logo
Mediterranean monk seals: Back from the brink

Mediterranean monk seals: Back from the brink

CNN23-05-2025

Editor's Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex's Perpetual Planet Initiative has partnered with CNN to drive awareness and education around key sustainability issues and to inspire positive action.
Mediterranean monk seals, with their big, round eyes and gentle appearance, are cleverer than they look. Known for their sneaky tactic of snatching the catch from fishing nets and sometimes ripping them in the process, they have not been popular with fishermen, with some deliberately killing seals in retaliation.
The mammal, which was once widespread across the Mediterranean, Black Sea, northwest Africa, and the Atlantic islands of the Canaries, Madeira and the Azores, was also historically hunted for meat, oil and skins. As a result of these threats, populations suffered a dramatic decline in the 20th century, with the species becoming one of the most endangered marine mammals on Earth.
But in recent years, the tide has turned. While Mediterranean monk seals remain at risk, thanks to conservation efforts and legal protections, populations have bounced back. Some estimate that earlier this century, the population was between 400 and 600; now there are up to 1,000 estimated globally.
In 2015, the species was reclassified from 'critically endangered' to 'endangered,' and two years ago, it was listed as 'vulnerable.' Scientists hope that with continued care, the species will have a brighter future.

Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

Meet the MIND diet: With some claiming it can keep your brain strong
Meet the MIND diet: With some claiming it can keep your brain strong

Yahoo

time6 hours ago

  • Yahoo

Meet the MIND diet: With some claiming it can keep your brain strong

Sticking to a brain-healthy diet can help fight off Alzheimer's disease and other forms of dementia. The MIND — or 'Mediterranean-DASH Intervention for Neurodegenerative Delay' — diet has been effective in this area, according to new research. The strategy combines the well-known Mediterranean diet with the DASH, or 'Dietary Approaches to Stop Hypertension,' eating plan, emphasizing foods such as leafy green vegetables, berries, nuts, fish, poultry, and olive oil. The DASH eating plan targets a 2,000-calorie-a-day diet, limiting sugar and foods high in saturated fats. 'Our study findings confirm that healthy dietary patterns in mid to late life and their improvement over time may prevent Alzheimer's and related dementias,' Dr. Song-Yi Park, an associate professor at the University of Hawaii at Manoa, said in a statement. 'This suggests that it is never too late to adopt a healthy diet to prevent dementia.' Park is presenting the findings at the annual meeting of the American Society for Nutrition on Monday. Park and his colleagues analyzed data from nearly 93,000 American adults who had provided information about their diets starting in the 1990s when they were between the ages of 45 and 75 years old. More than 21,000 have since developed Alzheimer's or related dementias. Those who stuck to the plant-forward MIND diet had a 9 percent lower risk of dementia. That was even more pronounced among those who identified as African American, Latino or White, at around 13 percent. The trend was not as apparent among Asian Americans and showed a weaker trend in Native Hawaiians. Those who enhanced their commitment to the diet over time showed the greatest risk reduction. That was true for both older and younger groups. Participants who improved their compliance had a 25 percent lower risk of dementia compared with those whose adherence declined. The findings build upon previous research which found the diet slashed the risk of Alzheimer's by as much as more than half for those who stuck to it rigorously and more than a third in those with moderate commitment. Leafy greens are especially associated with less Alzheimer's brain pathology, according to the National Institute on Aging. Whatever the cause, adhering to the healthy diet may help millions of Americans with Alzheimer's disease, which accounts for 60-80 percent of dementia cases. 'A tailored approach may be needed when evaluating different subpopulations' diet quality,' Park explained.

Once inevitable collision between Milky Way and Andromeda galaxies now seems less likely, astronomers say
Once inevitable collision between Milky Way and Andromeda galaxies now seems less likely, astronomers say

Yahoo

time8 hours ago

  • Yahoo

Once inevitable collision between Milky Way and Andromeda galaxies now seems less likely, astronomers say

Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A collision between our Milky Way galaxy and its largest neighbor, the Andromeda galaxy, predicted to occur in about 4.5 billion years, has been anticipated by astronomers since 1912. But new research suggests that the likelihood of this galactic clash, dubbed 'Milkomeda,' is smaller than it seems. At first glance, it appears likely that the galactic duo — separated by about 2.5 million light-years — is on an inevitable collision course. The Milky Way and Andromeda are barreling toward each other at about 223,694 miles per hour (100 kilometers per second). However, the Local Group, or our corner of the universe, includes 100 known smaller galaxies. A team of astronomers factored in some of the largest among them, including the Large Magellanic Cloud, or LMC, and M33, or the Triangulum galaxy, to see how much of a role they might play on the chessboard of our galaxy's future over the next 10 billion years. After factoring in the gravitational pull of Local Group galaxies and running 100,000 simulations using new data from the Hubble and Gaia space telescopes, the team found there is about a 50% chance of a collision between the Milky Way and Andromeda in the next 10 billion years. There is only about a 2% chance the galaxies will collide in 4 to 5 billion years as previously thought, according to the study published Monday in the journal Nature Astronomy. A merger of the Milky Way and Andromeda galaxies would destroy them both, eventually turning both spiral structures into one elongated galaxy, the study authors said. Collisions between other galaxies have been known to create 'cosmic fireworks, when gas, driven to the center of the merger remnant, feeds a central black hole emitting an enormous amount of radiation, before irrevocably falling into the hole,' said study coauthor Carlos Frenk, professor at Durham University in England. 'Until now we thought this was the fate that awaited our Milky Way galaxy,' Frenk said. 'We now know that there is a very good chance that we may avoid that scary destiny.' However, there are many unknown factors that make it difficult to predict the ultimate fate of our galaxy, according to the study authors. And, Frenk warns, the Milky Way has a greater chance of colliding with the LMC within 2 billion years, which could fundamentally alter our galaxy. The LMC orbits the Milky Way, while M33 is a satellite of Andromeda. The LMC's mass is only about 15% of the Milky Way's. But the team found that the satellite galaxy has a gravitational pull, perpendicular to Andromeda, that changes the Milky Way's motion enough to reduce the chance of a merger between the two giant galaxies. It's a similar case for M33. 'The extra mass of Andromeda's satellite galaxy M33 pulls the Milky Way a little bit more towards it,' said lead study author Dr. Till Sawala, astronomer at the University of Helsinki in Finland. 'However, we also show that the LMC pulls the Milky Way off the orbital plane and away from Andromeda. It doesn't mean that the LMC will save us from that merger, but it makes it a bit less likely.' Previous research also has assumed most likely values for unknown data, such as the uncertainties in the present positions, motions and masses of the Local Group galaxies. In the new study, the team accounted for 22 different variables, including those unknowns, that could contribute to a collision. 'We ran many thousands of simulations, which allowed us to account for all the observational uncertainties,' Sawala said. 'Because there are so many variables that each have their errors, that accumulates to rather large uncertainty about the outcome, leading to the conclusion that the chance of a direct collision is only 50% within the next 10 billion years.' In just over half of the simulations predicting what could occur in 8 to 10 billion years, the Milky Way and Andromeda galaxies initially sailed somewhat closely past each other before circling back and then losing enough orbital energy to collide and merge as one galaxy. These initial close encounters between each galaxy's halo — a large envelope of gas — would eventually lead to a collision. 'In general, the merger would most likely involve a strong starburst, during which many new stars would form, followed by a period of intense radiation caused by exploding young stars and the newly active supermassive black hole, eventually shutting down star formation completely,' Sawala said. 'A few billion years later, any traces of the former Milky Way and Andromeda would disappear, and the remnant would be a largely featureless elliptical galaxy.' In the other simulations, both galaxies crossed paths without disturbing each other. Geraint Lewis, a professor of astrophysics at the University of Sydney's Institute for Astronomy, finds the results showing the gravitational influence of M33 and the LMC interesting. He has previously authored research on a potential collision between Andromeda and the Milky Way. 'We won't know if the collision is definitely off in the future, but this clearly shows that the story that people tell — that there will be a collision that will destroy the Milky Way and Andromeda — is not as clear or certain that people think,' Lewis said. 'But even if there is a pretty close encounter rather than smashing head-on, the gravitational tearing that each will assert on each other is likely to leave the two large galaxies in a sorry state.' While including the LMC's gravitational effects on the Milky Way is important, accounting for uncertainties is the most important aspect of the new study, said Scott Lucchini, a postdoctoral fellow in the Institute for Theory and Computation at the Center for Astrophysics, Harvard & Smithsonian. 'Here, they've sampled from the uncertainties in the positions, velocities, and masses of the galaxies to obtain the relative probabilities of different outcomes,' Lucchini wrote in an email. 'This really gives us the whole picture of what could happen in the future.' Galaxies are full of intricacies. Their shapes can become distorted, interactions can change their orbits and they can lose mass in different ways. Such complexities make predictions difficult, Lucchini said. That essentially leaves the fate of the Milky Way 'completely open,' the study authors wrote in the new paper. However, more data coming from the Gaia space telescope in the summer of 2026 will provide measurements that refine some of the uncertainties about the speed and direction at which Andromeda is moving across the sky, Sawala said. The fate of the sun may have a bigger impact on Earth's future than the motions of galaxies, according to the researchers. Our sun is 4.5 billion years old. When it starts to die in another 5 billion years, it will swell into a red giant that engulfs Mercury, Venus and potentially Earth, according to NASA. 'The short answer is that the end of the sun is far worse for our planet than the collision with Andromeda,' Sawala said. 'While that merger would mean the end of our galaxy, it would not necessarily be the end of the sun or the Earth. Although our work also shows that earlier studies, that purported to predict precisely what the fate of the solar system would be after the merger, were clearly premature, in general, collisions between stars or planets are extremely rare during galaxy mergers. And while the end of the sun is certain, our study shows that the end of the galaxy is anything but.' While the team didn't model a merger between the LMC and the Milky Way in detail, they found a 'virtual certainty' that a merger between the two galaxies will occur within the next 2 billion years, which aligns with previous research, Sawala said. But the effects will likely be more minor than a merger between the Milky Way and Andromeda. 'The merger (between the Milky Way and the LMC) will not destroy our galaxy but it will change it profoundly, particularly impacting our central supermassive black hole and the galactic halo,' Frenck wrote in an email. He also served as a coauthor on a 2019 paper on the potential merger.

Eating healthier can protect aging brain, study says
Eating healthier can protect aging brain, study says

UPI

time11 hours ago

  • UPI

Eating healthier can protect aging brain, study says

People who improved their healthy eating in middle-age had a 25% lower risk of lower risk of dementia, compared to those whose diets got worse, according to findings reported Monday at a meeting of the American Society for Nutrition. Adobe stock/HealthDay June 2 (UPI) -- It's never too late to start eating right as a means of protecting your brain health, a new study says. People who improved their healthy eating in middle-age had a 25% lower risk of lower risk of dementia, compared to those whose diets got worse, according to findings reported Monday at a meeting of the American Society for Nutrition. "Our study findings confirm that healthy dietary patterns in mid to late life and their improvement over time may prevent Alzheimer's and related dementias," researcher Song-Yi Park, an associate professor at the University of Hawaii at Manoa, said in a news release. "This suggests that it is never too late to adopt a healthy diet to prevent dementia," she added. For the study, researchers analyzed data from nearly 93,000 adults taking part in a long-term health study. Participants were between 45 and 75 when the study started in the 1990s, and more than 21,000 developed Alzheimer's disease or dementia in the years that followed. Study participants filled out diet questionnaires, and researchers assessed their responses to gauge their adherence to the MIND (Mediterranean-DASH Intervention for Neurodegenerative Delay) diet. The MIND diet combines the Mediterranean diet with the DASH (Dietary Approaches to Stop Hypertension) diet, two eating patterns that have been shown to improve people's health. It emphasizes whole grains, vegetables, nuts, beans, berries, poultry and fish, while recommending that people limit pastries, sweets, red meat, cheese, fried foods and butter/margarine, according to the Harvard T.H. Chan School of Public Health. Overall, people whose diets aligned with the MIND eating pattern from the start had a 9% lower risk of dementia. An even greater reduction of 13% was seen among Black, Hispanic or white people, results show. "We found that the protective relationship between a healthy diet and dementia was more pronounced among African Americans, Latinos and Whites, while it was not as apparent among Asian Americans and showed a weaker trend in Native Hawaiians," Park said. "A tailored approach may be needed when evaluating different subpopulations' diet quality." However, people whose diets grew closer to the MIND diet over a 10-year period had a 25% lower risk of dementia - even if they didn't follow that eating pattern closely at first, researchers found. Park presented the study this morning at the ASN meeting in Orlando, Fla. Findings presented at medical meetings should be considered preliminary until published in a peer-reviewed journal. More information The Harvard T.H. Chan School of Public Health has more on the MIND diet. Copyright © 2025 HealthDay. All rights reserved.

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into the world of global news and events? Download our app today from your preferred app store and start exploring.
app-storeplay-store