slice of sky you're harvesting energy from, and it bumps up your overall yield. But perhaps more importantly, wind farms need to be thought of as total systems. One of the biggest costs in an offshore installation is the work needed at the sea bed to root these huge turbines down and give the wind something to push against.

Planet earth "has now warmed at least 1.1 degrees Celsius (2 degrees Fahrenheit) compared with preindustrial levels," reports the Washington Post, "and nearly every year in the past decade ranks near the top."

"On Thursday, the National Oceanic and Atmospheric Administration ranked 2022 as the sixth-hottest year on record and reported that the 10 warmest have all occurred since 2010...." Twenty-eight countries set national record-high annual averages last year, including Britain, Spain, France, Germany, China and New Zealand. Despite 2022 being slightly cooler than other recent years, Berkeley Earth reported that 850 million people experienced their warmest year ever. Humans' emissions of carbon dioxide and other planet-warming gases have driven this rapid warming, scientists say.

"This is a big change for the planet. And that activity has increased the amount of carbon dioxide in the atmosphere by 50 percent compared to where it was for the last few million years," Zeke Hausfather, a research scientist at Berkeley Earth, said in an interview. "There's often a debate between adapting to climate change and mitigating climate change. We don't have the luxury of choosing anymore. We're going to have to do both...."

"Even if we get our act together and reduce our emissions dramatically, and get our emissions all the way down to zero, the world isn't going to cool back down for many centuries, it's just going to stop warming," he said. "For better or worse, this is normal and it's our job to keep something worse from becoming the new normal past this."
Hausfather also told the Post that without La Niña cooling the Pacific ocean, 2022 would have been the second-warmest year on record, behind 2020.

Other stats from the article about 2022:

• Parts of Antarctica's ice sheet were as much as 70 degrees above normal.
• China suffered its worst recorded drought ever.
• Europe experienced its worst drought in 500 years.
• America had its third-driest year, and in late October 63% of America was experiencing drought conditions — a 10-year high.
• "Blistering temperatures in India and Pakistan spanning from March to May were so high that pavement buckled."

A Canadian systems security consultant discovered that an Android TV box purchased from Amazon was pre-loaded with persistent, sophisticated malware baked into its firmware. BleepingComputer reports: The malware was discovered by Daniel Milisic, who created a script and instructions to help users nullify the payload and stop its communication with the C2 (command and control) server. The device in question is the T95 Android TV box with an AllWinner T616 processor, widely available through Amazon, AliExpress, and other big e-commerce platforms. It is unclear if this single device was affected or if all devices from this model or brand include the malicious component.

Milisic believes the malware installed on the device is a strain that resembles 'CopyCat,' a sophisticated Android malware first discovered by Check Point in 2017. This malware was previously seen in an adware campaign where it infected 14 million Android devices to make its operators over $1,500,000 in profits. The analyst tested the stage-1 malware sample on VirusTotal, where it returns only 13 detections out of 61 AV engine scans, classified with the generic term of an Android trojan downloader. [...]

Unfortunately, these inexpensive Android-based TV box devices follow an obscure route from manufacturing in China to global market availability. In many cases, these devices are sold under multiple brands and device names, with no clear indication of where they originate. [...] To avoid such risks, you can pick streaming devices from reputable vendors like Google Chromecast, Apple TV, NVIDIA Shield, Amazon Fire TV, and Roku Stick.

An anonymous reader quotes a report from 9to5Mac: Apple has suffered a setback in its long-running Apple Watch patent infringement battle with medical technology company Masimo. A court has ruled that Apple has indeed infringed one of Masimo's patents in the Apple Watch Series 6 and up. Masimi is seeking a US import on all current Apple Watches. If granted, this would effectively end Apple Watch sales in the US, as the company would not be allowed to bring in the devices from China.

The battle between the two companies has a long history. Back in 2013, Apple reportedly contacted Masimo to discuss a potential collaboration between the two companies. Instead, claims Masimo, Apple used the meetings to identify staff it wanted to poach. Masimo later called the meetings a "targeted effort to obtain information and expertise." Apple did indeed hire a number of Masimo staff, including the company's chief medical officer, ahead of the launch of the Apple Watch. Masimo CEO Joe Kiano later expressed concern that Apple may have been trying to steal the company's blood oxygen sensor technology. The company describes itself as "the inventors of modern pulse oximeters," and its tech is used in many hospitals.

In 2020, the company sued Apple for stealing trade secrets and infringing 10 Masimo patents. The lawsuit asked for an injunction on the sale of the Apple Watch. Apple has consistently denied the claims, and recently hit back with a counterclaim of its own, alleging that Masimo's own W1 Advanced Health Tracking Watch infringes multiple Apple patents. Reuters reports that a US court has ruled against Apple on one of the patent claims.

The government is considering introducing a "digital pound," the economic secretary to the Treasury has told MPs. From a report: The UK was committed to becoming a world crypto hub, Andrew Griffith said. And the government was "a long way down the road... to establish a regime for the wholesale use, for payment purposes, of stablecoins." Stablecoins are designed to have a predictable value linked to traditional currencies or assets such as gold.

The currency, for use by households and businesses, would sit alongside cash and bank deposits, rather than replacing them. A public consultation on the attributes of a digital pound would be launched in coming weeks, Mr Griffith told the Treasury Select Committee. "I want to see us establish a regime, and this is within the FSMB [Financial Services and Markets Bill, currently being debated in Parliament], for the wholesale use for payment purposes of stablecoins," he said. Central banks around the world are developing or exploring digital currencies.

China, for example, is a front-runner in this global race, and is in the process of testing a digital yuan in major cities including Beijing, Shanghai and Shenzhen. The European Central Bank in July 2021 took a first step towards launching a digital version of the euro, kicking off a 24-month investigation phase to be followed by three years of implementation. And Mr Griffith told the committee: "It is right to look to seek to embrace potentially disruptive technologies, particularly when we have such a strong fintech and financial sector."

To get back some of the high-tech mojo that made it an economic powerhouse, Japan is launching an ambitious program to bring back cutting-edge semiconductor manufacturing, a field it ceded to Taiwan, South Korea, and China nearly 20 years ago. But will this new campaign at state-backed industrial policy succeed, and more importantly, is it even the right goal? From a report: The new initiatives are part of a broader strategy of greater "economic security" under Prime Minister Fumio Kishida's administration, a need driven home by the massive supply chain disruptions that occurred globally under the weight of shifting supply and demand amid COVID-19. It is also part of what is, in effect, a broad-based defense mobilization program to contain an increasingly ambitious China -- one that fits nicely in with the Biden administration's own plans.

Washington has put increasingly tight limits on U.S. companies' involvement in Chinese chip manufacturing, seeking to keep control of the advanced electronics vital to modern warfare -- and the economy as a whole -- within its wider sphere of allies like Taiwan and Japan. Other segments of the Japanese plan range from more advanced weapons systems, an ability to strike an enemy's bases back at home (despite Japan's constitution forsaking warfare), and roughly doubling military spending to 2 percent of GDP by 2027. It is a very full agenda, especially for a government that is now teetering from various scandals that always seem to befall Japanese administrations that are seen as already weak.

Apple has promised to enhance disclosures about why it expels certain apps from its App Store, following claims that the tech giant's secretive decision-making process threatens freedom of expression in countries such as China and Russia. From a report: Activist investors secured the commitment from Apple earlier this month, according to three people familiar with the agreement. Last March nearly a third of shareholders at its annual meeting backed a resolution calling for greater transparency in its relations with foreign governments. Petitioners led by Azzad Asset Management, a faith-based investor in the US, and British activist investment platform Tulipshare had called on Apple to give more detail on why certain apps were pulled from the App Store after some Bible and Quran study tools were inexplicably banned from China in late 2021.

The company has long been criticized for acquiescing to foreign governments' requests that certain apps be removed. Encrypted messaging tools WhatsApp and Signal are not allowed in China's App Store, for instance, nor are The New York Times or some social media apps. It will now give investors more detail about apps that are taken down in its Transparency Report, which currently only tells investors how many apps each country has requested be removed, whether the request is based on a legal violation, and whether Apple complied, according to the people familiar with the agreement.

sciencehabit shares a report from Science Magazine: A physics mystery has come to an end, with a resolution about as shocking as "the butler did it." For a decade, physicists have pondered why nuclear reactors pump out fewer particles called neutrinos than predicted. Some suggested the elusive bits of matter might be morphing into weirder, undetectable "sterile" neutrinos. Instead, new results pin down what other experiments had suggested: that theorists overestimated how many neutrinos a reactor should produce. [...]

In a reactor's core, uranium and plutonium nuclei split in a chain reaction, and the antineutrinos come from the radioactive "beta decay" of the lighter nuclei left behind. In such decay, a neutron in a nucleus changes into a proton while emitting an electron and an electron antineutrino. To predict the total flux of antineutrinos, physicists had to account for the amounts and decays of myriad different nuclei. That accounting pointed to a shortfall, but in 2017, physicists from the Daya Bay Reactor Neutrino Experiment in China called it into question. They studied antineutrinos from six commercial reactors, burning fuel with 4% uranium-235 atoms, which can sustain a chain reaction, and 96% uranium-238 atoms, which can't. As the uranium-235 is consumed, neutrons from its fission convert uranium-238 into plutonium-239, which also sustains a chain reaction. Daya Bay physicists found the antineutrino deficit shrank as the amount of uranium-235 fell, suggesting theorists had overestimated the flux of antineutrinos originating from uranium-235.

Now, physicists working at a small research reactor in France have confirmed that suspicion. The reactor at the Laue-Langevin Institute (ILL) produces copious neutrons for studies of materials. It also uses fuel containing 93% uranium-235. So, by studying the antineutrinos from it, researchers working with a neutrino detector called STEREO could measure the flux of antineutrinos from uranium-235 alone. The detector consists of six identical oil-filled segments lined up like teeth and spanning a distance of 9 to 11 meters from the reactor's core. Rarely, a proton in the oil will absorb an electron antineutrino to turn into a neutron while ejecting a positron -- sort of the reverse of beta decay. As the positron streaks through the oil, it produces light in proportion to the energy of the original neutrino. STEREO researchers showed the spectrum of energies of electron antineutrinos remained the same as distance from the core increased. That observation clashes with the idea that some are morphing into sterile neutrinos, because lower energy neutrinos should morph faster than higher energy ones, changing the spectrum as the neutrinos advance. STEREO researchers also showed the total flux of antineutrinos from uranium-235 was lower than the one used in theorists' models, as they report today in Nature. Taken together, the observations put an end to the reactor antineutrino deficit as evidence for a 1-eV sterile neutrino, says David Lhuillier, a neutrino physicist at France's Atomic Energy Commission and spokesperson for the 26-member STEREO team. "Can it be explained by a sterile neutrino of mass around 1 eV? The answer is no."

Other experiments -- such as one called PROSPECT at Oak Ridge National Laboratory -- had reached similar conclusions, Lhuillier notes.

Are today's rudimentary quantum computers already on the verge of significant feats beyond the reach of traditional computers? Or have their capabilities been exaggerated, as practical uses for the technology recede into the future? From a report: These questions have been thrown into sharp relief in recent days by a claim from a group of Chinese researchers to have come up with a way to break the RSA encryption that underpins much of today's online communications. The likelihood that quantum computers would be able to crack online encryption was widely believed a danger that could lie a decade or more in the future. But the 24 researchers, from a number of China's top universities and government-backed laboratories, said their research showed it could be possible using quantum technology that is already available.

The quantum bits, or qubits, used in today's machines are highly unstable and only hold their quantum states for extremely short periods, creating "noise." As a result, "errors accumulate in the computer and after around 100 operations there are so many errors the computation fails," said Steve Brierley, chief executive of quantum software company Riverlane. That has led to a search for more stable qubits as well as error-correction techniques to overcome the "noise," pushing back the date when quantum computers are likely to reach their full potential by many years.

The Chinese claim, by contrast, appeared to be an endorsement of today's "noisy" systems, while also prompting a flurry of concern in the cyber security world over a potentially imminent threat to online security. By late last week, a number of researchers at the intersection of advanced mathematics and quantum mechanics had thrown cold water on the claim. Brierley at Riverlane said it "can't possibly work" because the Chinese researchers had assumed that a quantum computer would be able to simply run a vast number of computations simultaneously, rather than trying to gain an advantage through applying the system's quantum properties.

The protective ozone layer in the upper atmosphere could be restored within several decades, scientists said Monday, as recent rogue emissions of ozone-depleting chemicals from China have been largely eliminated. From a report: In a United Nations-sponsored assessment, the scientists said that global emissions of CFC-11, a banned chemical that has been used as a refrigerant and in insulating foams, had declined since 2018 after increasing for several years. CFC-11 and similar chemicals, collectively called chlorofluorocarbons, destroy ozone, which blocks ultraviolet radiation from the sun that can cause skin cancer and otherwise harm people and other living things. The scientists said that if current policies remained in place, ozone levels between the polar regions should reach pre-1980 levels by 2040. Ozone holes, or regions of greater depletion that appear regularly near the South Pole and, less frequently, near the North Pole, should also recover, by 2045 in the Arctic and about 2066 in Antarctica.

"Things continue to trend in the right direction," said Stephen A. Montzka, a research chemist with the National Oceanic and Atmospheric Administration and one of the report's authors. Dr. Montzka led a 2018 study that alerted the world that CFC-11 emissions had been increasing since 2012 and that they appeared to come from East Asia. Investigations by The New York Times and others strongly suggested that small factories in Eastern China disregarding the global ban were the source. The new emissions had threatened to undermine the Montreal Protocol, the treaty negotiated in the 1980s to phase out the use of chlorofluorocarbons in favor of more benign chemicals after it was discovered that chlorofluorocarbons were depleting atmospheric ozone.