An international team of scientists used 1.8 billion letters of genetic code from more than 9,500 species covering almost 8,000 known flowering plant genera to create the most up-to-date understanding of the flowering plant tree of life. The research has been published in the journal Nature. Phys.Org reports: The major milestone for plant science, led by [Royal Botanic Gardens, Kew] and involving 138 organizations internationally, was built on 15 times more data than any comparable studies of the flowering plant tree of life. Among the species sequenced for this study, more than 800 have never had their DNA sequenced before. The sheer amount of data unlocked by this research, which would take a single computer 18 years to process, is a huge stride towards building a tree of life for all 330,000 known species of flowering plants -- a massive undertaking by Kew's Tree of Life Initiative.

The flowering plant tree of life, much like our own family tree, enables us to understand how different species are related to each other. The tree of life is uncovered by comparing DNA sequences between different species to identify changes (mutations) that accumulate over time like a molecular fossil record. Our understanding of the tree of life is improving rapidly in tandem with advances in DNA sequencing technology. For this study, new genomic techniques were developed to magnetically capture hundreds of genes and hundreds of thousands of letters of genetic code from every sample, orders of magnitude more than earlier methods. A key advantage of the team's approach is that it enables a wide diversity of plant material, old and new, to be sequenced, even when the DNA is badly damaged. The vast treasure troves of dried plant material in the world's herbarium collections, which comprise nearly 400 million scientific specimens of plants, can now be studied genetically.

[...] Across all 9,506 species sequenced, more than 3,400 came from material sourced from 163 herbaria in 48 countries. Additional material from plant collections around the world (e.g., DNA banks, seeds, living collections) have been vital for filling key knowledge gaps to shed new light on the history of flowering plant evolution. The team also benefited from publicly available data for more than 1,900 species, highlighting value of the open science approach to future genomic research. Flowering plants alone account for about 90% of all known plant life on land and are found virtually everywhere on the planet -- from the steamiest tropics to the rocky outcrops of the Antarctic Peninsula. [...] Utilizing 200 fossils, the authors scaled their tree of life to time, revealing how flowering plants evolved across geological time. They found that early flowering plants did indeed explode in diversity, giving rise to more than 80% of the major lineages that exist today shortly after their origin. However, this trend then declined to a steadier rate for the next 100 million years until another surge in diversification about 40 million years ago, coinciding with a global decline in temperatures. These new insights would have fascinated Darwin and will surely help today's scientists grappling with the challenges of understanding how and why species diversify. A list of "remarkable species" included in the flowering plant tree of life is embedded below the article.

Looking ahead, the study's authors believe this data will aid future attempts to identify new species, refine plant classification, uncover new medicinal compounds, and conserve plants in the face of climate change and biodiversity loss.

Department of Transportation Secretary Pete Buttigieg announced new rules for the airline industry that will require airlines to automatically give cash refunds to passengers for canceled and significantly delayed flights. They will also require airlines to give cash refunds if your bags are lost and not delivered within 12 hours.

"This is a big day for America's flying public," said Buttigieg at a Wednesday morning news conference. According to Buttigieg, the new rules are the biggest expansion of passenger rights in the department's history. ABC News reports: Airlines can no longer decide how long a delay must be before a refund is issued. Under the new DOT rules, the delays covered would be more than three hours for domestic flights and more than six hours for international flights, the agency said. This includes tickets purchased directly from airlines, travel agents and third-party sites such as Expedia and Travelocity.

The refunds must be issued within seven days, according to the new DOT rules, and must be in cash unless the passenger chooses another form of compensation. Airlines can no longer issue refunds in forms of vouchers or credits when consumers are entitled to receive cash. Airlines will have six months to comply with the new rules.

The DOT said it is also working on rules related to family seating fees, enhancing rights for wheelchair-traveling passengers for safe and dignified travel and mandating compensation and amenities if flights are delayed or canceled by airlines. Buttigieg said the DOT is also protecting airline passengers from being surprised by hidden fees -- a move he estimates will have Americans billions of dollars every year. The DOT rules include that passengers will receive refunds for extra services paid for and not provided, such as Wi-Fi, seat selection or inflight entertainment.

Samantha Cole reports via 404 Media: A Japan-based online art platform is banning kink content for users based in the US and UK, as laws in these countries continue to tighten around sites that allow erotic content. Pixiv is an image gallery site where artists primarily share illustrations, manga, and novels. The site announced on April 22 that starting April 25, users whose account region is set to the US or UK will be subject to Pixiv's new terms of use, "Restrictions for Healthy Expression in Specific Countries and Regions."

The restrictions include several kinds of content that are illegal in the US, including sexualized depictions of minors and bestiality, as well as non-consensual depictions and deepfakes. But it also includes "content that appeals to the prurient interest, is patently offensive in light of community standards where you are located or where such content may be accessed or distributed, lacks serious literary, artistic, political, or scientific value, or otherwise violates any applicable obscenity laws, rules or regulations." This is an invocation of the Miller test, which determines non-constitutionally protected obscenity. "I'd never say this a few years ago, but it's my personal fear that the next step is most major internet hosting services implementing these policies on an infrastructure level," said an artist who goes by kradeelav. "My colleagues are certainly planning for it by specifically looking for kink-friendly hosts, to actually making homebrew servers themselves in worst-case scenarios."

An anonymous reader quotes a report from Ars Technica: Two researchers at the University of California, Davis -- Yanning Li and Alan Jenn -- have determined that nearly two-thirds of [California's] feeder lines don't have the capacity that will likely be needed for car charging. Updating to handle the rising demand might set its utilities back as much as 40 percent of the existing grid's capital cost. Li and Jenn aren't the first to look at how well existing grids can handle growing electric vehicle sales; other research has found various ways that different grids fall short. However, they have access to uniquely detailed data relevant to California's ability to distribute electricity (they do not concern themselves with generation). They have information on every substation, feeder line, and transformer that delivers electrons to customers of the state's three largest utilities, which collectively cover nearly 90 percent of the state's population. In total, they know the capacity that can be delivered through over 1,600 substations and 5,000 feeders.[...]

By 2025, only about 7 percent of the feeders will experience periods of overload. By 2030, that figure will grow to 27 percent, and by 2035 -- only about a decade away -- about half of the feeders will be overloaded. Problems grow a bit more slowly after that, with two-thirds of the feeders overloaded by 2045, a decade after all cars sold in California will be EVs. At that point, total electrical demand will be close to twice the existing capacity. The problems aren't evenly distributed, though. They appear first in high-population areas like the Bay Area. And throughout this period, most of the problems are in feeders that serve residential and mixed-use neighborhoods. The feeders that serve neighborhoods that are primarily business-focused don't see the same coordinated surge in demand that occurs as people get home from work and plug in; they're better able to serve the more erratic use of charging stations at office complexes and shopping centers. In terms of the grid, residential services will need to see their capacity expand by about 16 gigawatts by 2045. Public chargers will need nine gigawatts worth of added capacity by the same point. The one wild card is direct current fast charging. Eliminating fast chargers entirely would reduce the number of feeders that need upgrades by 12 percent. Converting all public stations to DC fast charging, in contrast, would boost that number by 15 percent. So the details of the upgrades that will be needed will be very sensitive to the impatience of EV drivers.

Paying for the necessary upgrades will be pricey, but there's a lot of uncertainty here. Li and Jenn came up with a range of anywhere between $6 billion and $20 billion. They put this in context in two ways. The total capital invested in the existing grid is estimated to be $51 billion, so the cost of updating it could be well over a third of its total value. At the same time, the costs will be spread out over decades and only total up to (at most) three times the grid's annual operation and maintenance costs. So in any one year, the costs shouldn't be crippling. All that might be expected to drive the cost of electricity up. But Li and Jenn suggest that the greater volume of electricity consumption will exert a downward pressure on prices (people will pay more overall but pay somewhat less per unit of electricity). Based on a few economic assumptions, the researchers conclude that this would roughly offset the costs of the necessary grid expansion, so the price per unit of electricity would be largely static. The findings have been published in the journal Proceedings of the National Academy of Sciences (PNAS).

President Joe Biden signed a foreign aid package that includes a bill that would ban TikTok if China-based parent company ByteDance fails to divest the app within a year. The Verge: The divest-or-ban bill is now law, starting the clock for ByteDance to make its move. The company has an initial nine months to sort out a deal, though the president could extend that another three months if he sees progress. While just recently the legislation seemed like it would stall out in the Senate after being passed as a standalone bill in the House, political maneuvering helped usher it through to Biden's desk. The House packaged the TikTok bill -- which upped the timeline for divestment from the six months allowed in the earlier version -- with foreign aid to US allies, which effectively forced the Senate to consider the measures together. The longer divestment period also seemed to get some lawmakers who were on the fence on board.

The Federal Trade Commission narrowly voted Tuesday to ban nearly all noncompetes, employment agreements that typically prevent workers from joining competing businesses or launching ones of their own. From a report: The FTC received more than 26,000 public comments in the months leading up to the vote. Chair Lina Khan referenced on Tuesday some of the stories she had heard from workers. "We heard from employees who, because of noncompetes, were stuck in abusive workplaces," she said. "One person noted when an employer merged with an organization whose religious principles conflicted with their own, a noncompete kept the worker locked in place and unable to freely switch to a job that didn't conflict with their religious practices." These accounts, she said, "pointed to the basic reality of how robbing people of their economic liberty also robs them of all sorts of other freedoms."

The FTC estimates about 30 million people, or one in five American workers, from minimum wage earners to CEOs, are bound by noncompetes. It says the policy change could lead to increased wages totaling nearly $300 billion per year by encouraging people to swap jobs freely. The ban, which will take effect later this year, carves out an exception for existing noncompetes that companies have given their senior executives, on the grounds that these agreements are more likely to have been negotiated. The FTC says employers should not enforce other existing noncompete agreements.

Oracle Chairman Larry Ellison said Tuesday that the company is moving its world headquarters to Nashville, Tennessee, to be closer to a major health-care epicenter. CNBC reports: In a wide-ranging conversation with Bill Frist, a former U.S. Senate Majority Leader, Ellison said Oracle is moving a "huge campus" to Nashville, "which will ultimately be our world headquarters." He said Nashville is an established health center and a "fabulous place to live," one that Oracle employees are excited about. "It's the center of the industry we're most concerned about, which is the health-care industry," Ellison said. The announcement was seemingly spur-of-the-moment. "I shouldn't have said that," Ellison told Frist, a longtime health-care industry veteran who represented Tennessee in the Senate. The pair spoke during a fireside chat at the Oracle Health Summit in Nashville.

Nashville has been a major player in the health-care scene for decades, and the city is now home to a vibrant network of health systems, startups and investment firms. The city's reputation as a health-care hub was catalyzed when HCA Healthcare, one of the first for-profit hospital companies in the U.S., was founded there in 1968. HCA helped attract troves of health-care professionals to Nashville, and other organizations quickly followed suit. Oracle has been developing its new $1.2 billion campus in the city for about three years, according to The Tennessean. "Our people love it here, and we think it's the center of our future," Ellison said.

The Federal Trade Commission is set to vote Tuesday afternoon on a proposal to ban noncompete agreements, which prevent workers from taking positions at competitors for a period of time after they leave a job. From a report: The ban could be a win for workers -- particularly at the low end of the income scale. Critics of these agreements say they stifle innovation and wage growth by restricting workers' ability to take new jobs that pay higher wages or offer some other opportunity. They also make it tougher for employers to hire strong talent, lessening competition.

Some states have laws limiting noncompetes to higher-income folks or banning them altogether -- but most don't. Experts told Axios that the final rule will likely look similar to the draft proposal, which was a broad prohibition on all noncompetes, even for executives. Any final rule is unlikely to take effect for many years -- if ever, as it will surely get tied up in court. The Chamber of Commerce, which opposes the ban, has already said it's ready and willing to file a lawsuit.

The U.S. publishing industry is driven by celebrity authors and repeat bestsellers, according to testimony from a blocked merger between Penguin Random House and Simon & Schuster. Only 50 authors sell over 500,000 copies annually, with 96% of books selling under 1,000 copies. Publishing houses spend most of their advance money on celebrity books, which along with backlist titles like The Bible, account for the bulk of their revenue and fund less commercially successful books.

An anonymous reader quotes a report from the Washington Post: In sunny California, solar panels are everywhere. They sit in dry, desert landscapes in the Central Valley and are scattered over rooftops in Los Angeles's urban center. By last count, the state had nearly 47 gigawatts of solar power installed -- enough to power 13.9 million homes and provide over a quarter of the Golden State's electricity. But now, the state and its grid operator are grappling with a strange reality: There is so much solar on the grid that, on sunny spring days when there's not as much demand, electricity prices go negative. Gigawatts of solar are "curtailed" -- essentially, thrown away. In response, California has cut back incentives for rooftop solar and slowed the pace of installing panels. But the diminishing economic returns may slow the development of solar in a state that has tried to move to renewable energy. And as other states build more and more solar plants of their own, they may soon face the same problems.

Curtailing solar isn't technically difficult -- according to Paul Denholm, senior research fellow at the National Renewable Energy Laboratory, it's equivalent to flipping a switch for grid operators. But throwing away free power raises electricity prices. It has also undercut the benefits of installing rooftop solar. Since the 1990s, California has been paying owners of rooftop solar panels when they export their energy to the grid. That meant that rooftop solar owners got $0.20 to $0.30 for each kilowatt-hour of electricity that they dispatched. But a year ago, the state changed this system, known as "net-metering," and now only compensates new solar panel owners for how much their power is worth to the grid. In the spring, when the duck curve is deepest, that number can dip close to zero. Customers can get more money back if they install batteries and provide power to the grid in the early evening or morning.

The change has sparked a huge backlash from Californians and rooftop solar companies, which say that their businesses are flagging. Indeed, Wood Mackenzie predicts that California residential solar installations in 2024 will fall by around 40 percent. Some state politicians are now trying to reverse the rule. "Under the CPUC's leadership California is responsible for the largest loss of solar jobs in our nation's history," Bernadette del Chiaro, the executive director of the California Solar and Storage Association, said in a statement referring to California's public utility commission. But experts say that it reflects how the economics of solar are changing in a state that has gone all-in on the technology. [...] To cope, [California's grid operator, known as CAISO] is selling some excess power to nearby states; California is also planning to install additional storage and batteries to hold solar power until later in the afternoon. Transmission lines that can carry electricity to nearby regions will also help -- some of the lost power comes from regions where there simply aren't enough power lines to carry a sudden burst of solar. Denholm says the state is starting to take the steps needed to deal with the glut. "There are fundamental limits to how much solar we can put on the grid before you start needing a lot of storage," Denholm said. "You can't just sit around and do nothing." Further reading: The Energy Institute discusses this problem in a recent blog post.

Since 2020, the residential electricity rates in California have risen by as much as 40% after adjusting for inflation. While there's been "a lot of finger-pointing about the cause of these increases," the authors note that the impact on rates is multiplied when customers install their own generation and buy fewer kilowatts-hours from the grid because those households "contribute less towards all the fixed costs in the system." These fixed costs include: vegetation management, grid hardening, distribution line undergrounding, EV charging stations, subsidies for low income customers, energy efficiency programs, and the poles and wires that we all rely on whether we are taking electricity off the grid or putting it onto the grid from our rooftop PV systems.

"Since those fixed costs still need to be paid, rates go up, shifting costs onto the kWhs still being bought from the grid."

An anonymous reader quotes a report from Ars Technica: Home Assistant, until recently, has been a wide-ranging and hard-to-define project. The open smart home platform is an open source OS you can run anywhere that aims to connect all your devices together. But it's also bespoke Raspberry Pi hardware, in Yellow and Green. It's entirely free, but it also receives funding through a private cloud services company, Nabu Casa. It contains tiny board project ESPHome and other inter-connected bits. It has wide-ranging voice assistant ambitions, but it doesn't want to be Alexa or Google Assistant. Home Assistant is a lot.

After an announcement this weekend, however, Home Assistant's shape is a bit easier to draw out. All of the project's ambitions now fall under the Open Home Foundation, a non-profit organization that now contains Home Assistant and more than 240 related bits. Its mission statement is refreshing, and refreshingly honest about the state of modern open source projects. "We've done this to create a bulwark against surveillance capitalism, the risk of buyout, and open-source projects becoming abandonware," the Open Home Foundation states in a press release. "To an extent, this protection extends even against our future selves -- so that smart home users can continue to benefit for years, if not decades. No matter what comes." Along with keeping Home Assistant funded and secure from buy-outs or mission creep, the foundation intends to help fund and collaborate with external projects crucial to Home Assistant, like Z-Wave JS and Zigbee2MQTT.

Home Assistant's ambitions don't stop with money and board seats, though. They aim to "be an active political advocate" in the smart home field, toward three primary principles:

- Data privacy, which means devices with local-only options, and cloud services with explicit permissions
- Choice in using devices with one another through open standards and local APIs
- Sustainability by repurposing old devices and appliances beyond company-defined lifetimes

Notably, individuals cannot contribute modest-size donations to the Open Home Foundation. Instead, the foundation asks supporters to purchase a Nabu Casa subscription or contribute code or other help to its open source projects. Further reading: The Verge's interview with Home Assistant founder Paulus Schoutsen

Scorching weather has baked Europe in more days of "extreme heat stress" than its scientists have ever seen. The Guardian: Heat-trapping pollutants that clog the atmosphere helped push temperatures in Europe last year to the highest or second-highest levels ever recorded, according to the EU's Earth-watching service Copernicus and the World Meteorological Organization (WMO). Europeans are suffering with unprecedented heat during the day and are stressed by uncomfortable warmth at night. The death rate from hot weather has risen 30% in Europe in two decades, the joint State of the Climate report from the two organisations found.

"The cost of climate action may seem high," said WMO secretary-general Celeste Saulo, "but the cost of inaction is much higher." The report found that temperatures across Europe were above average for 11 months of 2023, including the warmest September since records began. The hot and dry weather fuelled large fires that ravaged villages and spewed smoke that choked far-off cities. The blazes that firefighters battled were particularly fierce in drought-stricken southern countries such as Portugal, Spain and Italy. Greece was hit by the largest wildfire recorded in the EU, which burned 96,000 hectares of land, according to the report. Heavy rain also led to deadly floods. Europe was about 7% wetter in 2023 than the average over the last three decades, the report found, and one-third of its river network crossed the "high" flood threshold. One-sixth hit "severe" levels.

AmiMoJo writes: Knowing your ABCs is essential to academic success, but having a last name starting with A, B or C might also help make the grade. An analysis by University of Michigan researchers of more than 30 million grading records from U-M finds students with alphabetically lower-ranked names receive lower grades. This is due to sequential grading biases and the default order of students' submissions in Canvas -- the most widely used online learning management system -- which is based on alphabetical rank of their surnames.

What's more, the researchers found, those alphabetically disadvantaged students receive comments that are notably more negative and less polite, and exhibit lower grading quality measured by post-grade complaints from students.

President Joe Biden travels to Triangle, Virginia, Monday to mark Earth Day, where he'll unveil $7 billion in grant funding for solar power under the Inflation Reduction Act and announce new steps to stand up his administration's American Climate Corps -- a program popular with youth climate groups. From a report: The announcements come days after the Biden administration made several significant conservation announcements, including barring oil drilling on nearly half of the national petroleum reserve in Alaska. Under the Environmental Protection Agency's Solar for All program, the administration will announce funding awards to states territories, tribal governments, municipalities and nonprofits "to develop long-lasting solar programs that are targeted towards the communities and people who need them most," EPA Deputy Administrator Janet McCabe told reporters. Per McCabe, the funding will enable nearly one million households in low-income and disadvantaged communities to benefit from solar power, saving more than $350 million in electric costs annually and more than $8 billion over the life of the program for overburdened households.

A military court in Moscow on Monday sentenced Meta spokesperson Andy Stone to six years in prison for "publicly defending terrorism," a verdict handed down in absentia, RIA news agency reported. Reuters: Meta itself is designated an extremist organisation in Russia and its Facebook and Instagram social media platforms have been banned in the country since 2022 when Russia invaded Ukraine.

[...] Russia's interior ministry opened a criminal investigation into Stone late last year, without disclosing specific charges. RIA cited state investigators as saying Stone had published online comments that defended "aggressive, hostile and violent actions" towards Russian soldiers involved in what Moscow calls its "special military operation" in Ukraine.