Experts often suggest that it takes 10,000 hours of practice to excel in any field. However, not everyone possesses the talent required to become an Olympian or Paralympian. While practice can enhance performance, genetic factors impacting both physical strength and mental aptitude likely make the distinction between “good” and “great” athletes.
Athletic success is also influenced by external factors beyond an individual’s control, such as their birthdate. For instance, in the 2010-11 UEFA Youth Football Tournament, 43% of players were born between January and March (early in the selection cycle). Only 9% of players were born between October and December.
According to many sports psychologists, older children starting school may have an advantage in sports due to factors like size, strength, and confidence. However, the birth month advantage may also be influenced by social factors such as teachers’ perceptions of a child’s abilities.
Therefore, the ideal approach to becoming an Olympian may involve exploring various interests as a child and then focusing on activities where natural talent and, most importantly, enjoyment are found.
Cognitive decline is characterized by a decrease in memory, concentration, and thinking abilities. It is common for individuals to experience increased forgetfulness as they age, such as forgetting names or items they intended to purchase.
However, a more frequent occurrence of these symptoms could indicate cognitive impairment, where cognitive function declines faster than expected due to aging. This can be concerning for both the individual experiencing the symptoms and their loved ones.
Common signs of cognitive impairment include:
Forgetting important dates and events
Losing track of thoughts
Feeling overwhelmed by decision-making and planning
Difficulty navigating familiar places
Becoming impulsive
While cognitive abilities naturally decline with age, the extent and speed of decline vary among individuals and are influenced by genetics and family history. Therefore, two people with similar age-related brain changes may perform differently on cognitive tasks, and individuals with Alzheimer’s disease may exhibit similar cognitive abilities but different brain changes.
What can you do now to prevent cognitive decline?
Building cognitive reserve through experiences like education, occupation, and stimulating activities can help individuals cope with age-related changes. Lifestyle factors like diet, exercise, and social interactions also play a role in cognitive health.
Health conditions like high blood pressure, diabetes, depression, and vascular disease can worsen cognitive decline, but lifestyle changes can help manage or prevent these conditions.
Eat a balanced diet with plenty of leafy greens
Stay active
Limit alcohol consumption
Avoid tobacco products
Eating a nutritious, balanced diet, with plenty of leafy and dark green vegetables, can help keep you healthy both physically and mentally. – Image credit: Getty
Making positive changes in one area of your life can have ripple effects on other aspects of health. Unhealthy habits can create a chain reaction of negative health outcomes, while healthy choices can improve overall well-being.
Habits to avoid
A high-fat diet can increase the risk of obesity, diabetes, and cognitive impairment, while smoking can impact lung capacity and cognitive function. By adopting a low-fat diet and avoiding tobacco products, individuals can reduce their risk of cognitive decline.
While we may not be able to prevent cognitive decline entirely, adopting a healthy lifestyle can help build cognitive reserve and potentially slow the decline. Research is ongoing to uncover more about the factors influencing cognitive health.
Aim for an overall healthier lifestyle
In addition to diet and exercise, engaging in social and sexual activities can benefit cognitive health. Social interactions can stimulate the brain and slow cognitive decline, while maintaining romantic and intimate relationships may improve cognitive function.
Stimulating activities like reading, playing games, or learning new skills can also help prevent cognitive decline. Gender differences in cognitive lifestyle choices may influence cognitive outcomes, highlighting the importance of varied activities for cognitive health.
Get a good night’s sleep
Sleep plays a crucial role in cognitive function, with adequate rest linked to better cognitive outcomes. Napping and getting around eight hours of sleep nightly can help reduce the risk of cognitive decline.
Quality sleep is essential for focus, creativity, and decision-making, while sleep deprivation can negatively impact physical and cognitive health. Establishing good sleep habits is key to maintaining cognitive function as we age.
Regular dental checkups can help prevent cognitive decline
Research suggests that gum disease bacteria may be linked to Alzheimer’s and dementia development, emphasizing the importance of oral health for cognitive well-being. By practicing good oral hygiene and seeking regular dental care, individuals can potentially reduce their risk of cognitive decline.
While there is no miracle cure for cognitive decline, taking proactive steps to improve overall health can slow the rate of decline associated with aging. It’s crucial to address any concerns about cognitive function with a healthcare provider to explore potential treatment options.
It’s a common belief that it requires 10,000 hours of practice to master a skill, but studies suggest that not everyone possesses the innate talent required to become an Olympian or Paralympian. While practice can enhance performance, genetic factors impacting both physical strength and cognitive abilities likely distinguish between “good” and “great” athletes.
The success in sports is also influenced by factors beyond one’s control, such as birth timing. For instance, in the 2010-11 UEFA Youth Football Tournament, 43% of players were born between January and March (earlier in the selection period). Only 9% of players were born between October and December.
Older children who start school may have a physical advantage over their younger peers in terms of size, strength, and confidence. However, many sports psychologists argue that any birth month advantage is also influenced by social factors, such as how teachers perceive a child’s abilities.
Therefore, the most effective approach to becoming an Olympian may involve exploring a range of interests as a child and then focusing on activities where natural talent and enjoyment are evident.
In 1999, the sports world experienced a significant change. On November 10, the World Anti-Doping Agency (WADA) was founded with the goal of “protecting athletes, promoting clean sport values, and upholding the spirit of sports globally.”
WADA was established in response to various high-profile drug-related incidents, such as Ben Johnson’s steroid scandal in the 1988 Olympics and the 1998 “Festina Scandal” involving drugs found in a team car at the Tour de France. It was created out of concern for athlete safety and the potential backlash from audiences towards professional sports.
The WADA Code includes an annual publication of a Prohibited List, which outlines banned substances and methods for both in-competition and out-of-competition use. A substance or method is considered prohibited if it meets two out of three criteria – it may enhance performance, poses health risks to athletes, or goes against the spirit of sport.
This framework aims to create a safer environment for athletes but also presents a grey area where certain substances or methods could be legal but potentially illegal in the future.
As a result, there is ongoing investigation into legal methods and substances commonly used by professional athletes that may face bans in the future.
1. Carbon monoxide rebreathing
With more than 100 deaths annually in the UK due to carbon monoxide poisoning, the use of carbon monoxide rebreathing in sports science may raise eyebrows. However, this method is commonly used to measure hemoglobin levels in athletes.
Through carbon monoxide rebreathing, athletes inhale the gas to measure various blood parameters, particularly hemoglobin content, which impacts oxygen delivery to muscles. This process simulates the effects of training at high altitudes, where athletes produce more red blood cells to enhance performance.
Inhaling carbon monoxide can raise the carbon monoxide level in your blood to about 5 percent. – Photo credit: Getty Images
While this method has its benefits, prolonged exposure to carbon monoxide can have adverse effects on an athlete’s oxygen-carrying capacity, leading to concerns about its use.
2. Oxygen Tent
Similar to carbon monoxide rebreathing, oxygen tents are popular among athletes to simulate high-altitude environments and enhance red blood cell counts. These tents have been used by various sports teams and athletes to improve performance through altitude training.
Former footballer Graham Cooper trains wearing a training mask connected to an altitude generator for low-oxygen training. – Photo credit: Getty
Despite its benefits, the use of oxygen tents has stirred controversy in the past due to concerns about artificially elevated blood parameters and its impact on the spirit of sports. Regulations and bans have been enforced in some regions to address these issues.
3. High-tech trisuit
Alex Yee overtakes New Zealand’s Hayden Wilde in a dramatic finale of the Paris 2024 Olympic triathlon – Photo Credit: Getty
Modern trisuits, like the one worn by British triathlete Alex Yee at the Paris Olympics, incorporate cutting-edge technology to enhance performance. These suits are designed to optimize aerodynamics, improve speed, and potentially provide advantages in water sports.
With innovations in fabric technology and fit, these trisuits are custom-made to maximize performance while complying with sports regulations. The use of advanced materials and design elements can influence race outcomes significantly.
4. Ketone Drinks
Ketone drinks have gained popularity among athletes for their potential to boost energy levels without the need for starvation. These drinks can help conserve glycogen reserves during intense exercise, improve endurance, and enhance recovery between workouts.
Despite their benefits, the use of ketone drinks raises concerns about their long-term effects on health and athletic performance. Organizations like the Movement for Credible Cycling (MPCC) advocate against the use of ketones due to insufficient research and potential risks associated with their consumption.
5. Caffeine
Caffeine remains a popular dietary supplement among athletes due to its proven performance-enhancing effects. Studies have shown that caffeine can improve fat burning, speed, and endurance by stimulating neuronal activity in the brain and triggering the release of adrenaline.
While caffeine is legal and widely used, there are concerns about its safety when consumed in excessive amounts. Regulations on caffeine use have evolved over time, with bans being implemented and lifted based on scientific evidence and health considerations.
in New paper Published in Astrophysical JournalDr. Ravi Kopparapu of NASA’s Goddard Space Flight Center and colleagues assessed the detectability of silicon solar panels on Earth-like exoplanets as potential technological signatures.
Conceptual illustration of an exoplanet with an advanced extraterrestrial civilization. The structure on the right is an orbiting solar panel array that collects light from the parent star, converts it into electricity and transmits it via microwaves to the surface. The exoplanet on the left shows other potential technological features: on the night side there are city lights (the glowing circular structures), and on the day side there are multi-colored clouds representing various forms of pollution, such as nitrogen dioxide gas from the burning of fossil fuels and chlorofluorocarbons used in refrigeration. Image credit: NASA/Jay Freidlander.
“The search for extraterrestrial life has primarily focused on detecting biosignatures – remote observations of atmospheric or ground-based spectral properties that indicate signs of life on exoplanets,” said Dr Kopparapu and his co-authors.
“Recently, there has been a rise in interest in technosignatures, which refer to observational signs of extraterrestrial technology that can be detected or inferred through astronomical surveys.”
“While the search for extraterrestrial intelligence through radio observations has been popular for decades, recent studies have proposed an alternative: searching for technological signatures in the ultraviolet to mid-infrared spectral range.”
Astronomers speculate that extraterrestrials might build solar panels out of silicon because it is relatively abundant compared to other elements used in solar power generation, such as germanium, gallium, and arsenic.
Silicon is also excellent at converting light emitted by stars like the Sun into electricity, and it is cost-effective to mine and manufacture into solar cells.
The researchers also assume that a hypothetical extraterrestrial civilization would rely solely on solar energy.
However, if other energy sources, such as nuclear fusion, were used, the technological signature of silicon would be diminished, making the civilization even more difficult to detect.
Furthermore, they assume that the population of the civilization will stabilize at some point, and if for some reason this does not happen, they may end up expanding the Eternal Father into deep space.
For the study, scientists used computer models and NASA satellite data to simulate Earth-like planets with different degrees of silicon solar panel coverage.
They then modeled an advanced telescope, like NASA’s proposed Habitable Worlds Observatory, to see if it could detect the solar panels of a planet about 30 light-years away, a relatively close galaxy that is more than 100,000 light-years across.
The researchers found that hundreds of hours of observation time would be required with this type of telescope to detect signals from solar panels covering about 23% of the land area of an Earth-like exoplanet.
However, the solar panel coverage needed to support 30 billion people with a high standard of living was only around 8.9%.
“We find that even if the current population of around 8 billion were to stabilise to a high standard of living of 30 billion and run solely on solar energy for power, it would still use far less energy than the total amount of sunlight illuminating the Earth,” Dr Kopparap said.
The research has implications on the Fermi Paradox, proposed by physicist Enrico Fermi, which asks why extraterrestrial civilizations have not spread across the galaxy by now, given that our own Milky Way galaxy is ancient and vast, making interstellar travel difficult but possible.
“This suggests that if a civilisation chooses a very high standard of living, it may not feel the need to expand across the galaxy because it can achieve sustainable population and energy use levels,” Dr Kopparap said.
“They may expand within their own star system, or neighboring star systems, but there may not be a galaxy-wide civilization.”
“Furthermore, our own technological expertise may not yet be able to predict what more advanced civilizations will be able to achieve.”
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Ravi Kopparap others2024. Detectability of Solar Panels as a Technology Signature. ApJ 967, 119; doi: 10.3847/1538-4357/ad43d7
This article is based on a press release provided by NASA.
Sergio Pitamitz/VW Pics/Universal Images Group via Getty Images
Uplifting the land beneath the Antarctic ice sheet could help slow ice loss and limit sea level rise over the coming centuries, but if emissions continue to rise, it could cause more sea levels to rise than the ice melt alone.
The findings come from models that simulate Earth’s mantle, the layer beneath the crust, in greater detail than ever before. When Antarctica loses its weight as ice melts, the elastic mantle beneath it bounces back, causing the land above it to rise. When ice melts and the continents lose their weight, Earth’s elastic mantle bounces back, causing the land above it to rise. The bounced back land can slow the flow of ice sheets where they meet the ocean. This “sea-level feedback” occurs primarily because the uplifted land changes the shape of the ocean floor, limiting the thickness of the ice sheet’s edges. Thinner ice there reduces the overall inflow of ice into the ocean.
Researchers have long suspected that this effect plays a role in slowing ice loss, but it was unclear when this effect begins or how it varies in different parts of the ice sheet.
Natalia Gomez Gomes and his colleagues at McGill University in Canada modeled the relationship between the melting ice and the rebounding land, and also simulated the mantle, capturing the different viscosities beneath the continents: East Antarctica sits on a more viscous mantle and thicker crust, while West Antarctica’s rapidly melting glaciers sit on a less viscous mantle and thinner crust. This more detailed picture of Earth’s interior is based on precise measurements of ice sheet elevation changes over decades, as well as data about the mantle beneath Antarctica from seismic waves generated by earthquakes. “This is hard-earned,” Gomes says.
The researchers found that under a very low emissions scenario, compared to a model that considered the ground beneath the ice solid, land uplift would reduce Antarctica’s contribution to global mean sea level rise by more than 50 centimeters by 2500. This effect was less pronounced under a moderate emissions scenario, but still led to a large reduction in sea level rise, with effects starting to be felt as early as 2100.
But in a very high emissions scenario, the team found that land uplift in Antarctica would raise sea levels by an additional 0.8 meters by 2500. This happened because the ice sheet retreated faster than land uplift, and the rising sea floor pushed more water into the rest of the ocean.
“From a modeling perspective, this is a huge step forward.” Alexander Bradley The British Antarctic Survey’s Bradley says it’s always been thought that land uplift would limit sea-level rise, but this high-resolution modeling shows that the effect depends on emissions. “The changes that occur in the 21st and 22nd centuries will depend very much on what we do now,” he says.
Alexander Lovell Researchers at the Georgia Institute of Technology in Atlanta call it a “very good simulation,” but the scenario in which land uplift drives sea level rise is based on worst-case assumptions about emissions and the rate at which ice sheets are retreating.
In regions of the rural West, high-stress wildfire events are leading to common sentiments among residents. These events are becoming more frequent, with large fires and evacuations leaving people tired of their lives being uprooted. Many have become accustomed to the risk and are more confident in their ability to handle the situation on their own.
As a result, some individuals are choosing to stay in their homes despite evacuation orders from authorities, especially in areas where there is a lack of trust between local residents and those managing emergency responses. Amanda Stasiewicz, an assistant professor at the University of Oregon, noted that this sense of mistrust is contributing to more rural communities deciding to stay and defend themselves during wildfires.
The increasing intensity of fires due to climate change is leading fire managers to take a more conservative approach, which is further straining relations in rural communities. With fires becoming more aggressive, creating their own weather patterns and becoming less predictable, residents are feeling the need to take matters into their own hands.
Similar movements are happening in other rural areas, such as Northern California where residents facing the Park Fire have chosen not to evacuate. In total, there are 94 major fires being battled by over 29,000 firefighters across the West.
The current fire season in the Pacific Northwest has been particularly severe, with 51 large fires burning in Oregon, Washington, and Idaho. The Pioneer Fire in Stehekin has grown to over 33,700 acres, with only 12% containment.
Residents of Stehekin, a remote community of approximately 85 people, are facing the challenge of the Pioneer Fire. Surrounded by mountains and Lake Chelan, the community is known for its resistance to modern conveniences and its self-sufficiency.
As the fire season progresses, sentiments like those seen in Stehekin are becoming more common in rural communities. With evacuation presenting financial burdens and concerns about asset protection, rural residents are feeling the need to fend for themselves during these natural disasters.
About 66 million years ago, at the end of the Cretaceous period, a 10 km-wide asteroid struck Earth near what is now the town of Chicxulub in Mexico. The impact wiped out about 75% of Earth's animal and plant species, including groups such as non-avian dinosaurs and ammonites. A new study identifies key changes in bird genomes caused by the end-Cretaceous mass extinction that ultimately contributed to the remarkable diversity of modern birds.
This painting depicts an asteroid impact in the shallow tropical ocean of the sulfur-rich Yucatan Peninsula in what is now southeastern Mexico. The impact of this massive asteroid, which occurred about 65 million years ago, is believed to have wiped out the dinosaurs and many other species on Earth. The painting shows a Pterodactylus, a flying reptile with a wingspan of up to 50 feet, gliding above low tropical clouds. Image by Donald E. Davis/NASA.
“By studying the DNA of modern birds, we can detect patterns in gene sequences that changed shortly after one of the most significant events in Earth's history,” said Dr Jake Barb, from the University of Michigan.
“The signatures of these events appear to be imprinted in the genomes of survivors in ways that are detectable tens of millions of years later.”
An organism's genome is made up of four nucleotide molecules designated by the letters A, T, G, and C. The order of these nucleotides in the genome defines the blueprint of life.
The DNA code can evolve in ways that change the overall composition of DNA nucleotides across the genome.
These changes in composition are important in determining what genetic variations are possible and contribute to an organism's evolutionary potential, or ability to evolve.
Dr. Belf and his colleagues found that the mass extinction caused a change in nucleotide composition.
The researchers also found that these changes appear to be related to the birds' development as young birds, their adult size, and their metabolism.
For example, in the approximately 3 to 5 million years following the mass extinction at the end of the Cretaceous period, surviving bird lineages tended to decrease in body size.
The development of hatchlings has also changed, with more species becoming 'altricial'.
“This means that when they hatch they are still in a fetal state and need to be fed by their parents, and it may take several weeks for them to fledge,” Dr Barb said.
“Birds that are ready to fend for themselves immediately after hatching, like chickens and turkeys, are called 'precocious.'”
“We found that adult body size and pre-hatching developmental patterns are two important traits of bird biology that we can link to the genetic changes we are detecting.”
“One of the most important challenges in evolutionary biology and ornithology is unraveling the relationships between the major bird groups. The structure of the extant bird phylogenetic tree is difficult to determine.”
Over the past 15 years, researchers have been trying to solve this problem by applying increasingly large genomic datasets.
So far, they have used genomic data to study the evolution of bird genomes using statistical models based on strong assumptions.
These traditional models allow researchers to reconstruct the history of genetic change, but they typically assume that the makeup of DNA, i.e. the proportions of A, T, G and C nucleotides, remains constant throughout evolutionary history.
The study authors developed software tools to more closely track DNA composition over time and across different branches of the tree of life.
This tool allowed us to relax the assumption that DNA's composition is constant.
“This allows us to vary our models of DNA evolution across the evolutionary tree and identify places where there may have been changes in DNA makeup,” said Professor Steven Smith, from the University of Michigan.
“In this new study, these changes were clustered within about five million years of the end-Cretaceous mass extinction,” Dr Belff added.
This approach also allowed the team to estimate which bird traits are most closely associated with changes in DNA composition.
“This is an important type of genetic change that we think is associated with mass extinctions,” Dr Barb said.
“To our knowledge, changes in DNA composition have never before been so clearly linked to the end-Cretaceous mass extinction.”
“We know that mass extinctions can have dramatic effects on biodiversity, ecosystems and the forms of life,” said Professor Daniel Field, from the University of Cambridge.
“Our study highlights that these extinction events can have even larger effects on organismal biology by altering key aspects of genome evolution.”
“This study improves our understanding of the dramatic biological impact of mass extinction events and highlights that the mass extinction that wiped out the giant dinosaurs was one of the most biologically consequential events in the entire history of the Earth.”
By relaxing typical assumptions used in evolutionary biology, the researchers are developing more nuanced insights into the sequence of events in birds' early history.
“We haven't typically thought of changes in DNA configurations and models across the tree of life as changes that indicate something interesting happened at a particular time and place,” Prof Smith said.
“This study shows that we've probably missed something.”
of study Published in the journal Scientific advances.
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Jacob S. Belf others2024. Genomic and life-history evolution link bird diversification and the end-Cretaceous mass extinction. Scientific advances 10(31); doi: 10.1126/sciadv.adp0114
This article is a version of a press release provided by the University of Michigan.
This week, NASA leaders are engaged in deep discussions regarding the return of the agency’s astronauts to their spacecraft. Boeing They are considering either salvaging the unexploded Starliner spacecraft or using a SpaceX spacecraft for the crew’s rescue.
Concerns about Starliner have arisen due to NASA’s inability to determine the root cause of the spacecraft’s failure, which led to thruster failure during docking, according to a source familiar with the matter as told to CNBC.
NASA is contemplating the possibility of returning Starliner empty and utilizing SpaceX’s Crew Dragon spacecraft to bring back the astronauts. The decision-makers are currently divided, and the outcome of NASA’s ongoing discussions remains uncertain, given the complexities involved.
Starliner’s Calypso capsule has been in space for over 59 days and counting, with the mission aimed at proving Boeing’s spacecraft safe for long-duration crewed missions to and from the ISS.
Originally scheduled for at least nine days, Boeing’s crewed flight has been extended multiple times for tests to resolve thruster issues, raising concerns about the spacecraft’s safety for astronaut return.
While Boeing expresses confidence in Starliner’s ability to safely return with astronauts, NASA and Boeing executives have differing perspectives on the matter, with NASA considering alternate options like using SpaceX as a backup.
Ars Technical reported mixed reactions from NASA regarding the Starliner situation, with ongoing discussions on whether to rely on SpaceX’s Crew Dragon instead.
Should Starliner return empty, the likely alternative would involve removing astronauts from an upcoming Crew 9 mission to make way for the return of Wilmore and Williams.
Despite ongoing discussions, NASA has yet to make a decision on Starliner’s return, maintaining a focus on exploring all available options.
Trust the thrust
Following a recent test, NASA noted the good condition of Starliner’s thrusters, despite concerns about the root cause of past failures and the potential for additional issues during the return flight.
Boeing continues to investigate the thruster issues and plans to conclusively identify the root cause before proceeding with the return of the spacecraft.
NASA must weigh the risks associated with Starliner’s thruster problems before making a decision on the spacecraft’s return.
Unpredictable results
The lack of consensus within NASA’s Commercial Crew Program Management Board underscores the uncertainty surrounding Starliner’s return, with discussions ongoing to assess the risks involved.
Any disagreements within the board will be escalated until a resolution is reached, indicating the complexity of the decision-making process.
Make a Choice
NASA faces a critical decision regarding the safe return of astronauts aboard Starliner, with implications for Boeing’s participation in the Commercial Crew program.
The choice between backing Boeing or opting for SpaceX’s alternative could have significant consequences for the future of the program and the companies involved.
Ultimately, NASA must carefully consider the risks and implications of their decision to ensure the safety of the astronauts and the success of future missions.
Jutting out into the Tasman Sea between Australia and New Zealand is the curved, crescent-shaped volcanic remnant of Lord Howe Island. Measuring 10 kilometres in length and 2 kilometres at its widest point, the rocky island is covered in lush, unspoiled forest and boasts a sandy, coral-rich lagoon.
“This is paradise.” Neil HadawayA photographer who went there to document the activities of the marine research group. drifting“There are birdsongs all around, beautiful coral reefs and golden sand beaches.” Among the bird calls is the shearwater (Aldena CarneipesOf the total, approximately 22,000 breed on the island.
Petrel chick (Ardenna carneipes)
Neil Hadaway
But life there is not ideal, and newly hatched petrel chicks, like the one pictured above, are under threat from increasing marine plastic pollution. Adult petrels mistake plastic debris in the sea for food and end up feeding it to their young. In fact, Adrift researchers have found that the amount of plastic ingested by chicks is increasing every year. One of the team, pictured below, sifts through chunks of plastic in the stomach of just one bird.
As a result, these chicks become increasingly underdeveloped, with dozens dying each year from starvation and plastic-related diseases.
“This island may be magical,” Hadaway said, “but it's also full of frustration and sadness.”
He says stricter laws against plastic pollution are needed to protect populations of petrels, which locals affectionately call “muttonbirds” (see above) after their taste.
Many young climate advocates believe Kamala Harris is stronger on environmental issues than Joe Biden.
The Biden administration’s Inflation Control Act was the largest climate change investment in U.S. history, but young environmentalists want even more.
They cited Harris’ record of prosecuting oil companies and her co-sponsorship of the Green New Deal as reasons to support her.
President Joe Biden may have passed the most significant climate change bill in U.S. history, but many young environmental activists say they believe Kamala Harris has a stronger case on the issue.
The heads of 11 groups dedicated to raising young voters’ concern about climate change said Harris’ track record going after big oil companies as a prosecutor and her co-sponsoring of the Green New Deal as a senator made her a more appealing candidate than Biden, despite her victories on environmental issues.
“She has a track record of holding big oil accountable in a way that we haven’t been able to do for the last four years,” said Al-Shainee Ajay, 26, executive director of the Sunrise Movement, which advocates for government intervention to combat climate change.
The Green New Deal Network is a coalition of 19 progressive environmental and social justice organizations, including the Sunrise Movement. I endorsed Harris this week. However, he has never previously voiced his support for Biden.
The Biden administration’s record on climate is relatively good. The biggest investment in climate change For the first time in U.S. history, we have allocated nearly $370 billion to environmental protection efforts; and Infrastructure Investment and Jobs Act These include investments in clean energy, electric vehicle infrastructure, public transport and strengthening climate resilience.
But several young environmental activists, ages 16 to 29, said those successes have been clouded by the expansion of the fossil fuel industry during Biden’s term.
“Frankly, I’m frustrated that this administration claims to be showing leadership on climate change yet approves so many fossil fuel projects,” said Keanu Arpels Josiah, 19, an organizer with Fridays for Future, an international youth-led climate change group started by Greta Thunberg.
The White House did not respond to a request for comment.
Vice President Harris visited Lake Mead in 2021 and delivered a speech there. Kent Nishimura/Los Angeles Times via Getty Images file
Dana Fisher, director of the Center for Environment, Community and Equity at American University, said it’s not that young voters are ignoring Biden’s climate change efforts, they just want to see more of them.
“Young people are aware of how serious the climate crisis is, and they know that this is not enough,” Fisher said.
She also said several young environmental activists told her in the spring that they were encouraging their members to refrain from voting in the presidential election altogether.
“I was like, ‘Are you kidding me? Don’t you remember what happened in 2000?'” Fischer said, referring to the slim margin that decided that year’s presidential election. “Of course they didn’t know, because if they were alive, they were in diapers. It’s very hard to take the long view when you’re young.”
Fischer said the young environmental activists she has spoken to seem more likely to vote since Biden dropped out of the race.
Harris’ younger supporters highlight the settlements she won as California’s attorney general. Chevron, BP and ConocoPhillips Regarding handling of hazardous materials.
“Biden is much more moderate in terms of his policy approach, but Kamala is not afraid to really get to the bottom of environmental and climate policy, especially against polluters,” said Iris Zhang, 20, a youth advisory board member at the Global Youth Storytelling and Research Lab, which engages young leaders in climate and environmental justice research.
Harris referenced that early work at several points during her campaign’s early days.
“As District Attorney, I created one of the first Environmental Justice Units in the nation to go after polluters,” she says. July 22 in WilmingtonThe Delaware native spoke about her time as district attorney in San Francisco, when “Donald Trump stood at Mar-a-Lago and told lobbyists for Big Oil that he would do what they said for $1 billion in campaign contributions.”
On September 15, 2020, then-Senator Kamala Harris met with Governor Gavin Newsom and Cal Fire officials to assess the damage caused by the Pine Ridge Creek Fire in California. Carlos Avila Gonzalez/San Francisco Chronicle via Getty Images file
Harris’s California background also appears to be resonating with young environmentalists.
Zanagie Artis, 24, co-founder of the climate justice group Zero Hour, said that because California regularly experiences the effects of the climate crisis, including droughts, heat waves and wildfires, “there is a lot of value in empathizing with young people who are fighting so hard for climate justice.”
Young activists pointed to Harris’ climate change policies. 2020 Presidential ElectionAt the time, she pledged to invest $10 trillion over 10 years in climate change efforts, and set a goal of transitioning to a 100% clean energy economy by 2045.
“We want her to be able to set the standard and not just follow the Biden administration’s lead,” said Natalie Bookout, who turned 18 in October and leads the Sunrise Movement chapter in Charlotte, North Carolina.
Sunrise Movement protesters gathered near VP Harris’ Brentwood home on April 14, demanding that she urge President Biden to declare a climate emergency. Robert Gautier/Los Angeles Times via Getty Images file
Heather Hargreaves, executive director of campaigns at Climate Power, a communications organization focused on electing climate change leaders, said that among young people, “there may just be a knowledge gap about what President Biden has done over the last three years.”
A Harris campaign spokesman said she plans to strengthen climate change efforts in the Inflation Control Act, but declined to answer a question about whether she has more support than Biden among younger environmentalists.
The spokesperson also said Harris Said in 2019 If elected president, she would ban fracking.I no longer support such bans.
“She doesn’t want to alienate people from fossil fuel states,” Fischer said. “She’s not going to be as progressive as she was in California. But will she be more progressive than Biden? I expect she will.”
Vice President Kamala Harris looks out at the Hyperwall during a discussion on climate change at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, on November 5, 2021. Olivier D’Uglier/AFP via Getty Images file
Harris represents dozens of environmental groups and more than 350 www.nbcnews.com
Scientists have made a groundbreaking discovery in the hair loss industry by finding that a naturally occurring sugar in the human body, 2-deoxy-D-ribose (2dDR), could be the key to combating male pattern baldness.
The study, published in the journal The forefront of pharmacology, revealed that this natural sugar treatment is as effective as current FDA-approved treatments with fewer side effects.
Research co-author, Professor Sheila McNeill, highlighted the potential of 2dDR in increasing blood supply to hair follicles and promoting hair growth. The study was initially focused on wound healing, where accelerated hair growth was observed around sites treated with 2dDR.
Testing in mice showed that 2dDR Gel was 80-90% as effective as minoxidil, a common FDA-approved hair loss treatment found in products like Rogaine and Celoxidil. The discovery offers a promising, safer alternative with fewer side effects, as 2dDR is naturally occurring in the body.
Experts, such as Professor Muhammad Yar, stressed the potential benefits of 2dDR in stimulating blood vessel growth, crucial for healthy hair follicles, and promoting hair growth.
While the research is still in early stages, it could provide hope for those suffering from hair loss conditions like chemotherapy-induced alopecia. More studies are needed before 2dDR-based treatments become available, but the results so far are promising.
For men dealing with hair loss, this discovery offers a ray of hope for an effective, natural, and non-invasive treatment option. Further research is warranted to explore its effects on human hair growth and follicle health.
Learn more from our experts:
Sheila McNeill: Professor Emeritus of Tissue Engineering with a focus on translating research into clinical practice.
Muhammad Yar: Associate Professor with expertise in tissue engineered skin and targeted drug delivery.
Claire Higgins: Lecturer specializing in tissue engineering and regenerative medicine, focusing on skin and hair follicles.
Concerned that you may be dealing with ADHD? Have you ever caught yourself trailing off in the middle of a conversation, getting lost in your own thoughts? It is normal to lose focus, but if you constantly find yourself daydreaming and struggling to concentrate, you may be experiencing a lesser-known attention disorder known as Cognitive Withdrawal Syndrome (CDS).
While often mistaken for laziness, lack of motivation, or ADHD, CDS is actually a legitimate neurological disorder that is gaining more attention from scientists and researchers.
What exactly is cognitive withdrawal syndrome?
CDS was first described in the 1960s as “cognitive tempo slowing” and was rebranded in 2022 to better reflect its core feature: cognitive detachment.
“CDS is characterized by symptoms such as confusion, daydreaming, absent-mindedness, and drowsiness,” according to Dr. Sophia Boukas, an Academic in Psychology and Education at Brunel University, London, in BBC Science Focus. People with CDS often take longer to complete tasks, but this does not affect the quality of their work, they simply require more time.
Although CDS is gaining recognition, it has not yet been officially classified as a disorder. The Diagnostic and Statistical Manual of Mental Disorders is used by medical professionals to diagnose mental disorders.
Research suggests that CDS may impact 5-7% of children, comparable to ADHD, indicating that a significant number of people may be experiencing CDS symptoms without realizing it.
Is CDS a form of ADHD?
CDS and ADHD are distinct conditions, but they share similarities and overlaps that can cause confusion. While ADHD can manifest in three ways, primarily inattention, hyperactivity, or a combination of both, CDS is more closely associated with predominantly inattentive ADHD, rather than hyperactivity disorder.
Research shows that between 25 and 40 percent of youth with ADHD exhibit symptoms of CDS. Importantly, CDS can also occur in individuals without ADHD.
What treatments are available?
As CDS is not yet officially recognized as a disorder, seeking treatment can be challenging. However, some psychologists are using questionnaires and behavioral observations to help diagnose the condition, which may eventually lead to formal diagnostic criteria.
Organizations like Cincinnati Children’s Hospital are pioneering CDS assessment and treatment, offering resources such as psychoeducation, parent training, cognitive behavioral therapy, and more.
Cognitive behavioral therapy, sleep hygiene, and mindfulness practices are emphasized for managing CDS. Treatment options are still evolving, with non-stimulant medications showing promise for CDS, while stimulants commonly used for ADHD may not be as effective.
If you suspect you or your child may have CDS, it’s important to consult a medical professional for guidance on treatment options.
About our experts
Sofia Barbosa-Boucas is a Lecturer in Psychology (Education) at Brunel University, London, known for significant contributions to psychology and education.
Use of Data ESA's Gaia mission Astronomers have discovered a number of metal-poor stars that are more than 13 billion years old and in orbits similar to our sun.
Rotational motion of a young (blue) and an older (red) star similar to the Sun (orange). Image credit: NASA / JPL-Caltech / R. Hurt / SSC / Caltech.
“The Milky Way has a large halo, a central bulge and bar, and thick and thin disks,” said Dr Samir Nepal of the Leibniz Institute for Astrophysics Potsdam and his colleagues.
“Most of the stars are found in a thin disk of the so-called Milky Way galaxy, which revolves regularly around the galactic center.”
“Middle-aged stars like our Sun, which is 4.6 billion years old, belong to a thin disk that is generally thought to have begun to form between 8 and 10 billion years ago.”
Astronomers used the new Gaia data set to study stars within about 3,200 light-years of the Sun.
They found a surprisingly large number of very old stars in the thin disk orbit, most of which are over 10 billion years old, with some being over 13 billion years old.
These ancient stars show a wide range of metal compositions: some are very metal-poor (as expected), while others have twice the metal content of the much younger Sun, indicating that rapid metal enrichment occurred early in the evolution of the Milky Way.
“These ancient stars in the disk suggest that the formation of the Milky Way's thin disk began much earlier than previously thought, around 4 to 5 billion years ago,” Dr Nepal said.
“This study also reveals that the Galaxy underwent intense star formation early on, leading to rapid metal enrichment in its inner regions and the formation of a disk.”
“This discovery brings the Milky Way's disk formation timeline into line with that of high-redshift galaxies observed with the NASA/ESA/CSA James Webb Space Telescope and the Atacama Large Millimeter Array (ALMA).”
“This shows that cold disks can form and stabilize very early in the history of the universe, providing new insights into the evolution of galaxies.”
“Our study suggests that the Milky Way's thin disk may have formed much earlier than previously thought and that its formation is closely linked to an early chemical enrichment in the innermost regions of the galaxy,” said Dr Cristina Chiappini, astronomer at the Leibniz Institute for Astrophysics Potsdam.
“The combination of data from different sources and the application of advanced machine learning techniques has allowed us to increase the number of stars with high-quality stellar parameters, which is an important step leading our team to these new insights.”
Samir Nepal others2024. Discovery of local counterparts of disk galaxies at z > 4: The oldest thin disk in the Milky Way using Gaia-RVS. A&Ain press; arXiv: 2402.00561
Pakdipthes hakataramea Body size would have been similar to that of modern humans Little Blue Penguin (Eudyptula minor)It is approximately 40-45 cm (15.7-17.7 in) in length.
Artist image Pakdipthes hakatarameaPhoto courtesy of Tatsuya Niimura / Ashoro Museum of Paleontology
Pakdipthes hakataramea It lived in New Zealand about 24 million years ago (Late Oligocene Epoch).
This new species was very small, about the size of a little blue penguin. World's smallest — They have anatomical adaptations that allow them to dive.
“Pakdipthes hakataramea “This fossil fills the morphological gap between modern and fossil penguins,” said Dr. Tatsuro Ando, a paleontologist at the Ashoro Museum in Ashoro Town.
“In particular, the shape of the wing bones is very different, and it was unclear how penguins' wings acquired their current shape and function.”
“The humerus and ulna show how penguins' wings evolved.”
“To my surprise, Pakdipthes hakataramea It was very close to the condition of modern penguins, but the elbow joint was very similar to that of older types of fossil penguins.
“Pakdipthes hakataramea This is the first penguin fossil to be found in this combination and is a key fossil that will shed light on the evolution of penguins' wings.”
Fossilized remains Pakdipthes hakataramea The fossils were discovered by palaeontologists Craig Jones and Professor Euan Fordyce during a series of field expeditions in the Hakataramea Gorge in South Canterbury in 1987.
“Analysis of internal bone structure compared with data from modern penguins shows that these penguins had microanatomical features indicative of diving behaviour,” said Dr Carolina Lock, a palaeontologist at the University of Otago.
Modern penguins have excellent swimming abilities, thanks mainly to their dense, thick bones that provide them with buoyancy when diving.
in Pakdipthes hakatarameaAlthough the medullary cavity containing the bone marrow was open, the cortical bone was quite thick, similar to that seen in modern little blue penguins, which tend to swim in shallow waters.
ability Pakdipthes hakataramea Their ability to dive and swim depends on a unique combination of bones.
“Penguins evolved rapidly from the late Oligocene to the early Miocene. Pakdipthes hakataramea “This is a significant fossil from this period,” Dr Locke said.
“Their small body size and unique bone combination may have contributed to the ecological diversity of modern penguins.”
Discovery Pakdiptes hakataramea teeth, paper In Journal of the Royal Society of New Zealand.
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Tatsuro Ando othersA new small penguin fossil discovered from the Late Oligocene of New Zealand and morphofunctional changes in penguin wings. Journal of the Royal Society of New ZealandPublished online July 31, 2024, doi: 10.1080/03036758.2024.2362283
Planetary scientists have identified layers of graphene formed alongside complex minerals in lunar regolith samples collected by China's Chang'e-5 probe, a discovery that provides new insight into the origins of the Moon and supports the hypothesis that it contains carbon.
Structural and compositional characteristics of few-layer graphene in lunar soil samples from Chang'e-5. Image courtesy of Zhang others., doi: 10.1093/nsr/nwae211.
“Graphene's novel physical phenomena and extraordinary properties have revolutionized research in condensed matter physics and materials science,” said Professor Zhang Wei of Jilin University and his colleagues.
“It plays an increasingly important role in a wide range of fields, including planetary and space sciences.”
“It is estimated that about 1.9% of all interstellar carbon exists in the form of graphene, and protosolar graphene has been identified in carbonaceous chondrite meteorites.”
The researchers analyzed an olive-shaped lunar soil sample measuring about 2.9 millimeters by 1.6 millimeters, collected by the Chang'e-5 mission in 2020.
Using a specialised spectrometer, they discovered iron compounds in the carbon-rich parts of the sample that are closely related to the formation of graphene.
The researchers then used advanced microscopy and mapping techniques to determine that the carbon content within their samples was made up of “flakes” of two to seven layers of graphene.
The scientists propose that few layers of graphene could have formed during volcanic activity in the Moon's early existence, catalysed by solar wind stirring up the lunar soil and iron-containing minerals, prompting a change in the structure of carbon atoms.
Meteorite impacts creating high temperature and pressure environments may also have led to the formation of graphene.
“The first study to confirm the presence of native few-layer graphene in lunar soil samples by examining its microstructure and composition,” the authors said.
“Our discovery provides new insight into the origin of the Moon and supports the hypothesis that the Moon contains carbon.”
“Moreover, graphene's unusual properties depend strongly on its structure and environment.”
“Further investigation of the properties of natural graphene could provide more information about the geological evolution of the Moon.”
“Consequently, the formation of natural graphene by mineral catalysis sheds light on the development of low-cost, scalable synthesis techniques for high-quality graphene.”
“This will therefore propel a new lunar exploration program forward, with some exciting breakthroughs in the future.”
New genus and species of monophenestratan pterosaur named Propterodacillus frankellae It documents the transition from the older rhamphorhynchoid pterosaurs to pterodactyloids.
The holotype Propterodacillus frankellaeImage credit: Frederik Spindler, doi: 10.26879/1366.
Propterodacillus frankellae It lived about 150 million years ago, during the Kimmeridgian stage of the Late Jurassic Period.
This flying reptile had a moderately long skull, about 9 centimetres (3.5 inches) long, and an estimated wingspan of about 55 centimetres (21.7 inches).
This species also had a very short tail and a small but functional fifth finger with two phalanges.
Propterodacillus frankellae a kind of Monophenestratan (Monofenestrata) is a large group of pterosaurs that includes the family Turconopteridae and the suborder Pterodactyloidea.
“As the earliest actively flying vertebrate lineage, pterosaurs were highly successful in evolution throughout the Mesozoic Era.” Dr. Frederick Spindler “The dinosaur museum's Altmühlthal writes in the new paper:
“For most of the long history of research, every specimen could be classified as belonging to one of two major types: the more ancestral long-tailed Rhamphorhynchioidea and the derived short-tailed Pterodactyloidea.”
“The rare anurognathids, the only short-faced pterosaurs, have similarly short tails but otherwise look like rhamphorhynchids and are therefore generally thought to have been deep-nesting rhamphorhynchids.”
“True intermediate, and therefore plausible transitional, forms between the major types were unknown until the discovery of the Curculionoptera.”
The fossil, named the Painten protterosaur, was discovered beneath the Rigol limestone quarry near Painten in Bavaria, Germany.
The specimen consists of a complete and fully articulated skeleton with soft tissue remaining in the radial fibrils of the torso and wings.
“Propterodacillus frankellae It is contemporary with the oldest Archaeopteryx “It came from a nearby basin,” the paleontologists wrote in their paper.
According to Dr Spindler, the discovery fills one of the largest knowledge gaps in the evolution of pterosaur morphology.
“Propterodacillus frankellae “It's a near-perfect mix of rhamphorhynchoid, curcunopteroid and derived pterodactyloid pterosaur features,” he said.
“Similarities with the derived Pterodactyloidea include the shape of the skull and the short tail.”
“For example, the ancestral traits shared with the Turconogopteridae family are Propterodactyl The most distinctive features of this pterosauroidea animal are its functional fifth toe and long caudal snout.”
“Intermediate conditions apply for neck extension, metacarpal extension, and shortening of the fifth toe.”
of paper Published online in the journal Palenitrogy Electronica.
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Frederick Spindler. 2024. Pterosaur articulation from the Late Jurassic of Germany. Palenitrogy Electronica 27(2):a35; doi:10.26879/1366
Peru’s Kecheke Glacier is retreating due to global warming
Emilio Mateo/Aspen Global Change Institute
Andean glaciers are almost certainly smaller than they have been for at least the past 130,000 years, a study of rocks exposed by melting ice has found.
“Frankly, this came as a shock to us.” Andrew Golin “We believe this is clear evidence that at least one part of the world has moved away from the comfortable climatic conditions that have fostered the development of human civilization,” said the University of California, Berkeley researcher.
The Andes are so high that many permanent glaciers exist in the tropics. In fact, almost all of the world’s tropical glaciers are found in the Andes.
For decades it has been clear that global warming is causing these glaciers to thin and retreat, but it has been unclear how this compares to what happened in the more distant past.
Gorin and his colleagues analyzed 20 samples of rocks recently exposed by the retreat of four tropical glaciers in the Andes. They looked at carbon and beryllium isotopes, which form when exposed rocks are hit by cosmic rays, and can reveal when a glacier last retreated beyond a particular point.
Similar studies in the world´s north have found that glaciers were at their smallest thousands of years ago, in the middle of the current interglacial period, because changes in Earth´s orbit caused more sunlight in the north during winter, causing glaciers to retreat, Gorin said.
Although the northern glacial retreat during the Interglacial Period was a regional rather than global phenomenon, the researchers expected to find a similar phenomenon in the Andes at the time, but the levels of the isotype they found were so low they were barely detectable.
“This is a wake-up call,” Gorin said. “It’s like a canary in the coal mine for any mountain glacier.”
“We’re quickly passing climate milestones that we thought were decades away,” he says, “and we chose the specific locations on these glaciers that we sampled with the implicit assumption that these glaciers are smaller than they’ve ever been in human history.”
The results of the study directly show that these glaciers have never retreated as much as they are today in the past 11,700 years – prior to this point, the entire planet was in a global ice age, and work by other research teams has shown that the tropics were colder at that time.
Although the study does not say so, Gorin agreed when asked that this means Andean glaciers have shrunk to their smallest size since at least the last interglacial period, about 130,000 years ago.
“I would be willing to bet everything you say that these glaciers are currently at their smallest since the last interglacial period is true,” he says, “but the limitations of the techniques we used to address this problem mean we can’t definitively prove that’s the case, so we don’t say so in the paper.”
“This is a shocking study.” Liam Taylor “Science now conclusively shows that Andean glaciers are in a state not seen since the Holocene epoch that began 11,700 years ago, and this is the direct result of climate-altering human activities,” researchers from the University of Leeds in the UK said.
Taylor said the retreat of glaciers is already affecting agriculture, drinking water supplies, sanitation and hydroelectric power in the region because the glaciers act as reservoirs, storing snowfall in the winter and releasing meltwater in the summer.
“Many of the glaciers in the region are now past ‘peak water level,’ meaning that the meltwater that provides freshwater downstream is drying up,” he said.
Tens of thousands of people have died in Peru over the past century from floods caused by lakes formed by retreating glaciers. Stephen Harrison Researchers from the University of Exeter in the UK have warned that more similar disasters are likely around the world as mountain glaciers retreat.
Climate models predict that mountain glaciers will lose more than 90 percent of their ice by the end of the century, leaving only a few small glaciers in the highest regions, he says.
The two galaxy clusters, known as MACS J0018.5+1626, contain thousands of galaxies each and are located billions of light-years away from Earth. As the clusters hurtled towards each other, dark matter traveled faster than normal matter.
This artist's conceptual illustration shows what happened when two massive clusters of galaxies, collectively known as MACS J0018.5+1626, collided. The dark matter (blue) in the clusters moves ahead of the associated hot gas clouds, or regular matter (orange). Both dark matter and regular matter feel the pull of gravity, but only the regular matter experiences additional effects like shocks and turbulence that slow it down during the collision. Image courtesy of W. M. Keck Observatory/Adam Makarenko.
Galaxy cluster mergers are a rich source of information for testing the astrophysics and cosmology of galaxy clusters.
However, the coalescence of clusters produces complex projection signals that are difficult to physically interpret from individual observation probes.
“Imagine a series of sand-carrying dump trucks colliding, and the dark matter would fly forward like sand,” says astronomer Emily Silich of the California Institute of Technology and the Harvard-Smithsonian Center for Astrophysics.
This separation of dark matter and normal matter has been observed before, most famously in the Bullet Cluster.
In this collision, hot gas can be clearly seen lagging behind dark matter after the two galaxy clusters push through each other.
The situation that occurred in MACS J0018.5+1626 is similar, but the direction of the merger is rotated about 90 degrees relative to the direction of the Bullet Cluster.
In other words, one of the giant galaxy clusters in MACS J0018.5+1626 is flying almost straight towards Earth, while the other is moving away.
This orientation gave the researchers a unique perspective to map the speeds of both dark and normal matter for the first time, and unravel how they separate during galaxy cluster collisions.
“Bullet Cluster makes you feel like you're sitting in the stands watching a car race, taking beautiful snapshots of cars moving from left to right on a straight stretch of road,” said Jack Sayers, a professor at the California Institute of Technology.
“For us, it's like standing in front of an oncoming car on a straight stretch of road with a radar gun and measuring its speed.”
To measure the velocity of ordinary matter, or gas, in galaxy clusters, the astronomers used an observational technique known as the kinetic Sunyaev-Zel'dovich (SZ) effect.
In 2013, they made the first observational detection of the kinetic SZ effect on an individual cosmic object, a galaxy cluster named MACS J0717.
The kinetic SZ effect occurs when photons from the early universe, or the cosmic microwave background radiation (CMB), are scattered by electrons in hot gas on their way to Earth.
Photons undergo a shift called the Doppler shift due to the movement of electrons in the gas cloud along the line of sight.
By measuring the change in brightness of the CMB due to this shift, astronomers can determine the speed of the gas clouds within the cluster.
By 2019, the study authors had made these motional SZ measurements in several galaxy clusters to determine the velocity of the gas, or ordinary matter.
They also measured the speed of galaxies within the cluster, which gave them an indirect idea of the speed of dark matter.
However, at this stage of the study, our understanding of the cluster orientation was limited.
All they knew was that one of them, MACS J0018.5+1626, was showing signs of something strange going on: hot gas, or regular matter, moving in the opposite direction to dark matter.
“We saw a totally strange phenomenon where the velocities were in opposite directions, which initially made us think there might be a problem with the data,” Prof Sayers said.
“Even our colleagues simulating galaxy clusters had no idea what was going on.”
Scientists then used data from NASA's Chandra X-ray Observatory to determine the temperature and location of the gas in the cluster, as well as the extent to which it is being bombarded.
“These cluster collisions are the most energetic events since the Big Bang,” Šilić said.
“Chandra will measure the extreme temperatures of the gas, which will tell us the age of the merger and how recently the galaxy cluster collision took place.”
The authors found that before the collision, the clusters were moving towards each other at about 3,000 kilometers per second, roughly 1 percent of the speed of light.
With a more complete picture of what's going on, they were able to work out why dark matter and normal matter appear to be moving in opposite directions.
They say it's hard to visualize, but the direction of the collision, combined with the fact that dark matter and normal matter separated from each other, explains the strange speed measurements.
It is hoped that more studies like this one will be conducted in the future, providing new clues about the mysterious properties of dark matter.
“This work is a starting point for more detailed studies into the nature of dark matter,” Šilić said.
“We now have a new type of direct probe that shows us how dark matter behaves differently from ordinary matter.”
Emily M. Silich others. 2024. ICM-SHOX. I. Methodology overview and discovery of gas-dark matter velocity separation in the MACS J0018.5+1626 merger. ApJ 968, 74; doi: 10.3847/1538-4357/ad3fb5
This article is a version of a press release provided by Caltech.
Is it in the way we live, laugh, love? Or is it our aversion to clichés? Deep inside each of us, there must be something that makes us human. The problem is, after centuries of searching, we haven’t found it yet. Maybe it’s because we’ve been looking in the wrong places.
Ever since researchers began unearthing ancient hominin bones and stone tools, their work has held the tantalizing promise of pinpointing the long-ago moment when our ancestors transformed into humans. Two of the most important fossil discoveries in this quest reach an important milestone this year: 100 years since the first “near-human” was found. Australopithecus Fossils have been discovered in South Africa that have upended previous ideas about human origins, and it’s been 50 years since the most famous fossil was found. Australopithecus Lucy, also known as humanity’s grandmother, emerged from the dusty hills of Ethiopia, and the two fossils have led researchers to believe they can pinpoint humanity’s Big Bang, the period when a dramatic evolutionary wave led to the emergence of humans. Homo.
But today, the story of human origins is much more complicated. A series of discoveries over the past two decades has shown that the beginning of humanity is harder to pinpoint than we thought. So why did it once seem like we could define humanity and pinpoint its emergence, thanks to Lucy and her peers? Why are we now further away than ever from pinpointing exactly what it means to be human?
The phrase “dining on earthworms” intrigues people in a variety of ways (whether or not they are intrigued in the first place). For historians, it can spark debates like this: Political rallies That happened in the German city of Worms in 1521. To nutritionists, the phrase can describe the work of scientists considering whether today's roughly 8 billion humans could all survive, if necessary, on a diet primarily of earthworms.
Henry Miller, James Mulhall, Lou Aino Pfau, Rachel Palm, and David Denkenberger, whom Feedback considers an all-star team in the earthworm nutrition community, recently devoured a mountain of data. After the meal, intellectually speaking, they said:Could harvesting earthworms significantly reduce global hunger in the event of a major disaster?” Published in the journal biomass.
The five researchers analyzed four techniques for efficiently capturing earthworms: digging and sorting, spraying with anthelmintics, making worm noises, and electric shocks.
They asked the “canned” (worm) question: Given the constraints of “scalability, climate-related collection barriers, and pre-consumption processing requirements,” could earthworms collected in these ways feed all of humanity? Their answer, in a word, is “no.”
Their 48-word response reads: “The authors are not aware of any studies on the human health effects of consuming diets high in harvested earthworms. However, in the authors' opinion, there is reasonable evidence that such diets may be harmful and therefore should not be recommended unless starvation is the alternative.”
Earthworm Meal
Miller, Mulhall, Pfau, Palm and Denkenberger are the latest pioneers in a long line of scientists who have come together to study earthworms' feeding habits.
Many others have focused on the feeding habits of the insects themselves.
Charles Darwin achieved some fame through his 1881 book, Formation of vegetable mold by the action of earthwormsNearly a century later, Christian Forchard and Peter Jummers wroteEarthworm diet: a study of the feeding guild of polychaetes” took up 92 pages. Annual Review of Oceanography and Marine Biology.
Forchard and Jumaz include a conversation-ending sentence that's worth memorizing and reciting if you want to impress at a party: “Alciopids are holoplanktonic animals with a muscular, eversable pharynx.”
Other scientists have studied what happens when insects are eaten, particularly by non-humans.
In 2002, Mary Silcox and Mark Teaford examined the teeth of several habitual earthworm eaters. They summarized their observations: Journal of Mammalogy,title”Insect diet: analysis of microwear on mole teeth” “.
“We measured microwear from the shear surfaces of mandibular molars. Parascallops Brewery (a hairy-tailed mole) Scapanus orarius “We compared the genes of (coast moles) with those of other small mammals, including tenrecs, hedgehogs, three species of primates and two species of bats.”
Some of the wear patterns on the mole's teeth “can plausibly be explained by interactions between the inner and outer teeth of the earthworm and the soil,” the researchers wrote.
Silcox and Teaford's mole teeth study may take on new importance if people on Earth choose to live a diet based primarily on earthworms, despite Miller and others' warnings.
Feedback has been received on the news regarding height requirements for certain courses at Vietnam National University’s School of Business Administration (HSB).
Deutsche Welle On July 2nd, the school announced that “this year's admission requirements are 1.58m or above for girls and 1.65m or above for boys,” because “the school aims to develop future leaders and excellent administrators” and “height is a determining factor, especially when it comes to leadership and self-confidence.”
The news report said that following public outcry, “HSB adjusted its admissions criteria” so that “the rule now applies to only one course – management and security.”
Are there schools or other institutions in the science, medical, or technology fields that have strict height requirements for students or employees? If so, please send us a document in Feedback with the subject line “Big/Small Careers.” Some job requirements reasonably specify that applicants must be physically able to use certain job-related equipment. Please do not send such requirements. We are seeking examples in Feedback where numbers, not needs, are prioritized.
Toilet Humor
Inspired by Feedback's collection of abandoned organisation slogans, Ken Taylor has been writing down slogans about abandoned things.
“I live in a very rural area. [the] UK – Cumbria. There are many isolated plots of land that are not connected to the sewer network and so rely on septic tanks, which need to be emptied regularly. I saw one such tanker truck carrying out its duties. The slogan on the side read “Move yesterday’s meal”. Nothing more to add…”
Marc Abrahams is the founder of the Ig Nobel Prize ceremony and co-founder of the journal Annals of Improbable Research. He previously worked on unusual uses of computers. His website is Impossible.
Do you have a story for feedback?
You can submit articles for Feedback by emailing feedback@newscientist.com. Please include your home address. This week's and past Feedback can be found on our website.
From black spheres swallowing people in downtown Seoul to murder on Mars to malevolent pigs, August has something for every sci-fi fan. New books from big-name authors like James S. A. Corey, Josh Malerman, and Neil Asher, as well as new stories from Mark Haddon (The Curious Incident of the Dog in the Night-Time We’ll start our August reading with Janina Mathewson’s story about an apocalypse experienced from a tiny island, followed by Miles Cameron’s vision of a city-sized “Great Ship” traversing the universe. Whatever your favorite genre of sci-fi, there’s plenty to choose from.
This detective story begins in downtown Seoul. A giant black sphere suddenly appears and sucks in Jong-soo’s neighbors. The sphere continues to swallow people, but attempts to stop it fail and it starts to split and multiply, causing panic all over the world. Meanwhile, Jong-soo goes out to look for his aged parents.
This apocalyptic tale takes place in a small island settlement called Black Crag. Sarah wakes up one morning to find the world quiet. No planes cross the sky and the radio is silent. When a silent, traumatized ferryman arrives, whispers of what really happened on the mainland begin to divide the villagers. It has been compared to Emily St. John Mandel’s Valkyrie. Station Eleven This is one of my favorite post-apocalyptic novels.
This is a standalone novel set in Asher’s Owner Universe. Earth is ruled by the “Ruthless Commission”, but when rebel mutant Ottangar is experimented on by Earth’s Inspectors, he discovers he can reach other worlds and meets evolved humans from the distant future. Can he destroy the Commission’s regime?
This looks like a lot of fun – a sci-fi story that spans generations, from Mars in 2034, when the first humans emerge on the Red Planet, to Mars in 2103, a place of division and fear.
Bestselling horror author Bird Box The latest horror film is set on a farm inhabited by a “strangely malevolent pig” named Pearl and her owner, Walter Copple. Walter has been terrified of Pearl for a long time, and as rumors spread throughout town, the locals begin to go mad.
This military science fiction work is Cameron’s Artifact Space I haven’t read “The Great Ships” but they look very interesting and I would like to read both. They are set in a world where Great Ships with city-sized crews transport goods through space and trade “Xenograss” with alien races. Malka M’Baro has always wanted to serve on one of them and now he has his spot. But something in the darkness of space is targeting the ships.
New Scientist Book Club
Do you love reading? Come join our friendly group of book lovers. Every six weeks, we delve into new and exciting titles and members get free access to our book excerpts, author articles and video interviews.
The debut novel features Raffi, a physicist who dreams of a parallel universe where he falls in love with a sculptor named Britt. He wishes he’d been brave enough to say hello to Britt as a child – what would have happened if he had? This question sends Raffi flying through strange alternate universes, but it all leads back to Britt.
It’s a collection of short stories that weaves together ancient Greek mythology and the modern world, exploring things like genetics, how we treat animals, etc. The Minotaur, for example, becomes a tale of maternal love and patriarchy. This is going to be fun, and Haddon is undoubtedly brilliant.
Bestselling Author spread The authors of the series, who write the novels under a joint pen name, have announced a new space opera in which the Calix Empire descends on the isolated human world of Anjin, where its inhabitants are massacred or abducted as prisoners. Dafydd, a scientist’s assistant, is captured along with his team, but will his skills help them escape their captors’ plans?
The punning title sets the stage for this comedy about an alien invasion in the town of Muddy Gap, where pie lover Denver Bryant witnesses a UFO exploding, but they seem to be the only ones who care, and the only one who takes them seriously is handsome new bartender Ezra, who keeps a record of the incident and the investigation on his pie blog.
Biohackers Charlie and Parker live in a near-future London where the climate has collapsed. The world is divided into three groups: the Greens who want to save the world, the Blues who want to do it while they can, and the Blacks who see no hope. When the two are hired by green activists for jobs ranging from robbery to murder, Charlie is reluctant, but Parker wants to take them on, believing they can still make a difference.
This debut collection of short stories about identity in Central America moves from the past to the future, exploring what we would do if we woke up to find our lives had changed forever. Characters range from mango farmers to cyborgs, and tackle everything from “threatening technology” to “unchecked bureaucracy.”
If your child is fascinated with spies, you’re in luck – there are many spy toy sets available. A love for secret agents indicates that your child is inquisitive and starting to show interest in exploration and technology. There are various toy sets on the market that can aid in developing these skills while providing entertainment and nurturing imagination.
Here are some recommended spy toys for curious kids.
The best spy toys and gear for inquisitive kids
KidzLabs Spy Science Secret Message Kit
This comprehensive toy kit from 4M is packed with everything needed to send secret messages. Kids can hone their spy skills with various items included, such as an invisible message writer, a Morse code torch, and materials to create a 20-page spy journal.
The kit also includes a developer, stick code, and message capsule for discovering secret messages, while the cipher wheel and secret code library aid in learning essential skills. A Super Spy ID card is also part of the package for kids to enjoy. It’s an interactive and educational way for kids to engage in a new interest.
Long Range LCD Screen Walkie Talkie
No spy kit is complete without communication devices. Walkie-talkies are ideal for accompanying your child on their adventures. They allow you to stay connected as they uncover secrets and even role-play a spy headquarters.
Toy Zee walkie talkies are designed with kids in mind, featuring a simple and lightweight design suitable for little hands. With a VOX feature for hands-free calling, these walkie talkies have 9 main channels for private communication, reducing the risk of eavesdropping by others on the same channel.
Thames & Cosmos Master Detective Toolkit
BrightMinds kids’ toys aim to make learning fun and accessible, and this kit from Thames & Kosmos introduces children to science and lab work. The detective toolkit includes tools and documentation for learning about crime scene investigation and analyzing evidence like fingerprints, footprints, and tire tracks.
SpyX MicroSpy Gear Set
This spy gear kit encourages kids to explore their surroundings. It includes a utility belt with 4 micro tools – a spy light, invisible ink pen, motion alarm, and micro listener – to elevate kids’ imaginations. Prepare to venture into the outside world with your child using their new gear.
LOGIBLOCS Secret Recorder Kit
The Secret Recorder kit from LOGIBLOCS helps children explore while developing STEM skills. This gadget allows kids to build 7 innovative systems, featuring a voice recorder, message box, light sensor, Morse code, and more to kickstart their tech projects.
A to Z 9300 Spy Set
This A to Z secret mission set brings kids as close as possible to being real-life spies. They can observe their family using spy glasses, binoculars, and periscopes while sending secret messages using a special transmitter. Suitable for children aged 5 and above.
Kasachoy Night Vision Goggles
These spy goggles feature two pop-out LED lights, allowing kids to see in the dark up to 25 feet away. The battery-powered lights emit a cool blue glow, providing a realistic night vision experience and igniting your child’s imagination.
When it comes to choosing gifts for teenagers, gift cards are often the go-to option. With new technology constantly emerging, it can be challenging to find products that are both worth buying and will be loved by your teen.
Our list features a variety of fantastic tech gifts for teenagers, from cutting-edge gadgets for amazing selfies to popular items that can transform a regular bedroom into the ultimate teen hideaway. These products cater to every budget and level of tech knowledge – you don’t have to be a tech expert to enjoy these innovative devices.
These tech gifts are truly inspiring.
If you know a teenager who’s into science, don’t miss out on these amazing science gifts for teens.
Best Tech Gifts for Teens
TP-Link Tapo Smart Wi-Fi Multi-Color Light Strip
Adding a color-changing LED light strip can instantly elevate a dull bedroom into a vibrant, multi-colored space. Perfect for adding a touch of excitement to a sleepover, gaming session, or just a relaxing night at home. This LED light strip may be one of the best tech gifts for teenagers.
Philips Hue Series Tapo is a well-known name in smart LED strips, and this version of Tapo is a great budget-friendly choice.
Setting up is easy – simply stick the strips on shelves, screens, or other bedroom furniture. The strips are five meters long and can be cut to any desired size. Use the Tapo app to select preset lighting moods, effects, and timers to automatically control the multicolored LEDs. It works over standard home Wi-Fi and is compatible with Alexa and Google Assistant for voice control.
For more gift ideas, check out our guide to the best sci-fi games.
Latest Philips Hue Lightstrip deals:
Tapo Light Strip Latest Deals:
Insta360 X3
At first glance, this small gadget may seem expensive, but its impressive features speak for themselves.
The Insta360 X3 features a 5.7K 360° camera with useful functions like image stabilization, horizon lock, and HDR mode. With the extended selfie stick, the camera intelligently edits your footage to provide a unique third-person perspective, almost like having your personal videographer.
Don’t miss out on the best instant cameras for more photo gift ideas.
While the camera captures the action in 360°, you have the freedom to choose the best angle for your video.
Additional features include:
8K quality 360° time lapse video
Automatically saves 15 or 30 seconds of footage before hitting the shutter button
Convenient automated editing and live 360° streaming allow viewers to see from every angle
Focus on a single person, animal, or moving object and keep it centered in the frame.
Waterproof up to 10m, extendable to 50m with a diving case (sold separately)
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Crosley Voyager Portable Turntable
A portable record player like the Crosley Voyager makes a fun and unique gift for teenagers. Music enthusiasts will appreciate having a stylish turntable in their room.
This turntable’s portability is a standout feature – easily pack it up and take your music with you to parties, vacations, and other gatherings.
Despite its vintage look, the turntable is equipped with modern features: Built-in stereo speakers and Bluetooth for streaming music from your phone, plus a headphone jack for private listening. The turntable also offers three speed settings for playing traditional records.
The Crosley Voyager is an affordable turntable option. If you’re unsure about it, explore our top record players currently available.
While you’re here, check out the best sunrise alarm clocks too.
Mini projector
A portable projector is a must-have for sleepovers or movie nights at home. Whether your teen has a TV in their room or not, this gadget will enhance their viewing experience with a projection size of up to 210 inches.
This is also perfect for PlayStation and Xbox enthusiasts.
While projectors can be pricey, this one offers a balance of affordability and quality. Highly rated by customers, it supports Full HD with 7500 lumens and allows you to choose your preferred projection size from 35 inches to 210 inches, from a distance of 3.7 feet from the wall.
Featuring built-in Hi-Fi speakers, it also has an audio-out port for connecting external speakers or headphones. Once set up, you can connect your phone, tablet, laptop, or gaming console to enjoy TV shows, movies, and photos (some devices may require an HDMI cable).
Explore our guide for the best projectors for your home for more options.
Ultimate Ears BOOM 3 Wireless Bluetooth Speaker
There are few speakers that deliver both style and sound quality, but the Ultimate Ears Boom 3 manages to do just that. With its unique “unicorn” appearance, this speaker stands out from the crowd. It also boasts impressive technical specifications.
The Boom 3 is fully waterproof, allowing you to play music underwater for 30 minutes, and it floats to the surface when released, making pool parties even more enjoyable. Moreover, if your recipient or their friends own other Ultimate Ears speakers, you can link up to 150 of them to synchronize music in one location.
This speaker delivers 360° sound and is made with a highly elastic material used in motorcycle jackets and firefighting gear. Ultimate Ears has conducted over 25 durability tests, ensuring it can withstand even the most energetic users.
The rechargeable battery provides up to 15 hours of playtime on a full charge. Power Up Dock for a seamless charging experience. For speaker options, explore our selection of portable speakers, shower speakers, or noise-canceling headphones.
Auraglow LED USB Wall or Tabletop Word Clock
Looking for a great gift under £25? Consider this unique clock from Auraglow. Instead of traditional numbers, this clock displays the time in 5-minute intervals. LEDs light up the relevant letters on a black panel to indicate the time.
The clock comes with a USB cable for connecting to various power sources, and you can add an adapter for more flexibility. It can be wall-mounted with a hanging slot or propped up on a desk or shelf thanks to its flat base.
If black isn’t your style, the clock is also available in copper. Explore our guides for the best wireless phone chargers, power banks, portable chargers, and charging stations for more useful tech ideas.
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Apexel 10-in-1 Cell Phone Camera Lens Kit
For Instagrammers, photographers, or selfie enthusiasts, a smartphone lens attachment is an ideal choice if you want to enhance your phone’s camera capabilities without investing in a new camera. This set, with 10 different lens attachments stored in a convenient pouch, is compatible with most smartphones and tablets, including iPhone, Samsung, Huawei, and Sony models.
The kit includes macro, wide-angle, and telephoto lenses, along with fun accessories like a fisheye lens, a star filter, a kaleidoscope attachment, and even a polarizing filter to reduce glare and reflections for sunny days.
Despite the focus on modern technology like virtual reality and artificial intelligence, it’s important not to overlook the simple joy of traditional entertainment. Remote-controlled helicopters, a classic favorite, now come with a range of new features to enhance the experience.
If you’re in the market for a remote control helicopter, check out our list of top models below. We’ve curated this list based on extensive research and user reviews to cater to every budget.
What to Consider When Buying an RC Helicopter?
With various helicopter options available, it’s crucial to think about these aspects before making a purchase:
Flight Stability is key, so look for helicopters equipped with a gyroscope or stabilization system.
Consider the range of the remote control, especially for outdoor flights, and the battery life to determine how long you can fly before recharging.
Easy access to replacement parts is essential in the event of a crash, which can happen while you’re still getting used to the helicopter.
Top RC Helicopter Models
Blade Nano RC Helicopter S3 RTF
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The Blade Nano S3-RTF is designed for indoor flying, featuring a lightweight yet durable carbon fiber frame and high-performance rotor blades for stable and agile flight.
Equipped with a six-axis stabilisation system and coreless motors, this helicopter offers power and versatility. It also includes a 2.4GHz DSMX transmitter, rechargeable battery, and spare parts available online.
Syma X9 Flying Car
This innovative hybrid can switch between driving and flying modes. During flight, it can perform acrobatic flips using its four blades and features a six-axis gyroscope for smooth flying.
The aircraft also includes red and green LEDs for better visibility in the dark, with a flight time of approximately 6 minutes and USB charging. It has dual-speed modes, extra blades, and a driver for emergencies.
Syma 2nd Edition S107 S107G
The Syma S107G is a mini indoor helicopter with a metal frame, built-in gyro stabilization, and precise three-channel control. Powered by a rechargeable lithium-polymer battery, it offers up to eight minutes of flight time and a 10-meter remote control range.
Laka Walkera V450D03
The Walkera V450D03 is an intermediate RC helicopter with a brushless motor for stability and agility. Its six-axis gyro stabilization system allows for precise maneuvers, with a carbon fiber frame for durability.
This helicopter features a three-bladed main and tail rotor, long flight times up to 16 minutes, and a 100-meter range with its 2.4GHz transmitter.
This SkyRover helicopter features a unique voice command system for firing missiles and controlling the flight. With eight plastic missiles, wireless headsets, and dual blade control, it offers an immersive experience.
Syma TF1001
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This medium-sized Syma helicopter boasts drone-like design and stunt capabilities, including 3D flips and rolls. It features altitude hold technology, dual-speed modes, USB charging, and a durable metal alloy body.
As the UK is currently experiencing another intense heatwave, many are questioning why the high temperatures feel particularly unbearable compared to other parts of the world.
Despite facing the same scorching sun and global warming trends, the heat in the UK seems to have a unique impact, leading some to wonder if there are other factors at play beyond just the temperature on the thermometer.
With temperatures reaching around 30°C, the British heatwave seems extreme when compared to climate change-induced wildfires in the US and Europe.
Before dismissing this as a common British complaint, it’s important to acknowledge that scientific evidence proves the severity of the heatwave in the UK.
“Heatwaves are subjective events, with different countries interpreting them based on people’s average expectations,” explained climate expert Professor Hannah Croke in an interview with BBC Science Focus.
Professor Croke emphasized that factors like humidity, wind speed, and temperature all play a role in how a heatwave is experienced and perceived by individuals.
Something is floating in the air
The UK’s island geography means that it is surrounded by water, which leads many to assume it would help cool down the country. However, the presence of cold water can actually have the opposite effect.
Meteorologists like Dr. Matthew Patterson explain that the UK’s climate, influenced by moist marine air, affects how heat is lost from the body through radiation, conduction, convection, and evaporation.
Evaporation plays a key role in cooling the body, but high moisture levels in the air can decrease its effectiveness. Wind speed also impacts evaporation, with strong winds aiding in cooling the body.
Indices like Feels Like Temperature and the Universal Temperature Index (UTCI) are used to predict how temperature, humidity, and wind speed will affect individuals during a heatwave.
UK homes not fit for purpose
The design of UK homes, coupled with the lack of standard air conditioning, poses a challenge during heatwaves. The majority of UK homes are not equipped to deal with extreme heat due to their design and age.
Historically, UK homes were built to allow sunlight in, which can lead to higher indoor temperatures. In contrast, European and American homes often have external shutters to block out heat.
As temperatures continue to rise due to climate change, the design and construction of UK homes will need to adapt to better cope with heatwaves. Lack of understanding on how to keep homes cool during hot weather exacerbates the issue.
About our experts
Hannah Croke OBE is a British hydrologist and Professor of Hydrology at the University of Reading. She has received numerous awards for her work in flood forecasting and risk management.
Matt Patterson is a Postdoctoral Research Fellow at the University of Reading, with interests in atmospheric dynamics, seasonal prediction, and climate change.
COVID-19 could have lasting effects on our mental and physical health
Alexander Davidov / Alamy
There is evidence that people who were hospitalized with COVID-19 during the first wave of the pandemic still have lower than expected cognitive abilities several years later, forcing them to change jobs.
“What we found is that the average cognitive impairment is equivalent to 10 IQ points, based on what you would expect given age etc.” Maxim Take At Oxford University.
His team looked at 475 British people who had been admitted to and discharged from hospital with COVID-19 up to March 31, 2021.. All of the participants had undergone psychiatric and cognitive evaluations six months after they were discharged, as part of a separate study. Take's team asked them to be reassessed two to three years later and found that, on average, symptoms of depression, anxiety, and fatigue had worsened. “More people get worse than they get better,” Take says.
Overall, those suffering from moderate to severe depression increased from 34% at six months to 47% at the second assessment, and those suffering from moderate to severe fatigue increased from 26% at the first test to 40%. Smaller changes were seen in the proportion of those suffering from moderate to severe anxiety, increasing from 23% to 27%.
It's not clear why so many people's symptoms worsened, but the team found that people whose symptoms were more severe in the initial tests tended to get worse over time. One participant said he'd had shortness of breath for three years and it was hard for him not to fall into depression, Take said.
The team also found that more than a quarter of participants changed jobs after hospitalization, half of whom said they did so because of poor health. The researchers found a strong association between changing jobs and declining cognitive function, but not with depression, anxiety, or fatigue. This suggests that many people are changing jobs because they can no longer cope with the cognitive demands of their previous jobs, rather than for a lack of energy or interest, Take says.
He acknowledges that the study has some major limitations: Only a fifth of those invited to take part actually did so, so it's not clear how representative the study is, and because participants weren't tested before being admitted to hospital, there's no baseline to compare it to, team members say. Paul Harrison also conducted at Oxford University. Instead, the conclusion that people lost 10 IQ points on average was based on what would be expected for people of the same age, sex and education level, British Intelligence Test.
Some young people are on their cell phones until late at night.
Monkey Business Images/Shutterstock
Two recent studies have linked “problematic smartphone use” among teenagers to increased symptoms of anxiety, depression, and insomnia. But is this really a problem, and how much, if anything, should we be worried about?
What is ‘problematic smartphone use’?
Researchers in both studies defined smartphone use as “problematic” if people lose a sense of control over their use, become addicted to their device at the expense of meaningful activities, and feel stressed when they are unable to use it. Use becomes problematic when it interferes with work, school, or relationships. John Elhai The researcher, from the University of Toledo in Ohio, was not involved in either study.
“Problematic smartphone use” is not recognized as a diagnosable condition by public health agencies such as the World Health Organization, the US Centers for Disease Control and Prevention, or the UK’s National Health Service.
Two studies found links to certain conditions, and the researchers said further research is needed to confirm whether smartphone use could be causing such health problems. Nicolas Kalk Researchers at King’s College London were involved in both studies.
What did the two studies find?
In one study, Kalk and his colleagues surveyed the smartphone use of more than 650 young people between the ages of 16 and 18. They used a “smartphone addiction scale,” which asks, for example, whether smartphone use blurs your vision or makes you feel irritable when you’re not holding your phone. The scale produces a score between 10 and 60, with a score above 30 considered problematic.
Nineteen percent of participants met the definition of problematic smartphone use, and these people were twice as likely to report moderate anxiety symptoms and almost three times as likely to report moderate depressive symptoms compared to their peers.
On average, problematic smartphone users spent 29 more minutes per day on Instagram and 22 more minutes on TikTok than non-problematic smartphone users. There was no association between problematic smartphone use and other apps such as Snapchat or WhatsApp.
The research team took into account factors that could have influenced the results, such as the amount of time participants spent on their smartphones each day. [also] The impact of [general] “Screen time is protective against the effects of problematic smartphone use, and screen time is not associated with anxiety or depression, but problematic smartphone use is,” Kalk said.
In a second study, a different team looked at smartphone use and symptoms of anxiety, depression, and insomnia in 69 young people aged 13 to 16. The researchers found that 44% of participants met the definition of problematic smartphone use, based on the same addiction scale.
When the research team resurveyed the 62 participants one month later, they found that increased severity of problematic smartphone use over that period was associated with greater symptoms of anxiety, depression, and insomnia.
Should you be worried about “problematic smartphone use”?
The studies are small and don’t prove that problematic smartphone use actually leads to poorer mental health in teenagers, he said. Sunny Shun Liu At Stanford University.
Kalk and Ben Carter Researchers from King’s College London who took part in both studies acknowledge that young people who are already experiencing these symptoms may be using their smartphones in more problematic ways than those without mental illness. “There may be a bidirectional link, but we don’t yet know if there is a causal relationship,” they said. Jay Olson At the University of Toronto, Canada.
For example, people with depression may be more likely to rely on their mobile phones than those without depression because they find comfort in communicating with loved ones, and people with insomnia may be more likely to turn to their mobile phones to stave off boredom in the middle of the night.
In the second study, participants who showed signs of problematic smartphone use were five times more likely to say they wanted to cut down on their device use than those without such use. The fact that these teens want to cut down on their phone use makes the results “both worrying and positive,” Carter said.
If you are worried, how can you cut down on your smartphone usage?
The first study found that 95% of people surveyed tried to limit their smartphone use: They said the most effective strategies were to occasionally put their devices on “do not disturb” mode, turn off notifications, and keep them in another room at bedtime.
Kalk said that rather than restricting teens’ cell phone use, parents and schools should talk to them about what aspects of smartphone use are beneficial and what aspects are harmful. For example, some teens reported that they enjoyed using their smartphones to stay in touch with loved ones, but also reported that smartphones were sometimes distracting.
A large-scale study has identified poor eyesight and high cholesterol as two new risk factors for dementia. The study claims that eliminating these factors, along with 12 other previously recognized factors, could prevent almost half of all dementia cases worldwide. However, some of these factors are difficult to eliminate, and genetics and advanced age remain the biggest risk factors for developing dementia.
“Dementia may be one of the most significant health threats facing the nation.” Gil Livingston “The possibility of changing this and significantly reducing the number of people suffering from depression is crucial,” said researchers from University College London. [this] disease.”
A 2020 study identified 12 potentially modifiable risk factors for dementia, including hearing loss, depression, smoking, high blood pressure, heavy alcohol consumption, obesity, air pollution, traumatic brain injury, diabetes, social isolation, physical inactivity and lack of education.
Livingstone and 26 other dementia experts from around the world updated the list based on the latest evidence, retaining the 12 risk factors but adding two new ones: high levels of low-density lipoprotein (LDL) “bad” cholesterol before age 65 and untreated vision loss in later life.
The researchers included high LDL cholesterol based on several new findings, including: Analysis of 17 studies The study followed around 1.2 million British participants under the age of 65 for over a year.
The results showed that for every 1 millimole per liter (mmol/L) increase in LDL cholesterol, the incidence of dementia increased by 8 percent. In another study of similar size, High LDL cholesterol (above 3 mmol/L) has been linked to a 33% increased risk of dementia, on average, and this risk is most pronounced in people who had high LDL cholesterol in midlife. “So it really does matter how long you have it,” Livingston says.
The researchers suggest that this association may mean that excess cholesterol in the brain increases the risk of stroke and contributes to dementia. Cholesterol has also been linked to the buildup of beta-amyloid protein plaques in the brain, which is linked to Alzheimer's disease.
Untreated vision loss can: Analysis of 14 studiesThe study, which involved more than 6.2 million older adults who were initially cognitively healthy, showed a 47% increased risk of developing dementia over 14.5 years. In another analysis, the risk The decline in vision was mainly due to cataracts and complications from diabetes. [loss] “There's a risk because you're reducing cognitive stimulation,” Livingston said, even though some research suggests that such stimulation may make the brain more resilient to dementia.
The researchers then used their model to estimate what percentage of dementia cases worldwide could be prevented if each of 14 modifiable risk factors were eliminated. They found that hearing loss and high cholesterol had the greatest impact, each contributing about 7 percent of dementia cases, while obesity and excessive alcohol consumption had the least impact, each contributing 1 percent. If all factors were eliminated, the team estimated that about 45 percent of dementia cases could be prevented.
But just because these factors are associated with dementia doesn't mean they cause it, he said. Dylan Williams“So even if we target interventions at them, they may not prevent as much disease as we would hope,” said researcher David L. Schneider of University College London, who was not involved in the report.
These estimates are only population averages and don't capture individual-level risk, Williams says. So removing all factors from your life wouldn't necessarily halve your risk of dementia, which is heavily influenced by genetics and age. Eliminating many of these risk factors, like air pollution or lack of education, would also require public health interventions rather than individual changes, Williams says.
Scientists have widely accepted that complex life first appeared on Earth around 635 million years ago (during the Ediacaran Period). However, an international team of paleontologists from Cardiff, Toulouse and Poitiers universities and China Nonferrous Metals (Guilin) Geological Mining Co., Ltd. has discovered evidence of a much older ecosystem more than 1.5 billion years ago in the Franceville Basin near Gabon on the Atlantic coast of Central Africa.
Artist's impression of a lobe-like macrofossil that lived in a shallow inland sea formed by the collision of two continents 2.1 billion years ago. Image by Abderrazak El Albani, University of Poitiers.
“The availability of phosphorus in the environment is thought to have been a key factor in the evolution of life on Earth, particularly in the transition from simple single-celled organisms to complex organisms such as animals and plants,” said Dr Ernest Chi-Ful, from Cardiff University.
“We already know that elevated marine phosphorus and oxygen concentrations in seawater are linked to an evolutionary event about 635 million years ago.”
“Our study adds an even older event to the record, going back 2.1 billion years.”
Scientists have widely debated the validity of the fossils of megafauna from the Ediacaran period, the oldest of their kind in the geological record.
But Dr Chi Hulu and his colleagues identified a link between changes in the environment before their emergence and increased nutrients, which may have triggered their evolution.
Geochemical analysis of marine sedimentary rocks dating back 2.1 billion years has shed new light on this unusually large fossil assemblage in the Franceville Basin.
A 2.1 billion year old lobe-like macrofossil from the Franceville Basin. Image by Abderrazak El Albani, University of Poitiers.
“We think that after the Congo and San Francisco cratons collided and sutured together, undersea volcanoes further restricted water in this area and even cut it off from the global oceans, forming a nutrient-rich shallow inland marine sea,” Dr Chi-Hulu said.
“This created a localized environment of abundant cyanobacterial photosynthesis for extended periods, leading to oxygenation of local ocean waters and the generation of large food resources.”
“This would have provided enough energy to fuel the increased body size and more complex behaviors seen in the primitive, simple animal-like life forms found in fossils from this period.”
However, the restricted nature of this body of water, combined with the harsh conditions that existed beyond this environmental boundary for billions of years afterward, likely prevented these enigmatic life forms from colonizing the entire planet.
The study suggests that these observations may indicate a two-stage evolution of complex life on Earth.
Step 1 followed the first significant increase in atmospheric oxygen content 2.1 billion years ago, and step 2 followed a second increase in atmospheric oxygen levels about 1.5 billion years later.
“While the first attempt failed to catch on, the second attempt led to the creation of the diversity of animals seen on Earth today,” Dr Chi Hulu said.
of result Published in the journal Precambrian Studies.
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Ernest Chi-Ful others2024. Hydrothermal seawater eutrophication triggers a localized macrobiological experiment in the 2100 Ma Paleoproterozoic Franceville Subbasin. Precambrian Studies 409: 107453; doi: 10.1016/j.precamres.2024.107453
The basic idea of a warp drive is that rather than directly exceeding the speed of light in a local frame of reference, a “warp bubble” contracts space-time in front of it and expands it behind it, allowing travel over distances faster than the speed of light as measured by a distant observer.
Craft othersWe propose a formalism for the dynamical study of warp drive spacetime and generate the first fully consistent numerical relativistic waveforms for the collapse of a warp drive bubble.
Although warp drive has its origins in science fiction novels, according to Miguel Alcubierre, an astrophysicist at the University of Wales, warp drive is explained in detail in the general theory of relativity. Be the first to propose A space-time metric that supports faster-than-light travel.
Real-world implementation has many practical barriers, such as the need for a special type of material that has negative energy, but computationally, given an equation of state describing the material, it is possible to simulate changes over time.
In a new study, theoretical astrophysicists investigated the signatures that could result from a “containment failure” of a warp drive.
“Warp drives are purely theoretical, but they are clearly described in Einstein's general theory of relativity, and numerical simulations allow us to explore the effects of warp drives on space-time in the form of gravitational waves,” said Dr Katie Clough, researcher at Queen Mary, University of London.
“The results are fascinating: the warp drive collapse produces a unique gravitational wave burst — a ripple in space-time that can be detected by gravitational wave detectors that typically target merging black holes and neutron stars.”
“Unlike chirp signals from merging objects, this signal is a short, high-frequency burst that would be undetectable by current detectors.”
“But there may be higher frequency devices in the future, and although the money hasn't been put into those devices yet, the technology exists to build them.”
“This raises the possibility that we could use these signals to look for evidence of warp drive technology, even if we can't build it ourselves.”
“In our study, the initial shape of spacetime is the warp bubble described by Alcubierre,” said Dr Sebastian Kahn, a researcher at Cardiff University.
“Although we demonstrate that an observable signal could, in principle, be found by future detectors, the speculative nature of this work is not sufficient to drive instrument development.”
The authors also take a detailed look at the energy dynamics of a collapsing warp drive.
In this process, waves of negative energy matter are released, followed by alternating waves of positive and negative energy.
This complex dance results in a net increase in energy throughout the system and, in principle, could provide another signature of collapse if the emission waves interacted with ordinary matter.
“This is a reminder that theoretical ideas can inspire us to explore the universe in new ways,” Dr Clough said.
“I'm skeptical that we'll see anything, but I think it'll be interesting enough to be worth a look.”
“For me, the most important aspect of this work is the novelty of accurately modelling the dynamics of negative energy space-time and the possibility that the technique can be extended to physical situations that could help us better understand the evolution and origin of the universe or processes at the centre of black holes,” said Professor Tim Dietrich of the University of Potsdam.
“While warp speed may still be a long way away, this research is already pushing the boundaries of our understanding of extra-dimensional space-time and gravitational waves.”
“We're going to try different models of warp drive to see how that changes the signal.”
Katie Clough othersThe year is 2024. A phenomenon no one has seen before: gravitational waves caused by warp drive collapse. Open Astrophysics Journal 7;doi:10.33232/001c.121868
Their ambitious mission was initially planned for just one week, but now, after 56 days on the International Space Station, the two NASA astronauts remain in orbit, awaiting a safe return journey in the Boeing spacecraft.
The troubled Starliner capsule is facing issues with its propulsion system, including a leak in its helium and failure of five thrusters. Despite the leak being detected before launch, mission managers believed it wouldn’t impact the safety of the astronauts or the flight.
Over the weekend, NASA and Boeing engineers conducted a crucial “hot fire test” of the Starliner, which is set to carry veteran astronauts Sunita Williams and Butch Wilmore on its first crewed flight on June 5.
The test involved firing 27 of the capsule’s 28 jets in less than 1.2 seconds while evaluating their performance and checking for helium leaks. Preliminary results from the test were positive.
In a blog post published by NASA on Tuesday, it was stated that all thrusters performed well during the test.
NASA confirmed that the propulsion system of the Starliner remains stable, and the helium leak rate is not significant enough to endanger the return to Earth. The agency plans to recheck the system before the capsule separates from the space station.
A high-temperature burn test was also conducted with astronauts Wilmore and Williams inside the Starliner capsule as part of preparations for the return journey. The thrusters play a vital role in maneuvering the spacecraft during docking and undocking from the space station.
Overall, the progress made during the hot fire test is a positive sign for the upcoming crewed flight of the Starliner and the safe return of the astronauts.
Is it in the way we live, laugh, love? Or is it our aversion to clichés? Deep inside each of us, there must be something that makes us human. The problem is, after centuries of searching, we haven’t found it yet. Maybe it’s because we’ve been looking in the wrong places.
Ever since researchers began unearthing ancient hominin bones and stone tools, their work has held the tantalizing promise of pinpointing the long-ago moment when our ancestors transformed into humans. Two of the most important fossil discoveries in this quest reach an important milestone this year: 100 years since the first “near-human” was found. Australopithecus Fossils have been discovered in South Africa that have upended previous ideas about human origins, and it’s been 50 years since the most famous fossil was found. Australopithecus Lucy, also known as humanity’s grandmother, emerged from the dusty hills of Ethiopia, and the two fossils have led researchers to believe they can pinpoint humanity’s Big Bang, the period when a dramatic evolutionary wave led to the emergence of humans. Homo.
But today, the story of human origins is much more complicated. A series of discoveries over the past two decades has shown that the beginning of humanity is harder to pinpoint than we thought. So why did it once seem like we could define humanity and pinpoint its emergence, thanks to Lucy and her peers? Why are we now further away than ever from pinpointing exactly what it means to be human?
A new study led by Western Washington University suggests that sister city relationships have been around for longer than we thought.
Jack H. McBride and Tesla A. Monson conducted a comprehensive study of primate offspring numbers using life history data from 155 primate species and offspring numbers from an additional 791 mammal species. Image by Jason Brougham.
“Nearly all primates give birth to a single litter,” say Tesla Monson, a professor at Western Washington University, and Jack McBride, a doctoral student at Yale University.
“However, some genera, such as marmosets, tamarins, lemurs, lorises, and galagos, regularly give birth to twins or triplets.”
“Although humans most often give birth to singletons, twin pregnancies occur naturally at a rate of approximately 1.1-1.5% worldwide.”
“Advances in assisted reproductive technology have increased twin birth rates to around 3% in some areas over the past 50 years.”
“There is an urgent need to understand the impact of twins on pregnancy, mothers, and newborns.”
In this study, the authors collected data on reproduction and body size from nearly 1,000 different mammalian species to investigate the evolutionary history of twinning in primates.
The traits they analyzed included offspring size (number of offspring), gestation period, body size, and lifespan.
Contrary to previous assumptions, the analysis demonstrates that the earliest primates likely gave birth to twins.
The researchers also found that birth size and gestational age (the length of pregnancy) were closely related.
“Animals that give birth to more pups on average tend to have shorter gestation periods,” Professor Monson said.
“This also applies to humans. In the United States, full-term twins are considered to be born at 38 weeks, not 40 weeks, and many twins are born earlier than that.”
“This may be related to maternal energy limitations.”
“The next step is to look more broadly at offspring number across mammals and see which other reproductive, brain, and body size traits are associated with twinning.”
“We are particularly interested in understanding the relationship between twinning and tooth morphology.”
Shackleton Crater on the south pole of the moon is an area in permanent shadow
LROC/Shadowcam/NASA/KARI/ASU
A backup of Earth-based life could be safely stored in a permanently dark spot on the Moon’s surface, without the need for power or maintenance, and could potentially be restored if life becomes extinct.
Mary Hagedorn Researchers at the Smithsonian’s National Zoo and Conservation Biology Institute in Washington, DC, and their colleagues proposed building the lunar biorepository as a response to extinctions occurring on Earth.
The plan has three main goals: to protect the diversity of life on Earth, to preserve species that may be useful for space exploration, such as those that can provide food or biological materials for filtration, and to preserve microorganisms that may be needed in the future to terraform other planets.
Hagedorn said the team wanted to identify a place that wouldn’t require people or energy to store cryogenically frozen living cells at temperatures below minus 196 degrees Celsius, the temperature at which nitrogen becomes liquid and all biological processes stop.
“There’s no place on Earth cold enough to put passive storage, which has to be kept at minus 196 degrees Celsius, so we thought about space or the moon,” Hagedorn said.
She said the team chose the lunar south pole because of a deep crater with a cold area that’s permanently in shadow. Burying the samples about two meters below the surface would also protect them from radiation, she said.
Previous attempts to build safe biovaults have met with mixed success. The Svalbard Global Seed Vault in Norway is located in the Arctic and was built to be permanently kept at or below -18 degrees Celsius by the surrounding permafrost, but climate change and rising temperatures threaten its long-term safety.
Biorepository facilities in other parts of the world, especially those located close to cities, are human-power dependent and vulnerable to geopolitical upheaval.
Andrew Pask David B. Schneider, a researcher at the University of Melbourne in Australia who is building an Australian seed repository, is enthusiastic about the idea: “We want to look at the same samples in the same facility to ensure their safety, and at the moment the Moon seems like the safest place,” he says.
but Rachel Lapin A researcher from Monash University in Melbourne says there are many challenges and disadvantages to using the Moon, especially the difficulty of accessing it to add or remove samples. She says it might be better to store samples on Earth with lots of redundancy, so that if one repository fails, others are available.
“I want to see compelling evidence that storage will be available if needed,” she said.
Even if this moon vault is not used, Alice Gorman Researchers at Flinders University in Adelaide, Australia, see value in preserving human remains in space, and believe they might one day be accessible to extraterrestrial civilizations.
“Whether it’s cryogenically frozen biological tissue or DNA, or the full text of Wikipedia stored on a high-density nickel disk, the repository will be similar to the Voyager Golden Records,” Gorman says, referring to the metal disks containing humanity’s story attached to the spacecraft currently leaving the solar system.
After months of speculation about whether the water in the Seine was clean enough for Olympic athletes to compete in, authorities have determined after last-minute testing that the river’s water is safe for swimming.
After tests of the Seine’s water quality came back positive on Wednesday morning Paris time, the men and women will swim in back-to-back races as part of a triathlon, starting at 8 a.m. local time. The men’s race was originally scheduled for Tuesday but was postponed after the Seine’s water failed tests.
“The latest water quality analysis results, received at 3:20 a.m., have been assessed by World Triathlon as meeting the standards and clearing the way for the triathlon to go ahead,” World Triathlon, the organisers and governing body of the Paris Games, said in a statement.
People cool off under a bridge over the Seine during the sweltering heat at the Paris Olympics on Tuesday. Maya Hitidji/Getty Images
After the race, Team USA triathlete Taylor Spivey said he “swallowed a ton of water” during the triathlon swim in the Seine, a river that has historically been so polluted that swimming in it has been illegal for the past century.
Spivey, who finished 10th in the race, told NBC News that his biggest concern wasn’t the water quality, but the “exceptional” and “shocking” strength of the current, which he said was so strong that the race could have been canceled.
“The flow was incredible,” she said. “It felt like I was on a treadmill in one place.”
When asked about the quality of the water, she added, “I’ve been taking lots of probiotics for the past month. We’ll see how it goes.”
Cassandre Beaugrand of France won the gold medal ahead of Julie Delong of Switzerland, who took the silver medal, while Beth Potter of Great Britain took the bronze medal.
The Seine’s water quality has caused a bit of a stir in the run up to the events, as organizers rush to clean up the polluted waterway for prime-time attention. For months, France has been testing samples from the river for the presence of pathogens such as E. coli and enterococcus. High levels of E. coli put swimmers at risk of developing gastrointestinal illness.
The Seine has not passed these tests after wet weather, when storms can send runoff and sometimes sewage into the river.
Swimming in the Seine has been banned for more than a century because it was deemed too polluted, but the city of Paris led a $1.5 billion effort to clean up the river and strengthen waste-treatment systems ahead of the Olympics.
As the first event approached, organizers were hoping for sunny weather that would reduce overall pollution and allow ultraviolet light to inactivate some bacteria.
But the weather rarely cooperated.
last year, Test Event Triathlon rehearsals were canceled due to concerns about water quality after the rains.
The opening ceremony, which included a boat parade on the Seine, took place in pouring rain on Friday, which continued into Saturday.
Pollution from the rain forced organisers to cancel two days of swimming training on Sunday and Monday, then postpone the men’s triathlon originally scheduled for Tuesday morning.
There were no spectators at the swimming venue for the Olympic triathlon along the Seine river in Paris on Tuesday. Thibaut Moritz/AFP – Getty Images
“I’m just trying to focus on what I can control,” U.S. triathlete Kirsten Kasper told NBC News on Tuesday. “We swim in a lot of cities and water quality is often an issue, but I just have to trust that the race organizers are doing the testing and doing what it takes to make sure we’re safe.”
Water experts said the difficulty of keeping the Seine clean enough could draw attention to a broader problem of environmental pollution shared around the world.
“In large cities, it’s very difficult to control the amount of human waste that you see,” said Katie Graham, an assistant professor in the Georgia Institute of Technology’s College of Engineering. “The public assumes that a lot of these problems have been completely solved, but that’s by no means the case.”
NBC News is a unit of NBCUniversal, which owns U.S. media rights to the Olympics through 2032, including the 2024 Paris Games, which begin July 26.
Evan Bush reported from Seattle and Alexander Smith from Paris.
Studies have found that wildfire smoke can have adverse effects on brain health.
New research suggests that increased exposure to smoke may increase the risk of dementia.
As wildfires become more frequent and intense due to climate change, more people are being exposed to smoke and the associated health risks.
Parts of California, Oregon and Montana have been hit by several massive wildfires, including the Park Fire in Northern California, the fifth-largest in state history, and air pollution has reached unhealthy levels.
Smoke from wildfires can travel hundreds, even thousands, of miles, making it a danger to people nearby as well as those far away.
The fine particles in the smoke are not only bad for your lungs, but a series of studies in recent years have shown that they also have a negative impact on brain health, increasing the risk of dementia, cognitive impairment and mental health problems.
“Much of the research on wildfire smoke has historically focused on the lungs and the heart,” said Stephanie Cleland, an assistant professor at Simon Fraser University who studies the health effects of wildfire smoke. “It's only recently that we've seen a focus on cognitive function and brain health.”
Adding to this body of evidence is a study presented Monday at the Alzheimer's Association International Conference suggesting that wildfire smoke may increase the likelihood of a dementia diagnosis.
The study analyzed health records of more than 1.2 million Southern California adults aged 60 and older from 2009 to 2019.
The researchers looked at where people lived and their exposure to fine particles from wildfire smoke and other pollutants, and found that for every extra microgram per cubic meter of fine particulate matter from smoke that participants were exposed to over a three-year period, their odds of developing dementia increased by 21%.
In contrast, a similar increase in exposure to fine particulate matter from other sources, such as cars and factories, was associated with a 3% increased odds of developing dementia.
Study author Dr. Holly Elser, a neurology resident at the Hospital of the University of Pennsylvania, said the evidence is still preliminary but supports that chronic exposure to wildfire smoke contributes to cognitive decline.
But, she said, “the threshold at which wildfire smoke begins to pose a risk to dementia is unclear.”
a A study published in August Similarly, higher exposure to fine particulate matter from a variety of sources, including wildfires, was also found to be associated with higher incidence of dementia.
Climate change is making wildfires more frequent and more intense, and it is also increasing people's exposure to smoke. Between 2003 and 2023, the frequency of major wildfires is expected to more than double, Recent research has shown that.
Scientists believe that wildfire smoke affects the brain because the tiny particles it contains can penetrate the barrier between the bloodstream and the brain, causing inflammation in the central nervous system. The particles can also travel directly from the nose to the brain, which can affect people's ability to think, learn, and remember.
Dementia isn't the only potential impact. Research in 2022 Adults who had recently been exposed to wildfire smoke performed worse on brain-training games that measure abilities such as memory, attention, flexibility, processing speed and problem-solving skills, a study has found.
“People's alertness is significantly reduced within hours to days of exposure to wildfire smoke,” said Cleland, one of the study's authors.
other A study published in the same year Exposure to wildfire smoke during the school year has been shown to lower students' test scores compared to smoke-free years.
“The more smoke you're exposed to, the worse your test scores are,” said Marshall Burke, a co-author of the study and an associate professor of global environmental policy at Stanford University. “The impact on individual students is probably pretty small, but when you add it up across students and across schools, it adds up to a pretty significant overall learning loss.”
But Mr Burke said he had doubts about the dementia study findings published this week because wildfire smoke and other pollution “cannot be equated”.
Elser acknowledged that many questions remain about how smoke affects the brain — for example, it's unclear whether smoke causes dementia in healthy people or only in those who are already at risk.
“That's a really interesting question as to whether this is creating new cases of dementia that never would have occurred before, or whether it's simply hastening the onset of clinically evident dementia,” she said.
Other questions remain about the relationship between wildfire smoke and mental health. February Survey Exposure to smoke from wildfires in the western United States has been linked to increased emergency room visits for anxiety. depression and Psychosis like schizophrenia.
Elser said wildfire smoke can change the neurochemistry in people's brains, which can lead to depression and anxiety, but it's also possible that the anxiety and stress of experiencing and living through a wildfire can independently lead to mental health issues.
Other health effects of wildfire smoke are fairly well understood: Scientists have known for decades that inhaling smoke particles can travel deep into the lungs or enter the bloodstream, increasing the risk of asthma, stroke, heart attack, lung cancer, and low birth weight in newborns.
Cleland said it's not just people in fire-prone areas of the U.S. who have to worry about these risks, as the Canadian wildfires that blanketed parts of the Midwest and Northeast in smoke last summer showed.
“Last summer completely changed our discussion of who is exposed to wildfire smoke,” she says. “Oregon, California, Washington and British Columbia are actually getting a lot of wildfire smoke, but that doesn't mean places like the northeastern U.S. and Ontario aren't affected.”
To reduce exposure to wildfire smoke, experts recommend that people living in areas with high levels of wildfire smoke: Air Quality Index Reading If your count is over 100, avoid outdoor activities, close all windows, run indoor air purifiers, and wear an N95 mask if you must go out.
I lost to a cyborg. When I played the online game WebGrid, using my finger on my laptop’s trackpad to click squares that appear unpredictably on a grid, I was able to beat him at 42 beats per minute. When Noland Arbaugh, a self-described cyborg, played the game, using a chip implanted in his brain to send telepathic signals to a computer, his speed was 49.
Arbaugh was paralyzed from the neck down in 2016. In January, he became the first person to be surgically implanted with a chip made by Neuralink, a company founded by Elon Musk. Since then, Arbaugh has been able to use his mind to control his phone and computer, surf the web, and play games. civilization And chess.
But Neuralink is not the only company using brain-computer interfaces (BCIs) to blend the human brain with machines. Thanks to a series of trials, many people paralyzed by spinal cord injuries, strokes and movement disorders are regaining lost abilities. These successes have surprised some researchers, says Jamie Henderson, a neurosurgeon at Stanford University in California. “It’s been an incredible advance.”
Where that will take us remains to be seen. Musk recently mused about developing bionic implants that could compete with artificial superintelligence. Others see deeper implications: “In the future, we will be able to manipulate human perception, memory, behavior and identity,” says Rafael Yuste of Columbia University in New York.
But while BCIs are undoubtedly impressive, as Arbaugh’s WebGrid scores show, the relationship between brain activity, thoughts, and behavior is incredibly complex. Memory…
First names are social tags that are attached to us early in life. Previous studies have shown that an individual's facial appearance is indicative of their name. A new study explores the origins of this face-name matching effect – whether names are given based on innate facial features or whether an individual's facial appearance changes to match their name over time. Findings using both humans and machine learning algorithms show that while adults show a match between facial appearance and name, this pattern is not seen in children or in children's faces digitally aged to an adult appearance.
Zwebener othersThey investigated the possibility of a self-fulfilling prophecy effect, whereby an individual's facial appearance over time begins to resemble the social stereotype associated with their name. Image credit: Zwebner others., doi: 10.1073/pnas.2405334121.
“George Orwell famously said, 'By the time you're 50, everyone has a suitable face,'” said Reichman University researcher Yonat Zwebner and his colleagues.
“Research supports Orwell's observations and suggests that changes in facial appearance over the years may be influenced by a person's personality and behaviour.”
“Our current study aims to explicitly test developmental aspects of facial appearance by focusing on social processes by taking advantage of a recently identified effect, the face-name congruency effect. The face-name congruency effect suggests that names can be manifested in the appearance of a face.”
In the study, the authors asked 9- to 10-year-old children and adults to match people's faces with names.
The findings revealed that both children and adults correctly matched adult faces to their corresponding names at rates well above chance.
However, when it came to children's faces and names, participants were unable to make accurate associations.
In another part of the study, a large database of images of human faces was fed into the machine learning system.
The computer recognized that facial representations of adults with the same name were significantly more similar to each other than to facial representations of adults with different names.
Conversely, no significant similarities were found when comparing children with the same name to children with different names.
The researchers concluded that the similarities between people's faces and names are the result of a self-fulfilling prophecy.
Facial appearance changes over time to conform to the social stereotypes associated with names.
These stereotypes can form in a variety of ways, such as when a name is associated with a famous person or because of the connotations that biblical names have.
“Our study highlights the broader importance of this surprising effect – the profound influence of social expectations,” Dr Zwebner said.
“We have demonstrated that social construction, or structuring, does in fact exist, something that has been almost impossible to verify empirically until now.”
“Social constructs are so powerful that they can affect how people look.”
“These findings may suggest the extent to which other personal factors, such as gender and ethnicity, that may be even more important than a name, may shape a person's personality as they grow up.”
of result This month is Proceedings of the National Academy of Sciences.
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Yonat Zwebner others2024. Does a name shape the appearance of a face? PNAS 121 (30): e2405334121; doi: 10.1073/pnas.2405334121
If you’ve been browsing the internet recently, you’ve likely come across advertisements for Lionsman Mushroom supplements that claim to enhance health and prevent illness. But are these claims and products scientifically supported, or are they just a passing trend?
What exactly is a Lionsman mushroom?
The lion’s mane mushroom, scientifically known as Yamabushitake mushroom, is a sizable, hairy edible mushroom with a sweet taste and soft texture. It is used in gourmet cuisine and has a lengthy history in traditional medicine, attracting attention from both Western scientists and modern marketers.
There have been numerous studies on Lionsman mushrooms, with at least 410 research papers published in the last decade. However, only about a quarter of these studies have been conducted on humans, with the rest utilizing model systems like rodents or cell cultures. There have been a total of seven human clinical trials to date.
Is Yamabushitake good for your health?
Heart Health
Around one in three adults in the UK suffers from high blood pressure, and elevated cholesterol levels increase the risk of cardiovascular diseases. Lionsman extract has been studied for its potential to improve blood lipid levels, reduce oxidation, and possibly act as an anticoagulant.
Diabetes
Research suggests that Lionsman mushrooms may help control blood sugar levels, but this has only been demonstrated in rodents and cell studies, not in humans, especially those with diabetes.
Cancer Prevention
Studies have identified substances in lion’s mane mushrooms that may inhibit the growth of various cancer cells. However, more research is needed to determine if these effects translate to human consumption.
Mental Health and Cognition
Studies have shown that Lionsman extract can promote nerve cell growth, reduce oxidation and inflammation, and improve brain health. Small-scale studies have indicated potential benefits for memory and cognitive function.
Immunity and Inflammation
Lionsman compounds have been shown to have antioxidant and anti-inflammatory properties, but their effects on immunity in humans are yet to be fully understood.
Supports Gastrointestinal Health
Lionsman mushrooms have shown promise in limiting the growth of harmful bacteria and reducing the severity of gastrointestinal disorders in animal models. Human studies are still ongoing to confirm these effects.
So, can Lionsman mushroom supplements be beneficial for humans?
Most Lionsman products on the market focus on extracts, capsules, and powders, as these are easier to study than the whole mushroom. Dosage recommendations are challenging to determine due to the variability in products and the lack of conclusive data.
Are there any side effects?
Lionsman supplements are generally well-tolerated but may cause gastrointestinal upset, nausea, and skin rashes. It is important to consult with a healthcare provider before taking them, especially if you are on other medications.
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