Amazon will allow many tech and corporate workers to continue working remotely indefinitely, as long as they are able to commute to the office when necessary, according to a blog posted Monday. From a report: The new policy is a change from Amazon's previous expectation that most employees would need to be in the office at least three days a week once offices reopen in January. Monday's message, signed by Amazon CEO Andy Jassy, explains that Amazon directors -- at Amazon, a title signifying an executive who oversees a handful of teams -- will have the discretion to allow teams under their purview to stay remote. "We expect that there will be teams that continue working mostly remotely, others that will work some combination of remotely and in the office, and still others that will decide customers are best served having the team work mostly in the office," Jassy wrote. "We're intentionally not prescribing how many days or which days -- this is for Directors to determine with their senior leaders and teams."

In the blog post, Jassy thanked Amazon employees who have been unable to work remotely during the pandemic "for their passion. It is highly appreciated." Those workers include the vast majority of Amazon's more than 1 million employees worldwide, who work in the company's fulfillment and transportation division, as well as its AWS data center and physical retail employees. Amazon's update to its return-to-work policy follows similar moves from other tech giants. Microsoft announced last month that it had postponed reopening its offices indefinitely; Google has said it anticipates roughly 20% of its workforce will continue to telecommute full-time.

sciencehabit shares a report from Science.org: In late 1791 and early 1792, on the eve of the French Revolutionary Wars, Queen Marie Antoinette engaged in a secret correspondence with her confidant and rumored lover, Swedish Count Axel von Fersen. Nearly 50 letters from that exchange survive at the French National Archives. But certain passages in 15 of the letters were unreadable, obscured by redactions made with swirls of dark ink. Now, researchers have revealed the words beneath 45 of these alterations using x-ray technology. They have also discovered the censor's identity: von Fersen, himself. The idea that von Fersen made the redactions is "a revelation," says Catriona Seth, a professor of French literature at the University of Oxford who was not involved with the work. Historians had thought the letters were censored in the second half of the 19th century -- most likely by von Fersen's great-nephew -- to protect the writers' reputations. Now, she says, scholars will need to rethink the cover-up -- and the reasons behind it.

The newly legible passages are largely sentimental, phrases like "made my heart happy," and "you that I love." Comments on politics and world events, meanwhile, remain uncensored. But even these seemingly intimate phrases don't definitively tell historians anything new about Marie Antoinette and von Fersen's relationship, Seth says. Scholars, she notes, already knew Marie Antoinette had "a very deep affection for him." Still, she adds, the letters offer "direct insight into the thoughts and feelings of Marie Antoinette." In the future, the techniques in this study could be used in combination with machine algorithms to automatically transcribe old texts, the researchers say, making it easier to understand these important documents -- and others like them. The researchers published their findings in the journal Science Advances.

Researchers have demonstrated that someone could use a stolen, unlocked iPhone to pay for thousands of dollars of goods or services, no authentication needed. Threatpost reports: An attacker who steals a locked iPhone can use a stored Visa card to make contactless payments worth up to thousands of dollars without unlocking the phone, researchers are warning. The problem is due to unpatched vulnerabilities in both the Apple Pay and Visa systems, according to an academic team from the Universities of Birmingham and Surrey, backed by the U.K.'s National Cyber Security Centre (NCSC). But Visa, for its part, said that Apple Pay payments are secure and that any real-world attacks would be difficult to carry out.

The team explained that fraudulent tap-and-go payments at card readers can be made using any iPhone that has a Visa card set up in "Express Transit" mode. Express Transit allows commuters around the world, including those riding the New York City subway, the Chicago El and the London Underground, to tap their phones on a reader to pay their fares without unlocking their devices. "An attacker only needs a stolen, powered-on iPhone," according to a writeup (PDF) published this week. "The transactions could also be relayed from an iPhone inside someone's bag, without their knowledge. The attacker needs no assistance from the merchant."

This attack is made possible by a combination of flaws in both Apple Pay and Visa's systems, the academic team noted. "The details of this vulnerability have been disclosed to Apple (Oct 2020) and to Visa (May 2021)," according to the writeup. "Both parties acknowledge the seriousness of the vulnerability, but have not come to an agreement on which party should implement a fix." "Variations of contactless-fraud schemes have been studied in laboratory settings for more than a decade and have proven to be impractical to execute at scale in the real world," Visa said in a statement to the BBC, adding that its fraud-detection systems would flag any suspicious transactions. Apple meanwhile shifted the responsibility to Visa and told the outlet, "We take any threat to users' security very seriously. This is a concern with a Visa system, but Visa does not believe this kind of fraud is likely to take place in the real world given the multiple layers of security in place. In the unlikely event that an unauthorized payment does occur, Visa has made it clear that their cardholders are protected by Visa's zero-liability policy." The researchers say users can protect themselves by not using Visa as a transport card in Apple Pay, and if they do, by remotely wiping the device if lost or stolen. The bug does not affect other types of payment cards or payment systems.

To slow the speed at which high temperatures and warm waters bleach the corals of the Great Barrier Reef, Australian scientists are spraying droplets of ocean water into the sky to form clouds to protect the environmental treasure. From a report: Researchers working on the so-called Cloud Brightening project said they use a turbine to spray microscopic sea particles to thicken existing clouds and reduce sunlight on the world's largest coral reef ecosystem located off Australia's northeast coast. The water droplets evaporate leaving only tiny salt crystals which float up into the atmosphere allowing water vapour to condense around them, forming clouds, said Daniel Harrison, a senior lecturer at Southern Cross University, who runs the project.

"If we do it over an extended period of time for a few weeks to a couple of months when the corals are experiencing a marine heatwave we can actually start to lower the water temperature over the Reef," said Harrison. The project had its second trial in March, the end of the Southern Hemisphere summer when the Reef off Australia's northeast is at its hottest, gathering valuable data on the atmosphere when corals are at most risk of bleaching. A combination of light and warm water causes coral bleaching. By cutting light over the reef by 6% in summer, "bleaching stress" would be cut by 50% to 60% on the undersea ecosystem, Harrison said.

Scientists have successfully used artificial intelligence to create a new drug regime for children with a deadly form of brain cancer that has not seen survival rates improve for more than half a century. The Guardian reports: The breakthrough, revealed in the journal Cancer Discovery, is set to usher in an "exciting" new era where AI can be harnessed to invent and develop new treatments for all types of cancer, experts say. Computer scientists and cancer specialists at the ICR and the Royal Marsden NHS Foundation Trust used AI to work out that combining the drug everolimus with another called vandetanib could treat diffuse intrinsic pontine glioma (DIPG), a rare and fast-growing type of brain tumor in children. Currently, DIPG and other similar types of tumors are incredibly difficult to remove surgically from children because they are diffuse, which means they do not have well-defined borders suitable for operations. But after crunching data on existing drugs, the team found everolimus could enhance vandetanib's capacity to "sneak" through the blood-brain barrier and treat the cancer.

The combination has proved effective in mice and has now been tested in children. Experts now hope to test it on a much larger group of children in major clinical trials. The research found that combining the two drugs extended survival in mice by 14% compared with those receiving a standard control treatment. Both the drugs in the research, which was funded by Brain Research UK, the DIPG Collaborative, Children with Cancer UK and the Royal Marsden Cancer Charity, among others, are already approved to treat other types of cancer. "The AI system suggested using a combination of two existing drugs to treat some children with DIPG -- one to target the ACVR1 mutation, and the other to sneak the first past the blood brain barrier," said Chris Jones, professor of paediatric brain tumor biology at the ICR. "The treatment extended survival when we tested it in a mouse model, and we have already started testing it out in a small number of children. We still need a full-scale clinical trial to assess whether the treatment can benefit children, but we've moved to this stage much more quickly than would ever have been possible without the help of AI."

PayPal has been talking about its "super app" plans for some time, having recently told investors its upcoming digital wallet and payments app had been given a go for launch. Today, the first version of that app is officially being introduced, offering a combination of financial tools including direct deposit, bill pay, a digital wallet, peer-to-peer payments, shopping tools, crypto capabilities and more. From a report: The company is also announcing its partnership with Synchrony Bank for its new high-yield savings account, PayPal Savings. These changes shift PayPal from being largely a payments utility that's tacked on other offerings here and there, to being a more fully fleshed out finance app. Though PayPal itself doesn't aim to be a "bank," the new app offers a range of competitive features for those considering shifting their finances to neobanks, like Chime or Varo, as it will now also include support for paycheck Direct Deposits through PayPal's bank partners with two-day early access, bill pay and more.

"A CRISPR-Cas9 gene editing technology that has shown promise in clearing HIV from mice is headed into human testing," reports Fierce Biotech: We don't like to throw the word "cure" around here. But Excision BioTherapeutics thinks the therapy could replace standard-of-care retroviral therapy, which keeps HIV from replicating but does not remove it from the body. That means patients stay on the treatment, which can cause serious side effects and affect quality of life. Now with the start of human testing, the real path to see if this new and lauded tech can accomplish this really begins.

HIV integrates its genetic material into the genome of a host cell, meaning available therapies just can't remove it. A team of scientists at Temple University and the University of Nebraska Medical Center managed to remove the virus completely from mice during preclinical testing using a combination of CRISPR and antiretroviral therapy. They also found no adverse events that could be linked to the therapy in the study, published back in 2019... EBT-101 has since been tested in nonhuman primates, which showed it reached every tissue in the body where HIV reservoirs reside.

Excision licensed the therapy from the universities with a goal of moving it into clinical trials. Now, the FDA is on board. The biotech plans to initiate a phase 1/2 clinical trial later this year, according to the statement.

The technology used by Excision was licensed from the lab of famed CRISPR pioneer Jennifer Doudna. The company is also working on similar treatments for other viruses, including herpes and hepatitis B.

Aalto University reports via Phys.Org: When two substances are brought together, they will eventually settle into a steady state called thermodynamic equilibrium; examples include oil floating on top of water and milk mixing uniformly into coffee. Researchers at Aalto University in Finland wanted to disrupt this sort of state to see what happens -- and whether they can control the outcome. In their work, the team used combinations of oils with different dielectric constants and conductivities. They then subjected the liquids to an electric field. "When we turn on an electric field over the mixture, electrical charge accumulates at the interface between the oils. This charge density shears the interface out of thermodynamic equilibrium and into interesting formations," explains Dr. Nikos Kyriakopoulos, one of the authors of the paper. As well as being disrupted by the electric field, the liquids were confined into a thin, nearly two-dimensional sheet. This combination led to the oils reshaping into various completely unexpected droplets and patterns.

The droplets in the experiment could be made into squares and hexagons with straight sides, which is almost impossible in nature, where small bubbles and droplets tend to form spheres. The two liquids could be also made to form into interconnected lattices: grid patterns that occur regularly in solid materials but are unheard of in liquid mixtures. The liquids can even be coaxed into forming a torus, a donut shape, which was stable and held its shape while the field was applied -- unlike in nature, as liquids have a strong tendency to collapse in and fill the hole at the center. The liquids can also form filaments that roll and rotate around an axis. One of the exciting results of this work is the ability to create temporary structures with a controlled and well-defined size which can be turned on and off with voltage, an area that the researchers are interested in exploring further for creating voltage-controlled optical devices. Another potential outcome is the ability to create interacting populations of rolling microfilaments and microdroplets that, at some elementary level, mimic the dynamics and collective behavior of microorganisms like bacteria and microalgae that propel themselves using completely different mechanisms. The research has been published in the journal Science Advances.

Eric Niiler writes via Wired: The landscape of Titan, Saturn's largest moon, is both familiar and strange. Like Earth, Titan has rivers, lakes, clouds, and falling raindrops, as well as mountains of ice and a thick atmosphere. But instead of water, Titan's chemical cycle is composed of liquid methane, an organic molecule made from one carbon and four hydrogen atoms. Researchers believe this swirling mixture of methane, combined with the moon's nitrogen-laden atmosphere, surface water ice, and maybe some energy from either a volcano or a meteor impact, might have been the perfect recipe to create some kind of simple life form. [...] Now, A researcher has recreated Titan's environment in a small glass cylinder and mixed organic chemicals under the same temperature and pressure conditions found on that moon. Organic molecules that are liquid on Earth -- such as methane and benzene -- become solid icy mineral crystals on Titan because it's so cold, sometimes down to -290 Fahrenheit, according to Tomce Runcevski, an assistant professor of chemistry at Southern Methodist University, and the principal investigator on a study presented this week at the American Chemical Society meeting.

In a series of experiments, Runcevski took tiny glass tubes, sucked the air out of them with a pump, and added water ice. Then, one at a time, he added nitrogen, methane, its chemical relative ethane, and other organic compounds. Each time, he varied the composition of the chemical mixture inside the glass cylinders to see what would happen. He next applied pressure -- equivalent to about 1.45 times Earth's atmosphere -- and reduced the temperature by surrounding the vials with extremely cold air. [...] Under that moon's atmospheric pressure and temperature, he found that two organic molecules abundant on Titan and toxic to humans here on Earth -- acetonitrile and propionitrile -- become a single crystalline form. On Titan, these two molecules are formed by the combination of nitrogen and methane, plus energy from the sun, Saturn's magnetic field, and cosmic rays. Acetonitrile and propionitrile start as a gas in the atmosphere, then condense into aerosols, and then rain down onto the moon's surface and become chunks of solid minerals in several forms.

It's the first time that these two chemicals have been combined into a crystal shape on Earth under the conditions present on Titan. Another important finding is that the outer facet of the crystal also has a slight electric charge, or polarity, on its surface. That surface charge can attract other molecules such as water -- which would be necessary to form the building blocks of carbon-based life. This new experiment doesn't prove that there's life on Titan, but it means that researchers can discover new things about its weird, frigid surface environment even before the NASA Dragonfly spacecraft lands there.

Payments technology company Visa announced Monday that it has bought a CryptoPunk as it enters into the world of non-fungible token (NFT) commerce. The Block reports: Visa bought CryptoPunk 7610, one of 3,840 female punks, for around $150,000 last week. CryptoPunks are considered the original NFTs, launched in 2017 by Larva Labs. These are a collection of 10,000 pixel art images of misfits and eccentrics. Each CryptoPunk has its own personality and unique combination of features. "We felt that CryptoPunks would be a great addition to our collection of artifacts that can chart and celebrate the past, present, and future of commerce," Visa's head of crypto, Cuy Sheffield, told The Block in an interview.

When asked why Visa added a CryptoPunk to the collection, Sheffield said CryptoPunks "pioneered the NFT technology and wave of NFT commerce," so Visa wanted to own a punk. He said the decision was less about the individual punk but more about CryptoPunks in general, given that it is a historical NFT project. Visa worked with Anchorage Digital to buy the CryptoPunk, meaning Anchorage facilitated the transaction and is custodying the NFT for Visa, said Sheffield. "We purchased it from Anchorage using fiat," he said. Visa first partnered with Anchorage earlier this year to settle payments in the USDC stablecoin on Ethereum.

Visa believes NFTs will play an important role in the future of commerce. NFTs can help individual content creators and small and medium-sized businesses in new ways, said Sheffield. "NFTs are an intersection of culture and commerce," he added. Sheffield compared NFTs with the early days of e-commerce, saying that e-commerce made it possible for a small business to sell online and reach customers worldwide. But they still have to produce and ship physical goods, which can have high upfront costs. So NFTs allow a small business to harness a public blockchain to create digital goods, which can be delivered instantly to a crypto wallet anywhere in the world, said Sheffield. "We can envision a future where a crypto address becomes as important as your mailing address," he said.

The Nokia 9000 Communicator -- "the office in your back pocket" -- was a smartphone even before the word was invented. It has been 25 years since it revolutionized the market. DW: Nokia presented its 9000 Communicator at the CeBIT 1996 computer fair in Hanover, Germany, and launched on August 15 of that year. "The office in your back pocket" added to the IBM Simon from 1994 and the HP OmniGo 700LX from March 1996. The 9000 Communicator was a smartphone even before the word had been invented. For a decade, the device was ââwhat a smartphone was supposed to look like. After the Communicator, Blackberry perfected the idea -- until Apple's iPhone with its multitouch screen in 2007 came along.

Opened like a minilaptop, with a keyboard and a black-and-white display with a diagonal of just 11.5 centimeters (4.5 inches), the retrofuturistic-looking device was made famous by actor Val Kilmer in the remake of the film The Saint. The 9000 Communicator was the first device to offer a combination of keyboard, quality screen, and business and internet software in one package. It had for the first time all of the features of a computer on a phone, putting email, web browsing, fax, word processing and spreadsheets into a single pocketable device.

"The combination of a massive labor shortage in the U.S. coming out of the pandemic and an increasingly crowded market of app-based share-everything companies is raising the prices for freelance and contract work," writes CNBC's Ari Levy. "Companies have to find new ways to bolster the supply-end of their platforms to meet consumer demand and continue growing at a rapid clip." From the report: Far from taking the number to zero, Airbnb said in its second-quarter earnings report on Thursday that sales and marketing expenses surged 175% from a year earlier to $315.3 million. Costs aren't quite back to pre-pandemic levels, but they're not too far off the peak of $437 million in the fourth quarter of 2019. The difference now is that Airbnb is spending to attract hosts, rather than travelers. It's becoming a common theme in the gig economy. Food-delivery service DoorDash said in its earnings announcement, also on Thursday, that it boosted sales and marketing costs by over 150% from a year earlier to lure Dashers, or what the company calls its drivers.

Uber and Lyft have been struggling with long wait times and consumer complaints about higher prices. Uber CEO Dara Khosrowshahi said on his company's earnings call last week that Uber has been spending more to get drivers on the road. "The heaviest driver acquisition spend and incentive spend that we think we will see and we saw was in Q2," Khosrowshahi said. "We really had to take action very quickly because the marketplace was not at a place that we considered healthy, and we wanted to lean in to get wait times down, to get surge levels down."

Antivirus vendor NortonLifeLock this afternoon said it will merge with Britain's Avast PLC in a transaction combining cash and stock in two different options, totaling between $8.1 billion and $8.6 billion in stock. ZDNet reports: That value is roughly equivalent to the value in U.S. dollars of Avast's enterprise value, which takes into account its cash and debt, of 6.5 billion pounds, based on the closing price of Avast stock Tuesday of 5.68 pounds on the London Stock Exchange. The two companies said in the joint press release that their respective boards of directors see an opportunity to "create a new, industry-leading consumer Cyber Safety business, leveraging the established brands, technology and innovation of both groups to deliver substantial benefits to consumers, shareholders, and other stakeholders."

The two companies said the deal will bring together product lines that are broadly complementary, while giving the combined company a user base of over half a billion customers. The deal will broaden the geographic market coverage of the combined company. In addition, the two expect to realize "$280 million of annual gross cost synergies." Under terms of the deal, "Avast shareholders will be entitled to receive a combination of cash consideration and newly issued shares in NortonLifeLock with alternative consideration elections available."

Hmmmmmm shares a report from The Independent: Scientists in China have developed the hardest and strongest glassy material known so far that can scratch diamond crystals with ease. The researchers, including those from Yanshan University in China, noted that the new material -- tentatively named AM-III -- has "outstanding" mechanical and electronic properties, and could find applications in solar cells due to its "ultra-high" strength and wear resistance. Analysis of the material, published in the journal National Science Review, revealed that its hardness reached 113 gigapascals (GPa) while natural diamond stone usually scores 50 to 70 on the same test.

According to the scientists, AM-III has tunable energy absorption properties comparable to semiconductors commonly used in solar cells such as hydrogenated amorphous silicon films. While in diamond crystals, the organized internal structure of its atoms and molecules contribute to their immense strength and hardness, in AM-III the researchers found that a combination of order and disorder of its molecules give rise to its strange properties. Using fullerenes, which are materials made of hollow football-like arrangements of carbon atoms, the researchers produced different types of glassy materials with varying molecular organization among which AM-III had the highest order of atoms and molecules. Increasing the order further, the scientists observed, could potentially kill the semiconductivity and other properties that required the atoms and molecules to be chaotic.

Workers at an Amazon warehouse in Alabama might hold a second election to decide whether to join a union. But today the New York Times reports Amazon is also facing "a widening campaign to rein in the power it wields over its employees and their workplace conditions." Those efforts include a campaign by the Teamsters that would generally circumvent traditional workplace elections and pressure the company through protests, boycotts and even fights against its expansion efforts at the local level. Legislation in California would force Amazon to reveal its productivity quotas, which unions contend are onerous and put workers at risk... The Teamsters argue that holding union votes at individual work sites is typically futile at a company like Amazon, because labor law allows employers to wage aggressive anti-union campaigns, and because high turnover means union supporters often leave the company before they have a chance to vote.

Instead, the Teamsters favor a combination of tactics like strikes, protests and boycotts that pressure the company to come to the bargaining table and negotiate a contract covering wages, benefits and working conditions. While the union hasn't laid out its tactics in detail, it recently organized walkouts involving drivers and dockworkers at a port in Southern California to protest the drivers' treatment there.

They hope to enlist the help of workers at other companies, sympathetic consumers and even local businesses threatened by a giant like Amazon, partly to mitigate the challenges presented by high employee turnover... The union believes that it can pull a variety of political levers to help put the company on the defensive. Mr. Korgan cited a recent vote by the City Council in Fort Wayne, Ind., denying Amazon a tax abatement after a local Teamsters official spoke out against it, and a vote by the City Council in Arvada, Colo., to reject a more than 100,000-square-foot Amazon delivery station. While the Arvada vote centered on traffic concerns, Teamsters played a role in drumming up opposition...

Other labor groups are pressing ahead with less orthodox efforts to increase the power of Amazon workers. Over the first six months of this year, a group called the Solidarity Fund, which raises money from individual tech workers, distributed over $100,000 in grants to workers seeking to organize their colleagues to push for workplace improvements. About half the money, in $2,500 increments, went to workers at Amazon. It funded a laptop to assist with organizing, as well as hiring a freelance graphic designer to help make pamphlets, among the varied efforts.

The Drive reports that US Northern Command recently completed a string of tests for Global Information Dominance Experiments (GIDE), a combination of AI, cloud computing and sensors that could give the Pentagon the ability to predict events "days in advance," according to Command leader General Glen VanHerck. Engadget reports: The machine learning-based system observes changes in raw, real-time data that hint at possible trouble. If satellite imagery shows signs that a rival nation's submarine is preparing to leave port, for instance, the AI could flag that mobilization knowing the vessel will likely leave soon. Military analysts can take hours or even days to comb through this information -- GIDE technology could send an alert within "seconds," VanHerck said.

The most recent dry run, GIDE 3, was the most expansive yet. It saw all 11 US commands and the broader Defense Department use a mix of military and civilian sensors to address scenarios where "contested logistics" (such as communications in the Panama Canal) might pose a problem. The technology involved wasn't strictly new, the General said, but the military "stitched everything together." The platform could be put into real-world use relatively soon. VanHerck believed the military was "ready to field" the software, and could validate it at the next Globally Integrated Exercise in spring 2022.

In a blockbuster deal that rocks the fintech world, Square announced today that it is acquiring Australian buy now, pay later giant Afterpay in a $29 billion all-stock deal. From a report: The purchase price is based on the closing price of Square common stock on July 30, which was $247.26. The transaction is expected to close in the first quarter of 2022, contingent upon certain closing conditions. It values Afterpay at more than 30% premium to its latest closing price of A$96.66. Square co-founder and CEO Jack Dorsey said in a statement that the two fintech behemoths "have a shared purpose."

"We built our business to make the financial system more fair, accessible, and inclusive, and Afterpay has built a trusted brand aligned with those principles," he said in the statement. "Together, we can better connect our Cash App and Seller ecosystems to deliver even more compelling products and services for merchants and consumers, putting the power back in their hands." The combination of the two companies would create a payments giant unlike any other. Over the past 18 months, the buy now, pay later space has essentially exploded, appealing especially to younger generations drawn to the idea of not using credit cards or paying interest and instead opting for the installment loans, which have become ubiquitous online and in retail stores.

Yasmeen Abutaleb, Carolyn Y. Johnson, and Joel Achenbach, reporting at Washington Post: The delta variant of the coronavirus appears to cause more severe illness than earlier variants and spreads as easily as chickenpox, according to an internal federal health document that argues officials must "acknowledge the war has changed." The document is an internal Centers for Disease Control and Prevention slide presentation, shared within the CDC and obtained by The Washington Post. It captures the struggle of the nation's top public health agency to persuade the public to embrace vaccination and prevention measures, including mask-wearing, as cases surge across the United States and new research suggests vaccinated people can spread the virus.

The document strikes an urgent note, revealing the agency knows it must revamp its public messaging to emphasize vaccination as the best defense against a variant so contagious that it acts almost like a different novel virus, leaping from target to target more swiftly than Ebola or the common cold. It cites a combination of recently obtained, still-unpublished data from outbreak investigations and outside studies showing that vaccinated individuals infected with delta may be able to transmit the virus as easily as those who are unvaccinated. Vaccinated people infected with delta have measurable viral loads similar to those who are unvaccinated and infected with the variant.

"I finished reading it significantly more concerned than when I began," Robert Wachter, chairman of the Department of Medicine at the University of California at San Francisco, wrote in an email. CDC scientists were so alarmed by the new research that the agency earlier this week significantly changed guidance for vaccinated people even before making new data public. The data and studies cited in the document played a key role in revamped recommendations that call for everyone -- vaccinated or not -- to wear masks indoors in public settings in certain circumstances, a federal health official said.

An anonymous reader quotes a report from ScienceAlert: [A] team of surgeons has successfully completed the first human implantation in the US of an artificial heart device called the 'Aeson', developed by French company CARMAT. The artificial heart has two ventricular chambers and four biological valves, just like the real organ, and is powered by an external device. Made from "biocompatible materials" including bovine tissue, the artificial heart uses a combination of sensors and algorithms to maintain its pace and keep blood circulating through the body. "We are encouraged that our patient is doing so well after the procedure," says cardiologist Carmelo Milano from the Duke University School of Medicine. "As we evaluate this device, we are both excited and hopeful that patients who otherwise have few to no options could have a lifeline."

The patient in question is 39-year-old Matthew Moore, from Shallotte in North Carolina. Moore was initially due to have heart bypass surgery, but as his condition deteriorated the medical staff started to run out of options; he became so ill that even a regular heart transplant was too risky. Fortunately, he was in the right place: the Aeson device is being tested at Duke University, pending approval from the US Food and Drug Administration (FDA). It's already been given the green light for use by regulators in Europe, after several years of tests in European patients, not all of which have been successful. The artificial heart has been developed specifically to help those whose hearts can no longer pump enough blood through both chambers. It replaces the entire natural heart, although it's not intended to be permanent -- it's designed to be a bridge towards a full heart transplant within six months or so.

An anonymous reader quotes a report from Ohio State News: Scientists who study glacier ice have found viruses nearly 15,000 years old in two ice samples taken from the Tibetan Plateau in China. Most of those viruses, which survived because they had remained frozen, are unlike any viruses that have been cataloged to date. The findings, published today in the journal Microbiome, could help scientists understand how viruses have evolved over centuries. For this study, the scientists also created a new, ultra-clean method of analyzing microbes and viruses in ice without contaminating it.

The researchers analyzed ice cores taken in 2015 from the Guliya ice cap in western China. The cores are collected at high altitudes -- the summit of Guliya, where this ice originated, is 22,000 feet above sea level. The ice cores contain layers of ice that accumulate year after year, trapping whatever was in the atmosphere around them at the time each layer froze. Those layers create a timeline of sorts, which scientists have used to understand more about climate change, microbes, viruses and gases throughout history. Researchers determined that the ice was nearly 15,000 years old using a combination of traditional and new, novel techniques to date this ice core. When they analyzed the ice, they found genetic codes for 33 viruses. Four of those viruses have already been identified by the scientific community. But at least 28 of them are novel. About half of them seemed to have survived at the time they were frozen not in spite of the ice, but because of it.