The Supreme Court is headed toward a radically new vision of unlimited presidential power

Source: The Conversation – USA – By Graham G. Dodds, Professor of Political Science, Concordia University

In a series of cases over the past 15 years, the Supreme Court has moved in a pro-presidential direction. Geoff Livingston/Getty Images

President Donald Trump set the tone for his second term by issuing 26 executive orders, four proclamations and 12 memorandums on his first day back in office. The barrage of unilateral presidential actions has not yet let up.

These have included Trump’s efforts to remove thousands of government workers and fire several prominent officials, such as members of the Corporation for Public Broadcasting and the chair of the Commission on Civil Rights. He has also attempted to shut down entire agencies, such as the Department of Education and the U.S. Agency for International Development.

For some scholars, these actions appear rooted in the psychology of an unrestrained politician with an overdeveloped ego.

But it’s more than that.

As a political science scholar who studies presidential power, I believe Trump’s recent actions mark the culmination of the unitary executive theory, which is perhaps the most contentious and consequential constitutional theory of the past several decades.

A prescription for a potent presidency

In 2017, Trump complained that the scope of his power as president was limited: “You know, the saddest thing is that because I’m the president of the United States, I am not supposed to be involved with the Justice Department. I am not supposed to be involved with the FBI, I’m not supposed to be doing the kind of things that I would love to be doing. And I’m very frustrated by it.”

The unitary executive theory suggests that such limits wrongly curtail the powers of the chief executive.

Formed by conservative legal theorists in the 1980s to help President Ronald Reagan roll back liberal policies, the unitary executive theory promises to radically expand presidential power.

There is no widely agreed upon definition of the theory. And even its proponents disagree about what it says and what it might justify. But in its most basic version, the unitary executive theory claims that whatever the federal government does that is executive in nature – from implementing and enforcing laws to managing most of what the federal government does – the president alone should personally control it.

This means the president should have total control over the entire executive branch, with its dozens of major governmental institutions and millions of employees. Put simply, the theory says the president should be able to issue orders to subordinates and to fire them at will.

President Donal Trump appears seated in the oval office.
President Donald Trump signs executive orders in the Oval Office next to a poster displaying the Trump Gold Card on Sept. 19, 2025.
AP Photo/Alex Brandon

The president could boss around the FBI or order the U.S. attorney general to investigate his political opponents, as Trump has done. The president could issue signing statements – a written pronouncement – that reinterpret or ignore parts of the laws, like George W. Bush did in 2006 to circumvent a ban on torture. The president could control independent agencies such as the Securities and Exchange Commission and the Consumer Product Safety Commission. The president might be able to force the Federal Reserve to change interest rates, as Trump has suggested. And the president might possess inherent power to wage war as he sees fit without a formal authorization from Congress, as officials argued during Bush’s presidency.

A constitutionally questionable doctrine

A theory is one thing. But if it gains the official endorsement of the Supreme Court, it can become governing orthodoxy. It appears to many observers and scholars that Trump’s actions have intentionally invited court cases by which he hopes the judiciary will embrace the theory and thus permit him to do even more. And the current Supreme Court appears ready to grant that wish.

Until recently, the judiciary tended to indirectly address the claims that now appear more formally as the unitary executive theory.

During the country’s first two centuries, courts touched on aspects of the theory in cases such as Kendall v. U.S. in 1838, which limited presidential control of the postmaster general, and Myers v. U.S. in 1926, which held that the president could remove a postmaster in Oregon.

In 1935, in Humphrey’s Executor v. U.S., the high court unanimously held that Congress could limit the president’s ability to fire a commissioner of the Federal Trade Commission. And in Morrison v. Olson the court in 1988 upheld the ability of Congress to limit the president’s ability to fire an independent counsel.

Some of those decisions aligned with some unitary executive claims, but others directly repudiated them.

Warming up to a unitary executive

In a series of cases over the past 15 years, the Supreme Court has moved in an unambiguously unitarian, pro-presidential direction. In these cases, the court has struck down statutory limits on the president’s ability to remove federal officials, enabling much greater presidential control.

These decisions clearly suggest that long-standing, anti-unitarian landmark decisions such as Humphrey’s are on increasingly thin ice. In fact, in Justice Clarence Thomas’ 2019 concurring opinion in Seila Law LLC v. CFPB, where the court ruled the Consumer Financial Protection Bureau’s leadership structure was unconstitutional, he articulated his desire to “repudiate” the “erroneous precedent” of Humphrey’s.

Several cases from the court’s emergency docket, or shadow docket, in recent months indicate that other justices share that desire. Such cases do not require full arguments but can indicate where the court is headed.

In Trump v. Wilcox, Trump v. Boyle and Trump v. Slaughter, all from 2025, the court upheld Trump’s firing of officials from the National Labor Relations Board, the Merit Systems Protection Board, the Consumer Product Safety Commission and the Federal Trade Commission.

Previously, these officials had appeared to be protected from political interference.

President George W. Bush appears with several soldiers.
President George W. Bush signed statements in 2006 to bypass a ban on torture.
AP Photo/Pablo Martinez Monsivais, File

Total control

Remarks by conservative justices in those cases indicated that the court will soon reassess anti-unitary precedents.

In Trump v. Boyle, Justice Brett Kavanaugh wrote, “whether this Court will narrow or overrule a precedent … there is at least a fair prospect (not certainty, but at least a reasonable prospect) that we will do so.” And in her dissent in Trump v. Slaughter, Justice Elena Kagan said the conservative majority was “raring” to overturn Humphrey’s and finally officially embrace the unitary executive.

In short, the writing is on the wall, and Humphrey’s may soon go the way of Roe v. Wade and other landmark decisions that had guided American life for decades.

As for what judicial endorsement of the unitary executive theory could mean in practice, Trump seems to hope it will mean total control and hence the ability to eradicate the so-called “deep state.” Other conservatives hope it will diminish the government’s regulatory role.

Kagan recently warned it could mean the end of administrative governance – the ways that the federal government provides services, oversees businesses and enforces the law – as we know it:

“Humphrey’s undergirds a significant feature of American governance: bipartisan administrative bodies carrying out expertise-based functions with a measure of independence from presidential control. Congress created them … out of one basic vision. It thought that in certain spheres of government, a group of knowledgeable people from both parties – none of whom a President could remove without cause – would make decisions likely to advance the long-term public good.”

If the Supreme Court officially makes the chief executive a unitary executive, the advancement of the public good may depend on little more than the whims of the president, a state of affairs normally more characteristic of dictatorship than democracy.

The Conversation

Graham G. Dodds does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. The Supreme Court is headed toward a radically new vision of unlimited presidential power – https://theconversation.com/the-supreme-court-is-headed-toward-a-radically-new-vision-of-unlimited-presidential-power-265840

Wings, booze and heartbreak – what my research says about the hidden costs of sports fandom

Source: The Conversation – USA (2) – By Aaron Mansfield, Assistant Professor of Sport Management, Merrimack College

A Buffalo Bills fan who prefers ketchup over mustard on his hot dog. Brett Carlsen/Getty Images

Being from Buffalo means getting to eat some of the best wings in the world. It means scraping snow and ice off your car in frigid mornings. And it means making a lifelong vow to the city’s NFL franchise, the Bills – for better or worse, till death do us part.

When I grew up in New York’s second-largest city, my community was bound together by loyalty to a football team that always found new ways to break our hearts. And yet at the start of each NFL season, we always found reasons to hope – we couldn’t help ourselves.

Coming from this football-crazed culture, I often wondered about the psychology of fandom. This eventually led me to pursue a Ph.D. in sport consumer behavior. As a doctoral student, I was most interested in one question: Is fandom good for us?

I found a huge body of research on the psychological and social effects of fandom, and it certainly made being devoted to a team look good. Fandom builds belonging, helps adults make friends, boosts happiness and even provides a buffer against traumatic life events.

So, fandom is great, right?

As famed football commentator Lee Corso would say: “Not so fast, my friend.”

While fandom appears to be a boon for our mental health, strikingly little research had been conducted on the relationship between fandom and physical health.

So I decided to conduct a series of studies – mainly of people in Western countries – on this topic. I found that being a sports fan can have some drawbacks for physical health, especially among the most committed fans.

Reach for the nachos

Playing sports is healthy. But watching them? Not so much.

Tailgating culture revolves around alcohol. Research shows that college sports fans binge drink at significantly higher rates than nonfans, are more likely to do something they later regretted and are more likely to drive drunk. Meanwhile, watch parties encourage being stationary for hours and mindlessly snacking. And, of course, fandom goes hand in hand with heavily processed foods like wings, nachos, pizza and hot dogs.

One fan told me that when watching games, his relationship with food is “almost Pavlovian”; he craves “decadent” foods the same way he seeks out popcorn at the movies.

Rows of leather chairs filled with men, many of whom have multiple beers on their side tables. Big screens air different games and ads.
Fans kick back to watch games at Caesars Palace Race and Sports Book in Las Vegas.
George Rose/Getty Images

Inside the stadium, healthy options have traditionally been scarce and overpriced. A Sports Illustrated writer joked in 1966 that fans leave stadiums and arenas with “the same body chemistry as a jelly doughnut.”

Little seems to have changed since. One Gen Z fan I recently interviewed griped, “You might find one salad with a plain piece of lettuce and a quarter of a tomato.”

Eating away the anxiety and pain

The relationship between fandom and physical health isn’t just about guzzling beer, sitting for hours on end or scarfing down hot dogs.

One study analyzed sales from grocery stores. The researchers found that fans consume more calories – and less healthy food – on the day following a loss by their favorite team, a reaction the researchers tied to stress and disappointment.

My colleagues and I found something similar: Fandom induces what’s called “emotional eating.”

Emotions like anger, sadness and disappointment lead to stronger cravings. And this relationship is tied to how your favorite team performs when it matters most. For example, we found that games between rivals and closely contested games yield more pronounced effects. Emotional states generated by the game are also significantly correlated with increased beer sales in the stadium.

High-calorie cultures

In another paper, my co-authors and I found that fans often feel torn between their desire to make healthy choices and their commitment to being a “true fan.”

Every fan base develops its own culture. These unwritten rules vary from team to team, and they aren’t just about wearing a cheesehead hat or waving a Terrible Towel. They also include expectations around drinking, eating and lifestyle.

These health-related norms are shaped by a variety of factors, including the region’s culture, team history and even team sponsorships.

For example, the Cincinnati Bengals partner with Skyline Chili, a regional chain that makes a meat sauce that’s often poured over hot dogs or spaghetti. One Bengals fan I interviewed observed that if you attend a Bengals game, sure, you could eat something else – but a “true fan” eats Skyline.

I have two studies in progress that show how hardcore fans typically align their health behaviors with the health norms of their fan base. This becomes a way to signal their allegiance to the team, improve their standing among fellow fans, and contribute to what makes the fan base distinct in the eyes of its members.

Two shirtless fans, one wearing a cheesehead hat, another wearing a helmet with antlers. Both wear sashes made of sausage links.
Cheese and sausages are synonymous with Wisconsin – and being a fan of the state’s NFL team, the Green Bay Packers.
Jeff Haynes/AFP via Getty Images

In Buffalo, for example, tailgating often revolves around alcohol – so much so that Bills fans have a reputation for over-the-top drinking rituals.

And in New Orleans, Saints fans often link fandom to Louisiana food traditions. As one fan explained: “People make a bunch of fried food or huge pots of gumbo or étouffée, and eat all day – from hours before the game until hours after.”

A new generation of health-conscious fans

The fan experience is shaped by the culture in which it is embedded. Teams actively help shape these cultures, and there’s a business argument to be had for teams to play a bigger role in changing some of these norms.

Gen Z is strikingly health-conscious. They’re also less engaged with traditional fandom.

If stadiums and tailgates continue to revolve around beer and nachos, why would a generation attuned to fitness influencers and “fitspiration” buy in? To reach this market, I think the sports industry will need to promote its professional sports teams in new ways.

Some teams are already doing so. The British soccer team Liverpool has partnered with the exercise equipment company Peloton. Another club, Manchester City, has teamed up with a nonalcoholic beer brand as the official sponsor of its practice uniforms.

And several European soccer clubs have even joined a “Healthy Stadia” movement, revamping in-stadium food options and encouraging fans to walk and bike to the stadium.

For the record, I don’t think the solution is replacing typical fan foods with smoothies and salads. Alienating core consumers is generally not a sound business strategy.

I think it’s reasonable, however, to suggest sports teams might add more healthy options and carefully evaluate the signals they send through sponsorships.

As one fan I recently interviewed said: “The NFL has had half-assed efforts like Play 60” – a campaign encouraging kids to get at least 60 minutes of physical activity per day – “while also making a ton of money from beer, food and, back in the day, cigarette advertisements. How can sports leagues seriously expect people to be healthier if they promote unhealthy behaviors?”

Today’s consumers want to support brands that reflect their values. This is particularly true for Gen Zers, many of whom are savvy enough to see through hollow campaigns and quick to reject hypocrisy. In the long run, I think this type of dissonance – sandwiching a Play 60 commercial between ads for Uber Eats and Anheuser-Busch – will prove counterproductive.

Three people dressed up in hot dog costumes – one green, one red and one yellow – race during a baseball game.
Relish, ketchup and mustard ‘race’ during a September 2025 baseball game between the Kansas City Royals and Seattle Mariners, in an encapsulation kind of dissonance between showcasing both physical activity and junk food at sporting events.
Scott Winters/Icon Sportswire via Getty Images

I, as much as anyone else, understand what makes fandom special – and yes, I’ve eaten my share of wings during Bills games. But public health is a pressing concern, and though the sports industry is well-positioned to address this issue, fandom isn’t helping. Actually, my research suggests it’s having the opposite effect.

Striking the balance I’m advocating will be tricky, but the sports industry is filled with bright problem-solvers. In the film “Moneyball,” Brad Pitt’s character, Billy Beane, famously says sports teams must “adapt or die.” He was referring to the need for baseball teams to integrate analytics into their decision-making.

Professional sports teams eventually got that message. Maybe they’ll get this one, too.

The Conversation

Aaron Mansfield does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Wings, booze and heartbreak – what my research says about the hidden costs of sports fandom – https://theconversation.com/wings-booze-and-heartbreak-what-my-research-says-about-the-hidden-costs-of-sports-fandom-265158

Tribal colleges and universities aren’t well known, but are a crucial steppingstone for Native students

Source: The Conversation – USA (2) – By Cynthia Lindquist, Director of Tribal Initiatives & Collaborations, University of North Dakota

Navajo Technical University in Crownpoint, N.M., is the largest tribal university in the country. Blake Gumprecht/Flickr, CC BY

Most Native American high school students do not attend or graduate from college.

As a tribal member of Spirit Lake Nation in North Dakota and the former president of Cankdeska Cikana Community College in Fort Totten, North Dakota, I recognize the difference that tribal colleges and universities, like the one I used to work at, can have in rerouting Native students’ education journeys.

Tribal colleges and universities, or TCUs, are public institutions that are founded and run by a Native American tribe and focus on serving Native American students and communities.

The approximately 3.9 million Native Americans living in the U.S. have long recognized that TCUs are unique institutions that help Native students succeed in school and earn higher education degrees.

Most Americans, though, have no idea that tribal colleges and universities even exist, let alone know how they work.

A wooden sign on a quiet road with grass says 'Salish Kootenai College.'
Salish Kootenai College in Pablo, Mont., is one of 35 recognized tribal colleges and universities in the country.
U.S. Department of Education, CC BY

Understanding tribal colleges

TCUs enroll approximately 30,000 students each year, including some non-Native students. The median annual tuition at TCUs is US$3,572, making them more affordable than most other public universities.

There are 35 accredited TCUs across 13 states, including Montana, Arizona, Oklahoma, North Dakota and South Dakota. All of these schools are nonprofits.

While a single Native tribe sometimes sets up a tribal college, in other cases a consortium of tribes or the federal government helps establish a school.

Despite their differences, tribal colleges and universities all have the same mission of teaching Indigenous history, culture and languages.

All the tribal colleges also offer associate degrees and certifications. Twenty-two of them have only baccalaureate programs, and nine have master’s programs. Navajo Technical University, a tribal college in Crownpoint, New Mexico, which has the largest enrollment size of all the TCUs, began offering a first of its kind doctorate program in Diné Studies in 2024. This program focuses on the language, culture and history of the Diné people, also known as Navajo people.

Affordability has always been a consideration when TCUs set tuition and fees, since most are located on rural American Indian reservations with high unemployment and poverty rates, as well as few available jobs.

TCUs keep their tuition relatively low in part because a majority of their funding comes from the federal government. They also receive funding from philanthropic organizations.

TCUs also generally have minimal overhead costs, since most students live off-campus and only a handful of these colleges and universities offer on-campus housing. Most TCUs have both in-person and online courses.

While there is no single profile of a TCU student, I found that it is common to encounter a 30-year-old, single mother who works full time while trying to earn a college degree.

A growth in college enrollment

In 1968, just 181 Native Americans graduated from a four-year college.

That same year, the Navajo Nation established the first tribal college, then called the Navajo Community College, in Tsaile, Arizona. This school is now called Diné College.

Several factors prevented most Native American students from attending a college or university.

The cost of college was prohibitive, and many Native American students were also not adequately prepared for college in high school. These students and their families also feared that higher education could force them to assimilate into Western and white culture, and erase their own Native traditions and languages.

A long political relationship

When considering this historical context, it is important to understand that Native Americans have a unique relationship with the federal government.

Native Americans largely consider this relationship a political one, bound by the various legal precedents, federal policies and executive orders from the 1800s and onward. These orders and policies from the past several hundred years vary, but they often focus on questions of land, assimilation and the political independence of Native tribes.

There are also treaties and orders that focus on education and spell out the federal government’s responsibility to help coordinate and give money to support tribal education.

In 1978, Congress approved the Tribally Controlled Community College Assistance Act, which recognized tribal colleges as higher education institutions and established that the federal government would regularly help fund these schools.

Alongside the creation of new tribal colleges and universities over the past several decades, more and more Native people living on reservations have graduated from high school and received higher education degrees.

The percentage of Native college graduates rose 125% from 1990 to 2020. While 4.5% of Native students living on reservations received a college degree in 1990, that percentage rose to 10.3% with at least a college degree in 2020, according to findings by Harvard Kennedy School in September 2025.

Yet, unlike the high school trends, Native people still graduate college at a much lower rate than the general American population.

In 1990, 20.3% of all Americans had at least a college degree. In 2020, 34.3% of Americans had a college degree at a minimum, according to the Harvard Kennedy School findings.

A woman smiles at a cat that is resting on a cat bed, in a classroom with people seated nearby.
A professor at Navajo Technical University participates in a veterinary technology program conducted with the Department of Agriculture in 2019 in Crownpoint, N.M.
Flickr/U.S. Department of Agriculture, CC BY

A lasting impact

While tribal colleges and universities receive state and federal funding, they are chronically underfunded and often operate in survival mode. In some cases, they lack money to make needed repairs on campus buildings.

One major reason for this shortfall: While Congress agreed in the late 1970s to annually give tribal colleges $8,000 for each Native student they enroll, it has not met this financial and political commitment.

Tribal colleges annually receive $250 million less than what the federal government promised them, a 2024 ProPublica investigation found.

Tribal college and universities’ futures were cast in doubt in the spring of 2025, when the Trump administration announced a proposal to cut the Bureau of Indian Education’s annual budget from $183 million to $22 million. The Bureau of Indian Education is part of the Department of the Interior and oversees education for Native students.

But the Department of Education went on to announce in September that it would make a one-time, $495 million investment in historically Black colleges and universities and TCUs.

TCU leaders say they are still trying to understand the significance of this funding announcement and what it will result in.

I think it is important to recognize that TCUs make broad contributions to society, well beyond the impact they have on individual students.

TCUs teach entrepreneurship and business development and serve as pilot sites in launching businesses, for example.

For every federal dollar invested in tribal colleges, the schools return $1.60 in tax revenue through the increased tax payments of their alumni and their alumni’s employers, according to a September 2025 report by the American Indian Higher Education Consortium, a national organization that represents TCUs.

TCU alumni also generated $3.8 billion in added income, or gross domestic product, to the national economy from October 2022 through September 2023.

These schools offer a unique pathway for Native students to attend a higher education institution, while teaching them the skills they need to build a stable career.

The Conversation

I served as President of Cankdeska Cikana Community College (CCCC) one of the 34 tribal colleges located in North Dakota and that is affiliated with AIHEC. I am a member of the Spirit Lake Dakota Tribe who chartered CCCC in the 1970s. As a tribal college President, I served on the AIHEC Board of Directors and its Executive Committee.

ref. Tribal colleges and universities aren’t well known, but are a crucial steppingstone for Native students – https://theconversation.com/tribal-colleges-and-universities-arent-well-known-but-are-a-crucial-steppingstone-for-native-students-261222

More young adults are living with their parents than previous generations did

Source: The Conversation – USA (2) – By Rohan Shah, Assistant Professor of Economics, University of Mississippi; Institute for Humane Studies

Welcome back: The number of young adults living with their parents has risen by 1.5 million over the past decade. Maskot/DigitalVision via GettyImages

A potentially worrisome trend is emerging among young adults. Instead of landing a job and moving to the big city after graduation, many are moving back into their childhood homes instead. About 1.5 million more adults under 35 live with their parents today than a decade ago. That’s a 6.3% jump, more than double the rate of growth for the young adult population overall.

The issue is affordability. Over the past decade, urban rents have climbed about 4% per year, while wages for full-time workers have increased by only 0.6% annually. That means it’s harder than ever to live in a big city on the typical salary – especially if you’re a new graduate without much work experience.

The situation is even more challenging for aspiring homeowners: The median house price in the U.S. has risen about 90% in just 10 years, or more than 6% each year. And as prices rise – the median home sells for more than $400,000 now – so too do the ages of homebuyers. The median first-time U.S. homebuyer is 38 years old, up from 31 about a decade ago.

Why is the rent so high?

Put simply, there isn’t enough housing. As an economist, I know that when demand rises faster than supply, prices have to increase. And supply is severely limited in the places where people most want to live: big cities such as New York and San Francisco.

In most of these cities, planning and zoning laws prevent developers from building enough to meet demand. For example, rezoning a plot of land from commercial to residential often requires mountains of paperwork. And in many cities, objections from neighbors can stall a proposed development. These are just two of many obstacles local governments throw in homebuilders’ way.

One city that has tried something different is Austin, Texas. After deliberately relaxing its zoning laws a few years ago, Austin has seen a boom in home construction. Rents fell by 10% in one year and by as much as 22% in two years after that change. By making it easier to build, Austin has made it cheaper to live there.

I don’t think it’s a coincidence that Austin has a far lower share of its young adults living with their parents than many other cities do. Just 6% of working adults in the Austin metro area live with their parents, one analysis found, versus nearly 14% in Greater San Antonio and 20% in Greater Los Angeles.

The pros and cons of living with the ’rents

One obvious advantage of living with parents is that they tend to charge below-market rents, or nothing at all. That makes it easier to save for a deposit on a house, helping young adults get on the property ladder sooner than they would otherwise. Indeed, homeownership rates among those 25 to 34 have risen slightly since 2016.

There are also potential disadvantages, however, particularly when it comes to socializing. Living at home with parents can make it much more challenging to meet new people. This, in turn, could partly help explain why Americans are getting married and having children later in life. These delays might not seem important, but they can leave people feeling like they’re behind in life, which can affect their health and well-being.

I also wonder whether living with parents is indirectly making young adults unhappier at work. That’s because older adults often live far from the urban centers where young people are most likely to find jobs directly related to their degrees. Job satisfaction rates are substantially lower among 18- to 29-year-olds than among the rest of the working population.

A problem for the entire US

The housing shortage isn’t just an issue for young adults. A recent analysis I found insightful was headlined “The housing theory of everything.” It argued that the issue helps explain at least part of the current malaise in the U.S. economy.

For example, when people can’t live and work where they want, they’re unable to use their talents fully. That contributes to the relatively slow productivity growth the U.S. has experienced in recent years.

Similarly, if people can’t live in areas where they might meet and work with like-minded individuals, they have fewer opportunities to share ideas, which can hinder innovation.

And if the housing shortage is indeed encouraging young adults to delay having children, it could make it harder for the U.S. to fund Social Security and other government programs in the future.

Making it easier to build new homes in places people want to live and work could go a long way to easing these problems. It’s possible high rents translate into high barriers to adulthood, too.

The Conversation

I am acquaintances with the authors of the article “The Housing Theory of Everything.”

ref. More young adults are living with their parents than previous generations did – https://theconversation.com/more-young-adults-are-living-with-their-parents-than-previous-generations-did-264570

Even small drops in vaccination rates for US children can lead to disease outbreaks

Source: The Conversation – USA (3) – By David Higgins, Assistant Professor of Pediatrics, University of Colorado Anschutz Medical Campus

Xerius Jackson, age 7, gets an MMR vaccine during the Texas measles outbreak in March 2025. Jan Sonnenmair via Getty Images

More than three-quarters of U.S. counties and jurisdictions are experiencing declines in childhood vaccination rates, a trend that began in 2019, according to a September 2025 NBC News–Stanford University investigation. The report also found a “large swath” of the U.S. no longer has the “basic, ground-level immunity” needed to stop the spread of measles.

Dr. David Higgins, an assistant professor of pediatrics at the University of Colorado CU Anschutz Medical Center and a pediatrician who researches vaccines, discusses the dangers of not vaccinating your children.

Dr. David Higgins discusses back-to-school vaccinations.

The Conversation has collaborated with SciLine to bring you highlights from the discussion, edited for brevity and clarity.

What vaccines are typically required for schoolchildren, and why?

David Higgins: The vaccine requirements for kids to attend school are set by states, not the federal government. Most states require kindergartners get vaccines for pertussis – that’s whooping cough – and tetanus, measles, mumps, rubella and chickenpox.

For older kids, a booster of the tetanus and pertussis vaccine is typically required, as well as a vaccine for meningococcal disease.

Vaccines reduce the risk of outbreaks in places where transmission of these diseases is easy. Not only do vaccinations help keep both students and teachers safe, it also encourages overall higher community coverage for these vaccines.

How do scientists track the safety of vaccines over time?

Higgins: Before vaccines are approved, they undergo rigorous trials. During this process, scientists look at the safety and effectiveness of the vaccine, testing it first in small groups to assess safety, then in larger groups to confirm protection and detect uncommon side effects. That process continues after the vaccine is approved. Those systems continually monitor the safety of vaccines, both here in the U.S. as well as around the world.

What are the vaccination coverage trends for kindergartners?

Higgins: What we have seen is a small downward trend since 2019, the year prior to the COVID-19 pandemic. It slipped from 95% of new kindergartners being up to date on many of their routine vaccines to about 92%.

That’s a small percentage decrease, so a great majority of parents are still vaccinating their kids. But at the same time, anything below our target of 95% for diseases like measles becomes a problem, because that’s below the level that’s needed for what we call herd immunity, or community immunity. When that happens, it’s not a matter of if, but when, we see an outbreak of these infectious diseases.

And while nationwide rates are important to look at, outbreaks happen at local community levels. For example, earlier this year, an outbreak of measles in West Texas spread rapidly through communities where vaccination rates had slipped well below the state average.

So, the vaccination rate at your own school or community is much more meaningful than what the national vaccination rate is.

How do non-medical vaccine exemptions work?

Higgins: First, actual medical exemptions are rare, and these occur when the vaccine is unsafe for the child to receive, like when he or she has a known severe allergic reaction to vaccine ingredients.

Non-medical exemptions for vaccines are often for religious, personal or philosophical reasons. They have been increasing for the past several years, rising from the range of 1 to 2% up to 3.6% in the 2024–25 school year. That’s a small increase, but again, it’s still concerning.

{What are some reasons why parents are} Why are some parents vaccine hesitant?

Higgins: There are multiple reasons. These include misinformation which algorithm-driven echo chambers on social media can spread at an alarming rate right now. Also, Americans report less trust in institutions and experts, and studies have found growing partisanship around vaccines.

Additionally, vaccines are victims of their own success. They have worked so well that many diseases like polio aren’t routinely seen anymore. That might lead a parent to think the risk for their child is so low that the vaccine is not necessary. But the fact is, vaccines are simply holding these diseases at bay. And as vaccination rates drop, these diseases will come back and more kids will be at risk.

What advice do you have for parents?

Higgins: The most important thing you can do as a parent is to keep your kids up to date on required vaccines. That includes the annual flu shot. Follow your state’s requirements and current recommendations from trusted sources like the American Academy of Pediatrics and your own personal pediatrician to know which vaccines your child should have.

You also want to reinforce other common sense approaches to keeping your children healthy. Make sure they know how to wash their hands properly and that they stay home when they’re sick. Teach them to sneeze and cough into their elbow instead of into their hands – even though doing so isn’t a perfect solution.

As a pediatrician, I love when my families come and talk to me about their concerns. I help them walk through their worries so they can feel more confident that they’re making a truly informed decision that’s in the best interest of their child’s health.

SciLine is a free service based at the American Association for the Advancement of Science, a nonprofit that helps journalists include scientific evidence and experts in their news stories.

The Conversation

David Higgins is a member of the American Academy of Pediatrics. He is also on the board of directors (volunteer) for Immunize Colorado.

ref. Even small drops in vaccination rates for US children can lead to disease outbreaks – https://theconversation.com/even-small-drops-in-vaccination-rates-for-us-children-can-lead-to-disease-outbreaks-265555

From the pulpit to the picket line: For many miners, religion and labor rights have long been connected in coal country

Source: The Conversation – USA (3) – By Richard J. Callahan, Jr., Associate Professor of Religious Studies, Gonzaga University

Harlan County is the heart of eastern Kentucky’s coal region. Scott Olson/Getty Images

In October 2025, Cecil Roberts will officially retire from his role as president of the United Mine Workers of America. A sixth-generation coal miner, he has led the union for 30 years. Only one man held the role longer: John L. Lewis, whom many consider one of the most important labor leaders of the 20th century.

Roberts has seen the union through an especially difficult period for the coal industry and grew up immersed in it. He was raised in Cabin Creek, West Virginia, where his great-grandmother – an activist in her own right – let miners camp on her property during a legendary strike in 1912. Bill Blizzard, his great-uncle, led miners during the Battle of Blair Mountain, the largest labor uprising in U.S. history. Both of his grandfathers died in mine accidents.

And there’s another way Roberts is steeped in Appalachian history: Before an audience of workers, observers have often noted, he speaks like a preacher. Roberts likens miners’ struggles to biblical stories, references the power of God and the teachings of Jesus, and speaks in the dynamic cadences found in an Appalachian church.

A man with white hair raises his arms as he speaks animatedly at a podium, while he and other men nearby wear camo-colored t-shirts.
United Mine Workers of America President Cecil Roberts speaks to about 4,000 retired members in Lexington, Ky., on June 14, 2016.
AP Photo/Dylan Lovan

“Be like Jesus,” he told a rally in Charleston, West Virginia, in 2015, opposing a “right to work” bill that allowed workers in union-run shops to opt out of paying dues. “Jesus saw the money changers in the temple, and Jesus drove the money changers from the temple. So let me tell the National Right to Work Committee, the Chamber of Commerce, the Koch Brothers, and all those who gave money: you got your money’s worth, but we’re not for sale in West Virginia.”

“How many of you have been to a Baptist church? We’re going to take up a collection. It is altar call time,” he continued. “Now, I’m going to ask you something: Are you fed up? Let me hear you say, ‘Fed up.’… Are you so fed up that you are now fired up? Let me hear you say, ‘Fired up!’”

Capping off the rousing call-and-response, he shouted, “God bless all of you, you’re the salt of the earth!”

Roberts’ style is a glimpse into a bigger story. For over a century, coal has transformed central Appalachia: from the shape of the landscape to place names, and from folk music and crafts to economic conditions.

All the while, religion has been transforming in the mountains, too. Labor and religion are deeply entangled here – a subject I explored in my book “Work and Faith in the Kentucky Coal Fields: Subject to Dust.”

‘Railroad religion’

In the 1880s, two groups rushed into the central Appalachian Mountains: industrialists seeking coal, and missionaries seeking moral reform. Both changed the region forever, and their stories were intertwined.

At the time, central Appalachia was widely depicted in the popular press as a backward, ignorant region whose mountainous terrain kept its people isolated, outside the flow of progress – a stereotype still common today. Equating economic progress with moral progress, many Americans assumed that developing industry would lift people out of what they perceived as fatalism and superstition.

The coal industry used this idea to promote its rapid exploitation of mountain resources. Companies built railroads to connect the region to the national market, developed industrial coal mines and reshaped the central Appalachian economy. Missionaries opened churches, schools and camps.

A black and white photo of a settlement on a small hill along a river.
Henry Ford founded Twin Branch, W.Va. – shown here in the 1920s – as a town for coal miners.
Bettmann via Getty Images

Company-owned coal towns encompassed miners’ lives. People who had long farmed for themselves and lived, as the Bible told them to, “by the sweat of their brow,” became dependent upon coal companies as mine development shrank the size of family farms. Not only did employers own the miners’ houses, but they also paid workers in “scrip,” which was redeemable only at the company store.

Many company towns included theaters, offered films and music, and even built churches and paid pastors’ salaries. These were typically mainline Protestant churches, such as Methodist or Presbyterian.

To some Appalachian natives, these denominations were known as “railroad religion” because of the way they entered the mountains. And, for many miners, these were the churches of management. When there was labor unrest, the coal town churches tended to side with the companies, advising miners against strikes or agitation.

Faith and action

The churches of most miners born in central Appalachia, meanwhile, were in the mountain communities – independent Baptist or Holiness congregations whose pastors were usually miners themselves.

Pastors preached about the dangers and sacrifices miners faced deep underground, in an age of few regulations. God was on the side of the oppressed and downtrodden, they stressed – and those who gained at others’ expense would ultimately face divine judgment.

Their passionate preaching was meant to inspire action, whether it was committing one’s life to Jesus or to the union. Labor rights were deeply understood as religious issues, rooted in Christian concerns for justice and care.

John Sayles’ 1987 film “Matewan” powerfully depicted the divided role that religion played in West Virginia’s coalfields. One preacher, played by Sayles, equates the union with “the Prince of Darkness.” Another, a young miner, advocates in biblical terms for the union’s righteousness and helps to lead a strike. The result was the Matewan Massacre of 1920: a bloody battle between miners and armed guards hired by the mine owners.

Miner preachers and independent churches were central to the organization of miners in eastern Kentucky in the 1930s, too, during another period of violence between mine operators and miners over conditions, wages and unionization. It was during this time that miner’s wife and singer Sarah Ogan Gunning penned “Dreadful Memories,” turning the traditional hymn “Precious Memories” into a visceral depiction of miners’ struggle and a call for unionization:

“Dreadful memories, how they linger,
How they ever flood my soul.
How the workers and their children
Died from hunger and from cold.”

A black and white photo of several men in slacks and shirts standing outside a small white building.
Miners in Harlan County, Ky., arrive at the Pentecostal Church of God building for a union meeting in 1946.
Department of the Interior/National Archives at College Park via Wikimedia Commons

Looking to the future

Today, it is still not surprising to find religious – particularly Christian – rhetoric in labor organizing. United Auto Workers President Shawn Fain is another example of a union leader whose speeches draw from the Bible.

But the dynamics of religion and class forged by industrial mining have shaped central Appalachia’s culture in lasting ways particular to the coalfields. The history of labor struggle, infused with religious idioms, is a source of identity and values evident in everything from union meetings in churches to prayers on picket lines.

Today, the United Mine Workers of America is focused less on coal itself, which miners know cannot last forever. The union represents members in other sectors, too, including public employees, manufacturing, health care and employees of the Navajo Nation. It has also focused its work on an equitable transition to renewable energy: one that accounts for the economic, cultural and environmental destruction that a single-industry economy has wreaked on central Appalachia.

A black wall with paler silhouettes of men standing along it, positioned above a low stone wall next to the road.
A memorial in Whitesville, W.Va., honors the 29 miners killed in a 2010 explosion in Massey Energy’s Upper Big Branch coal mine in nearby Montcoal.
Kristian Thacker for The Washington Post via Getty Images

Likewise, the United Mine Workers of America has fought to hold coal companies to their pension and health care obligations toward retired and sick miners whose work fueled the country and made companies rich.

And that struggle, Roberts would say, is a religious one as well.

The Conversation

Richard J. Callahan, Jr. does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. From the pulpit to the picket line: For many miners, religion and labor rights have long been connected in coal country – https://theconversation.com/from-the-pulpit-to-the-picket-line-for-many-miners-religion-and-labor-rights-have-long-been-connected-in-coal-country-262472

Pour la cueillette des champignons, ne vous fiez pas aux applis pour les identifier

Source: The Conversation – in French – By Jérémy Hamon, Chargé d’études en toxicovigilance – Direction des alertes et des vigilances sanitaires, Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail (Anses)

Depuis le 1er juillet 2025, 500 intoxications dues à la cueillette et à la consommation de champignons sont déjà à déplorer en France. On observe une augmentation des cas depuis le début du mois de septembre, et un pic est attendu en octobre. Pour identifier les champignons avec certitude, l’Agence nationale de sécurité sanitaire rappelle qu’il ne faut pas se fier aux applications sur smartphone, en raison du risque élevé d’erreurs. On fait le point sur l’ensemble de ces recommandations de l’Anses.


En France, plus de 3 000 espèces de champignons dits « supérieurs » ou « macromycètes » sont recensées. Si les champignons sont des aliments appréciés, certaines espèces sont toxiques voire mortelles pour l’humain. Ainsi la confusion entre une espèce comestible et une espèce toxique peut conduire à une intoxication, parfois grave.

Les intoxications par ingestion de champignons peuvent aussi résulter de la consommation de champignons réputés comestibles contaminés par des microorganismes (bactéries, parasites…), par des polluants chimiques ou bien parce qu’insuffisamment cuits.

Avant la cueillette, les bonnes pratiques à suivre :

  • Prévoir un panier en osier, une caisse ou un carton pour déposer ses champignons. Sa taille doit être suffisamment grande pour séparer les différentes espèces. Surtout, ne jamais utiliser de sacs en plastique, ils accélèrent le pourrissement ;
  • Choisir un lieu de cueillette loin des sites pollués (bords de route, aires industrielles, décharges, pâturages) ;
  • Se renseigner sur les structures qui peuvent aider à identifier une cueillette en cas de doute : certains pharmaciens ou les associations de mycologie de votre région.

Une surveillance saisonnière par les autorités de santé

L’Agence nationale de sécurité sanitaire de l’alimentation, du travail et de l’environnement (Anses) réalise chaque année, depuis 2016, une surveillance des intoxications accidentelles par ingestion de champignons.

Du fait de leur caractère saisonnier, de la température et de l’humidité conditionnant la pousse des champignons, cette surveillance des intoxications a lieu du 1er juillet au 31 décembre. L’Anses suit ainsi chaque semaine, avec l’appui du réseau des centres antipoison (CAP), le nombre d’intoxications qui leur est rapporté.

Chaque saison, entre 11 et 41 personnes intoxiquées ont un pronostic vital engagé, et entre 0 et 5 personnes intoxiquées décèdent.

Près de 4 % des intoxications enregistrées par les centres antipoison

Comme chaque année en septembre, le rapport d’étude « Intoxications accidentelles par des champignons en France métropolitaine » de l’Anses dresse le bilan de la saison passée.

Pour la saison 2024, le nombre d’intoxications (1 363) était légèrement inférieur à celui de 2023, mais sensiblement égal à ceux de 2021, de 2020 et de 2017. Le nombre de cas graves (41) était l’un des trois plus élevés (avec 2021 et 2017) depuis 2016 ; et le pourcentage de cas graves était d’environ 3 %, soit le deuxième pourcentage le plus haut, après 2021, depuis 2016 également. Le pic mensuel d’intoxications pour la saison 2024 est survenu en octobre, comme pour la plupart des années précédentes.

Depuis le début de la surveillance saisonnière en 2016, le nombre d’intoxications par an varie d’une année à l’autre, mais ne suit pas de tendance particulière (figure ci-dessous). Depuis 2017, ce nombre est supérieur à 1 000 et représente environ 4 % de l’ensemble des intoxications accidentelles enregistrées par les CAP.

Intoxications accidentelles par des champignons observés par les centres antipoison (CAP), de 2016 à 2024

Un questionnaire spécifique pour améliorer la prévention

Depuis 2022, un questionnaire de recueil spécifique est soumis à chaque personne appelant un CAP à la suite de la consommation de champignons dans un contexte alimentaire et présentant des symptômes. Ce questionnaire a pour but d’améliorer la connaissance des circonstances des intoxications et de cibler plus efficacement les messages de prévention. Les nouvelles données, ainsi récoltées, concernent le mode d’obtention des champignons, les espèces de champignons recherchées au cours de la cueillette, le mode d’identification, le mode de transport et le temps de conservation des champignons ainsi que le mode de consommation des champignons.

Ce questionnaire a permis de mettre en évidence, entre autres, les champignons les plus souvent recherchés. En 2022 et en 2023, les personnes intoxiquées ont déclaré qu’il s’agissait de cèpes (ou bolets), de coulemelles (ou lépiotes), et d’agarics champêtres (aussi appelés « rosés des prés »).

Pour la saison 2024, et probablement parce que la pousse des bolets et des agarics semble s’être arrêtée plus tôt que d’autres années, les rendant ainsi moins disponibles à la cueillette, ce sont les girolles (ou chanterelles) qui étaient les plus recherchées au cours de l’ensemble de la saison (et, plus particulièrement, à partir de la deuxième semaine d’octobre).

Cette différence a conduit à un nombre plus important de confusions avec des pleurotes de l’olivier (Omphalotus olearius) et des faux clitocybes lumineux (Omphalotus illudens), qui sont toxiques.

Pendant la cueillette, comment bien identifier les champignons ?

  • Ne pas se fier aux applications de reconnaissance sur smartphone, en raison du risque élevé d’erreurs d’identification ;
  • Ne ramasser que les champignons que vous connaissez parfaitement. Attention ! Des champignons vénéneux peuvent pousser à l’endroit où vous avez cueilli des champignons comestibles une autre année ;
  • Cueillir uniquement les spécimens en bon état et prélever la totalité du champignon (pied et chapeau) afin d’en permettre l’identification ;
  • Éviter de ramasser les jeunes spécimens qui n’ont pas fini de se former, ce qui favorise les confusions, et les vieux spécimens qui risquent d’être abîmés ;
  • Au moindre doute sur l’état ou sur l’identification d’un des champignons récoltés, ne pas consommer la récolte avant de l’avoir fait contrôler par un pharmacien ou par une association de mycologie.

Ressemblance entre espèces toxiques et espèces réputées comestibles

Depuis 2022, les autres espèces toxiques les plus souvent identifiées par les experts mycologues qui font partie d’un réseau national les mettant en relation avec les centres antipoison, étaient les agarics jaunissants, les lépiotes des jardins (ou lépiotes vénéneuses), les entolomes livides, les bolets Satan ou encore les amanites phalloïdes.

Ces espèces toxiques peuvent être mises en regard des espèces les plus recherchées : les agarics jaunissants et les amanites phalloïdes peuvent, en effet, être confondues avec des agarics champêtres, les bolets Satan peuvent être confondus avec des espèces de bolets comestibles, et les lépiotes des jardins avec des coulemelles.

Liste des espèces recherchées par les cueilleurs versus les espèces toxiques de champignons cueillis (identifiés par un expert mycologue), pour la saison 2024

Source : Sicap. Tableau extrait d’« Intoxications accidentelles par des champignons en France métropolitaine. Bilan des cas enregistrés par les centres antipoison entre le 1er juillet et le 31 décembre 2024 », Rapport d’étude de toxicovigilance, septembre 2025, Anses.
Groupe d’espèces recherchées Espèce toxique cueillie (identifiée par un expert mycologue)
Agarics champêtres, rosés des prés Agaric jaunissant (Agaricus xanthodermus)
Amanites des Césars (oronge) Amanite tue-mouches (Amanita muscaria)
Cèpes ou bolets non précisés Bolet Satan (Rubroboletus satanas)
Coulemelles, lépiotes Lépiote des jardins (Chlorophyllum brunneum), amanite phalloïde (Amanita phalloides)
Girolles, chanterelles Clitocybe de l’olivier (Omphalotus olearius), faux clitocybe lumineux (Omphalotus illudens)
Mousserons, faux mousserons (marasmes des oréades) Lépiote de Josserand (Lepiota josserandii), galère marginée (Galerina marginata)

Ci-dessous, composition de trois espèces de champignons toxiques, après expertise par des experts mycologues

(Avertissement : ces photographies n’ont pas vocation à être utilisées pour une identification de champignons, ndlr.)

Composition de trois espèces de champignons toxiques
En haut : Amanite phalloïde (Amanita phalloides) ; en bas à gauche : Bolet Satan (Rubroboletus satanas) ; en bas à droite : Clitocybe de l’olivier appelé aussi Pleurote de l’olivier (Omphalotus olearius).
(Holger Krisp/Antonio Abbatiello), CC BY

Certaines espèces toxiques de champignons peuvent ressembler fortement à des espèces comestibles. L’identification de l’espèce du champignon cueilli est donc une étape indispensable et très importante pour le cueilleur, et doit être réalisée par des personnes expertes sur le sujet (mycologue ou association de cueilleurs experts, par exemple). Les applications ou les fonctionnalités de reconnaissance d’image directement disponibles sur certains smartphones ne sont actuellement pas suffisamment performantes pour identifier correctement un champignon, et leur utilisation est donc déconseillée car sujette à des erreurs.

Enfin, le questionnaire disponible depuis 2022 a permis de mettre en évidence qu’environ les trois quarts des personnes intoxiquées n’avaient pas fait identifier leur cueillette. Une grande partie de ces intoxications auraient probablement pu être évitées si la cueillette avait fait l’objet d’une identification, idéalement par un expert mycologue ou par une association spécialisée.

Après la cueillette : quels gestes adopter ?

  • Se laver soigneusement les mains ;
  • Prendre une photo de votre récolte avant la cuisson : elle sera utile en cas d’intoxication pour décider du traitement adéquat ;
  • Conserver les champignons en évitant tout contact avec d’autres aliments au réfrigérateur (maximum 4 °C) et les consommer dans les deux jours qui suivent la cueillette ;
  • Ne jamais consommer les champignons crus, et cuire chaque espèce séparément et suffisamment longtemps : de 20 à 30 minutes à la poêle ou 15 minutes à l’eau bouillante avec rejet de l’eau de cuisson ;
  • Consommer les champignons en quantité raisonnable, soit 150 à 200 grammes par adulte et par semaine ;
  • Ne jamais proposer de champignons cueillis à de jeunes enfants ;
  • Ne pas consommer de champignon identifié au moyen d’une application de reconnaissance de champignons sur smartphone en raison du risque élevé d’erreur.

En moyenne, 2 % des intoxications par des champignons sont graves

Si la plupart des intoxications sont bénignes, reste qu’il est possible d’atteindre jusqu’à 41 « intoxications graves » par saison (soit un maximum de 3,2 % des intoxications saisonnières ; la moyenne étant de 2 % de 2016 à 2024).

Les intoxications sont considérées comme graves lorsque le pronostic vital du patient est engagé. Parmi ces intoxications graves, certaines sont mortelles et d’autres peuvent conduire à des insuffisances rénales ou hépatiques sévères devant parfois nécessiter une transplantation d’organe.

Les espèces toxiques de champignons ne produisent pas toutes les mêmes toxines et conduisent donc à des intoxications présentant des symptômes différents. L’ensemble de ces symptômes permet de déterminer le type de syndrome mycotoxique.

Concernant les intoxications graves, les syndromes mycotoxiques les plus fréquents sont les syndromes phalloïdien, orellanien et sudorien :

  • Le syndrome phalloïden, principalement causé par les amanites toxiques (amanite phalloïde et amanite vireuse, par exemple) et certaines petites lépiotes toxiques, est caractérisé par des symptômes digestifs suivis d’une atteinte hépatique pouvant être gravissime et conduire à une greffe de foie ;

  • Le syndrome orellanien, principalement causé par le cortinaire très joli et le cortinaire des montagnes, est caractérisé par des symptômes digestifs inconstants puis une atteinte rénale d’apparition plus tardive (entre 2 et 20 jours après l’ingestion du champignon) ;

  • Le syndrome sudorien, principalement causé par certains clitocybes blancs (clitocybe blanchi et clitocybe cérusé, par exemple), par un grand nombre d’inocybes et certains mycènes, est caractérisé par des troubles digestifs associés à des sueurs, à des larmoiements, à un myosis (diminution de la taille de la pupille) et à une diminution de la fréquence cardiaque et de la tension artérielle.

Prévention et recommandations

L’Anses diffuse chaque année, au moment des périodes de pousse et de cueillette des champignons, des messages de prévention dans la presse, sur les réseaux sociaux et dans certains établissements (les pharmacies, par exemple).

Si la diffusion de ces messages est nécessaire pour informer la population des recommandations nationales de cueillette et de consommation des champignons, des relais locaux (associations de mycologues, pharmaciens…) restent indispensables pour aider à identifier la cueillette et, ainsi, pour limiter le nombre d’intoxications.

Enfin, pour prendre en compte les intoxications dues aux champignons sauvages conservés au congélateur (et consommés entre janvier et juillet) ainsi qu’à certaines espèces printanières, la surveillance des intoxications aux champignons couvre l’année entière (de janvier à décembre) depuis janvier 2025.

The Conversation

Les auteurs ne travaillent pas, ne conseillent pas, ne possèdent pas de parts, ne reçoivent pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’ont déclaré aucune autre affiliation que leur organisme de recherche.

ref. Pour la cueillette des champignons, ne vous fiez pas aux applis pour les identifier – https://theconversation.com/pour-la-cueillette-des-champignons-ne-vous-fiez-pas-aux-applis-pour-les-identifier-266275

Dodo 2.0 : à quel point sommes-nous proches du retour de cet oiseau disparu ?

Source: The Conversation – France in French (2) – By Timothy Hearn, Lecturer, University of Cambridge; Anglia Ruskin University

Peut-on vraiment faire revenir le dodo ? Colossal Biosciences s’en rapproche grâce à l’édition génétique, mais le projet se heurte à d’énormes défis scientifiques et écologiques.


La société américaine de biotechnologie Colossal Biosciences affirme être enfin parvenue à maintenir en vie, suffisamment longtemps en laboratoire, des cellules de pigeon pour pouvoir en modifier l’ADN – une étape cruciale vers son rêve de recréer le dodo.

L’entreprise a réussi à cultiver des « cellules germinales primordiales » – des cellules embryonnaires précoces – provenant de pigeons de Nicobar, les plus proches parents vivants du dodo, et à les faire vivre pendant plusieurs semaines d’affilée. C’est une avancée que les spécialistes de la génétique des oiseaux poursuivent depuis plus de dix ans. Mais la véritable valeur de cette percée réside dans son potentiel à protéger des espèces encore existantes.

Des recherches sur le poulet

Selon Colossal Biosciences, ces cellules, une fois modifiées, pourraient être introduites dans des embryons de poulets eux-mêmes édités génétiquement, transformant ces derniers en mères porteuses pour des oiseaux disparus depuis plus de trois siècles. Cette percée s’accompagne d’un calendrier audacieux. Ben Lamm, le directeur général de Colossal Biosciences, affirme que les premiers « néo-dodos » pourraient éclore d’ici cinq à sept ans.

Il évoque aussi un objectif à plus long terme : relâcher plusieurs milliers d’oiseaux sur des sites de l’île Maurice protégés de tout prédateur, là même où vivaient les dodos avant leur disparition. Cette promesse a contribué à faire grimper la valorisation de la start-up au-delà de dix milliards de dollars, selon le site de l’entreprise.

Presque tout ce que l’on sait sur l’édition génétique des oiseaux vient des recherches menées sur le poulet, dont les cellules germinales – à l’origine des spermatozoïdes et des ovules – se développent sans difficulté dans des cultures de laboratoire classiques. Les cellules de pigeon, elles, meurent généralement en quelques heures en dehors de leur organisme.

Colossal Biosciences affirme avoir testé plus de 300 combinaisons de facteurs de croissance – des substances qui stimulent la multiplication cellulaire – avant d’en trouver une réellement efficace. Ces cellules peuvent désormais être chargées de fragments d’ADN reconstitués et d’interrupteurs moléculaires contrôlant la forme du crâne, la taille des ailes et la masse corporelle.

Des zones manquantes

Si les modifications prennent, ces cellules altérées migreront vers les ovaires ou les testicules d’un embryon de poulet encore à un stade précoce de développement, de sorte que l’animal adulte pondra des œufs ou produira du sperme porteur du génome modifié.

Ce procédé pourrait donner naissance à un oiseau qui ressemble à un dodo, mais la génétique ne raconte qu’une partie de l’histoire. Le génome du dodo a été reconstitué à partir d’os et de plumes conservés dans des musées, et les zones manquantes ont été comblées avec de l’ADN de pigeon ordinaire.

Parce que l’espèce est éteinte et ne peut plus être étudiée, on ignore encore largement les gènes impliqués dans son comportement, son métabolisme ou ses défenses immunitaires. Reconstituer les régions connues de son ADN, lettre par lettre, nécessiterait des centaines de modifications distinctes. Le travail à accomplir serait d’une ampleur sans précédent, bien au-delà de tout ce qui a été tenté dans les programmes de sélection agricole ou de recherche biomédicale, même si Colossal Biosciences semble prête à investir massivement pour y parvenir.

Squelette de dodo exposé, avec un enfant en arrière-plan
Squelette de dodo.
Lobachad/Shutterstock

Reste aussi la question du poulet porteur. Un œuf de poule pèse bien moins qu’un œuf de dodo. Dans les collections muséales, il n’existe qu’un seul œuf de dodo connu, d’une taille comparable à celle d’un œuf d’autruche. Même si un embryon parvenait à survivre aux premiers stades, il dépasserait rapidement la taille de la coquille et devrait éclore avant d’être complètement formé – comme un prématuré nécessitant des soins intensifs. Le poussin devrait donc recevoir une surveillance et des soins constants pour atteindre le poids historique du dodo, estimé entre 10 et 20 kilos.

« Remplacement fonctionnel »

Des poules « génétiquement réinitialisées », modifiées par édition du génome, ont déjà pondu avec succès des œufs appartenant à des races rares de poulets, démontrant que la gestation croisée par cellules germinales fonctionne en principe. Mais appliquer cette technique à une espèce disparue et de taille bien supérieure reste totalement inédit.

C’est pour ces raisons que de nombreux biologistes préfèrent parler de « remplacement fonctionnel » plutôt que de « désextinction ». Ce qui pourrait éclore serait un hybride : principalement un pigeon de Nicobar, enrichi de fragments d’ADN de dodo et incubé dans un œuf de poule. Mais parler de résurrection relève davantage du marketing que de la science.

Les promesses et la réalité

La tension entre promesse et réalité a marqué les précédents projets de Colossal Biosciences. Les loups sinistres (Aenocyon dirus) présentés en août 2025 se sont révélés être des clones de loups gris avec quelques modifications génétiques. Des experts en conservation ont averti que ce type d’annonces peut inciter la société à considérer l’extinction comme réversible, réduisant ainsi le sentiment d’urgence à protéger les espèces menacées.

Malgré tout, la percée réalisée sur les pigeons pourrait profiter aux espèces encore vivantes. Environ un oiseau sur huit est aujourd’hui menacé d’extinction, selon l’évaluation mondiale de 2022 de BirdLife International. La culture de cellules germinales offre un moyen de préserver la diversité génétique sans avoir à maintenir d’immenses populations captives, et éventuellement de réintroduire cette diversité dans la nature.

Si la technique s’avère sûre chez les pigeons, elle pourrait aider à sauver des oiseaux en danger critique, comme l’aigle des Philippines ou le perroquet à ventre orange d’Australie. La population sauvage de ce dernier ne compte plus qu’environ 70 individus et avait même chuté à seulement 16 en 2016.

Une porte-parole de Colossal Biosciences a déclaré que l’entreprise respecte ses jalons scientifiques, mais que l’obtention d’éléphants mères porteuses et de cellule-œuf appropriés pour leur projet de mammouth laineux « implique une logistique complexe échappant à notre contrôle direct » et que « nous accordons la priorité au bien-être animal, ce qui signifie que nous ne précipitons aucune étape cruciale ».

Elle a ajouté que, selon les recherches de l’entreprise, les travaux de désextinction accentuent au contraire l’urgence de protéger les espèces menacées. « L’important, c’est que nous ne remplaçons pas les efforts de conservation existants, nous y ajoutons de nouvelles ressources et renforçons l’implication du public », a-t-elle précisé.

Un dodo irrécupérable

« Notre travail apporte des financements entièrement nouveaux à la conservation, provenant de sources qui n’investissaient pas auparavant dans la protection de la biodiversité. Nous avons ainsi attiré plusieurs centaines de millions de dollars de capitaux privés qui n’auraient autrement pas été consacrés à des projets de conservation. De plus, les outils génétiques que nous développons pour la désextinction sont déjà utilisés aujourd’hui pour aider des espèces menacées. »

Pour qu’un retour d’oiseaux proches du dodo soit possible sur l’île Maurice, il faut d’abord qu’y soit réunies les conditions fondamentales pour leur conservation. Il sera nécessaire d’éradiquer les rats, qui s’attaquaient aux dodos, de contrôler les populations de singes et de restaurer la forêt. Ces actions demandent des financements et l’adhésion des populations locales, mais elles bénéficient immédiatement à la faune encore présente. Colossal Biosciences devra respecter son engagement envers une gestion écologique durable.

Mais, au sens strict, le dodo du XVIIe siècle est irrécupérable. Ce que le monde pourrait voir d’ici à 2030 n’est qu’une expérience vivante, illustrant les avancées de l’édition génétique. L’intérêt de cet oiseau ne résidera pas dans la convocation du passé mais dans sa capacité à aider les espèces actuelles à ne pas connaître le destin du dodo.

The Conversation

Timothy Hearn ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. Dodo 2.0 : à quel point sommes-nous proches du retour de cet oiseau disparu ? – https://theconversation.com/dodo-2-0-a-quel-point-sommes-nous-proches-du-retour-de-cet-oiseau-disparu-266611

South Africans who blow the whistle face retaliation and murder: their stories over five decades

Source: The Conversation – Africa (2) – By Ugljesa Radulovic, Senior Postdoctoral Research Fellow, University of Johannesburg

South Africa’s long history of wrongdoing spans from Willem Adriaan van der Stel’s days of running a corrupt trading monopoly to present-day South Africa. Van der Stel was the second Governor of the Cape Dutch Colony, from 1699 to his removal in 1707.

Whistleblowers have been at the core of exposing these instances of corruption.

Public whistleblowing was rare under apartheid (1948-1994). But with the transition to democracy, the reporting of wrongdoing increased. This can largely be attributed to a new constitution that caters for all the country’s citizens, and new laws that reinforced their rights.

One such law is the Protected Disclosures Act No. 26 of 2000, amended by way of the Protected Disclosures Amendment Act No. 5 of 2017. The law was designed to protect individuals who expose perceived wrongdoing to an authority that has the capacity to remedy the wrongdoing.

Yet, it has offered inadequate protection. South African whistleblowers have been overwhelmingly subjected to reprisals – from murder to social, work-related, and legal retaliation.

Our academic expertise is concerned with exploring the experiences of whistleblowers in South Africa, and making meaning of their plight.

In a recently published paper we give an account of the stories of a selection of whistleblowers spanning five decades. We selected a few stories that have set precedents in South Africa.

These cases offer only a glimpse into the experiences of South African whistleblowers. But what is clear is that, by fulfilling their public duty, they place themselves at great personal risk.

Adam Klein

Adam Klein was one of the rare whistleblowers who made a disclosure under apartheid rule. In 1980, Klein, a prosecutor in the Bantu Commissioner’s Court, refused to prosecute five black men under the pass regulations. These were a cornerstone of apartheid legislation, serving as an internal passport system to restrict the movement of non-whites and thus racially segregate the country.

Klein immediately faced retaliation. He was arrested under trumped-up charges, faced threats to his physical well-being and became subjected to surveillance.

He then made a public disclosure to the Sunday Times newspaper, exposing severe abuses at the Pretoria Bantu Commissioner’s Court. The disclosure revealed the inhumane nature of the pass laws, like detention of black people who failed to produce passes.

Klein faced further backlash and had to temporarily relocate to Namibia for his safety. On his return to South Africa, he continued to be subjected to surveillance and interrogation. He passed away in 2011, unacknowledged and without posthumous recognition.

Andries Jacobs

Andries Jacobs, an inspector at the Gauteng Provincial Traffic Department in the town of Benoni, would become known as the whistleblower who exposed police dogs being set on migrants. In January 1998, Jacobs recorded six policemen, who were part of the North East Rand Police dog unit, inciting their dogs to attack Mozambican migrants. Jacobs submitted the bombshell video footage to the Police Commissioner, the Minister for Safety and Security, and the South African Broadcasting Corporation.

The six police officers were eventually arrested in November 2000, nearly a full three years after the incident occurred. On the day of their arrest, the video footage was broadcast on national television. The policemen were charged and received prison sentences of four to five years.

Yet, Jacobs was suspended from work two days after the policemen were arrested. After eventually returning to work, he had to spend a year in the witness protection programme. Jacobs never returned to his original work duties, having not received a duty roster or any equipment to fulfil his role obligations.

Jacobs eventually faced dismissal for the unauthorised use of a video camera to record the “police training exercises”. By 2005, his life had been significantly strained. He received death threats, eventually leading to ongoing stress and a divorce.

Tatolo Setlai

One of the landmark cases of disclosure following the implementation of the Protected Disclosures Act in 2000 is that of Tatolo Setlai. In 2001, the Jali Commission of Inquiry revealed widespread corruption in South Africa’s prisons. Setlai, the head of Grootvlei Prison in Bloemfontein, permitted four prisoners to secretly record prison officials engaging in illegal acts – selling a loaded firearm, drugs, and alcohol; and facilitating the sexual exploitation of a juvenile.

This footage was broadcast on national television. The Department of Correctional Services did not adequately address the disclosure. Rather it subjected Setlai to victimisation and harassment. He faced trumped-up charges and was at the mercy of bogus disciplinary hearings.

Setlai was dismissed but eventually returned to his position after an arduous process with his employer at the Labour Court.

‘Stan’ and ‘John’

Under Jacob Zuma’s presidency (2009-2018), South Africa graduated from “ordinary” corruption. Private firms and individuals exploited corrupt public officials to manipulate key state structures for their personal benefit, and this would come to be understood as state capture.

Much of what was detailed during this time was the result of whistleblowers’ disclosures. Two anonymous whistleblowers, “Stan” and “John”, furnished landmark evidence to support the state capture allegations. They provided Brian Currin, a human rights lawyer, with hard drives containing hundreds of thousands of emails that detailed the nefarious relationship between the Gupta family, the Zuma family, ministers, and heads of state-owned enterprises. The Gupta family – three influential siblings and businessmen originating from India – were fingered as the key drivers behind state capture.

Stan and John’s disclosure became known as the Gupta Leaks. They were used as official evidence at the Zondo Commission of Inquiry into State Capture.

The two Gupta Leaks whistleblowers remain anonymous and have relocated abroad for their physical safety.

Paying with their lives

A number of whistleblowers have lost their lives as a consequence of disclosure.

Jimmy Mohlala, the Speaker of the Mbombela Municipality, was murdered in front of his home after he exposed tender irregularities related to the construction of the Mbombela Stadium for the 2010 FIFA World Cup. His son was injured in the attack.

Moss Phakoe, an African National Congress municipal councillor since 2002, was also shot in front of his home. He and a colleague compiled a dossier that exposed corruption in the Bojanala Platinum District Municipality. Phakoe’s report implicated the former mayor of Bojanala, who was convicted of the murder. The conviction was later overturned as several state witnesses retracted their testimonies.

The murder of Babita Deokaran, Acting Chief Financial Officer of the Gauteng Department of Health at the time of her death, attracted nationwide attention. She had uncovered extensive corruption in the Department and submitted evidence of this to the relevant authorities. She would later investigate corruption related to the procurement of personal protective equipment during the COVID pandemic.

Deokaran was on the brink of making a disclosure pertaining to the COVID-related corruption when assassins shot her after she dropped her child off at school. Six hitmen were arrested for the assassination, but the mastermind remains at large.

Lessons

The frequency and severity of retaliation against South African whistleblowers is alarming.

We conclude from our analysis that the problem resides in a failure of the government to recognise the dire situation South African whistleblowers find themselves in, compounded by lacklustre whistleblower protection legislation.

There has, however, been a signal of intent (and some action) in wanting to reinforce (or rebuild) South Africa’s whistleblower protection legislation.

But this has to be accompanied by political will to adequately implement the new legislation. There also has to be steadfast broader governmental sanctioning against those who do wrong.

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. South Africans who blow the whistle face retaliation and murder: their stories over five decades – https://theconversation.com/south-africans-who-blow-the-whistle-face-retaliation-and-murder-their-stories-over-five-decades-266499

Le plan des botanistes pour enrayer le déclin des palmiers en Afrique

Source: The Conversation – in French – By Fred Stauffer, Curator, Conservatoire et Jardin botaniques de Genève (CJBG)

Les palmiers embellissent les paysages africains, des déserts jusqu’aux forêts tropicales. L’Afrique centrale en possède la plus grande variété, avec 52 espèces, tandis que l’Afrique occidentale en compte 38 et l’Afrique orientale 18. Ils font partie d’une famille mondiale de 2 600 espèces de palmiers.

L’Afrique abrite relativement peu d’espèces de palmiers par rapport à d’autres régions tropicales du monde. Cependant, les palmiers jouent un rôle central dans la vie sociale et économique des populations du continent. Ils sont consommés comme aliments et boissons par les humains et les animaux, utilisés dans les soins de santé et la médecine, et transformés en matériaux de construction. Ils ont également une importance spirituelle et culturelle.




Read more:
Les palmiers malgaches victimes de leur succès local et mondial


Plusieurs études botaniques ont classé la famille des palmiers, avec celle des graminées et celle des légumineuses, parmi les groupes de plantes les plus importants sur le plan économique et culturel dans de nombreuses zones rurales du continent.

Nous sommes un groupe de botanistes du Bénin, de Côte d’Ivoire et de Suisse. Ensemble, nous avons accumulé plusieurs décennies d’expérience sur les palmiers africains. Nos recherches visent à élaborer des stratégies appropriées pour leur conservation et des moyens permettant aux communautés de les utiliser de manière durable.

Lors d’une récente conférence sur la flore africaine au Ghana, nous avons lancé un nouveau réseau panafricain destiné aux spécialistes des palmiers du continent afin d’étudier et de protéger les palmiers. Des chercheurs de Guinée, de Sierra Leone, du Nigeria, du Gabon, du Congo, d’Éthiopie et de Tanzanie ont décidé de s’impliquer dans des projets liés à la biologie, aux utilisations et à la conservation des palmiers.

Nous avons officiellement baptisé ce nouveau réseau Réseau africain des scientifiques spécialistes des palmiers.




Read more:
L’or rouge : l’ascension et la chute de l’empire de l’huile de palme en Afrique de l’Ouest


Notre réseau place les palmiers au centre des projets de conservation. Cela est important car les palmiers africains disparaissent en raison de la déforestation, de la surexploitation et de la perte d’habitat induite par l’homme. Certains, comme Hyphaene guineensis ou Sclerosperma profizianum, sont rares. Leur extinction nuirait non seulement aux écosystèmes, mais aussi aux populations qui en dépendent.

Le Réseau africain des scientifiques spécialistes des palmiers vise également à mettre en commun les compétences, à documenter les connaissances traditionnelles sur les palmiers et à former la prochaine génération d’experts en palmiers.

Le cycle de vie lent d’un arbre menacé

Si seules quelques espèces de palmiers en Afrique sont actuellement menacées d’extinction, la plupart sont aujourd’hui en déclin sur le continent. Le Ghana abrite le Sclerosperma profizianum, tandis que la Sierra Leone et le Liberia abritent plusieurs espèces d’Eremospatha particulièrement menacées.

Le palmier à huile (Elaeis guineensis), le palmier dattier (Phoenix dactylifera) et le cocotier (Cocos nucifera) sont cultivés, mais les autres espèces récoltées sont pour la plupart sauvages.

Même dans des conditions normales, la régénération naturelle des palmiers est lente. Les graines peuvent mettre des mois, voire des années, à germer, et les jeunes plants poussent également très lentement. Ils ont besoin de conditions très spécifiques pour se développer, telles qu’une température élevée et une humidité importante. Certaines espèces, comme les palmiers rotin, ont besoin de plusieurs décennies avant d’atteindre la taille nécessaire pour être exploitées.

C’est pourquoi l’un des principaux objectifs de notre recherche est de comprendre combien de temps il faut à chaque espèce pour germer et devenir exploitable de manière durable.

Les pièces manquantes du puzzle des palmiers

Elaeis guineensis (palmier à huile africain), Cocos nucifera (cocotier) et Phoenix dactylifera (palmier dattier) ont été largement étudiés car ils sont très utilisés dans l’alimentation et les cosmétiques.

Cependant, d’autres espèces de palmiers africains telles que le Borassus aethiopum (palmier éventail africain), le Raphia hookeri (palmier raphia), le Hyphaene compressa (palmier doum) ou le groupe des palmiers rotin (Laccosperma, Eremospatha, Calamus) restent peu documentés. Et ce, malgré leur utilisation pour l’amidon, les fibres, l’extraction de vin et les matériaux de construction, ainsi que dans les cultures locales. Les fruits du Borassus aethiopum, par exemple, sont comestibles et ce palmier est exploité pour son vin, mais des techniques d’exploitation non durables pourraient le mettre en danger.

Dans l’ensemble, les scientifiques ne comprennent toujours pas pleinement la diversité des palmiers africains, leur répartition dans différents paysages ou leur capacité à s’adapter aux changements environnementaux. Autrement dit, nous ne sommes pas encore en mesure de déterminer la meilleure façon de les gérer de manière durable.

Avec le changement climatique, certaines espèces pourraient, par ailleurs, ne pas s’adapter. Des températures extrêmement élevées réduiront la disponibilité en eau et augmenteront la teneur en sel du sol au-delà de ce que les palmiers peuvent tolérer.

Les prochaines étapes ?

Tout d’abord, le Réseau africain des scientifiques spécialistes des palmiers évaluera les menaces qui pèsent sur certaines espèces de palmiers. Nous proposerons ensuite des mesures adaptées aux réalités locales afin de promouvoir la conservation des palmiers.

Deuxièmement, il est essentiel de classer toutes les espèces et de répertorier les endroits où ils se trouvent. Nous estimons qu’au moins 15 % des palmiers africains indigènes ne sont pas encore bien documentés : on n’a jamais observé leurs fleurs ni leurs fruits, qui pourraient pourtant être utiles à l’homme ou aux animaux.

Les botanistes africains doivent également mener davantage de recherches sur la reproduction des palmiers africains, les conditions nécessaires à la germination de leurs graines et leur diversité génétique, afin de connaître les meilleurs moyens de préserver ces arbres.

Troisièmement, des recherches supplémentaires sont nécessaires pour déterminer comment les palmiers pourraient contribuer à la sécurité alimentaire, à l’adaptation au climat et à la conservation de la biodiversité. Ils sont importants non seulement pour les humains, mais aussi pour de nombreux herbivores (mammifères, oiseaux) qui dépendent fortement des feuilles et des fruits de palmier pour leur alimentation quotidienne.

Quatrièmement, un plan de domestication est nécessaire. La domestication consiste à planter et à favoriser la croissance des palmiers de manière contrôlée afin d’en tirer des avantages économiques. Cela peut se faire sur des parcelles agricoles. Cependant, nous proposons également que cela se fasse dans des conditions semi-contrôlées en forêt. Cela pourrait réduire la pression exercée sur les palmiers sauvages, améliorer les moyens de subsistance des populations rurales et intégrer ces arbres dans l’agroforesterie (culture d’arbres avec des cultures).

Bien que le nouveau Réseau africain des scientifiques spécialistes des palmiers se concentre uniquement sur la diversité des palmiers africains, les stratégies de conservation que nous développons seront utiles pour la conservation d’autres plantes. La perte de biodiversité bouleverse l’équilibre fragile des écosystèmes dans le monde entier. Protéger les palmiers d’Afrique, c’est aussi préserver la vie des hommes et des animaux qui en dépendent.

The Conversation

Fred Stauffer bénéficie d’un financement du Conservatoire et Jardin botanique de Genève pour ses activités de recherche et ses missions sur le terrain. Il est affilié à cette institution, ainsi qu’à l’Université de Genève, où il est chargé de cours en botanique.

Doudjo Noufou Ouattara bénéficie d’un financement de la Fondation Audemars Piguet pour les arbres. Il est affilié à l’Université Nangui ABROGOUA et au Centre Suisse de Recherches Scientifiques en Côte d’Ivoire.

Kifouli Adéoti bénéficie d’un financement de la Fondation Audemars Piguet pour les arbres. Il est affilié à l’Université d’Abomey-Calavi en République du Bénin.

ref. Le plan des botanistes pour enrayer le déclin des palmiers en Afrique – https://theconversation.com/le-plan-des-botanistes-pour-enrayer-le-declin-des-palmiers-en-afrique-266597