World military spending continued to grow in 2021, reaching an all-time high of $2.1 trillion. This was the seventh consecutive year that spending increased. From a report: "Even amid the economic fallout of the Covid-19 pandemic, world military spending hit record levels," said Dr Diego Lopes da Silva, Senior Researcher with SIPRI's Military Expenditure and Arms Production Programme. "There was a slowdown in the rate of real-terms growth due to inflation. In nominal terms, however, military spending grew by 6.1 per cent." As a result of a sharp economic recovery in 2021, the global military burden -- world military expenditure as a share of world gross domestic product (GDP) -- fell by 0.1 percentage points, from 2.3 per cent in 2020 to 2.2 per cent in 2021. US military spending amounted to $801 billion in 2021, a drop of 1.4 per cent from 2020. The US military burden decreased slightly from 3.7 per cent of GDP in 2020 to 3.5 per cent in 2021. US funding for military research and development rose by 24 per cent between 2012 and 2021, while arms procurement funding fell by 6.4 per cent over the same period. In 2021 spending on both decreased. However, the drop in R&D spending (-1.2 per cent) was smaller than that in arms procurement spending (-5.4 per cent).

An anonymous reader quotes a report from Scientific American: Some species play an outsize role in the environment they inhabit. Beavers build dams that create ponds where fish thrive. Otters in kelp forests eat enough sea urchins so that the kelp can grow without being gobbled up first. These so-called keystone species hold their ecosystem together. But what if ecosystems not only hinge on a single species but can be made or broken by a single gene? In a study published on Thursday in Science, researchers have demonstrated the existence of what they call a "keystone gene." The discovery may have implications for how scientists think about the ways ecosystems, and the species in them, persist over time.

In the lab, the researchers built several miniature ecosystems that consisted of just four species each. At the bottom of the food chain was Arabidopsis thaliana, a small annual plant that is a favorite study organism among biologists (its genome was sequenced more than 20 years ago). In each ecosystem, the plant served as food for two species of aphids, which in turn fed a parasitoid wasp. Each bread-box-sized ecosystem contained multiple Arabidopsis plants. In some systems, the plants were genetically identical -- a monoculture. In others, genetic variations were introduced by turning on and off three genes -- MAM1, AOP2 and GSOH -- in various combinations.The researchers focused on these genes because they maintain the production of compounds called aliphatic glucosinolates, which protect the plant by deterring hungry aphids. Some of the experimental ecosystems had more variation in the number of genetic combinations than others; the researchers watched to see how well plants, aphids and wasps would coexist in each scenario.

As the team expected, the ecosystems with more genetically diverse plants turned out to be more stable. For each plant with a different genetic makeup that the researchers added to the mix, the insects' extinction rate fell by nearly 20 percent, compared with monocultures. But what stunned the researchers was that this result seemed to hinge on a single gene. Regardless of diversity, if systems contained plants with a certain variant, or allele, of the AOP2 gene, the extinction rate of the insects decreased by 29 percent, compared with systems without it. Essentially, if you change that AOP2 allele, you lose the insects. Increasing genetic diversity helped the insects because it increased the likelihood of the aphids encountering plants with this one critical gene variant. [...] Also surprising was the mechanism by which the AOP2 allele impacted the aphids. Although the variant changed the way a plant produced its aphid-deterring compound, it also allowed the plant to grow faster. This in turn allowed the aphids, as well as the wasps that relied on them for food, to become larger faster.

In the past five years, reports of staggering insect declines have stoked anxiety and debate concerning the fate of the "little things that run the world," as the late biologist E. O. Wilson once called them. As for the how and why of these declines, the prime culprits are habitat destruction, rampant use of pesticides, and climate change. But new research published March 30 in Biology Letters adds an unexpected suspect, at least for a large swath of North America: the earthworm. From a report: The study looked at 60 plots in an aspen and poplar forest in Alberta, Canada, and found that as the numbers of earthworms wriggling in the soil and leaf litter increased, the diversity and abundance of invertebrates aboveground decreased. These results might sound surprising, since earthworms are widely considered to be helpful garden residents. Worms earned their reputation by aerating and mixing soil with their burrows and releasing locked up nutrients in their castings, all of which can help certain plants thrive.

But this new study is part of a growing body of research suggesting that at least in the forests of northern North America, earthworms may not be the slimy angels of the underworld we tend to think they are. "When people talk about insect decline, they rarely talk about the soil," says Nico Eisenhauer, a soil ecologist at Leipzig University in Germany and one of the authors of the new study. "Many of the insects and invertebrates that are in decline have life phases in the soil. What you don't see flying around now has first disappeared from the soil, and earthworms can fundamentally alter soil conditions."

Earthworms' subterranean engineering isn't a problem in their native ecosystems, but in the northern half of North America, the glaciers of the last ice age wiped out virtually all soil-dwelling worms more than 10,000 years ago. The ice sheets covered nearly all of Canada, most of the northeast U.S., and much of the upper Midwest. When the ice receded, forests returned but the worms did not because they can only expand their range by a maximum of about 30 feet a year. These northerly ecosystems evolved for millennia in the absence of earthworms. Without worms munching through fallen foliage and churning the soil, these forests accumulated thick layers of leaf litter, which came to support a vast array of animals, fungi, and plants. Eisenhauer says even non-scientists can appreciate the difference.

Andrew Cunningham writes via Ars Technica: Microsoft's DirectStorage API promises to speed up game-load times, both on the Xbox Series X/S and on Windows PCs (where Microsoft recently exited its developer-preview phase). One of the first games to demonstrate the benefits of DirectStorage on the PC is Square Enix's Forspoken, which was shown off by Luminous Productions technical director Teppei Ono at GDC this week. As reported by The Verge, Ono said that, with a fast NVMe SSD and DirectStorage support, some scenes in Forspoken could load in as little as one second. That is certainly a monstrous jump from the days of waiting for a PlayStation 2 to load giant open-world maps from a DVD.

As a demonstration of DirectStorage, though, Forspoken's numbers are a mixed bag. On one hand, the examples Ono showcased clearly demonstrate DirectStorage loading scenes more quickly on the same hardware, compared to the legacy Win32 API -- from 2.6 seconds to 2.2 seconds in one scene, and from 2.4 seconds to 1.9 seconds in another. Forspoken demonstrated performance improvements on older SATA-based SSDs as well, despite being marketed as a feature that will primarily benefit NVMe drives -- dropping from 5.0 to 4.6 seconds in one scene, and from 4.1 to 3.4 seconds in another. Speed improvements for SATA SSDs have been limited for the better part of a decade now because the SATA interface itself (rather than the SSD controller or NAND flash chips) has been holding them back. So eking out any kind of measurable improvement for those drives is noteworthy.

On the other hand, Ono's demo showed that game load time wasn't improving as dramatically as the raw I/O speeds would suggest. On an NVMe SSD, I/O speeds increased from 2,862MB/s using Win32 to 4,829MB/s using DirectStorage -- nearly a 70 percent increase. But the load time for the scene decreased from 2.1 to 1.9 seconds. That's a decrease that wouldn't be noticeable even if you were trying to notice it. The Forspoken demo ultimately showed that the speed of the storage you're using still has a lot more to do with how quickly your games load than DirectStorage does. One scene that took 24.6 seconds to load using DirectStorage on an HDD took just 4.6 seconds to load on a SATA SSD and 2.2 seconds to load on an NVMe SSD. That's a much larger gap than the one between Win32 and DirectStorage running on the same hardware.

Sea ice around Antarctica has reached a record low in four decades of observations, a new analysis of satellite images shows. From a report: As of Tuesday, ice covered 750,000 square miles around the Antarctic coast, below the previous record low of 815,000 square miles in early March 2017, according to the analysis by the National Snow and Ice Data Center in Boulder, Colo. "It's really unprecedented," said Marilyn N. Raphael, a professor of geography at the University of California, Los Angeles, who studies Antarctic sea ice. Warmer ocean temperatures may have played a role, she said, "but there are other factors that we will be working on finding out in the next months." Antarctic sea ice extent is highly variable from year to year, but overall has increased very slightly, on average, since the late 1970s, when satellite observations began. By contrast, sea ice extent in the Arctic, which is warming about three times as fast as other regions, has decreased by more than 10 percent a decade over the same period.

The two regions are very different. The Arctic Ocean covers high latitudes, including the North Pole itself, and is hemmed in by land masses. In the Southern Hemisphere, Antarctica covers the pole. The Southern Ocean, which surrounds the continent, begins at much lower latitudes and is open to the north. While rapid warming in the Arctic is largely responsible for the shrinking of sea ice there, the effect of climate change on Antarctic sea ice is far less clear. Edward Blanchard-Wrigglesworth, a climate scientist at the University of Washington, said that many scientists expect that global warming will eventually lead to declines in Antarctic sea ice. But right now, he said, "it's really hard to connect the two, especially in terms of single events like this one." Instead, a complex group of factors is at play when it come to Antarctic sea ice. Large-scale atmospheric patterns, often occurring far from the continent, as well as local ocean currents and winds can all increase or reduce sea-ice coverage.

"Around this time last year, millions of Texans were shivering without power during one of the coldest spells to hit the central United States," remembers the Washington Post. "For five days, blackouts prevented people from heating their homes, cooking or even sleeping. More than 200 people died in what is considered the nation's costliest winter storm on record, amounting to $24 billion in damages.

"Twelve months later, the state's electrical grid, while improved, is still vulnerable to weather-induced power outages." "If we got another storm this year, like Uri in 2021, the grid would go down again," said Andrew Dessler, a professor of atmospheric sciences at Texas A&M University. "This is still a huge risk for us."

Now, a recent study shows that electricity blackouts can be avoided across the nation — perhaps even during intense weather events — by switching to 100 percent clean and renewable energy, such as solar, wind and water energy. "Technically and economically, we have 95 percent of the technologies we need to transition everything today," said Mark Jacobson, lead author of the paper and professor of civil and environmental engineering at Stanford University. Wind, water and solar already account for about one fifth of the nation's electricity, although a full transition in many areas is slow.

The study showed a switch to renewables would also lower energy requirements, reduce consumer costs, create millions of new jobs and improve people's health....

The team found the actual energy demand decreased significantly by simply shifting to renewable resources, which are more efficient. For the entire United States, total end-use energy demand decreased by around 57 percent. Per capita household annual energy costs were around 63 percent less than a "business as usual" scenario.... In Texas, a complete green transition would reduce the annual average end-use power demand by 56 percent. It also reduces peak loads, or the highest amount of energy one draws from the grid at a time. Jacobson said many homes would also have their own storage and wouldn't need to rely on the grid as much.

The team also found interconnecting electrical grids from different geographic regions can make the power system more reliable and reduce costs. Larger regions are more likely to have the wind blowing, the sun shining or hydroelectric power running somewhere else, which may be able to help fill any supply gaps. "The intermittency of renewable energy declines as you look at larger and larger areas," said Dessler. "If it's not windy in Texas, it could be windy in Iowa. In that case, they could be overproducing power and they could be shipping some of their extra power to us." The study stated costs per unit energy in Texas are 27 percent lower when interconnected with the Midwest grid than when isolated, as it currently is.
Interestingly, long-duration batteries aren't important for grid stability. the team found, since our current 4-hour batteries can just be connected for longer-term storage. Professor Dessler tells the Post we should think of "renewables" as a system which includes storage technology and easily-dispatchable energy solutions.

And the Post adds that a grid powered by renewables "would also produce cleaner air, which could reduce pollution-related deaths by 53,000 people per year and reduce pollution-related illnesses for millions of people in 2050."

An anonymous reader quotes a report from The Economist: Pop-up notifications are often annoying. For Meta, one in Apple's iOS operating system, which powers iPhones, is a particular headache. On February 2nd Meta, which owns Facebook and Instagram, told investors that privacy-focused changes to iOS, including the "ask app not to track" notification, would cost the company around $10 billion in 2022. That revelation, along with growing competition and sluggish growth in user numbers, helped to prompt a 23% plunge in Meta's share price and showed Apple's might. But what did Apple actually do, and why was it so costly?

The promise of digital advertising has always been its ability to precisely target people. Before the digital age, companies placed ads in places where they expected potential customers would see them, such as a newspaper, and hoped for the best. Online, companies could instead target ads based on people's browsing history and interests. This fueled the profits of companies like Meta, which held vast amounts of data on their users. For years, Apple helped by offering an "identifier for advertisers" (IDFA), giving advertisers a way to track people's behavior on its devices. Users have long been able to disable IDFA in their phones' settings. But last year, citing privacy concerns, Apple turned off IDFA by default and forced apps to ask people if they want to be tracked. It seems most do not: a study in December by AppsFlyer, an ad-tech company, suggested that 54% of Apple users who saw the prompt opted out.

This change has made digital advertising much trickier. Sheryl Sandberg, Meta's chief operating officer, told investors that the change decreased the accuracy of ad targeting and slowed the collection of data showing whether ads work. Both of these changes make "direct-response ads," which encourage consumers to take an action like clicking or purchasing, less appealing to advertisers. The financial impact on ad-sellers like Meta has been painful. The $10 billion hit estimated by Meta amounts to over 8% of its revenue in 2021. Snap, another social-media company, and Unity, a games engine which operates an ad network, also expect Apple's changes to hurt their businesses. Apple, meanwhile, is doing well: estimates suggest its own ad business has grown significantly since it introduced the app tracking pop-up. (A different pop-up, with a more persuasive sales pitch for opting-in to tracking, appears on Apple's own apps.)

Friday the results of several large studies showed that getting a third Covid vaccine "booster shot" dramatically decreased infections from the Omicron variant.

And now the Times of Israel reports that the country's Health Ministry "said on Sunday that the fourth vaccine dose for those aged 60 and up offers a threefold protection against serious illness and twofold protection against infection in the current wave driven by the Omicron variant." The ministry said the figures are the result of initial analysis by experts from various leading academic and health institutions, and compares the fourth vaccine with those who received three doses at least four months ago.

The figures are based on 400,000 Israelis who received the fourth vaccine and 600,000 who received three doses, with the ministry stressing that the methodology is similar to previous papers the experts have published in the peer-reviewed New England Journal of Medicine.

An anonymous reader quotes a report from New Atlas: For the first time, a team of scientists has now demonstrated the quantum mechanical principle of superabsorption that underpins quantum batteries in a proof-of-concept device. "Superabsorption is a quantum collective effect where transitions between the states of the molecules interfere constructively," James Quach, corresponding author of the study, told New Atlas. "Constructive interference occurs in all kinds of waves (light, sound, waves on water), and occurs when different waves add up to give a larger effect than either wave on its own. Crucially this allows the combined molecules to absorb light more efficiently than if each molecule were acting individually." In a quantum battery, this phenomenon would have a very clear benefit. The more energy-storing molecules you have, the more efficiently they'll be able to absorb that energy -- in other words, the bigger you make the battery, the faster it will charge. At least, that's how it should work in theory. Superabsorption had yet to be demonstrated on a scale large enough to build quantum batteries, but the new study has now managed just that.

To build their test device, the researchers placed an active layer of light-absorbing molecules -- a dye known as Lumogen-F Orange -- in a microcavity between two mirrors. "The mirrors in this microcavity were made using a standard method to make high quality mirrors," explained Quach. "This is to use alternating layers of dielectric materials -- silicon dioxide and niobium pentoxide -- to create what is known as a 'distributed Bragg reflector.' This produces mirrors which reflect much more of the light than a typical metal/glass mirror. This is important as we want light to stay inside the cavity as long as possible." The team then used ultrafast transient-absorption spectroscopy to measure how the dye molecules were storing the energy and how fast the whole device was charging. And sure enough, as the size of the microcavity and the number of molecules increased, the charging time decreased, demonstrating superabsorption at work. "The idea here is a proof-of-principle that enhanced absorption of light is possible in such a device," Quach told New Atlas. "The key challenge though is to bridge the gap between the proof-of-principle here for a small device, and exploiting the same ideas in larger usable devices. The next steps are to explore how this can be combined with other ways of storing and transferring energy, to provide a device that could be practically useful."

The research was published in the journal Science Advances.

Research by South African scientists suggests that Omicron could displace the Delta variant of the coronavirus because infection with the new variant boosts immunity to the older one. From a report: The study only covered a small group of people and has not been peer-reviewed, but it found that people who were infected with Omicron, especially those who were vaccinated, developed enhanced immunity to the Delta variant. The analysis enrolled 33 vaccinated and unvaccinated people who were infected with the Omicron variant in South Africa. While the authors found that neutralisation of Omicron increased 14-fold over 14 days after the enrolment, they also found that there was a 4.4-fold increase in neutralisation of the Delta variant. "The increase in Delta variant neutralization in individuals infected with Omicron may result in decreased ability of Delta to re-infect those individuals," the scientists who conducted the study said.

"E-commerce sales jumped nearly 32 percent in 2020 compared to the prior year, according to U.S. Census Bureau data," reports Politico — and this year "online sales are on track to outpace that record..."

"Now, cities, climate scientists and companies are trying to figure out the consequences for the planet." The most recent research is starting to incorporate more of the complexities of retail. In January, MIT's Real Estate Innovation Lab published a study that simulated hundreds of thousands of those kinds of scenarios and found online shopping to be more sustainable than traditional retail 75 percent of the time... Most research suggests that ordering goods for delivery is more beneficial for the environment because it means people are making fewer individual shopping trips. The average U.S. consumer goes to the grocery store at least 300 times a year. If they drove there, it was likely in a gas-powered vehicle. Plus, there tends to be higher energy demands at storefronts compared to warehouses. But that scale "could easily tip in the other direction," according to a study of the U.S. market published last spring by the sustainable investment firm Generation. The firm's researchers found that e-commerce is 17 percent more carbon efficient than traditional retail, but could change with a few tweaks to their assumptions, such as the number of items purchased in a single visit, the amount of packaging and the efficiency of last-mile delivery...

In an email, Amazon spokesperson Luis Davila pointed to findings by company scientists that suggest online shopping produces fewer emissions than driving to shop at a store; for instance, the company estimates that a single delivery van trip can take 100 round-trip car journeys off the road, on average. During the pandemic, customers made fewer trips to Whole Foods Market stores and other brick-and-mortar Amazon locations and shifted to home delivery, which also lowered emissions. But take a step back, and a bigger, more complex picture emerges. From 2019 to 2020, Amazon's U.S. sales jumped 36 percent to $263.5 billion. By the company's own account, its overall emissions spiked 19 percent, equivalent to running 15 coal plants for one year. More fossil fuel use and investments in buildings, data servers and transportation were key drivers.

That figure reflects its response to consumer demand during Covid-19, but doesn't capture progress Amazon made, Davila said. He said the company tracks the amount of carbon per dollar of gross merchandise sales — a concept known as carbon intensity — and by that measure, Amazon decreased the amount of carbon per purchase last year by 16 percent. In a blog post in June, a company scientist argued that this metric allows high-growth companies like Amazon to identify efficiencies. Amazon also reduced emissions from the electricity it bought by 4 percent due to new investments in clean energy, despite expanding its buildings' square footage. The company is about two-thirds of the way toward 100 percent renewable energy — a key pillar of the company's plan to reach net-zero emissions by 2040.

Emissions from deliveries are expected to decrease as Amazon deploys 100,000 electric vans in the coming decade. Davila did not disclose what portion of the company's fleet that accounts for today.
The director of MIT's Real Estate Innovation Lab also warns that cardboard boxes are some of the largest carbon pollutants in the system regardless of the method of delivery. (Politico points out most packaging ultimately "ends up in a landfill or is burned to produce energy, generating 105.5 million metric tons of carbon dioxide last year, according to federal data.") That data also shows only 9% of plastic gets recycled, "because flexible plastic films and pouches and many take out containers still aren't recyclable. Neither are plastic bags, unless consumers bring them to the grocery store."

One recycler tells the site that many companies are now promising to use more recycled materials in their packaging, including Amazon, PepsiCo, Coca Cola and Target — but urges "extended producer responsibility," in which companies (not taxpayers) cover the costs of cleaning up their packaging.

Coinbase Global is adding a slew of social-networking capabilities, one of which will make it easier for traders to share information about their allocations on platforms such as Instagram and Twitter. From a report: The biggest U.S. cryptocurrency exchange said Friday it's adding a Share button that will let traders detail what coins they own on social networks. More ways of sharing data about trades are in the works as well, the company said in a blog. The effort is likely aimed at harnessing word of mouth about crypto investing to attract more users. Coinbase said this week that its monthly transacting users had decreased sequentially in the third quarter. At the same time, the firm boosted its recurring-user forecast for the full year.

Peloton, the makers of an internet-connected exercise bike, saw their stock price drop 35% overnight on Thursday, reports CNBC. "At least four Wall Street investment firms downgraded the stock following Peloton's dismal fiscal first-quarter financial report... Peloton's stock has fallen 63% year to date."

The company had cut its annual revenue forecast — by $1 billion — and lowered its projections for both profit margins and paying subscribers. Bloomberg reports: At best, Peloton currently expects to have 3.45 million connected fitness subscriptions by the end of the fiscal year. It had previously called for 3.63 million. And gross profit margin will be 32%, compared with an earlier forecast of 34%. All that will add up to a loss of as much as $475 million, excluding some items....

On a more upbeat note, the company hinted that it plans to launch new products in the coming weeks and months. Peloton has been working on a rowing machine and a heart-rate monitor that attaches to a wearer's arm, Bloomberg News has reported.
The article suggests Peloton's business was hurt by the end of lockdowns, supply-chain constraints, and the cost of freight. But they also point out another factor. "Like several other companies, Peloton also blamed Apple Inc.'s ad-related privacy changes, which have made it more difficult to target shoppers based on their interests." Apple's new Ad Tracking Transparency feature (or "ATT") now first asks users to deny or allow apps to track their activity for the targeted advertising which had apparently been boosting Peloton's business.

And tlhIngan (Slashdot reader #30,335) tipped us off to a larger trend, since Gizmodo reports that Peloton "isn't the only company that has pointed accusingly at Apple lately." When reporting its third quarter earnings at the end of October, Facebook (now called Meta) — which depends on targeted ads for almost 98% of its revenue — said that ATT had decreased the accuracy of its ad targeting. The feature also increased "the cost of driving outcomes" for advertisers, Facebook COO Sheryl Sandberg explained, and made it harder to measure those outcomes. "Overall, if it wasn't for Apple's iOS 14 changes, we would have seen positive quarter-over-quarter revenue growth," Sandberg said.

On Sunday, the Financial Times reported that ATT had cost Snap, Facebook, Twitter, and YouTube an estimated $9.85 billion in lost revenue in the second half of this year. That's an 87% increase year over year.

During the first three months of 2021, the United States installed its 100,000th EV charger. Ars Technica reports on the important electric vehicle milestone: Of course, the actual composition of those chargers is important. It's no good having half a million places to plug in if they're all level 1 (120 V AC) chargers that take days to top up a battery EV. But a new report (PDF) from the National Renewable Energy Laboratory has dug into the data, looking at trends to see whether the nation is on track to meet its goals. At first glance, the news is positive. We added 4,566 new chargers during Q1 2021 for a total of 100,709. That means the US is already 20 percent of the way to Biden's 2030 goal. Most of those were level 2 (240 V AC) chargers, which saw 5.4-percent growth. The number of level 1 chargers actually decreased by 2.4 percent, mostly as ChargePoint decommissioned them in favor of level 2 devices.

Because a level 2 charger usually takes 8-10 hours to fully recharge a 250-300 mile BEV, drivers (particularly those who have yet to convert to an electric car) are probably more interested in the number of the faster level 3 (usually known as DC fast) chargers. Depending upon the car and the power output of the DC fast charger, these can charge a battery to 80 percent in 20-50 minutes. There was essentially no growth in DC fast chargers between Q4 2020 and Q1 2021. After multiple quarters of rapid expansion, the number of public DC fast charging ports grew by just 0.4 percent. The NREL attributes this to the integration between ChargePoint's and Greenlots' APIs [...].

Level 2 chargers can recharge any electric car, but not all BEVs can plug in to all DC fast chargers. All US Teslas use a proprietary charging plug, and 56.7 percent of all public DC fast chargers in the US are part of the Tesla Supercharger network. The various charging network APIs don't all report exactly the same information in exactly the same way, so the NREL was only able to determine the charging power for a limited number (6,821) of DC fast chargers. That led to a rather scary-looking pie chart on the Department of Energy's website showing that 40 percent of DC fast chargers were only able to supply 50 kW or less. However, the chart is based on only 6,821 chargers and excludes almost the entire Tesla Supercharger network from its data set.

Long-time Slashdot reader phalse phace quotes USA Today: The dwindling populations of the American bumblebee and their complete disappearance from eight states has led to a call for the bee to be placed under the Endangered Species Act before they face extinction.

Maine, Rhode Island, New Hampshire, Vermont, Idaho, North Dakota, Wyoming, and Oregon each have zero or close to zero American bumblebees left, according to a petition by the Center for Biological Diversity and Bombus Pollinators Association of Law Students...

Over the last two decades, the American bumblebee population has decreased by 89% across the U.S. New York had a decline of 99% and they disappeared from the northern part of Illinois that has seen a 74% decrease in population since 2004, the petition said.

Climate change, pesticides, disease, habitat loss and competition from honey bees are listed as driving the bee to extinction... The loss of the insect could cause serious repercussions to the environment and crop production due to them being essential pollinators in agriculture. If the American bumblebee is added to the endangered species list, it will join the rusty-patched bumblebee, and If granted federal protection, anyone found to have killed or harmed the bee could face up to $13,000 in fines.

Toxic PFAS compounds are contaminating the air inside homes, classrooms and stores at alarming levels, a new study has found. From a report: Researchers with the University of Rhode Island and Green Science Policy Institute tested indoor air at 20 sites and detected the "forever chemicals" in 17 locations. The airborne compounds are thought to break off of PFAS-treated products such as carpeting and clothing and attach to dust or freely float through the indoor environment. Experts previously considered food and water to be the two main routes by which humans are exposed to PFAS, but the study's authors note that many humans spend about 90% of their time indoors, and the findings suggest that breathing in the chemicals probably represents a third significant exposure route. "It's an underestimated and potentially important source of exposure to PFAS," said Tom Bruton, a co-author and senior scientist at Green Science.

PFAS, or per- and polyfluoroalkyl substances, are a class of about 9,000 compounds used to make products water-, stain- or heat-resistant. Because they are so effective, the chemicals are used across dozens of industries and are in thousands of everyday consumer products such as stain guards, carpeting and shoes. Textile manufacturers use them to produce waterproof clothing, and they are used in floor waxes, nonstick cookware, food packaging, cosmetics, firefighting foam and much more. PFAS are dubbed "forever chemicals" because they do not naturally break down. They accumulate in animals, including humans, and are linked to cancer, birth defects, liver disease, thyroid disease, decreased immunity, hormone disruption and a range of other serious health problems. A February Guardian analysis of household products found fluorine, an indicator of PFAS, present in 15 items. The chemicals are so widely used that it is difficult to say with precision where all the airborne PFAS are coming from, though the new study also detected their presence in carpets and clothing at some sites.

An anonymous reader shares the findings of a new study from the University of Chicago. From a report: If service becomes slow when you're trying to send a quick email on your smartphone, you might scroll through your network options and discover how many Wi-Fi networks there are. In fact, this plethora of options is itself the problem. These networks are in competition with one another, limiting the speed at which each can operate. University of Chicago researchers have demonstrated how this increased network competition could negatively impact internet service for everyday users.

When a cellular provider, such as T-Mobile or AT&T, licenses a spectrum band from the FCC, they reserve its exclusive use. As a result, networks operating on licensed bands experience little interference. This allows providers to establish fast and reliable service, but it comes at a cost. To improve bandwidth [to accommodate] more users] without breaking the bank, these providers have begun to also use the unlicensed spectrum via cellular networks using a mode called licensed assisted access (LAA), which operates on the same bands used for Wi-Fi. [The researchers] set out to examine how this shared use of the unlicensed spectrum, called coexistence, impacted both Wi-Fi and cellular users.

"We actually found an LAA station located on the UChicago campus, on a pole in front of the bookstore, and in this outside space campus Wi-Fi is also in use," [Monisha Ghosh, associate member in the Department of Computer Science at the University of Chicago and research professor in the Pritzker School of Molecular Engineering] said. "That provided an experimental platform in our backyard, so we started taking measurements." [...] By accessing multiple networks simultaneously, the group found that competition decreased performance -- reducing the amount of data transmitted, the speed of transmission, and the signal quality. This competition was particularly detrimental to Wi-Fi. When LAA was also in active use, data transmitted by Wi-Fi users decreased up to 97%. Conversely, LAA data only exhibited a 35% decrease when Wi-FI was also in use. Ghosh explained that the incompatibility between Wi-Fi and LAA owes in part to the different protocols each employs to deal with heavy internet traffic. The researchers presented their findings in a paper via arXiv.

An anonymous reader quotes a report from Phys.Org: Scientists at KAIST have fabricated a laser system that generates highly interactive quantum particles at room temperature. Their findings, published in the journal Nature Photonics, could lead to a single microcavity laser system that requires lower threshold energy as its energy loss increases. The system, developed by KAIST physicist Yong-Hoon Cho and colleagues, involves shining light through a single hexagonal-shaped microcavity treated with a loss-modulated silicon nitride substrate. The system design leads to the generation of a polariton laser at room temperature, which is exciting because this usually requires cryogenic temperatures.

The researchers found another unique and counter-intuitive feature of this design. Normally, energy is lost during laser operation. But in this system, as energy loss increased, the amount of energy needed to induce lasing decreased. Exploiting this phenomenon could lead to the development of high efficiency, low threshold lasers for future quantum optical devices. [...] The key is the design and materials. The hexagonal microcavity divides light particles into two different modes: one that passes through the upward-facing triangle of the hexagon and another that passes through its downward-facing triangle. Both modes of light particles have the same energy and path but don't interact with each other. However, the light particles do interact with other particles called excitons, provided by the hexagonal microcavity, which is made of semiconductors. This interaction leads to the generation of new quantum particles called polaritons that then interact with each other to generate the polariton laser. By controlling the degree of loss between the microcavity and the semiconductor substrate, an intriguing phenomenon arises, with the threshold energy becoming smaller as energy loss increases.

Gas flaring worldwide decreased by 5 percent in the pandemic year, mostly because of lower demand for oil, according to a recent report from the World Bank. From a report: While the overall drop was expected, the report offered a detailed picture of the flaring activities around the world, with steep declines in some areas, like the United States, and surprising increases in others, notably China. Flaring occurs when the gas that emerges with crude oil is burned off rather than captured. That burning emits carbon dioxide, a gas that is the main contributor to climate change. According to World Bank officials, flaring adds roughly 400 million metric tons of CO2 equivalent emissions to the atmosphere every year. According to the report, Russia was responsible for more flaring overall than any other country in 2020, contributing 15 percent of the global total. But within Russia, there were areas of progress. Burning continued to decrease in the Khanty-Mansi region of Siberia, where flaring volumes have dropped by nearly 80 percent over the previous 15 years.

An anonymous reader quotes a report from Phys.Org: Scientists from Stony Brook University and the Max Planck Institute of Animal Behavior have pieced together a timeline of how brain and body size evolved in mammals over the last 150 million years. The findings, published in Science Advances, show that brain size relative to body size -- long considered an indicator of animal intelligence -- has not followed a stable scale over evolutionary time. The international team of 22 scientists, including biologists, evolutionary statisticians, and anthropologists, compared the brain mass of 1400 living and extinct mammals. For the 107 fossils examined -- among them ancient whales and the most ancient Old World monkey skull ever found -- they used endocranial volume data from skulls instead of brain mass data. The brain measurements were then analyzed along with body size to compare the scale of brain size to body size over deep evolutionary time.

According to the study, "big-brained" humans, dolphins, and elephants, for example, attained their proportions in different ways. Elephants increased in body size, but surprisingly, even more in brain size. Dolphins, on the other hand, generally decreased their body size while increasing brain size. Great apes showed a wide variety of body sizes, with a general trend towards increases in brain and body size. In comparison, ancestral hominins, which represent the human line, showed a relative decrease in body size and increase in brain size compared to great apes. The authors say that these complex patterns urge a re-evaluation of the deeply rooted paradigm that comparing brain size to body size for any species provides a measure of the species' intelligence. The study has been published in the journal Science Advances.