Day: March 27, 2023

The Webb Space Telescope has found no evidence of an atmosphere at one of the seven rocky, Earth-sized planets orbiting another star.

Scientists said Monday that doesn’t bode well for the rest of the planets in this solar system, some of which are in the sweet spot for harboring water and potentially life.

“This is not necessarily a bust” for the other planets, Massachusetts Institute of Technology astrophysicist Sara Seager, who wasn’t part of the study, said in an email. “But we will have to wait and see.”

The Trappist solar system — a rarity with seven planets about the size of our own — has enticed astronomers ever since they spotted it just 40 light-years away. That’s close by cosmic standards; a light-year is about 5.8 trillion miles. Three of the seven planets are in their star’s habitable zone, making this star system even more alluring.

The NASA-led team reported little if any atmosphere exists at the innermost planet. Results were published Monday in the journal Nature.

The lack of an atmosphere would mean no water and no protection from cosmic rays, said lead researcher Thomas Greene of NASA’s Ames Research Center.

As for the other planets orbiting the small, feeble Trappist star, “I would have been more optimistic about the others” having atmospheres if this one had, Greene said in an email.

If rocky planets orbiting ultracool red dwarf stars like this one “do turn out to be a bust, we will have to wait for Earths around sun-like stars, which could be a long wait,” said MIT’s Seager.

Because the Trappist system’s innermost planet is bombarded by solar radiation — four times as much as Earth gets from our sun — it’s possible that extra energy is why there’s no atmosphere, Greene noted. His team found temperatures there hitting 450 degrees Fahrenheit (230 degrees Celsius) on the side of the planet constantly facing its star.

By using Webb — the largest and most powerful telescope ever sent into space — the U.S. and French scientists were able to measure the change in brightness as the innermost planet moved behind its star and estimate how much infrared light was emitted from the planet.

The change in brightness was minuscule since the Trappist star is more than 1,000 times brighter than this planet, and so Webb’s detection of it “is itself a major milestone,” the European Space Agency said.

More observations are planned not only of this planet, but the others in the Trappist system. Looking at this particular planet in another wavelength could uncover an atmosphere much thinner than our own, although it seems unlikely it could survive, said Taylor Bell of the Bay Area Environmental Research Institute, who was part of the study.

Further research could still uncover an atmosphere of sorts, even if it’s not exactly like what’s seen on Earth, said Michael Gillon of the University of Liege in Belgium who was part of the team that discovered the first three Trappist planets in 2016. He did not take part in the latest study.

“With rocky exoplanets, we are in uncharted territory” since scientists’ understanding is based on the four rocky planets of our solar system, Gillon said in an email.

Launched in late 2021 to an observation post 1 million miles (1.6 million kilometers) away, Webb is considered the successor to the Hubble Space Telescope, orbiting Earth for more than three decades.

In the past, Hubble and the Spitzer Space Telescope scoured the Trappist system for atmospheres, but without definitive results.

“It is just the beginning, and what we can learn with the inner planets is going to be different from what we can learn from the other ones,” MIT’s Julien de Wit, who was not involved in the study, said in an email.
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Scientists have long known that wild seabirds ingest bits of plastic pollution as they feed, but a new study Monday shows the tiny particles don’t just clog or transit the stomach but can subvert its complex mix of good and bad bacteria, too.

Plastic-infested digestive tracts from two species of Atlantic seabirds, northern fulmars and Cory’s shearwaters, showed a decrease of mostly beneficial “indigenous” bacteria and more potentially harmful pathogens.

There was also an increase in antibiotic-resistant and plastic-degrading microbes, researchers reported in the journal Nature Ecology & Evolution.

The findings suggested that certain types of microplastic may be leeching chemicals that disrupt the birds’ so-called gut microbiome.

Microplastics — produced when plastic products break down in the environment — are directly and indirectly ingested across most animal food chains.

They can be found in every corner of the world, from the deepest trenches of oceans to the top of Mount Everest.

In humans, they have been detected in the blood, breast milk and placentas.

The new study supports previous findings that prolonged ingestion of microplastics causes an imbalance of healthy and unhealthy bacteria in the stomach, a condition known as gut dysbiosis.

The implications are far-reaching.

Like humans, birds have evolved with a vast network of microbes, including bacteria, that live in our bodies in communities called microbiomes.

Some microbes cause diseases, but most exist as “friendly” bacteria with a critical role in digestion, immune response and other critical functions.

“There’s a symbiosis that goes on — and that’s the case in the seabirds as well as in humans,” lead author Gloria Fackelmann of Ulm University in Germany told AFP.

Little is known about the effects of individual microbes on the body.

But overall, a growing body of research points to the harmful impacts of microplastics on animal health.

The tiny particles — less than 5 millimeters in diameter — can cause cell death and allergic reactions in humans.

Chemicals in microplastics have also been linked to increased risks of cancer, reproductive problems and DNA mutations.

The authors hope the findings in seabirds will spur related studies for humans.

“If this man-made substance could alter our microbiome, I think that should make people think,” said Fackelmann.
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William Shatner, Monica Lewinsky and other prolific Twitter commentators — some household names, others little-known journalists — could soon be losing the blue check marks that helped verify their identity on the social media platform. 

They could get the marks back by paying up to $11 a month. But some longtime users, including 92-year-old Star Trek legend Shatner, have balked at buying the premium service championed by Twitter’s billionaire owner and chief executive Elon Musk. 

After months of delay, Musk is gleefully promising that Saturday is the deadline for celebrities, journalists and others who’d been verified for free to pony up or lose their legacy status. 

“It will be glorious,” he tweeted Monday, in response to a Twitter user who noted that Saturday is also April Fools’ Day. 

After buying Twitter for $44 billion in October, Musk has been trying to boost the struggling platform’s revenue by pushing more people to pay for a premium subscription. But his move also reflects his assertion that the blue verification marks have become an undeserved or “corrupt” status symbol for elite personalities and news reporters. 

Along with verifying celebrities, one of Twitter’s main reasons to mark profiles with a free blue check mark starting about 14 years ago was to verify politicians, activists and people who suddenly find themselves in the news, as well as little-known journalists at small publications around the globe, as an extra tool to curb misinformation coming from accounts that are impersonating people. 

Lewinsky tweeted a screenshot Sunday of all the people impersonating her, including at least one who appears to have paid for a blue check mark. She asked, “what universe is this fair to people who can suffer consequences for being impersonated? a lie travels half way around the world before truth even gets out the door.” 

Shatner, known for his irreverent humor, also tagged Musk with a complaint about the promised changes. 

“I’ve been here for 15 years giving my (clock emoji) & witty thoughts all for bupkis,” he wrote. “Now you’re telling me that I have to pay for something you gave me for free?” 

Musk responded that there shouldn’t be a different standard for celebrities. “It’s more about treating everyone equally,” Musk tweeted. 

For now, those who still have the blue check but apparently haven’t paid the premium fee — a group that includes Beyoncé, Stephen King, Barack and Michelle Obama, Taylor Swift, Tucker Carlson, Drake and Musk himself — have messages appended to their profile saying it is a “legacy verified account. It may or may not be notable.” 

But while “the attention is reasonably on celebrities because of our culture,” the bigger concern for open government advocate Alex Howard, director of the Digital Democracy Project, is that impersonators could more easily spread rumors and conspiracies that could move markets or harm democracies around the world. 

“The reason verification exists on this platform was not simply to designate people as notable or authorities, but to prevent impersonation,” Howard said. 

One of Musk’s first product moves after taking over Twitter was to launch a service granting blue checks to anyone willing to pay $8 a month. But it was quickly inundated by imposter accounts, including those impersonating Nintendo, pharmaceutical company Eli Lilly and Musk’s businesses Tesla and SpaceX, so Twitter had to temporarily suspend the service days after its launch. 

The relaunched service costs $8 a month for web users and $11 a month for iPhone and iPad users. Subscribers are supposed to see fewer ads, be able to post longer videos and have their tweets featured more prominently. 
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Florida has captured more than 17,000 Burmese pythons since 2000, but tens of thousands more are likely roaming the Florida Everglades. That’s a concern because the reptiles, which are not native to the area, are gobbling up the competition.

“[Pythons] can take out one of our apex predators, which are alligators and crocodiles, and then it’ll take down some of the other native animals that are small mammals — some of the rats, the mice, the marsh bunnies — things that are supposed to be food for other things,” says Mike Hileman, park director of Gatorland, a theme park and wildlife preserve in Orlando. “So, they compete with our native animals, and because they’re a more dominant species, they win that battle.”

The Everglades is among the world’s most unique and delicate ecosystems. The python invasion is upsetting the fragile balance of the 6 million-square-kilometer wetlands preserve, which is home to rare and endangered species like manatees, the Florida panther and the American crocodile.

“Once a species starts reproducing in the wild, and they have a system that works for them, it’s almost next to impossible to eradicate them,” Hileman says.

Florida is grappling with the most severe invasive animal crisis in the continental United States. The invasives flourish in the state’s subtropical climate, characterized by hot, humid summers and wet, mild winters. There are more than 500 non-native plant and wildlife species in the state, some of which — like pythons — are taking over the habitat and threatening the environment.

“They form almost like a monoculture of the invasives, and when your biodiversity plummets, then the environment isn’t as able to withstand perturbations like climate change,” says Kurt Foote, a ranger with the National Park Service and natural resource management specialist at Fort Matanzas National Monument in St. Augustine. “Nature relies on variety, and when you don’t have variety, it’s just more susceptible to collapse.”

There is a flourishing reptile pet trade in Florida. In 1992, Hurricane Andrew destroyed a Burmese python breeding facility, releasing the animals into the wild. The Category 5 hurricane also leveled thousands of homes, setting numerous exotic pets free.

However, the very first Burmese python was found in the Everglades in 1979, more than a decade before Hurricane Andrew, and was probably a pet that escaped or was intentionally released by its owner. Florida residents are no longer allowed to keep Burmese pythons as pets.

“Animals can be a lot of work. The parrots are loud; they live almost 80 years. Tortoises can get really big and live 100 years. So, it’s a big commitment to have a lot of these animals,” says Kylie Reynolds, deputy director of Amazing Animals Inc., a nonprofit exotic animal preserve in St. Cloud that takes in non-native animals that were once people’s pets.

“People sometimes just go, ‘You know, it’s nice in Florida. We’ll just let it loose.’… Maybe they think their animal would be happier free. But again, they could compete for our natural resources with our native wildlife,” Reynolds says.

In addition to Burmese pythons, Florida’s most problematic invasive animals include lionfish, feral hogs, Argentine black and white tegu lizards, and Cuban tree frogs, which can be found in many parts of the state, including Fort Matanzas.

“They’re a bigger tree frog than what we have here by quite a bit, and they’re also fairly omnivorous, and they will eat the native tree frogs,” Foote says. “Like a lot of invasives, when they get here, they don’t have the things that predated them or competed with them in their homelands. They get here and without that pressure, they’re able to really breed and reproduce.”

Feral hogs, originally brought to Florida by Spanish explorers in the 1500s, cause millions of dollars’ worth of damage to crops each year. The animals, which are found statewide, disrupt the soil in areas such as Lake Apopka in Mount Dora that biologists are trying to restore.

“We’re planting native vegetation. … A lot of times, they’re rare or endemic species,” says Ben Gugliotti, land manager of Lake Apopka North Shore, a nature preserve. “The hogs will come in and root up those areas, basically destroying the planting areas that we’re trying to restore. And then also actually create a secondary opening for invasive plant species that move into those disturbed soil areas.”

Argentine black and white tegu lizards are on the mind of Cheryl Millett, manager of The Nature Conservancy’s Tiger Creek preserve in Babson Park, which sits on Florida’s oldest and highest land mass.

“It’s a biodiversity hotspot. And yeah, we have a lot of things that … don’t exist anywhere else,” Millett says. “And if we lost them here, we wouldn’t have them anymore on Earth.”

She’s most concerned about tegu lizards, which haven’t reached Tiger Creek yet but have been spotted nearby. They can grow up to 1.5 meters long.

“They found baby gopher tortoises in the guts of tegu lizards that have been found in South Florida,” Millett says. “They can eat baby gopher tortoises. I’m really worried about their potential impact here.”

Gopher tortoises are listed as federally endangered. They are a keystone species, which means they are critical to the surrounding ecosystem because they provide shelter for hundreds of other animals.

“[Tegu lizards] love gopher tortoise burrows, and they’ve been found using gopher tortoise burrows in South Florida,” Millett says. “Gopher tortoises create these burrows. They’re like 10 feet deep, and can be 30 feet long, and they harbor over 300 different species in them.”

Florida spends more than $500 million a year trying to contain invasive species and the damage they cause. Officials organize hunts, exotic pet amnesty programs, and utilize other methods to combat invasive species. But it might come down to educating the future.

“Our generation, we already have preconceived ideas. We’re lost. We’re not going to change anything,” says Hileman of Gatorland, who speaks to school groups about wildlife conservation. “We’ve got to get with the little guys, and we got to get them on the same team so they can spread that message to their kids as they get older.”
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Some parts of Twitter’s source code — the fundamental computer code on which the social network runs — were leaked online, the social media company said in a legal filing on Sunday that was first reported by The New York Times. 

According to the legal document, filed with the U.S. District Court of the Northern District of California, Twitter had asked GitHub, an internet hosting service for software development, to take down the code where it was posted. The platform complied and said the content had been disabled, according to the filing. Twitter also asked the court to identify the alleged infringer or infringers who posted Twitter’s source code on systems operated by GitHub without Twitter’s authorization. 

Twitter, based in San Francisco, noted in the filing that the postings infringe copyrights held by Twitter. 

The leak creates more challenges for billionaire Elon Musk, who bought Twitter last October for $44 billion and took the company private. Since then, it has been engulfed in chaos, with massive layoffs and advertisers fleeing. 

Meanwhile, the Federal Trade Commission is probing Musk’s mass layoffs at Twitter and trying to obtain his internal communications as part of ongoing oversight into the social media company’s privacy and cybersecurity practices, according to documents described in a congressional report. 
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