Alma finds evidence of oxygen in the majority of known galaxies

Astronomers using Atacama’s Large Millimeter/Sub-Millimeter Array (ALMA) detected oxygen in the most perilous confirmed galaxy ever discovered. This detection, made by two different teams, suggests that the galaxy is much more chemically mature than expected.

This is the impression of the artist Jades-GS-Z14-0. Image credit: ESO/M. Kornmesser.

Discovered in 2024, the Jades-GS-Z14-0 (GS-Z14 for short) is far apart, and its light took 13.4 billion years to reach us. This means that the universe was under 300 million years old, about 2% of its current age.

“It’s like finding adolescence you only expect from a baby,” said PhD Thunder Shues. Leiden Observatory Candidate and First Author of a paper Accepted for publication in Astrophysical Journal.

“The results show that galaxies are forming very rapidly, mature rapidly, and there is growing evidence that galaxies form much faster than expected.”

Galaxies usually begin life filled with young stars. This is mainly made of light elements such as hydrogen and helium.

As the stars evolve, they create heavier elements like oxygen, which will disperse into the host galaxy after exploding in supernova events.

Researchers thought 300 million years ago that the universe was too young to ripen galaxies with heavy elements.

However, two ALMA studies show that GS-Z14 has about 10 times more heavy elements than expected.

The inset of this image shows Jades-GS-Z14-0 seen in Alma. The two spectra arise from independent analysis of ALMA data by two teams of astronomers. Both discover oxygen radiation, making the universe the most distant detection of oxygen just 300 million years ago. Image credits: alma/eso/naoj/nrao/carniani et al. /schouws et al. /NASA/ESA/CSA/WEBB/STSCI/BRANT ROBERTSON… etc.

“They opened up a new perspective on the first stages of Galaxy’s evolution and were surprised by the unexpected results,” said Dr. Stefano Carniani, an astronomer at the Scola Normal Superore in Pisa and lead author. paper Published in the journal Astronomy and Astrophysics.

“Evidence that galaxies are already matured in the infantile universe raises questions about when and how they formed.”

Oxygen detection allowed astronomers to make distance measurements on the GS-Z14 more accurate.

“ALMA detection measures galaxy distances very accurately to just 0.005% uncertainty,” says PhD Eleonora Parlanti. A student at the Scola Normal Supers in Pisa.

“This level of accuracy is similar to being accurate within 5 cm at a distance of 1 km, but it helps to improve our understanding of distant galactic properties.”

“The galaxy was originally discovered by NASA/ESA/CSA James Webb’s space telescope, but Alma took it to see and accurately determine its huge distance,” said Dr. Leichard Boowens, an astronomer at the Leiden Observatory.

“This shows an incredible synergy between Alma and Webb, revealing the formation and evolution of the first galaxy.”

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Thunder Shues et al. 2025. Detecting [OIII]88μm with Jades-GS-Z14-0 at Z = 14.1793. APJin press; Arxiv: 2409.20549

Stefano Carniani et al. 2025. The eventful life of a bright galaxy at Z = 14: metal enrichment, feedback, and low-gas fractions? A&Ain press; doi: 10.1051/0004-6361/202452451

Source: www.sci.news

Study suggests that the majority of Earth’s meteorites come from the breakup events of only a few asteroids

A new study shows that about 70% of meteorites originate from at least three recent breakups of giant asteroids.

This is the artist's impression of the asteroid as it breaks apart. Credit: NASA/JPL-California Institute of Technology.

A type of meteorite, commonly called a chondrite, accounts for about 80% of all meteorites that hit Earth, including those that were involved in the violent impact period about 466 million years ago that is thought to have started the Ice Age. Included.

Previous studies have demonstrated that approximately 70% of meteorites on Earth have compositions known as H and L chondrites.

Argon-argon dating of L-chondrite meteorites on Earth suggests that these samples may have originated from the catastrophic destruction of a single asteroid that experienced a supersonic impact approximately 470 million years ago. It turned out to be high.

in new researchESO and MIT researcher Dr. Michael Marcet and colleagues have compiled spectroscopic data from asteroids in the main belt between Mars and Jupiter.

They found that a group of asteroids known as the Massalia family is very similar in composition to L-chondrite meteorites on Earth.

Through computer modeling, they propose that an impact event about 450 million years ago destroyed an L-chondrite asteroid, forming the Massalia family and providing debris that fueled the influx of meteorites.

in second studyCharles University researcher Miroslav Broz and his colleagues found that the current influx of H and L chondrite meteorites was likely caused by three recent breakups.

These events occurred about 5.8, 7.6 and 40 million years ago and involved the destruction of asteroids over 30 km (18.6 miles) in diameter.

More specifically, they suggest that the impact formation of the relatively young Karin and Coronis asteroid families and a second impact event (about 40 million years ago) in the older Massalia asteroids are currently falling to Earth. I guessed that explained most of the meteorites.

in Third, follow-upDr. Brož and his co-authors extended their approach to the entire meteorite family, revealing the major origins of carbonaceous chondrites and achondrites, in addition to those from the Moon, Mars, and Vesta.

“Our discovery provides insight into the mystery of where the most common meteorites that have ever hit Earth came from and how those impacts shaped Earth's history.” ,” the researchers said.

The results are published in three papers. journal nature and journal astronomy and astrophysics.

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M. Marcet others. 2024. Massalia asteroid family as the origin of ordinary L chondrites. nature 634, 561-565; doi: 10.1038/s41586-024-08007-6

M. Broz others. 2024. Young asteroids as the main source of meteorites. nature 634, 566-571; doi: 10.1038/s41586-024-08006-7

M. Broz others. 2024. Source region of carbonaceous meteorites and near-Earth objects. A&A 689, A183; doi: 10.1051/0004-6361/202450532

Source: www.sci.news

After Hurricane Hits, Majority of Coastal Town’s Residents Abandon Rebuilding Efforts

According to NASA’s estimates, Louisiana has lost about 750 square miles of coastal wetlands since 1984. Check out the report for more details. In a recent paper published in February, researchers have predicted that three-quarters of Louisiana’s wetlands could be submerged by 2070.

In various coastal cities across the United States, the land is gradually sinking due to fossil fuel and water extraction, exacerbating sea level rise. By 2050, the sinking phenomenon could potentially put over half a million more people at risk of severe flooding.

Raising resilient children

Anna Dupont, 21, is one of the few young residents left in Cameron Parish. She cherishes her parents’ stories about the vibrant community of Cameron.

Anna Dupont, 21, is one of the few young people left in Cameron after a series of devastating hurricanes.
Michael Gemelli/NBC News

Before Hurricane Rita, Cameron Parish was a thriving, close-knit community that enjoyed festivities like crawfish boils and barbecues, with residents being proud supporters of the high school football team.

Dupont recalls nostalgic memories of fishing and birdwatching in the expansive wetlands surrounding her former home. She laments the loss of her favorite hangout spot, T-Boy’s Cajun Grill, which now stands as an empty lot.

Cameron is considered ground zero for climate change by Dupont, who witnessed her home being destroyed twice by storms before she even graduated from high school. Hurricane Laura’s impact forced her and her family to evacuate, leading to a sense of loss and emptiness upon their return.

Despite a joyful upbringing, Dupont saw her peers struggle with disrupted childhoods due to unstable living conditions post-hurricanes, leading to mental health challenges and substance abuse in some cases.

While many residents departed Cameron Parish after Hurricane Rita in 2005, others chose to remain resilient despite subsequent natural calamities. However, the proposed expansion of Venture Global LNG’s CP2 LNG terminal construction has stirred concern among the remaining residents.

Source: www.nbcnews.com

Research shows that the majority of Unidentified Aerial Phenomenon (UAP) sightings occur in the western United States.

Sightings of unidentified anomalous phenomena (UAPs), formerly known as unidentified flying objects (UFOs), have been reported throughout history. There is growing interest in understanding what these sighting reports mean, given the potential security and safety risks they pose, as well as scientific curiosity. Scientists at the University of Utah and the U.S. Department of Defense see this problem as a key question of human experience and can be examined through a geographic lens: what local factors might increase or decrease the number of reported sightings. I wondered if there was a gender. They used data from the National UFO Research Center and included a total of 98,000 sighting reports over a 20-year period from 2001 to 2020. For each county in the continental United States, they analyzed his two conditions. Light pollution, cloud cover, and canopy cover. And the possibility of an object in the sky, which means near an airport or military installation. Most of the sightings took place in the western United States due to the physical geography of the area: wide open spaces and dark skies.

UAP from declassified video taken by a US Navy aircraft. Image credit: U.S. Navy.

“The idea is that if you have a chance to see something, you're likely to see an unexplained phenomenon in the sky,” said Dr. Richard Medina, a geographer at the University of Utah.

“There's more technology in the sky than ever before, so the question is: what are people actually seeing?”

“This is a difficult question to answer, but an important one because any uncertainty could be a potential threat to national security.”

“Understanding the environmental context of these sightings will help us find explanations for their occurrence and help identify truly anomalous objects that are legitimate threats.”

Dr. Medina and his colleagues looked at the number of sightings per 10,000 people per county and identified significant clusters of low numbers (cold spots) and high numbers of reports (hot spots).

Far more sightings have been reported in the west, northeast, and some isolated areas. Cold spots were in the Central Plains and Southeast.

All results except cloud cover support the general hypothesis that people will see things if they have the chance.

“We have historical ties to the UAP in the West, with military operations at Area 51 in Nevada, Roswell in New Mexico, and here in Utah at the Skinwalker Ranch in the Uinta Basin and the U.S. Army Dugway Proving Ground.” Dr. Medina said.

“Additionally, we have a strong outdoor community that recreates on public lands year-round. People get outside and look at the sky.”

NUFORC reported sightings for the spatial distribution of the continental United States from 2001 to 2020. Image courtesy of Medina other., doi: 10.1038/s41598-023-49527-x.

In July 2022, the U.S. Deputy Secretary of Defense, in coordination with the Director of National Intelligence, directed the establishment of the All Area Anomaly Resolution Office (AARO) as a single authoritative UAP agency to lead and synchronize a whole-of-government approach. problem.

Previous UAP tracking efforts include the project blue booka U.S. Air Force-led project that investigated UFO sightings from 1947 to 1969.

blue bookThe most famous account is the Roswell, New Mexico incident, which claimed that a flying saucer crashed into a desert town on July 8, 1947, and the alien occupants were recovered by government agents.

Many Roswell residents witnessed this mysterious event, which may have led to a surge in flying saucer sightings that swept the United States.

Silence from government officials led to wild speculation and subsequent cover-up regarding the otherworldly visitors.

The US Air Force later revealed that the incident was caused by a secret multi-balloon project to detect Soviet nuclear tests.

Many UAP sightings have natural explanations. For example, the planet Venus is the usual culprit.

We've seen an increase in UAP reports in recent years, likely related to the rapid increase in spacecraft launches and orbiting satellites, including the Starlink satellite train and the proliferation of personal drones across the night sky. It is considered. The challenge is to parse which reports indicate the real threat.

The authors investigate whether there are temporal considerations for variation in sightings based on sociocultural factors.

For example, were there more reports after the Congressional hearings in July 2023 or after the SpaceX launch?

They are also investigating whether sociocultural factors influence UAP sightings. Whether there is a spike in reports after shows like: X files Will it become popular? Are some cultures more likely to see UAPs because of their beliefs?

“The U.S. government, military, intelligence community, and civilian agencies need to understand what is in their operational domain to ensure the safety and security of our nation and its people,” said Physicist Sean, AARO's first director.・Kirkpatrick said. University of Georgia.

“In this age of ubiquitous sensors and data availability, the unknown is unacceptable. The scientific community has a responsibility to investigate and educate.”

team's paper It was published in the magazine scientific report.

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RM Medina other. 2023. Environmental analysis of the likelihood of public UAP sightings and sky views. science officer 13, 22213; doi: 10.1038/s41598-023-49527-x

Source: www.sci.news

AI Used by Majority of UK Undergraduates to Write Essays

More than 50% of undergraduate students admit to using artificial intelligence programs to assist them in writing essays, and educational institutions are exploring the integration of AI programs into the classroom.

A survey conducted by the Higher Education Policy Institute (Hepi) of over 1,000 UK undergraduate students found that 53% utilize AI to create content for graded assignments. 25% use applications like Google Bard or ChatGPT to suggest topics, and 12% use them to generate content.

Only 5% of students admitted to directly copying and pasting unedited AI-generated text into their assessments.


Educators are also exploring the use of AI to streamline their tasks, and the Educational Endowment Foundation (EEF) has initiated a research project on using AI to develop lesson plans, materials, exams, and model answers.

Dr. Andres Guadams, an expert in intellectual property law at the University of Sussex, expressed that it is not surprising that students are increasingly relying on AI and suggested that clear methods for its use should be established through open discussions.

Hepi’s research revealed that 1 in 3 students utilizing AI report experiencing “hallucinations,” meaning they need additional information such as statistics and academic citations to fill in gaps recognized by the AI.

Mr. Guadams mentioned an essay submitted last year that appeared to use unedited ChatGPT output, resulting in a “boring” writing style. However, as the use of AI becomes more prevalent, fewer students are actively utilizing it.

According to the EEF proposal, AI could potentially reduce the workload of teachers and enhance the quality of education. Education Secretary Gillian Keegan highlighted that AI could handle the “heavy lifting” of marking and planning.

Half of the 58 UK schools participating in the EEF project will be provided with a toolkit to create assessment materials and tailor lessons to specific groups of students. AI-generated lesson plans will be evaluated by an independent panel of experts.

Professor Becky Francis, chief executive of the EEF, emphasized the limited research on the impact of AI on real-world education and expressed the importance of this trial in contributing to the evidence base.

Source: www.theguardian.com

Majority of large fishing vessels are not identified as ‘black vessels’ through tracking

The vast majority of the world's industrial fishing vessels are not publicly tracked. Three-quarters of the world's large fishing vessels and one-quarter of transport and energy vessels are “dark vessels” that do not share their location publicly. The discovery comes from analyzing satellite imagery using artificial intelligence, an approach that could help better track human activities that impact the ocean.

“We had this idea that we were missing a large part of the activity that was happening in the ocean, but we didn't know how much we were missing,” he says. Fernando Paolo At Global Fishing Watch, a nonprofit organization based in Washington, DC. “And it turned out to be so much more than we had imagined.”

Paolo et al. used satellite images taken between 2017 and 2021 covering coastal areas where large-scale fishing and other industrial activities occur most often, revealing objects regardless of clouds or darkness. (including radar images that can be used). The researchers trained several AIs to detect and classify boats and marine structures in this dataset.

Researchers compared the ship's global map with a database of ships that publicly broadcast their locations and found that the vast majority did not have automatic identification systems turned on. Such identification is not always required, but if it is not used, it may indicate illegal fishing or other activity.

An AI learned to distinguish fishing boats from other types of boats based on their movement patterns and location. It found that 42 to 49 percent of approximately 63,000 ships fell into this category.

Other AI has identified 28,000 offshore structures related to wind power and oil production, with rapidly growing swarms of offshore wind turbines outnumbering oil infrastructure such as oil rigs. Although such activities other than offshore development and fishing boats are expanding, fishing activity is almost “at its limit,” he said. david kurzma At Global Fishing Watch.

“We have to plan for all non-fishing activities because we are encroaching on fishing grounds,” Krusma said. “The ocean is becoming increasingly crowded, so we need to consider how everything fits together.”

Publicly available satellite images do not have the resolution to detect small fishing boats less than 20 meters in length. Konstantin Kremer with microsoft Esther Rolfe at Harvard University Nature Articles commenting on research. But they said such efforts could improve monitoring of human activity near protected areas and unregulated parts of the ocean.

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Source: www.newscientist.com