Astronomers discover potential “water world” exoplanet nearby Earth that could support life

Scientists announced this week the discovery of a nearby “super-Earth” that could potentially support life, calling it a “water world.” 

The team, led by the University of Montreal, used observations from NASA’s Transiting Exoplanet Survey Satellite (TESS), as well as telescopes on the ground, to detect the exoplanet, which is described as potentially rocky like Earth, but larger. Named TOI-1452 b, it orbits a red dwarf star about 100 light years away from our planet, which scientists say is “fairly close.” 

Scientists have long theorized the possibility of other ocean planets, but they have been difficult to confirm. TOI-1452 b is roughly 70% larger than Earth and about five times as massive, which would be consistent with having a very deep ocean — but more research is still needed. 

NASA says the planet could also potentially be an enormous rock with little or no atmosphere — or even a rocky planet with an atmosphere made up of hydrogen or helium. 

Artistic rendition of the exoplanet TOI-1452 b, a small planet that may be entirely covered in a deep ocean.

Benoît Gougeon, Université de Montréal


A year on TOI-1452 b takes just 11 days, but it gets a similar amount of light from its smaller, cooler star as Venus does from the sun. Despite its close orbit, it’s located in the “habitable zone,” meaning it could have highly-coveted liquid water on its surface. 

If this “one-of-a-kind” exoplanet were confirmed to be a water world, its ocean would be significantly deeper than Earth’s. While our planet is 70% water, oceans account for less than 1% of the planet’s mass — whereas water on TOI-1452 b could make up as much as 30% of its mass, according to one simulation. 

“TOI-1452 b is one of the best candidates for an ocean planet that we have found to date,” said study lead Charles Cadieux. “Its radius and mass suggest a much lower density than what one would expect for a planet that is basically made up of metal and rock, like Earth.”

If that simulation is accurate, it would make the planet comparable to watery moons in our solar system, like Jupiter’s Ganymede and Callisto, which scientists believe hide deep oceans under their surfaces. 

Artistic representation of the surface of TOI-1452 b, which could be an “ocean planet”, i.e. a planet entirely covered by a thick layer of liquid water. 

Benoit Gougeon, Université de Montréal.


The James Webb Space Telescope is on a mission to understand the origins of our universe, but researchers say it could take some time on the side to observe TOI-1452 b, which, “in a stroke of good fortune,” appears in the constellation Draco, a part of the sky that Webb can see during most times of the year. 

“Our observations with the Webb Telescope will be essential to better understanding TOI-1452 b,” said researcher René Doyon, who also works with one of the four science instruments of the James Webb Space Telescope. “As soon as we can, we will book time on the Webb to observe this strange and wonderful world.”

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Watch a cannibal alligator chomp down on another gator in jaw-dropping video

On Aug. 4, Port Charlotte resident Tammy Shaw was paddleboarding in Silver Springs State Park in Florida, when she discovered a gruesome scene of cannibalism and carnage. A sizable alligator crouched in the spring just a short distance from Shaw’s inflatable boat, and clasped in its jaws was the limp body of another alligator — the bigger predator’s next meal, News 6 Orlando reported (opens in new tab).

As Shaw watched, the large gator lifted its head higher and then slammed its unresponsive prey into the water. 

Shaw captured a short video of the gators and posted it in the Facebook group Alligators of Florida (opens in new tab) on Aug. 10. Commenters were shocked that an alligator would eat another alligator. “I never knew they would actually eat one of their own,” one person wrote.

Yet cannibalism is not at all uncommon in alligators, Adam Rosenblatt, an assistant professor of biology at the University of North Florida who studies American alligators (Alligator mississippiensis), told Live Science in an email. Alligators eat other alligators for the same reason they eat anything else, he explained — they get hungry.

Related: Human remains found inside 500-pound alligator. How common are alligator attacks?

“Alligators will eat anything they can fit their jaws around, including mammals, birds, reptiles, amphibians, fish, insects, crustaceans, snails, and even fruits and seeds sometimes,” he said.

It’s also possible for alligators to eat other alligators that invade their territory, Rosenblatt added. Large male alligators, in particular, are often solitary and territorial, according to the conservation nonprofit Defenders of Wildlife (opens in new tab).

Alligators are master hunters, and not only when it comes to eating other alligators. They often simply swim directly up to small prey, like crabs and shrimp, and immediately gulp them down, Rosenblatt said, but with larger prey, such as pigs and deer, alligators can be very stealthy. Gators sometimes wait in the water for hours for big animals to approach to get a drink, before slowly advancing to avoid notice and then suddenly striking when they are 3 or 4 feet (about a meter) away.

“They’ll grab the prey by the head or by a leg, whatever the gator can get its mouth on, then drag the prey into the water to drown it,” Rosenblatt said. Alligators also sometimes do a “death roll,” where they quickly roll while holding prey, often breaking the prey’s neck or legs. Gators also kill turtles by using their powerful jaws to crush the turtles’ shells, he said. Alligators devour small prey whole, but with large prey, they vigorously shake it — as demonstrated by the bigger alligator in Shaw’s video — so that it will more easily break up into smaller pieces, according to the Smithsonian’s National Zoo and Conservation Biology Institute (opens in new tab). If the prey is very large, alligators use their death roll to tear it apart.

Though cannibalism is taboo in most modern human cultures, it’s very common among many animals, Rosenblatt said. For example, lions and chimpanzees are also known to eat their own kind. But even if people are squeamish about such observations, alligators won’t be changing their cannibal dining habits anytime soon.  

“Alligator cannibalism has occurred for millions of years and will continue to occur,” Rosenblatt said. “There’s no reason to expect its frequency to change in the near future.”

Originally published on Live Science.

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Air strike hits capital of Ethiopia’s Tigray region – hospital

NAIROBI, Aug 26 (Reuters) – An air strike killed at least seven people in the capital of Ethiopia’s northern Tigray region on Friday, medical officials there said, the first such attack after a four-month old ceasefire collapsed this week.

The officials said three children were among the dead but a a federal government spokesman denied any civilian casualties.

The air strike on Mekelle took place two days after fighting broke out again between the national government and Tigrayan forces on the border of the Tigray and Amhara regions, shattering the ceasefire.

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Tigrai Television, controlled by the regional authorities, blamed the federal government for the strike. No other military aircraft operate in Ethiopian airspace.

The Ethiopian government subsequently urged residents of Tigray to stay away from military facilities, saying it intended to “take actions to target the military forces”.

Kibrom Gebreselassie, chief executive of Ayder Hospital, said on Twitter the hospital had received four dead, including two children, and nine wounded.

He said the strike had hit a children’s playground. Reuters could not independently verify his account. It was not clear if there were any military facilities nearby.

Federal government spokesperson Legesse Tulu said news of civilian casualties was “lies and fabricated drama” and accused Tigrayan authorities of “dumping body bags”.

He denied government strikes hit civilian facilities and said they only targeted military sites.

Footage published by Tigrai TV showed a building with the roof blown off, revealing a twisted jumble of slides and emergency workers carrying a stretcher from behind a damaged pink wall painted with a giant butterfly.

TORN APART

Fasika Amdeslasie, a surgeon at Ayder Hospital, said a colleague at Mekelle Hospital told him it had received three more bodies – a mother and her child and another unidentified person – bringing the total number of dead to seven.

The bodies brought to Ayder included boy around 10, two women and a young teenager, he said.

“Their bodies were torn apart,” he told Reuters. “I have seen their bodies myself.”

The surgeon said that restrictions on medical supplies entering Tigray meant the hospital was short of vital supplies, including intravenous fluids, antibiotics and pain killers.

Ethiopian Health Minister Lia Tadesse did not immediately respond to requests for comment on the shortages.

A humanitarian source in Mekelle confirmed hearing an explosion and anti-aircraft gunfire in the city on Friday.

Government airstrikes have previously killed civilians, investigators said. In January, a drone strike killed 56 people and injured 30, including children, in a camp for displaced people in Dedebit, according to witnesses. The government did not respond to requests for comment.

War erupted in Tigray in November 2020 and spread to the neighbouring regions of Afar and Amhara a year ago. Last November, Tigrayan forces marched towards Addis Ababa but were driven back by a government offensive.

A ceasefire was announced in March after both sides fought to a stalemate and the government declared a humanitarian truce, allowing badly needed food aid into the region.

When fighting erupted this week, both blamed each other.

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Reporting by Nairobi Newsroom; Writing by George Obulutsa; editing by Angus MacSwan

Our Standards: The Thomson Reuters Trust Principles.

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Astronaut Spies “Intriguing Sight” Of Bright Dot On Earth From The ISS

Orbiting around 420 kilometers (261 miles) above our heads, the astronauts of the Internation Space Station (ISS) get a view of Earth like no other. Sometimes, it’s spectacular auroras, other times it’s something more… curious.   

European Space Agency (ESA) astronaut Samantha Cristoforetti – no stranger to having a bit of fun in space – took to Twitter yesterday to share what she called an “intriguing sight”, a bright dot apparently shining in the Negev desert in southern Israel.  

Nighttime passes create stunning, if slightly concerning, views of the lights twinkling away on Earth, but daytime passes don’t usually offer up such views.

“Intriguing sight! A bright dot in the Negev desert…so unusual to see human-made lights in day passes!” Cristoforetti tweeted.

So what is she seeing? According to Cristoforetti, the white speck showing up in the brown desert is “a concentrated solar power plant, one of the technologies to get renewable energy from the Sun. With one of the world’s tallest solar power towers!” 

The Ashalim solar thermal power station in the Israeli desert is indeed one of the world’s tallest solar power towers at around 250 meters (820 feet) tall. It’s surrounded by a sea of 50,000 mirrors that concentrate the sunlight to the tower like an extreme version of those people who use foil cones to reflect more sunlight to tan their faces.

The Ashalim solar power plant is surrounded by 50,000 mirrors. Imahe credit: Bright Source

It takes a whopping amount of reflective mirrors to catch enough light to be seen by the ISS in the daylight. As it happens, it takes certain circumstances for people back on Earth to be able to spot the astronauts doing their thing on the ISS, too.

Back in March 2020, a German photographer managed to snap the ISS from his backyard. In March of this year, an astrophotographer actually captured two astronauts out on a spacewalk from the ground in Germany, possibly the first time anyone has ever done that.

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Shia LaBeouf Denies Olivia Wilde Fired Him from Don’t Worry Darling

“You and I both know the reasons for my exit,” LaBeouf told director Wilde, claiming that he quit the movie due to inadequate rehearsal time.

Shia LaBeouf is claiming he quit “Don’t Worry Darling” after director Olivia Wilde said that he was fired from the production.

Following a Variety cover story with Wilde opening up about LaBeouf’s recasting and Harry Styles taking over the role, LaBeouf wrote an email to the “Booksmart” director addressing her “narrative” of events. LaBeouf shared the letter, along with text message exchanges and a personal video sent from Wilde to LaBeouf during production in 2020, with IndieWire. LaBeouf claims he quit the movie due to inadequate rehearsal time.

“What inspired this email today is your latest Variety story,” LaBeouf wrote to Wilde in part. “I am greatly honored by your words on my work; thank you, that felt good to read. I am a little confused about the narrative that I was fired, however. You and I both know the reasons for my exit. I quit your film because your actors & I couldn’t find time to rehearse. I have included as a reminder the screenshots of our text exchange on that day, and my text to Tobey [Emmerich].”

LaBeouf added, “I know that you are beginning your press run for DWD and that the news of my firing is attractive clickbait, as I am still persona-non-grata and may remain as such for the rest of my life.”

LaBeouf noted his exit date as August 17, 2020. The “Honey Boy” actor also shared that he is now 627 days sober and felt the need to weigh in on Wilde’s current statements about what transpired more than two years ago.

“Firing me never took place, Olivia. And while I fully understand the attractiveness of pushing that story because of the current social landscape, the social currency that brings, it is not the truth,” LaBeouf stated. “So I am humbly asking, as a person with an eye toward making things right, that you correct the narrative as best you can. I hope none of this negatively effects you, and that your film is successful in all the ways you want it to be.”

LaBeouf did not respond to IndieWire’s request for further comment, and representatives for Wilde declined to comment.

LaBeouf attached screenshots of texts allegedly from Wilde at the time of production. Wilde seemingly sent LaBeouf this message the night before he officially resigned from production: “Thanks for letting me in on your thought process. I know that isn’t fun. Doesn’t feel good to say no to someone, and I respect your honesty,” Wilde wrote. “I’m honored you were willing to go there with me, for me to tell a story with you. I’m gutted because it could have been something special. I want to make clear how much it means to me that you trust me. That’s a gift I’ll take with me.”

LaBeouf also circulated a video that Wilde sent him while driving a car, saying that LaBeouf’s threatened exit could be “a bit of a wake-up call for Miss Flo,” referencing lead star Florence Pugh.

“I feel like I’m not ready to give up on this yet, and I too am heartbroken, and I want to figure this out,” Wilde says in the video. “You know, I think this might be a bit of a wake-up call for Miss Flo, and I want to know if you’re open to giving this a shot with me, with us. If she really commits, if she really puts her mind and heart into it at this point and if you guys can make peace — and I respect your point of view, I respect hers — but if you guys can do it, what do you think? Is there hope? Will you let me know?”

In another text message sent between August 16 and August 20, 2020, Wilde texted LaBeouf, “You don’t have to be in my movies but don’t ever doubt me. We pinky promised. That means something in my house.”

Wilde recently told Variety that she is still “such an admirer” of LaBeouf’s work but “his process was not conducive to the ethos that I demand in my productions. He has a process that, in some ways, seems to require a combative energy, and I don’t personally believe that is conducive to the best performances.”

Wilde continued, “A lot came to light after this happened that really troubled me, in terms of his behavior. For our film, what we really needed was an energy that was incredibly supportive. Particularly with a movie like this, I knew that I was going to be asking Florence to be in very vulnerable situations, and my priority was making her feel safe and making her feel supported.”

She concluded, “I believe that creating a safe, trusting environment is the best way to get people to do their best work. Ultimately, my responsibility is to the production and to the cast to protect them. That was my job.”

Read LaBeouf’s full email to Wilde sent August 24 after her comments to Variety:

Olivia,

I hope this finds you inspired, purposeful, fulfilled & well. I pray every night that you & your family have health, happiness, & everything God would give me. No joke, every night before I sleep.

I have a little girl, Isabel; she is five months old and just beginning to develop the last half of her laugh; it’s AMAZING. Mia, my wife & I have found each other again & are journeying toward a healthy family with love and mutual respect.

I have embarked on a journey that feels redemptive & righteous (dirty word but fitting). I write to you now with 627 days of sobriety and a moral compass that never existed before my great humbling that was the last year and a quarter of my life. I reached out to you a few months ago to make amends; & I still pray one day, you can find space in your heart to forgive me for the failed collaboration we shared.

What inspired this email today is your latest Variety story. I am greatly honored by your words on my work; thank you, that felt good to read. I am a little confused about the narrative that I was fired, however. You and I both know the reasons for my exit. I quit your film because your actors & I couldn’t find time to rehearse. I have included as a reminder the screenshots of our text exchange on that day, and my text to Tobey.

I know that you are beginning your press run for DWD and that the news of my firing is attractive clickbait, as I am still persona-non-grata and may remain as such for the rest of my life. But, speaking of my daughter, I often think about the news articles she will read when she is literate. And though I owe, and will owe for the rest of my life, I only owe for my actions.

My failings with Twigs are fundamental and real, but they are not the narrative that has been presented. There is a time and a place to deal with such things, and I am trying to navigate a nuanced situation with respect for her and the truth, hence my silence. But this situation with your film and my “firing” will never have a court date with which to deal with the facts. If lies are repeated enough in the public they become truth. And so, it makes it that much harder for me to crawl out of the hole I have dug with my behaviors, to be able to provide for my family.

Firing me never took place, Olivia. And while I fully understand the attractiveness of pushing that story because of the current social landscape, the social currency that brings. It is not the truth. So I am humbly asking, as a person with an eye toward making things right, that you correct the narrative as best you can. I hope none of this negativly effects you, and that your film is succesful in all the ways you want it to be.

Every Blessing To You,

Shia

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Doggie dementia risk rises each year after age 10, study finds. Here’s what to look for

It’s an unfortunate reality many dog owners might have to face, especially if their dog’s breed lives 10 years or more. A new study that is part of the Dog Aging Project found the risk of developing cognitive issues rises by 52% each year after age 10 in many dogs.

But there’s no reason to despair if your furry best friend is showing signs of canine cognitive decline, or CCD, said veterinarian Dr. Dana Varble, chief veterinary officer for the North American Veterinary Community.

“Too often, pet owners think their dogs are just ‘slowing down’ and don’t realize there are things they can do to ease, slow or even stave off cognitive decline as dogs age,” Varble said.

“Studies show that mental activity and exercise are important for a dog’s mental well-being just as it is in humans. Stimulating the brain is important and this can be done easily with food puzzles for example,” she said.

Food puzzles are toys in which owners hide treats, and it’s up to the dog to push, jiggle or jog the treats out of them. Such activities help keep both dogs’ and cats’ brains engaged, experts say.

In addition, “nutritional supplements have been shown to improve signs and slow the decline of CCD. There are also special foods for aging dogs,” Varble said.

Age and activity levels are key

In the new study, published Thursday in the journal Scientific Reports, researchers asked over 15,000 dog owners to complete two surveys between December 2019 and 2020 on their dogs’ health and cognitive status. Then the scientists grouped the dogs by age and analyzed the results

Based on age alone, a dog’s odds of developing CCD increased by 68% for each year after a decade of life. But when other factors were taken into account, such as the breed of dog, existing health problems, sterilization and physical activity, the risk fell to 52% per extra year of life.

Inactive dogs of the same breed, health status, age and sterilization status were nearly seven times more likely to get doggie dementia than comparable active dogs. Whether it’s the inactivity that leads to the dementia or vice versa is unclear, the study authors said.

In addition, dogs with a history of neurological, eye or ear disorders had a higher risk of cognitive decline, according to the study.

There was good news as well: The study found almost no cognitive decline in dogs below the age of 10.

What to look for

Veterinarians have been studying the signs and symptoms of doggie dementia for years, trying to better understand and help the pets in their care. Here is what to look for, according to experts:

Disorientation: Dogs with cognitive issues can begin to have trouble getting around the house or start wandering around as if lost. They can get stuck behind furniture and not know how to get out or stare without a purpose at the floor, walls or out into space. They may even fail to recognize family members.

Changes in sleep cycles: Dementia can cause dogs to confuse day and night, and your pet could wake during the night and begin pacing the house, barking or whining. The sleeplessness at night may lead to excessive sleeping during the day.

House training: Some dogs forget years of house training and begin relieving themselves inside, which can make them anxious. They may forget to alert you when they need to go out, or even forget to do their business while outside and soil the home when they return.

Changes in social behavior: Interactions with you and other people in their lives can change. A dog could become extra clingy, fearful or needy. Or the dog might become antisocial, withdrawing from interactions and spending time alone.

Changes in physical activity: A dog with cognitive decline may lose interest in favorite toys, other dogs and people or start pacing aimlessly with no ability to settle down.

Take your dog to the vet if you see any of these signs, and the sooner the better, Varble suggested. “Early intervention can extend and improve the quality of life for our pets,” she said.

First, the vet will check the dog for other causes of the symptoms, eliminating such things as diabetes, loss of vision and hearing, kidney or urinary issues, arthritis, hypertension, and Cushing’s disease, caused by an excess of the stress hormone cortisol.
If you and your vet catch the signs of dementia early, the doctor may suggest a behavior-altering drug approved for dogs by the US Food and Drug Administration which works on the neurotransmitter dopamine to help the decline.

The vet may also put your dog on a brain-healthy diet and encourage more physical activity, socialization and brain-stimulation via food puzzles, teaching new tricks and encouraging snuffles and sniffs on walks.

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US and China reach landmark audit inspection deal

Washington and Beijing have reached a landmark agreement that would allow US regulators access to audits of Chinese companies that are listed on American exchanges, in a deal that would halt the threatened delisting of about 200 stocks that trade on Wall Street.

The announcement by US and Chinese regulators is a breakthrough in a long-standing impasse. Beijing has not allowed foreign regulators to inspect Chinese company audits, citing a desire to protect state secrets. The US has said it will force New York-listed Chinese companies worth more than $1tn if they do not comply with US audit rules.

The Public Company Accounting Oversight Board, the US auditor watchdog, said on Friday it would have the power to select the companies, audit engagements and potential violations it inspects and investigates, without consulting Chinese authorities.

Under the deal signed by the PCAOB, the China Securities Regulatory Commission (CSRC) and China’s finance ministry, PCAOB inspectors could be on the ground in Hong Kong by mid-September to begin inspections, the agency said.

Despite the agreement, US regulators were cautious about the success of the deal.

“Make no mistake, though: The proof will be in the pudding,” said Gary Gensler, chair of the US Securities and Exchange Commission, in a statement. “This agreement will be meaningful only if the PCAOB actually can inspect and investigate completely audit firms in China.

“If it cannot, roughly 200 China-based issuers will face prohibitions on trading of their securities in the US if they continue to use those audit firms,” he added.

The CSRC said the agreement “establishes a co-operation framework in line with the authorities’ respective laws” and “is an important step forward by regulators in China and the US towards resolving the audit oversight issue that concern mutual interests”.

The agreement will involve Big Four audit firms’ working files that are prepared in mainland China being inspected by PCAOB officials in Hong Kong, according to people with knowledge of the details. Several people close to the matter cautioned that the pilot would have to go smoothly in order for the PCAOB to accept that China was compliant with US audit disclosure rules.

One of the people familiar with the matter — a senior banker close to a number of Chinese American depositary receipts (ADRs) — said an agreement to carry out a test case had been reached before House Speaker Nancy Pelosi visited Taiwan, but the announcement was delayed because of heightened nationalist sentiment in China around the visit.

The CSRC met the Big Four firms in Beijing on Thursday to discuss the potential compromise with PCAOB audit requirements, a second person close to the matter, a portfolio manager at a global asset manager, said.

JPMorgan Chase held a call with clients in Asia and Hong Kong on Tuesday to discuss the status of the audit negotiations, according to a person who attended the call. One person on the call said that Liu He, China’s vice-premier, had drafted a consultation paper that would enable the PCAOB complete access to Chinese audit files, and that it had been communicated to US and Chinese regulators.

A senior financier in Hong Kong who is close to a number of Chinese tech groups said the solution had been “held up by liability questions from auditors” in recent weeks, driven by concerns about an increase in shareholder lawsuits against accounting firms in the US.

Since PCAOB’s creation in 2002 following the corporate accounting scandals at Enron and WorldCom, more than 50 jurisdictions have complied with its requirements to inspect and investigate audit firms of US-listed companies. But China and Hong Kong have not complied.

In 2020, Congress passed legislation that would subject Chinese and Hong Kong companies to delisting if the PCAOB could not review their audits. Companies could be banned from the US by 2024 if an auditing deal was not reached.

The law “was a game changer”, said Paul Leder, a former head of the international affairs office at the SEC, which oversees the PCAOB. “Without the threat of delistings, the Chinese authorities would never have agreed to the unfettered access described by the PCAOB.”

Gensler said that the agreement “marks the first time we have received such detailed and specific commitments from China that they would allow PCAOB inspections”.

“The Chinese and [US] jointly agreed on the need for a framework,” he added. “We were not willing to have PCAOB inspectors travel to China and Hong Kong unless there was an agreement on such a framework.”

Additional reporting by Cheng Leng in Hong Kong and Adam Samson in London

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Extended tests with levitated force sensor fail to find evidence of fifth force

Nature Physics (2022). DOI: 10.1038/s41567-022-01706-9″ width=”800″ height=”530″/>
Schematic of experiment. a, The ‘fifth force’ of the chameleon field is generated by eight thin films (source masses) of polyimide with thickness of 75 μm, spaced equally on a rotating plate. The force sensor consists of a piece of pyrolytic graphite, diamagnetically levitated in a magneto-gravitational trap and a 12.5-μm-thick film (test mass) of the same material as the source masses at the top supported by a glass rod. The magneto-gravitational trap is placed in a vacuum chamber with seismic noise isolation. The distance between the test mass and the source masses is 390 μm. The rotation of the source masses and the motion of the force sensor are monitored by optical systems, with the optical signals being detected by photodiode 1 and photodiode 2, respectively. The inset shows a schematic of the detection of the displacement of the force sensor. b, The rotating source masses generate a periodic ‘fifth force’ Fcham acting on the test mass. A thin electrical shielding window with thickness of 0.5 μm and a magnetic shield are used to screen the background electrostatic and magnetic forces. c, The field ϕ along the central z axis at two different rotation phases. The red and blue curves indicate the cases with and without a film of source mass above the test mass, respectively. The schematic is not to scale but for visibility. Credit: Nature Physics (2022). DOI: 10.1038/s41567-022-01706-9

A team of researchers from Nanjing University, working with two colleagues from the University of Science and Technology of China, has conducted new tests of the chameleon theory and report a failure to find any evidence of a fifth force. They have published their paper in the journal Nature Physics.

Prior research has suggested that there is a mysterious force acting on the universe—dubbed by theoretical physicists as dark energy, it was theorized as a way to explain why the universe is expanding at an accelerating rate. Despite much effort, no one has been able to prove that dark energy exists. One theory called the chameleon theory suggests that objects affected by gravity can behave in ways that fluctuate based on factors in their environment. The theory includes the idea of a chameleon field as a fifth force. The theory has been hotly debated because it directly contradicts the theory of general relativity, which states that gravitational forces are expected to be constant.

In this new effort, the researchers sought either to prove or disprove the theory using a levitated force sensor—a wheel-shaped device with plastic fins attached to it that spins past a thin film sitting atop a magnetically levitated piece of graphite. The base below the graphite is held up with springs. The goal is to test the idea that gravity exerts differing amounts of force depending on the density of objects in its vicinity. In a large context, the chameleon field would exert less force in a dense environment such as on an individual planet than it would over a large, less dense swath of space. If a fifth force exists, then the spinning films should exert a periodic force on the levitating film.

After running the experiment multiple times, the researchers failed to find any evidence of the spinning fins impacting the levitated film, which, they contend, rules out the chameleon theory as an explanatory candidate for dark energy. They also suggest their methodology highlights the need for robust, lab-based testing as a means of verifying or discrediting theoretical research. They suggest their methodology could also be used in other endeavors.


Predicting how soon the universe could collapse if dark energy has quintessence


More information:
Peiran Yin et al, Experiments with levitated force sensor challenge theories of dark energy, Nature Physics (2022). DOI: 10.1038/s41567-022-01706-9

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How President Biden decided to go big on student loan forgiveness

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President Biden had doubts. In private conversations with White House staffers and allies in Congress this spring, he said he worried that voters who’d never gone to college could resent a move to cancel huge amounts of student debt, according to four Democratic officials who spoke on the condition of anonymity to reflect private talks. Biden also said that the federal government should not be bailing out Ivy League graduates, and that his children should not qualify for help, two of the officials said.

“He was nervous about how it would play with working-class people,” one senior Democrat said, recalling the president’s comments at a meeting this spring.

But a relentless campaign was pressing Biden to embrace dramatic action: There were private appeals aboard Air Force One, the courting of first lady Jill Biden, months of political and economic arguments from senior White House staffers, and warnings by Black lawmakers about the dangers of doing too little. In the end, Biden came around. He didn’t just wipe out up to $20,000 in debt for most borrowers, an amount many activists had thought unlikely. He also defended the notion with passion from the bully pulpit Wednesday.

After six repayment extensions, pressure from Congress and activists, the White House acts on federal student loans. (Video: Michael Cadenhead/The Washington Post)

The result is one of the most significant changes to American higher education policy in decades — and a new cornerstone of the president’s economic legacy. Biden’s decision will dramatically change the financial circumstances of tens of millions of Americans, fully erasing the student loans of roughly 20 million people. Its political wisdom will immediately be put to the test, with Republicans seizing on it as a key part of their 2022 midterm campaign message.

Who qualifies for Biden’s plan to cancel $10,000 in student debt?

Despite campaigning on student debt forgiveness, Biden wrestled for months with the correct course of action. The president overcame unease with a policy criticized as enriching more affluent Americans in part because of data presented by White House staffers showing that beneficiaries would be in the working and middle classes. The proposal was not only contentious with influential Democratic economists like former treasury secretary Larry Summers. It was also greeted initially with skepticism from by Susan Rice, director of the White House Domestic Policy Council, although she later came to support it, according to three people familiar with the internal debates.

In a statement, White House Chief of Staff Ron Klain said Rice and Biden always supported taking significant action on student debt. But the scope of that policy remained in flux for most of the past year. Biden aides contemplated narrower policies that would exclude graduate students, extend forgiveness only to those who had attended public universities and limit forgiveness to those earning less than six figures. For weeks, the leading proposal would have canceled at most $10,000 per student.

Ultimately, however, Biden rejected those potential restrictions as too modest for the scale of America’s debt burden. He opted for something significantly more expansive, backing a private White House memo prepared for him in July and breaking with some allies from his centrist Senate career who were quick to distance themselves from the policy. The choice reflects in part Biden’s role as a coalitional politician: He became convinced that aggressive student debt relief would give Democrats a better chance of holding Congress in the fall through a badly needed boost from young voters and people of color. White House aides also privately marshaled evidence to show that the more targeted plan wouldn’t do much to erase racial disparities.

This story of how Biden came to embrace sweeping debt cancellation is based on more than two dozen interviews with White House officials, congressional lawmakers, Democratic pollsters, outside economic advisers and student debt activists, many of whom spoke on the condition of anonymity to describe private talks.

“This was the issue that split the economic establishment in the Democratic Party, inside and outside the government,” said Michael Pierce, who served as a deputy assistant director of the Consumer Financial Protection Bureau during the Obama administration and is now at the Student Borrower Protection Center, which has advocated for debt cancellation. “But the president decided to go big.”

Calculate how much of your student loan debt can be forgiven

Warren’s allies reshape the Democratic Party

Biden was a late convert to the cause of student debt relief. The idea first emerged out of Occupy Wall Street and the left fringe following the 2008 financial crisis. For years, only a handful of lawmakers backed the concept. Democrats broadly agreed on the need to rein in college tuition, and the Obama administration backed various proposals — such as expanding Pell Grants, a form of federal financial aid mostly used by low-income students — aimed at lowering the price of higher education. But retroactive forgiveness of extant student debt was anathema in mainstream Democratic policy circles, where the party’s economists viewed it as a radical step with little precedent.

That began to change because of the work of a group of activists — many of whom were heavily indebted — backed by Sen. Elizabeth Warren (D-Mass.). Supporters of a “debt jubilee” argued that reforming tuition would do little for the graduates already saddled with mountains of debt and afflicted by a job market that was weak for years after the recession. Seeking to harness that frustration, Warren and Sen. Bernie Sanders (I-Vt.) unveiled aggressive student debt cancellation planks in their 2020 presidential campaigns.

Aiming to unify the Democratic Party after the bruising 2020 primary, Biden endorsed the cancellation of at least $10,000 in debt per borrower after he won the nomination. When he took office, Warren allies secured key administration posts in economic and education policy: Julie Morgan, a Warren aide who developed the legal rationale for debt relief, became a deputy undersecretary at the Education Department. Richard Cordray, a former Warren adviser at the Consumer Financial Protection Bureau, was appointed the chief operating officer in the Office of Federal Student Aid. Bharat Ramamurti, Warren’s 2020 head of economic policy, joined the White House National Economic Council as deputy director.

Ramamurti in particular would later prove crucial in persuading Biden to get behind debt cancellation amid skepticism from other parts of the administration, as part of a team led with Rice and other senior White House officials Carmel Martin and Brian Deese.

“Working with the Biden transition to get key people throughout the White House and in places like the Department of Education set the stage for many allies to be in the room as this was being discussed,” said Adam Green, a Warren ally.

Who has student loan debt in America?

But these forces did not stand unopposed. Democrats’ thin Senate majority made it impossible to pass $10,000 in debt forgiveness through Congress. For more than a year, high inflation has curbed the president’s approval, and critics argued that hundreds of billions in debt forgiveness could lead beneficiaries to spend more money, further lifting prices. Negotiations with Sen. Joe Manchin III (D-W.Va.) over the party’s domestic policy agenda proved to be another hurdle, with senior Democrats wary throughout the summer of upsetting the lawmaker. Democratic pollsters presented the administration with evidence from focus groups that suggested voters who had paid off their loans would be upset by significant loan forgiveness.

Publicly, Biden himself held to the $10,000 line. “I’m prepared to write off a $10,000 debt, but not 50,” he said, later adding: “My daughter went to Tulane University and then got a masters at Penn. She graduated $103,000 in debt … I don’t think anybody should have to pay for that.”

The concerns were not only political. Career staffers at the Education Department thought they were being asked to take on too much at once and would struggle to accomplish it all. Centrist Democrats worried the plan would be too generous to Americans not in need of help. As rumors swirled of potential debt cancellation, Sen. Michael F. Bennet (D-Colo.) argued on the Senate floor that relief should be targeted more directly to the lowest earners. Bennet later told senior White House officials that loan relief could do too much to help affluent Americans, one person familiar with the matter said. Bennet aired similar criticisms publicly on Wednesday after the White House released its plan.

Biden also faced blowback from prominent Democratic economists — particularly Summers — who had defended the president’s “Build Back Better” agenda after initially criticizing the White House’s pandemic relief plan last year for its $1.9 trillion price tag. Biden has frequently emphasized that the Inflation Reduction Act would reduce the federal deficit, but projections from budget analysts showed student debt relief would erase some of those fiscal gains.

“During BBB, there were a lot of policies people on the center left knew were irresponsible but did not want to criticize because they wanted to be team players,” said Ben Ritz, director of the Center for Funding America’s Future at the Progressive Policy Institute, alluding to complaints about expensive and controversial proposals. Now, he said, opponents are unwilling to be silent about their objections to Biden’s student loan plans. “The centrist Democrats are largely in alignment that this was a mistake.”

These warnings appeared to limit the ambition of the White House’s loan forgiveness plan. But that was before a crucial meeting with Black lawmakers this summer.

Black leaders push Biden, who changes course

Shortly after The Washington Post reported in May that the White House might cancel $10,000 in student debt per borrower, a group of Black House Democrats met privately over Zoom with senior White House economic officials.

Rice, director of the Domestic Policy Council, and Deese, head of the White House National Economic Council, listened as members of the Congressional Black Caucus argued that the measure was insufficient. Led by Rep. Joyce Beatty (D-Ohio), the caucus chair, the lawmakers said Biden needed to help people of color, who helped elect him. The White House had already suffered defeats on voting rights and more funding for historically black colleges and universities, key priorities for Black lawmakers. House Majority Whip James E. Clyburn (D-S.C.), a key Biden ally, was among the Black lawmakers calling for canceling up to $50,000 in student debt per borrower.

The legislators made clear they wouldn’t give Biden political cover if he wiped out only $10,000 per borrower. The NAACP made an even stronger statement. Its president, Derrick Johnson, said $10,000 in forgiveness amounted to “pouring a bucket of ice water on a forest fire.”

“We’ve been building this coalition and movement for the last two years, pushing President Biden to be responsive to the movement that elected him,” said Rep. Ayanna Pressley (D-Mass.), who attended that meeting, held the week of May 30, along with Democratic Reps. Robert C. “Bobby” Scott (Va.) and Maxine Waters (Calif.).

Top Democratic lawmakers also lobbied Biden personally at every turn. On May 17, as they flew back to Washington from the funeral for the victims of the Buffalo supermarket massacre, Senate Majority Leader Charles E. Schumer (D-N.Y.) told Biden that student debt cancellation was the right move politically and morally. On a separate ride aboard Air Force One in July, Warren also pressed Biden to be aggressive. Some House Democrats, meanwhile, worked to reassure Jill Biden, a community college English teacher, that student debt cancellation would not imperil the president’s push for making community college free, a top priority of the first lady.

Within the White House, economic officials had begun arguing that Biden could address the Black Caucus’s concerns by doubling the amount of forgiveness for recipients of Pell Grants. Biden aides produced evidence that canceling only $10,000 per borrower would do little to close the racial wealth gap. And while the Supreme Court might strike down a measure that targeted the loans held by Black Americans, some advocates argued Pell Grants were a reasonably good way to reach borrowers of color. (The Education Department released a legal opinion Wednesday saying it has the legal authority to cancel student debt.)

“Given how concentrated Black families are at the lower end of the income or wealth distribution, we are more likely to be the recipients of a policy, like Pell, that serves low-income or wealth-poor households,” said Fenaba R. Addo, an associate professor of public policy at the University of North Carolina at Chapel Hill.

What the student loan payment pause has meant to Black women

A disproportionate number of Pell Grant recipients attend minority-serving and historically Black institutions, many of which lack the financial resources to provide generous aid, leaving students to borrow at high rates to cover the cost, said Addo, co-author of the forthcoming “A Dream Defaulted: The Student Loan Crisis Among Black Borrowers.” Those same schools had hoped to benefit from provisions in Build Back Better to lower the cost of attendance and invest in their ailing facilities. While the cancellation plan is no substitute, it could capture a significant number of their current and former students.

Political experts also presented senior White House officials with polling showing both that a majority of Americans support limited debt forgiveness and that such a move could help Democrats with young voters in November. Sen. Raphael G. Warnock (D-Ga.), facing a tough reelection bid this fall, also pressed the political upside of an expansive effort.

“This is a motivator for young people, which is important in terms of the election, though that’s not why he did it,” said John Anzalone, Biden’s pollster. “It’s a huge issue for young people — the support levels for them are in the high 60s.”

Under this mounting pressure, the more modest proposals gave way. In July, senior White House officials sent a memo to the president that recommended the plan to cancel up to $20,000 for Pell Grant recipients and $10,000 for other borrowers. Graduate students and attendees of private colleges were included.

Republicans have fiercely denounced the cancellation policy as a giveaway to rich college graduates and an insult to Americans who saved to pay back their loans, citing the criticisms of Democratic economists like Summers and former Obama aide Jason Furman.

“My advice is going to be to simply call it an effort to buy votes,” said former House speaker Newt Gingrich, who helped engineer the GOP’s congressional takeover in 1994. “You have to ask yourself: What are these people thinking?”

Biden, however, demonstrated Wednesday that he is willing to defend his new policy push with visceral emotion. “The outrage over helping working people with student loans,” Biden said, “I think is just simply wrong.”

Marianna Sotomayor contributed to this report.



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How US government diet guidelines ignore the climate crisis | Environment

To keep the climate habitable, most scientists agree that switching to renewable energy alone isn’t enough – Americans also need to change the way they eat. Environmental and public health advocates are pushing a new strategy to help get there: including climate breakdown in the official US dietary guidelines, which shape what goes into billions of meals eaten across the country every year.

Every five years, the Department of Agriculture and the Department of Health and Human Services jointly publish a new version of the guidelines. They form the basis for the public-facing eating guide MyPlate, formerly MyPyramid, as well as many government-backed meal programs, such as National School Lunch. Historically, these guidelines have narrowly focused on human nutrition, but some are now saying they should be expanded to incorporate climate considerations as well.

The current, 150-page edition for 2020-2025 doesn’t mention food’s role in the climate crisis at all. Climate groups say this is an abdication of responsibility, with Americans feeling the effects of a warming planet more than ever. The recently passed Inflation Reduction Act, the most significant climate legislation in US history, does very little to address the food system.

“Climate change poses a multitude of threats to human health and nutrition security. We cannot extricate these things from each other,” said Jessi Silverman, a senior policy associate for the Center for Science in the Public Interest. Her group and 39 others, including the Union of Concerned Scientists and the American Academy of Pediatrics, in May wrote a letter urging the government to include sustainability in the 2025-2030 dietary guidelines, which are now in development.

A sustainability component would encourage Americans to eat less meat and dairy, which have a significantly higher climate impact than nutritionally comparable plant-based foods. “It would be virtually impossible to even meet the two-degree [Celsius] limit in global temperature change without incorporating substantial reductions in beef intake,” said Mark Rifkin, senior food and agriculture policy specialist for the Center for Biological Diversity, another signatory to the letter.

A table showing USDA and Health and Human Services food guidelines compared to Climate experts’ recommendations. When it comes to protein, experts recommend swapping animal-based proteins with plant-based ones. As well as switching a cup of milk to a glass of water.

The current guidelines advise Americans to eat far more animal products than is sustainable, said Walter Willett, a professor at Harvard’s School of Public Health. The primary dietary chart recommends 26 ounces of protein from meat, poultry and eggs a week, compared with just 5 ounces from plant-based foods, although there are alternative charts that show how vegetarians can get the same nutrients without meat. They also “still basically say three servings of dairy a day, which is actually really radical because our current consumption is 1.6 servings a day”, he said. “To just recommend three servings of dairy and say nothing about the environmental consequences if people really did that is just completely irresponsible.”

Because most Americans are deficient in fiber and fruits and vegetables, not animal products, Rifkin, a dietitian, said climate-focused guidance would line up with what the public needs nutritionally. It would also help address other problems that stem from the meat-heavy US food system, he said, including risk of future pandemics, food security and pollution from concentrated animal feeding operations, which disproportionately affects communities of color.

A proposed list of questions released in April for the scientific panel that advises the guidelines didn’t include sustainability. That worries advocates, but they say it’s still early. Janet de Jesus, HHS’s staff lead on the guidelines, said sustainability could still be included. “We’re not saying that it’s not going to be in the dietary guidelines – we’re not saying that at all,” de Jesus said. “It’s a high priority for HHS leadership to address climate change.”

Countries including Germany, Brazil, Sweden and Qatar have addressed sustainability in their dietary guidelines, according to a UN Food and Agriculture Organization report. Canada’s Food Guide advises choosing plant-based foods more often for the environment. Germany has cut its per-capita meat consumption by 12% since 2011, Vox reported last month, and its minister of food and agriculture has recently prioritized a shift toward more plant-based eating.

Advocates say a change in the US dietary guidelines could have a similar influence. “The guidelines are much more impactful than I think a lot of people realize,” Silverman said. Federal food aid programs have to comply with the guidelines, shaping how millions of people eat. The National School Lunch and National School Breakfast, for instance, served more than 7bn meals a year to tens of millions of children before the Covid-19 pandemic. The guidelines also influence cafeteria food served in government buildings, hospitals and other institutions, and are used in nutrition education programs.

National School Lunch’s reach makes it “uniquely positioned to affect the dietary patterns of American children and adolescents and could aid in addressing the environmental impacts of food systems”, according to a recent paper in Communications Earth & Environment. Meat contributes disproportionately to school meals’ impact on the climate, as well as land and water use.

Because government programs and other large institutions serve so many meals, sustainability advocates in recent years have focused on trying to influence their food buying decisions. California earlier this year allocated $100m to help schools serve more plant-based meals.

This isn’t the first time the environment has been at issue in the nation’s dietary guidelines. In 2015, the government-appointed panel of nutrition experts that advised the 2015-2020 guidelines addressed sustainability in its scientific report. “In general, a dietary pattern that is higher in plant-based foods, such as vegetables, fruits, whole grains, legumes, nuts, and seeds, and lower in animal-based foods is more health promoting and is associated with lesser environmental impact,” the panel wrote.

But after outcry from the meat industry and Republican lawmakers, the recommendation to eat more plants was dropped from the final guidelines. In an interview with the Wall Street Journal at the time, the USDA secretary, Tom Vilsack, said sustainability was outside the purview of the dietary guidelines and compared the scientific committee to his granddaughter who “colors outside of the lines”.

“It’s really condescending stuff,” said Bob Martin, of the Johns Hopkins Center for a Livable Future, about Vilsack’s comments. “The people involved in this were highly qualified.”

Agribusiness has a long history of influence over the dietary guidelines, and it will undoubtedly be a factor this time around, too. The meat and dairy industries spent $49.5m on political contributions in 2020, and another $15.9m lobbying the federal government.

Food industry groups also routinely report lobbying on federal nutrition policy. The National Cattlemen’s Beef Association between 2014 and 2016 spent more than $303,000 lobbying to keep beef in the dietary guidelines, according to federal lobbying records. Several industry groups, including the North American Meat Institute, the International Dairy Foods Association and the National Turkey Federation, have already weighed in on the process for the 2025-2030 guidance. “[W]hile an important topic, sustainability is outside the scope of the Dietary Guidelines,” the National Pork Producers Council wrote in a public comment in May.

Even though environmental advocates face an uphill battle, a lot has changed since the failed 2015 effort to incorporate sustainability, said Jessi Silverman of the Center for Science in the Public Interest. “I think the public pressure to have concrete policies to address climate change has grown a lot in the years since then.”

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