Millions of kids take melatonin but doctors are raising red flags

Melatonin has quickly become one of the most widely used sleep aids for children around the world. Its popularity is largely driven by the belief that it is a natural and easily accessible solution for insomnia. However, new research suggests that its rapid growth in use has moved faster than the scientific understanding of how safe and effective it truly is for children over the long term.

Melatonin appears to provide clear benefits for sleep difficulties in children with neurodevelopmental conditions. Yet for children without these conditions, strong evidence remains limited. Researchers are also concerned about inconsistent dosing in over the counter products, use without medical supervision, and a growing number of accidental ingestions. Taken together, these concerns point to the need for more caution, stronger regulation, and clearer evidence based guidance when melatonin is used to address sleep problems in children.

Why Families Are Turning to Melatonin

Sleep difficulties are becoming increasingly common among children and teenagers. Poor sleep can influence emotional regulation, cognitive development, and overall health. As parents look for quick and convenient solutions, melatonin supplements have become widely used because they are easy to obtain, often come in child friendly forms, and are widely perceived as a safe alternative to prescription medications.

Despite that perception, melatonin is actually a hormone that affects more than just sleep cycles. It plays roles in regulating the immune system, metabolism, and reproductive processes. Research on melatonin use in children is still uneven. Many studies only examine short term outcomes or focus on specific clinical populations. Because of these limitations, researchers say there is an urgent need to carefully evaluate the safety, effectiveness, and appropriate use of melatonin in pediatric care.

Review Examines Global Melatonin Use in Kids

A narrative review published in World Journal of Pediatrics, by researchers at Boston Children’s Hospital explored the rapid rise of melatonin use among children and adolescents worldwide. The review analyzed clinical evidence related to melatonin’s effectiveness, safety profile, and patterns of real world use.

Researchers found a clear mismatch between the widespread use of melatonin and the limited amount of long term scientific data available. The review also highlighted concerns about inappropriate use, inconsistent product quality, and the lack of strong regulatory oversight for sleep supplements marketed to children.

Evidence Shows Benefits for Some Children

According to the review, melatonin use among children has increased sharply over the past decade. This growth is especially noticeable in countries where the supplement is sold over the counter.

Strong clinical evidence supports melatonin’s short term benefits for children with neurodevelopmental disorders such as autism and attention deficit hyperactivity disorder. In these cases, melatonin can help children fall asleep more quickly, extend total sleep time, and improve overall quality of life for caregivers.

Limited Data for Typically Developing Children

The situation is less clear for children who do not have underlying developmental conditions. Research in this group is limited and often inconsistent. Most randomized clinical trials have been short in duration and focus primarily on older children or teenagers. As a result, researchers cannot draw strong conclusions about younger children, even though melatonin use in that age group is becoming more common.

Long term safety data are especially limited. Scientists still have unanswered questions about whether melatonin could influence puberty, immune function, metabolism, or neurological development when used over extended periods.

Safety Concerns About Melatonin Products

The review also highlights several safety issues that may occur outside controlled clinical environments. Testing of commercial melatonin supplements has revealed major differences between labeled doses and the actual amount of melatonin contained in some products. In some cases, supplements contained several times the stated dose or unexpected compounds such as serotonin.

Data from pediatric poison control centers also show a sharp increase in accidental melatonin ingestions among children. Young children appear particularly vulnerable, often due to gummy formulations that resemble candy and improper storage at home. These findings suggest that the risks associated with real world melatonin use may be higher than previously assumed.

Experts Urge Careful and Limited Use

Researchers caution that melatonin should not be treated as a quick fix for childhood sleep problems. Although it can be useful in certain carefully selected situations, particularly when guided by a healthcare professional, it should not replace thorough sleep assessments or behavioral interventions.

The review stresses that both clinicians and caregivers should view melatonin as a biologically active hormone rather than a harmless supplement. Without stronger evidence and better regulation, routine or unsupervised use could expose children to unnecessary risks while drawing attention away from proven non pharmacological strategies that support healthy sleep.

Behavioral Sleep Strategies Remain First Line Treatment

The findings have important implications for pediatric medicine, public health policy, and caregiver education. Behavioral approaches to sleep should remain the primary treatment for childhood insomnia. These strategies include maintaining consistent bedtime routines, limiting screen exposure before bed, and setting age appropriate sleep expectations.

If melatonin is used, the review recommends starting with the lowest effective dose, limiting the duration of treatment, and using it only under medical supervision. Researchers also emphasize the need for stronger oversight of melatonin products designed for children, clearer labeling standards, and more long term clinical research. These steps could help ensure that children receive safe, effective, and evidence based support for healthy sleep.

Share Button

Astronomers just found the source of the brightest fast radio burst ever

An international team of astronomers, including researchers from the University of Toronto, has identified the brightest Fast Radio Burst (FRB) ever observed and traced its origin to a nearby galaxy using a coordinated network of radio telescopes. FRBs are among the most puzzling phenomena in astronomy, but locating where they come from with precision could mark the start of a new phase in research, allowing scientists to better understand their cosmic origins.

Fast radio bursts are incredibly powerful flashes of radio energy that travel across vast distances in the universe. Scientists believe they are produced by extreme astrophysical events, though the exact cause remains uncertain. Since 2018, the Canadian Hydrogen-Intensity Mapping Experiment, or CHIME, has detected thousands of these bursts. However, determining their exact positions in the sky has remained a major challenge.

CHIME Outrigger Array Pinpoints the Burst

The newly detected signal, named FRB 20250316A and nicknamed RBFLOAT (“Radio Brightest Flash Of All Time”), was localized with remarkable precision using the CHIME/FRB Outrigger array. These smaller versions of the CHIME instrument are installed in British Columbia, Northern California and West Virginia. Working together, they allow astronomers to use Very Long Baseline Interferometry (VLBI), a technique that combines signals from widely separated telescopes to determine an object’s position in the sky with exceptional accuracy.

“We were ultimately extremely lucky that we were able to pinpoint the precise sky position of this rare event,” said Mattias Lazda, doctoral student at the University of Toronto, and an author on both papers. “A few hours after we detected it, we experienced a power outage at one of our telescope sites that played a critical role in telling us where the burst came from. Had the event happened any later that day, we would’ve completely missed our chance.”

A Powerful Burst From a Nearby Galaxy

Although fast radio bursts rank among the most intense radio sources known, they appear only briefly. Each burst typically lasts from a few milliseconds to a few seconds, temporarily shining brighter than every other radio signal in its host galaxy. RBFLOAT, detected on March 16, 2025, lasted about one fifth of a second.

“Cosmically speaking, this fast radio burst is just in our neighborhood,” says Kiyoshi Masui, associate professor of physics and affiliate of MIT’s Kavli Institute for Astrophysics and Space Research, and a U of T alum. “This means we get this chance to study a pretty normal FRB in exquisite detail.”

The burst appeared exceptionally bright partly because its source lies relatively close to Earth. It originated near the outer region of the galaxy NGC 4141, located about 130 million light-years away in the constellation Ursa Major. Researchers were able to narrow the signal’s origin to a region only 45 light-years across, which is smaller than the typical size of a star cluster. Achieving this level of precision is comparable to spotting a guitar pick from 1000 kilometers away.

“The discovery was very exciting, because we had our brightest ever event right after all three outriggers were online,” said Amanda Cook, Banting Postdoctoral Researcher at McGill University and a U of T alum who led the paper describing RBFLOAT. “Immediately, even though it was a Sunday afternoon, a bunch of us piled into a zoom room and started hacking away at the research, hoping to get follow-up observations on source as quickly as possible.”

JWST Observations Reveal a Faint Infrared Signal

The precise location provided by the CHIME/FRB Outrigger array allowed the team to conduct follow-up observations with the James Webb Space Telescope (JWST). During those observations, scientists detected a faint infrared signal at the same location where RBFLOAT originated. The finding was unexpected, and researchers are still exploring what it might represent. One possibility is that the signal comes from a red giant star, while another idea is that it could be a fading light echo related to the burst itself.

“The high resolution of JWST allows us to resolve individual stars around an FRB for the first time. This opens the door to identifying the kinds of stellar environments that could give rise to such powerful bursts, especially when rare FRBs are captured with this level of detail.” said Peter Blanchard, a Harvard postdoctoral fellow and lead author of the companion paper describing the JWST observation.

A Burst That Challenges Current Theories

Even though this event is the brightest FRB ever detected by CHIME, astronomers have not observed any repeat bursts from the same source. Scientists examined hundreds of hours of CHIME data covering the region over more than six years but found no additional signals.

“This burst doesn’t seem to repeat, which makes it different from most well-studied FRBs,” said Cook. “That challenges a major idea in the field, that all FRBs repeat, and opens the door to reconsidering more ‘explosive’ origins for at least some of them.”

Two scientific papers describing the discovery were published in the Astrophysical Journal Letters. One focuses on the original radio detection and precise localization of the burst, while the other reports the JWST near-infrared observations of the same region. Together, the studies provide new insights into fast radio bursts and suggest they could become valuable tools for studying the universe, rather than remaining mysterious cosmic oddities.

Share Button

Scientists discover hidden water beneath Mars that could have supported life

Researchers at New York University Abu Dhabi (NYUAD) have discovered new clues suggesting that water once moved beneath the surface of Mars. The findings indicate that the Red Planet may have remained capable of supporting life for much longer than scientists once believed.

The research, published in the Journal of Geophysical Research – Planets, focuses on ancient sand dunes located in Gale Crater, an area explored by NASA’s Curiosity rover. According to the study, these dunes slowly hardened into rock billions of years ago after interacting with groundwater moving beneath the Martian surface.

Curiosity Rover Data and Earth Desert Comparisons

The investigation was led by Dimitra Atri, Principal Investigator of NYUAD’s Space Exploration Laboratory, together with research assistant Vignesh Krishnamoorthy. To better understand what happened on Mars, the team compared observations from the Curiosity rover with similar rock formations found in the deserts of the United Arab Emirates that formed under comparable conditions on Earth.

Their analysis suggests that water from a nearby Martian mountain gradually seeped into the dunes through tiny fractures. As the moisture moved upward through the sand, it left behind minerals such as gypsum, which is commonly found in desert environments on Earth. These minerals are especially important to scientists because they can capture and preserve traces of organic material. As a result, such deposits are considered promising places for future missions searching for evidence of ancient life.

Subsurface Water May Have Supported Microbial Life

“Our findings show that Mars didn’t simply go from wet to dry,” said Atri. “Even after its lakes and rivers disappeared, small amounts of water continued to move underground, creating protected environments that could have supported microscopic life.”

New Clues About Mars’ Evolution and Habitability

The discovery sheds new light on how Mars changed over billions of years. It also strengthens the idea that underground environments could be some of the best places to look for signs of past life on the planet.

The work was supported by the NYUAD Research Institute and carried out at NYUAD’s Center for Astrophysics and Space Science. The center conducts advanced research aimed at improving scientific understanding of the universe while supporting the United Arab Emirates’ expanding role in global space exploration. The project also involved collaboration with James Weston of NYUAD’s Core Technology Platform and Panče Naumov’s research group.

Share Button

NASA’s Curiosity rover investigates strange spiderweb ridges on Mars

A rugged Martian landscape that resembles a giant spiderweb when seen from orbit may hold important evidence about the history of water on ancient Mars.

For roughly six months, NASA’s Curiosity rover has been studying an area covered with geological features known as boxwork. These formations appear as narrow ridges about 3 to 6 feet (1 to 2 meters) tall separated by sandy depressions. Stretching across the terrain for miles, the crisscrossing ridges hint that groundwater once flowed through this region of Mars later than scientists previously believed. If that is true, it raises new questions about how long microscopic life might have survived on the planet billions of years ago, before its rivers and lakes disappeared and Mars became the cold desert we see today.

From orbit, the boxwork ridges create patterns that look like massive spiderwebs spread across the landscape. Researchers believe the shapes formed when groundwater moved through fractures in the bedrock, depositing minerals along those cracks. Over time, the mineral deposits hardened the fractured zones into ridges. Surrounding rock that lacked this reinforcement gradually eroded away, leaving behind the web-like network visible today.

Before Curiosity reached this region, scientists could only study the formations from orbital images, leaving many questions about their true structure and origin.

Exploring Martian Boxwork Up Close

Boxwork formations also exist on Earth, but they are usually only a few centimeters tall and often appear in caves or dry sandy environments. The Martian versions are far larger. To understand them better, the Curiosity team aimed to investigate the ridges directly and collect detailed measurements.

Navigating the terrain has not been easy. Engineers must carefully guide Curiosity, an SUV-size rover weighing nearly a ton (899 kilograms), along ridge tops that are sometimes only slightly wider than the rover itself.

“It almost feels like a highway we can drive on. But then we have to go down into the hollows, where you need to be mindful of Curiosity’s wheels slipping or having trouble turning in the sand,” said operations systems engineer Ashley Stroupe of NASA’s Jet Propulsion Laboratory in Southern California, which built Curiosity and leads the mission. “There’s always a solution. It just takes trying different paths.”

Scientists are also working to understand how such an extensive network of ridges formed on Mount Sharp, the 3-mile-tall (5-kilometer-tall) mountain that Curiosity has been climbing. Each layer of the mountain represents a different chapter in Mars’ ancient climate history. As the rover ascends, the landscape increasingly shows signs that water gradually disappeared over time, although occasional wetter periods allowed rivers and lakes to return.

“Seeing boxwork this far up the mountain suggests the groundwater table had to be pretty high,” said Tina Seeger of Rice University in Houston, one of the mission scientists leading the boxwork investigation. “And that means the water needed for sustaining life could have lasted much longer than we thought looking from orbit.”

Evidence of Ancient Groundwater

Earlier satellite images revealed another intriguing feature: dark lines running through the spiderweb-like ridges. In 2014, researchers suggested these streaks might represent central fractures where groundwater once seeped through cracks in the rock and concentrated minerals.

Curiosity’s close examination has confirmed that these dark lines are indeed fractures, supporting the idea that groundwater shaped the formation of the ridges.

The rover also spotted small, bumpy structures called nodules. These textures are commonly linked to ancient groundwater activity and have been observed by Curiosity and other Mars missions in the past. Surprisingly, the nodules were not located near the central fractures. Instead, they appeared along the sides of the ridges and within the sandy hollows between them.

“We can’t quite explain yet why the nodules appear where they do,” Seeger said. “Maybe the ridges were cemented by minerals first, and later episodes of groundwater left nodules around them.”

Curiosity Acts as a Mobile Chemistry Lab

A key part of Curiosity’s mission involves collecting rock samples with a drill attached to the end of its robotic arm. The drill grinds rock into powder, which is then delivered to sophisticated instruments inside the rover for analysis.

Last year, scientists analyzed three samples taken from the boxwork region. One came from the top of a ridge, another from bedrock inside a hollow, and a third from an area Curiosity passed through before reaching the ridges. Using X-ray analysis and a high-temperature oven, the rover detected clay minerals within the ridge and carbonate minerals in the hollow. These discoveries provide additional hints about the processes that formed the unusual terrain.

More recently, the rover collected a fourth sample for a specialized analysis reserved for particularly interesting targets. After the powdered rock was heated in the rover’s oven, chemical reagents were introduced to perform what scientists call wet chemistry. This method helps reveal certain organic compounds, carbon-based molecules that play an important role in the chemistry of life.

Continuing the Search for Mars’ Climate History

Curiosity is expected to move on from the boxwork region sometime in March. The area lies within a layer of Mount Sharp rich in salty minerals known as sulfates. These minerals formed as water on Mars gradually disappeared.

Over the coming year, the rover will continue traveling through this sulfate-rich layer, gathering new clues about how the climate of the ancient Red Planet changed billions of years ago.

About the Curiosity Rover

Curiosity was built by NASA’s Jet Propulsion Laboratory, which is managed by Caltech in Pasadena, California. JPL operates the mission for NASA’s Science Mission Directorate in Washington as part of NASA’s Mars Exploration Program portfolio.

Share Button

Scared of spiders? Scientists say the real nightmare is losing them

Members of the arachnid class — think spiders, scorpions and harvestmen (daddy long legs) — often trigger feelings of fear or disgust. Despite this reaction, these animals play an essential role in maintaining healthy ecosystems. As global biodiversity declines, including what some researchers describe as an “insect apocalypse,” two ecologists at the University of Massachusetts Amherst set out to examine how insects and arachnids are doing in the United States. What they uncovered was striking: there are enormous gaps in the available data. Their findings, recently published in PNAS, highlight an urgent need to better study, protect and appreciate insects and arachnids, which form a critical foundation for planetary health.

“Insects and arachnids are fundamental for human society,” says Laura Figueroa, assistant professor of environmental conservation at UMass Amherst and the study’s senior author. “They help with pollination and biological control of pests; they can serve as monitors of air and water quality, and they have worked their way deeply into many cultures throughout the world” — think of Aragog in the Harry Potter book series, for example. “Many people care about popular charismatic animals on the planet, like lions and pandas, which, justly, have received international conservation attention. Given that insects and arachnids don’t usually get the same attention, we wanted to know how they were doing.”

Nearly 90% of Species Lack Conservation Status

To understand the condition of these often overlooked creatures, Figueroa and her graduate student Wes Walsh, the paper’s lead author, compiled conservation assessments for the 99,312 known insect and arachnid species living in North America north of Mexico. The results were startling.

“Almost 90% — 88.5% to be precise — of insect and arachnid species have no conservation status,” says Figueroa. “We simply have no idea how they are doing. Almost nothing is known about the conservation needs of most insects and arachnids in North America.”

The limited information that does exist is uneven. Much of the available research focuses on aquatic insects that help scientists monitor water quality (mayflies, stoneflies and caddisflies). Meanwhile, more visually appealing insect groups such as butterflies and dragonflies receive a disproportionate share of conservation protections.

“Arachnids, in particular, are really missing from conservation; most states don’t even protect a single species. We need more data and protection for insects, but also arachnids,” says Walsh.

Conservation Protection Varies by State

The researchers also found patterns in which states are more likely to protect these species. States that depend heavily on extractive industries such as mining, quarrying and oil and gas extraction tended to offer fewer protections for insects and arachnids. In contrast, states where public attitudes are more environmentally focused were more likely to safeguard a larger number of species.

Lessons From Successful Bird Conservation

Figueroa points to bird conservation as an example of how coordinated efforts can make a difference. Programs focused on birds have achieved far greater success in protecting and recovering species.

“The research shows that you get the best conservation efforts when broad, diverse coalitions come together,” she says. “In the case of birds, it was hunters, bird watchers, nonprofit organizations and many other constituencies who banded together to reach a common goal.”

Why Insects and Arachnids Deserve Protection

“Insects and arachnids are more than objects of fear,” says Walsh, who sports a beautiful spider tattoo on his arm. “We need to appreciate them for their ecological importance, and that begins with collecting more data and considering them worthy of conservation.”

Share Button

Sculpting jaws, giving scores: Inside the world of looksmaxxing

Growing numbers of young men are going to great lengths to achieve what they see as the perfect face.

Share Button

How often do people really fart? Scientists built smart underwear to find out

Researchers at the University of Maryland have developed Smart Underwear, the first wearable device designed specifically to measure human flatulence. The small sensor tracks hydrogen in flatus, allowing scientists to reexamine long held assumptions about how often people pass gas. The technology also offers a new way to observe gut microbial metabolism during everyday life.

For many years, doctors have had limited tools to evaluate patients who report problems with intestinal gas. Gastroenterologist Michael Levitt, widely known in the field as the “King of Farts,” highlighted the challenge in 2000 when he wrote: “It is virtually impossible for the physician to objectively document the existence of excessive gas using currently available tests.”

A Wearable Sensor That Tracks Intestinal Gas

To tackle this issue, a research group led by Brantley Hall, an assistant professor in the Department of Cell Biology and Molecular Genetics at UMD, created Smart Underwear, a compact wearable device that clips discreetly onto regular underwear. The device contains electrochemical sensors that continuously monitor intestinal gas production throughout the day and night.

In research published in Biosensors and Bioelectronics: X, a study led by UMD assistant research scientist Santiago Botasini used the device to measure flatulence in healthy adults. Participants produced flatus an average of 32 times per day, about twice the 14 (±6) daily events often cited in earlier medical literature. However, results varied widely among individuals, with totals ranging from just four flatus events per day to as many as 59.

Older estimates were likely lower because previous studies depended on invasive measurement techniques conducted in small groups or relied on self reporting. Both approaches can miss events, depend on imperfect memory, and cannot record gas production while someone is asleep. In addition, people differ significantly in visceral sensitivity, meaning two individuals may produce similar amounts of flatus yet perceive it very differently.

“Objective measurement gives us an opportunity to increase scientific rigor in an area that’s been difficult to study,” said Hall, the study’s senior author.

Tracking Gut Microbial Activity Through Hydrogen Gas

In most people, flatus is composed primarily of hydrogen, carbon dioxide and nitrogen. Some individuals also produce methane. Hydrogen is generated exclusively by microbes living in the gut, so continuously measuring hydrogen in flatus provides a direct signal of microbial fermentation activity as gut bacteria break down food components.

“Think of it like a continuous glucose monitor, but for intestinal gas,” Hall said, explaining that the device detected increased hydrogen production after participants consumed inulin, a prebiotic fiber. The sensor identified these increases with 94.7% sensitivity.

Human Flatus Atlas Aims To Define What Is Normal

Scientists have established normal ranges for many health measures such as blood glucose and cholesterol. For flatulence, however, there is no widely accepted baseline.

“We don’t actually know what normal flatus production looks like,” Hall said. “Without that baseline, it’s hard to know when someone’s gas production is truly excessive.”

To address this gap, Hall’s laboratory is launching a large project called the Human Flatus Atlas. The study will use Smart Underwear to measure flatulence patterns continuously in hundreds of participants while also analyzing their diets and gut microbiome composition. Devices will be shipped directly to volunteers, allowing adults across the United States to participate from home. The goal is to determine the normal range of flatus production among people in the United States over the age of 18.

Studying Different Types of Gut Gas Producers

To capture the full spectrum of variation, researchers are recruiting volunteers who fit several categories identified during early research.

Zen Digesters are people who eat high fiber diets (25-38 grams of fiber daily) but produce very little flatus. Studying them may help researchers understand how the microbiome adapts to diets rich in fiber.

Hydrogen Hyperproducers are individuals who pass gas frequently. Examining this group may reveal biological factors that drive high gas production.

Normal People represent those who fall between these two extremes.

To better understand the microbes responsible for these differences, the team will collect stool samples from Zen Digesters and Hydrogen Hyperproducers for microbiome analysis.

“We’ve learned a tremendous amount about which microbes live in the gut, but less about what they’re actually doing at any given moment,” Hall said. “The Human Flatus Atlas will establish objective baselines for gut microbial fermentation, which is essential groundwork for evaluating how dietary, probiotic or prebiotic interventions change microbiome activity.”

How To Join the Human Flatus Atlas Study

People interested in participating can learn more at flatus.info. Enrollment is open to adults ages 18 years or older in the U.S. Participants will receive a Smart Underwear device and will wear it both day and night during the study period. Enrollment is limited.

Patent applications have been filed for the technology, listing Brantley Hall and Santiago Botasini as inventors. Both are also co founders of Ventoscity LLC, which has licensed the device.

This research received support from the University of Maryland, the Maryland Innovation Initiative Phase I and the UM Ventures Medical Device Development Fund.

Share Button

Our Sun may have escaped the Milky Way’s center with thousands of twin stars

Astronomers have uncovered signs that our Sun may have taken part in a large-scale movement of similar stars that left the inner regions of the Milky Way about 4 to 6 billion years ago. To investigate this possibility, researchers compiled and analyzed an exceptionally precise catalog of stars using observations from the European Space Agency’s Gaia satellite. Their results offer new insights into how the Milky Way evolved, particularly the formation of the rotating bar-shaped structure located at the galaxy’s center.

On Earth, archaeology reconstructs the past by studying ancient artifacts and remains. In space, scientists use a similar approach called galactic archaeology to piece together the history of stars and galaxies.

Astronomers know that the Sun formed about 4.6 billion years ago at a location more than 10,000 light years closer to the Milky Way’s center than where it sits today. Evidence from stellar chemical compositions supports this idea, yet the explanation has long puzzled researchers. Observations of our galaxy show a massive bar-like structure in the central region that produces what scientists call a “corotation barrier.” This gravitational effect makes it difficult for stars to travel far outward from the galactic center.

Studying Solar Twins With Gaia

To investigate how the Sun might have reached its current orbit, a research team led by Assistant Professors Daisuke Taniguchi from Tokyo Metropolitan University and Takuji Tsujimoto from the National Astronomical Observatory of Japan carried out a large study of solar “twins.” These stars share nearly the same temperature, surface gravity, and chemical composition as our Sun.

The researchers relied on the Gaia satellite mission, which has collected detailed measurements for about two billion stars and other celestial objects. Using this enormous dataset, they assembled a catalog containing 6,594 solar twins. This sample is roughly 30 times larger than those used in earlier surveys.

Age Distribution Reveals a Shared Migration

With this expanded dataset, the team was able to determine the ages of these stars with unprecedented accuracy. They also corrected for selection bias that favors brighter stars that are easier for telescopes to detect.

When the researchers examined the ages of the solar twins, they found a clear concentration of stars between 4 and 6 billion years old. The Sun falls within this same age range. Many of these stars also appear to occupy similar distances from the galactic center. Together, these clues suggest that the Sun’s present location is not simply coincidental. Instead, it likely arrived here as part of a much larger outward movement of stars.

Clues to the Formation of the Milky Way’s Central Bar

The findings provide new information about the Milky Way’s structure and history. Under normal circumstances, the corotation barrier produced by the galaxy’s central bar would prevent such a large number of stars from moving away from the inner region. However, the situation could have been different if the bar structure was still forming during that period.

The ages of the solar twins not only point to when this large migration may have happened, but also suggest the time span during which the galactic bar developed.

Why the Sun’s Journey Matters for Life

The inner parts of the Milky Way are far more hostile than its outer regions. Conditions near the galactic center include stronger radiation and more frequent interactions between stars. According to the researchers, the Sun’s movement away from this crowded environment may have helped place our solar system in a calmer part of the galaxy.

This quieter region provided conditions that allowed life on Earth to eventually emerge and evolve.

This work made use of data products from the European Space Agency (ESA) space mission Gaia and the Two Micron All Sky Survey. It was supported by the Tokyo Center For Excellence Project, Tokyo Metropolitan University, JSPS KAKENHI Grant Numbers 23KJ2149 and 23H00132, the European Union’s Horizon 2020 Research and Innovation Program under SPACE-H2020 Grant Agreement Number 101004214 (EXPLORE project).

Share Button

‘My hotel bill is £12,000’: British holidaymakers stranded by Iran war

Flights are restricted due to the conflict leaving people stuck running up bills for rooms and food.

Share Button

Study finds two types of colon polyps can raise bowel cancer risk fivefold

Researchers from Flinders University and Flinders Medical Centre have identified an important connection between two common types of bowel polyps and a greater risk of cancer. Their findings appear in the journal Clinical Gastroenterology and Hepatology (CGH).

Bowel cancer, also known as colorectal cancer, is a major health concern. In Australia it ranks as the second leading cause of cancer death and the fourth most frequently diagnosed cancer.

Many colorectal cancers begin as polyps, which are growths that develop on the inner lining of the bowel. These growths are usually benign and cause no immediate harm. However, two specific types of polyps, — adenomas and serrated polyps — have the potential to develop into cancer over time.

Colonoscopy Study Reveals Fivefold Increase in Risk

To better understand this risk, researchers reviewed more than 8,400 colonoscopy records. The analysis showed that people who had both adenomas and serrated polyps faced a much higher likelihood of developing advanced precancerous changes. In fact, the risk was up to five times greater compared with people who had only one type of polyp.

“Polyps are common and usually harmless, but when both types appear together — what we call synchronous lesions — the risk of serious bowel disease or cancer rises sharply,” says Dr. Molla Wassie, lead author and researcher at the FHMRI Bowel Health Service.

The researchers also found that this combination may be more widespread than previously believed. Nearly half of patients who had serrated polyps were also found to have adenomas.

Separate Cancer Pathways May Occur at the Same Time

“This is one of the largest studies of its kind,” says Dr. Wassie.

“Our findings support growing international evidence that these two types of polyps may represent separate cancer pathways that can be active at the same time — making early detection and regular monitoring even more important.”

The study also suggests that serrated polyps may develop into cancer more quickly than adenomas. This highlights the importance of screening strategies and follow up colonoscopy schedules that reflect differences between polyp types.

Why Regular Colonoscopy Screening Matters

“Polyps become more common as we age, but the key is catching and removing them early,” says Dr. Wassie.

“If you’ve had both types of polyps, it’s especially important to stay on top of your colonoscopy schedule.”

People over age 45 or those with a family history of bowel disease are encouraged to speak with their GP or visit the National Bowel Cancer Screening Program to learn about available screening options.

The Southern Cooperative Program for the Prevention of Colorectal Cancer program (SCOOP) was first funded by the National Demonstration Hospitals Program Phase 3. Dr. Wassie is supported by a NHMRC Investigator Grant (#2009050).

Share Button