What Detroit can learn from participatory budgeting processes in NYC, Boston and Brazil

Source: The Conversation – USA – By Celina Su, Professor of Political Science, CUNY Graduate Center

Mary Sheffield, center, had already been through 12 budget processes as a City Council member before she was elected mayor of Detroit. City of Detroit/Flickr

Detroit Mayor Mary Sheffield delivered her first State of the City address on March 31, 2026, at Mumford High School on the city’s northwest side.

In the speech, Sheffield touted the accomplishments of her administration’s first 90 days, which included bringing the cash assistance program RxKids to Detroit. Sheffield also announced a new initiative called Ride to Rise, which offers free bus service to the city’s K-12 students year-round.

Sheffield stressed mandates to tackle poverty, support youth development and seniors, build more single-family homes, increase homeownership and make the city a welcoming place for small businesses to grow and thrive.

That commitment to improving the lives of Detroiters, according to Sheffield, is reflected in the $US3 billion budget she introduced on March 9, 2026.

“This budget is a statement of our priorities and our values,” Sheffield said during the address.

Giving residents a say

One thing that’s missing from her budget proposal is any mention of participatory budgeting – something that Sheffield often championed during her 12 years serving on the City Council.

On the campaign trail, Sheffied said that participatory budgeting allows “residents to feel empowered and have a direct say in how their tax dollars are spent.”

I’m a professor of political science and author of a recent book called “Budget Justice” about grassroots politics. I think Sheffield had it right on the campaign trail – communities around the country want to democratize the budget process so that local governments better address their needs and increase transparency and accountability.

I gained this perspective by serving on New York City Mayor Zohran Mamdani’s transition team on community organizing, mass governance and participatory budgeting.

Participatory budgeting is a democratic experiment that gives constituents, rather than elected officials, power to decide how to allocate a portion of public funds. Although Detroit often holds community engagement forums and open calls for grant funding, participatory budgeting differs because it puts the power of the purse into the people’s hands.

Cities need democracy between elections

I first encountered participatory budgeting in 2011. Leaders from the grassroots organization Community Voices Heard and others helped to bring it to New York City during the Occupy Wall Street protests. Protesters who were part of that movement questioned why banks received governmental bailouts while households struggling with predatory student debt did not. I joined the rulemaking steering committee for New York’s new participatory budgeting process and stayed involved for the next decade.

New York’s process consists of four stages each year. In the fall, residents learn about the process through public service announcements, local media, door-knocking outreach or word of mouth. They then attend neighborhood assemblies where they pitch thousands of proposals for community projects. Frequently, a simple question gets them started: “How would you spend $1 million of the city’s budget?”

Meeting face to face matters. I’ve observed dozens of these assemblies, and people are much less likely to troll others in person than they are online, when they are anonymous and fueled by keyboard courage.

Over each winter, some residents volunteer to research and curate the proposals that will end up on the ballot. They also work with city agencies to develop ideas into full-fledged proposals. In New York, these projects have ranged from curb extensions at intersections identified as dangerous by local residents to summer arts camps and conflict resolution training programs.

Each spring, residents vote for the proposals that they want implemented.

Each summer, winning projects get funded.

In New York City, voting week for 2026 participatory budgeting proposals is April 11-19.

Engagement beyond voting

In the fiscal year 2026 budget cycle, New Yorkers allocated $30 million in public funds as part of the city’s $116 billion budget.

The nonprofit Community Development Project reported that 68% of the 17,000 people who voted on participatory budget proposals at the time of the survey had never worked together on a community issue before. Roughly 1 in 4 stated that they were not eligible to vote in regular elections, primarily because of being under age 18 or holding an undocumented immigration status.

For many, participatory budgeting helped them to understand their communities in new ways. As one participant put it, “I was able to see the needs (of) the community in a way I’ve never seen before. … I didn’t know how bad of an asthma cluster there was in public housing. I don’t have kids, so I don’t know about needs at school. I don’t have any relatives who live in senior housing, so I didn’t know about the issues they faced.”

Participatory budgeting also produced ripple effects. Participants were 8.4% more likely to vote than those who had not participated in the process. The effects are even greater for those who have lower probabilities of voting, such as low-income and Black voters.

In Detroit, only 22% of voters took part in the most recent municipal election. Participatory budgeting could be a tool for increasing turnout.

A Black woman with a great red manicure holds a sticker that reads 'I am democracy in the D. I voted today.'
Voting makes you feel good, but only 1 in 5 voters in Detroit came out for the most recent municipal election.
City of Detroit/Flickr

No shortcuts for meaningful participation

In my experience, participants need to feel they are doing meaningful work.

Research shows that participatory budgeting works best when communities allocate significant pots of money through the process, when residents are trained and encouraged to stay engaged beyond the process, and when combined with efforts to change practices in other parts of government, too.

In Boston, the Better Budget Alliance works to make sure projects that didn’t get funded through the city’s participatory budgeting process still get included in community demands for the larger city operating budget, and vice versa.

In New York, the Mamdani administration has just announced a new Office of Mass Engagement that aims to deepen the levels of transparency, listening and follow-through in the city.

In other words, experiments such as participatory budgeting can serve as an entry point to transformational change.

That change may look like the ambitious and growing national people’s budgets movement, which brings together local residents and community groups to protest budget cuts on essential services, articulate budget priorities and democratize the budget process. Unlike participatory budgeting, the movement’s campaigns often ask questions regarding divestments – for example, from jail expansions – as well as investments. It also concerns itself with taxes and the revenue side of the budget, and how budgetary powers should be shared by the mayor, city council, agencies and residents.

A beginning in Brazil

In Brazil, where participatory budgeting first began, the process was seen as an investment in working-class residents. Brazilian cities that implemented the process collected 16% more in taxes than cities that did not implement the process. Cities with participatory budgeting were seen as more legitimate, making their residents more willing to support additional taxes. These cities also boasted of higher tax collection and compliance rates.

Participatory budgeting also helped residents to harness the popular pressure and political will to reject development projects – such as luxury hotels – that they felt reflected business interests more than public needs. Because citizens expressed interest in providing funds for prenatal health, prominent political scientists even credit participatory budgeting with lowering infant mortality.

In American cities such as New York and Detroit, participatory budgeting processes could in time take on more challenging issues, such as universal day care or social housing.

Opaque budgets and an austerity mindset lead to distrust in government, perpetuating anti-tax sentiments.

This undermines the capacity of government to get things done. Robust participatory budgeting can help residents press for what they value most and serve as a tool to help cities such as Detroit thrive.

The Conversation

Celina Su served on New York Mayor Zohran Mamdani’s administration transition team’s subcommittee on community organizing. She also served on the New York city-wide steering committee for participatory budgeting and advised the process for its first decade, from 2011 to 2021.

ref. What Detroit can learn from participatory budgeting processes in NYC, Boston and Brazil – https://theconversation.com/what-detroit-can-learn-from-participatory-budgeting-processes-in-nyc-boston-and-brazil-278764

You’re not going to be alone in national parks this summer – enjoy the company

Source: The Conversation – USA (2) – By Will Rice, Associate Professor of Outdoor Recreation and Wildland Management, University of Montana

Are there too many people here? It depends on your perspective. Michael Quinn/National Park Service

On a summer morning a couple of years ago, we went for a hike on the fabled Bright Angel Trail, one of the most popular trails in Grand Canyon National Park.

As scholars of tourism and outdoor recreation, our conversation inevitably turned to the visitor experience at the Grand Canyon and a question that has plagued the parks since their inception: Are the national parks overcrowded?

It’s not a simple question, but we believe that people have been answering it incorrectly for over a century, as many Americans have come to a decisive conclusion: Yes. Of course, some specific locations within parks can get overcrowded, and some people are more sensitive to crowding. But often people wrongly assume that a busy park means a crowded one, or that having other people around is inherently bad.

A large group of people stand in a row watching a large spout of water with a wooded hillside in the background.
Old Faithful in Yellowstone National Park is a major attraction that many visitors to the park want to witness.
Neal Herbert/National Park Service

As far back as 1935, one of the founders of the American wilderness movement, Aldo Leopold, described the national parks as “over-crowded hospitals trying to cope with an epidemic of esthetic rickets.” Presidents and Congress have discussed the issue, as have most major newspapers in the nation at one time or another. Magazine headlines and research articles have decried “overcrowding” and the “parks being loved to death.” Our own research fields have fueled this obsession with crowding.

However, our analysis, as well as work by others, has found that being in public parks and natural environments with other visitors is a powerful opportunity to enhance experiences in these places rather than detract from them. We note that the assumption that nature is best experienced in solitude or only within one’s own group reflects a generally western and elitist perspective and does not align with how people often actually experience parks or the quality of their experiences in the presence of others.

A group of people sit and stand on a mountaintop watching the sun rise over the ocean, a lake and some lower hills.
Watching the sunrise on Cadillac Mountain in Acadia National Park in Maine can be an enjoyable collective experience.
Kent Miller/National Park Service

Beyond crowding, toward ‘communitas’

Hiking on the Bright Angel Trail that morning in 2023, we noticed vignettes that challenge the crowding assumption. The trail was busy. It was early, and the south wall of the canyon was still blanketed in shade. Two families, one hiking up, the other hiking down, were chatting and sharing insights at a bend in the trail.

A young hiker shared her binoculars with an elderly man, focusing them on a distant, rare desert bighorn sheep. An older couple smiled as a gaggle of kids ran uphill and past them, racing to the ice cream promised to them on the canyon rim. Another hiker pointed out a California condor sailing above. Together, we marveled at its beauty.

Despite the number of people on the trail, we did not feel crowded. Rather, we felt a spontaneous sense of community and togetherness. Anthropologist Victor Turner called this feeling “communitas,” a shared experience that a person might encounter during a pilgrimage, surrounded by other travelers with a shared journey and goal.

Others have written, too, about the value of experiencing national parks in the presence of others, finding a shared sense of awe and affirmation of values. Visitor surveys conducted in the Cleveland National Forest near San Diego in summer 2025 show that the more people experience communitas, the less likely they are to feel crowded.

In fact, in 1922, more than a decade before Leopold’s lament about “over-crowded hospitals,” conservation advocate Robert Sterling Yard described the sharing of space and time as crucial elements of the national park experience. He noted that a person “sits around the evening camp fire with a California grape grower, a locomotive engineer from Massachusetts, and a banker from Michigan.” He continued: “Here the social differences so insisted upon at home just don’t exist. Perhaps for the first time, one realizes the common America – and loves it.”

It’s a matter of perspective

A view of several people in a small area below tall rock walls.
Are these crowds or prospective companions at Bryce Canyon National Park in Utah?
Bing Pan, CC BY-NC-ND

It is important to remember that each person has the power to shift how they react to the number of people around them in parks. Being crowded is not an objective state; it is a negative perception of social conditions. For instance, when people see visitors as different from themselves, they are more likely to feel crowded. But by recognizing that tendency and reframing the interaction, people are more likely to find communitas.

Communitas, too, is in the eye of the beholder. When people view social interactions in parks as opportunities to share in a larger collective experience, they open up the possibility of experiencing communitas.

This summer, we urge you to enter America’s national parks with perhaps a different perspective. Experience the collective awe of watching Old Faithful erupt with a few hundred of your fellow pilgrims in Yellowstone National Park. Find wonderment in sharing a sunrise from Cadillac Mountain in Acadia National Park or sunset from Olmstead Point in Yosemite National Park. Seek the power that comes from seeing the Grand Canyon for the first time, together.

Most importantly, be the person who points out that condor, gives a neighboring camper that extra hot dog, or takes that photo for another family. Find your communitas, help others to do the same and, together, consider the grandeur of the shared experience of America’s national parks.

The Conversation

Will Rice receives funding from the National Park Service and USDA Forest Service.

Bing Pan receives funding from National Park Service, Department of Interior, USA.

ref. You’re not going to be alone in national parks this summer – enjoy the company – https://theconversation.com/youre-not-going-to-be-alone-in-national-parks-this-summer-enjoy-the-company-278749

Winter’s alarmingly low snowpack offers a glimpse of the changing rhythm of water in the western US

Source: The Conversation – USA (2) – By Imtiaz Rangwala, Senior Research Scientist in Climate, Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder

In a good year, the West’s mountain snowpack feeds streams and rivers well into summer. George Rose/Contributor/Getty Images News

Winter is more than just a season in the western U.S. – it is a savings account to get farms and homes through the long, dry summer ahead. As the snowpack that accumulates in the mountains through winter slowly melts in late spring and summer, it feeds into rivers and reservoirs that keep communities and ecosystems functioning.

The April 1 snowpack measurement has long been the single most important number in western water management, considered a strong proxy for how much water the mountains are holding in reserve.

But in 2026, that savings account has been woefully deficient.

Across the western United States, temperatures from November through February were among the warmest on record, with many areas 5 to 10 degrees Fahrenheit (2.8 to 5.5 degrees Celsius) above the 20th-century average. March continued to break heat records. At lower elevations, the higher temperatures meant a significant part of the winter’s precipitation fell as rain rather than snow. In some places, snowfall accumulated but melted quickly during warm periods.

A chart shows an unusually low amount of area in the West with snow cover during winter 2026.
The total area of the western U.S. with snow cover was exceptionally low compared with the rest of the 21st century.
National Snow and Ice Data Center

As a result, even regions that received near- or above-normal precipitation for the season failed to build substantial snowpack. In the northern Rockies and the mountains of the Pacific Northwest, any above-average snow accumulation was largely confined to the highest elevations, while middle and lower elevations had relatively little snowpack.

This situation is a hallmark of warming winters. As global temperatures rise, the freezing line where precipitation changes from rain to snow moves up the mountains, shrinking the area capable of sustaining a seasonal snowpack.

A map shows most of the stations across the western mountains were below 50% of average. The best conditions were in the northern Rockies and Pacific Northwest, and most of those were still below average.
At the vast majority of the U.S. Natural Resources Conservation Service’s snow measurement stations across the West, the snowpack’s snow-water equivalent on March 30, 2026, was less than 50% of the 1991-2020 median.
Natural Resources Conservation Service
A map shows wide temperature anomalies in the western U.S. compared with the 20th-century average.
Temperatures were well above the 20th-century average across the western U.S. in winter 2025-26.
National Centers for Environmental Information

The exceptionally warm winter of 2025–26 across much of the western U.S. delivered a powerful preview of what the regional water cycle in a warmer climate may increasingly look like: less snow and a fundamental reshaping of the hydrograph – the chart of how much water flows through streams across the year.

A flattening hydrologic pulse

The consequences of this shift for water supplies are already visible in streamflows.

In multiple river basins in the West, streamflows were above average in winter and early spring, and some locations were approaching record-high levels. Historically, that water would have remained frozen in the snowpack until late spring. Instead, precipitation arriving as rain – along with intermittent midwinter melting events – increased the runoff.

Scientists who study natural water flows, as I do, pay attention to the hydrographs of streamflows in river basins to see when the water flow in mountain streams is strongest and how long that flow is likely to continue into summer.

A chart shows a typical arc of increasing water flows as snow melt in 2025, compared with several peaks of snowmelt and rainfall during 2026.
This hydrograph showing two years of water flows in the St. Mary River near Babb, Mont., reflects the difference between a typical late-spring peak, as 2025 saw, and several midwinter peaks from warm temperatures and rain, as 2026 is seeing.
U.S. Geological Survey

In recent years, rising temperatures have led to a redistribution of streamflows throughout the winter and early spring in ways that are fundamentally reshaping the hydrographs of snowmelt-dominated rivers. Rather than a single dominant peak during late spring or early summer, smaller peaks emerge in winter and early spring. At the same time, the traditional snowmelt pulse, relied on to fill reservoirs in late spring, weakens.

In effect, the hydrograph is flattening. The winter of 2025–26 illustrates this phenomenon: Higher early-season streamflows suggest the West will see less runoff later in the year when communities, farms and wildlife need it.

The Colorado River: A system on the edge

Nowhere does the convergence of record warmth, depleted snowpack and altered hydrology carry higher stakes than in the Colorado River Basin. More than 40 million people in seven states plus Mexico and 5.5 million acres of farmland depend on the river’s water, but the river’s flow is no longer meeting demand.

The April-through-July 2026 runoff into Lake Powell – the reservoir behind Glen Canyon Dam and the primary index of the Upper Colorado River Basin’s annual water budget – is currently forecast to rank among the lowest in recent decades. It has been tracking close to the grim years of 2002 and 2021, considered benchmarks of western drought.

Unless spring brings substantial late-season snowfall to the high mountains, 2026 could join those years as a marker of how thin the margin between water supply and demand has become in a river system already under sustained stress from two decades of drought and water overuse.

The low reservoir levels in the basin in 2026 and the low snowpack are adding fears of water shortages just as the seven states that rely on the Colorado River are struggling to reach a new water use agreement.

The changing rhythm of water in the West

The winter of 2025–26 highlights two emerging realities.

First, temperature is increasingly dominating precipitation in determining western water supplies. Even above-normal precipitation cannot compensate for persistent warmth when it falls as rain rather than snow and accelerates snowmelt in the mountains.

Second, the nature of the West’s streamflows is shifting in ways that complicate water management.

Rain-on-snow events can produce flooding in winter, as the Seattle area saw in late December 2025. A low snowpack also means less runoff in summer, which can exacerbate water shortages and raise the wildfire risk as landscapes dry out. Even if a year has normal precipitation, if it falls as rain or there is earlier snowmelt, then evaporation through summer, in a warmer climate, will leave less water in the system.

Snowpack declines, earlier runoff, elevated winter flows and flattened hydrographs are all consistent with long-standing projections for the western United States as global temperatures rise.

What makes the winter of 2025-26 notable is how clearly these signals appeared, even in a year without widespread precipitation deficits.

This shift highlights the need for adaptive reservoir operations – the ability to adjust water storage and release decisions in real time to capture earlier runoff and preserve water for longer dry seasons, while still maintaining space in reservoirs for flood control during wetter winters. For communities across the West, it also reinforces the growing reality that the familiar seasonal rhythm of mountain water is changing.

The Conversation

Imtiaz Rangwala receives funding from USGS, NOAA, NSF and USDA. He is affiliated with Boundless In Motion.

ref. Winter’s alarmingly low snowpack offers a glimpse of the changing rhythm of water in the western US – https://theconversation.com/winters-alarmingly-low-snowpack-offers-a-glimpse-of-the-changing-rhythm-of-water-in-the-western-us-279664

Why Michael Jackson’s daughter, Paris, won’t stop ‘til she gets enough from his estate

Source: The Conversation – USA (2) – By Reid Kress Weisbord, Distinguished Professor of Law and Judge Norma Shapiro Scholar, Rutgers University – Newark

Paris Jackson, seen here in March 2026, has sued the executors of Michael Jackson’s estate several times. Stephane Cardinale /Corbis via Getty Images

When Michael Jackson died in 2009, left everything he owned to a family trust – an estate planning technique for giving away property that allows for privacy. The trust benefits Jackson’s three children and his mother, but nearly two decades later, Jackson’s estate, now worth an estimated US$2 billion, still hasn’t been fully distributed to the trust.

The most recent of many legal skirmishes to come to the public’s attention involves Paris Jackson, Michael Jackson’s daughter. She is asking a court to take a closer look at how the pop icon’s estate is being handled by its executors – the people responsible for managing it.

Paris Jackson has accused executors John Branca and John McClain of paying themselves and the estate’s lawyers too much, and for leaving $464 million owned by the estate uninvested. If that’s true, it would mean there is less money than there should be left over for her and her father’s other heirs. Branca is an entertainment lawyer, and McClain is a music executive.

Both were selected by Michael Jackson and named as executors in his will. They have repeatedly disputed Paris Jackson’s allegations and asserted that Paris has received at least $65 million in payouts from the estate.

Paris Jackson also has accused Branca of misusing his position as producer of “Michael,” an upcoming Michael Jackson biopic reportedly financed by Jackson’s estate, to cast an A-list celebrity – Miles Teller – to play the role of Branca himself in the film. According to Paris, the casting choice was costly and unlikely to increase box office revenue.

Paris Jackson has also stated that the $150 million film is a “botched production.” The executors have responded by arguing that the application of their expertise to other productions about the singer has already provided a huge payoff to the estate. The executors also recently won a court battle against Paris Jackson that ended with a judge ordering her to pay their attorney’s fees in a related dispute.

As law professors who study the transfer of property after death, we find that when disputes over inherited wealth become national news, they are often difficult to understand because this type of legal process is obscure and most people never interact directly with the probate court system.

This case illustrates what happens to property after death, even if the dispute is unusual due to the unique assets involved.

Michael Jackson and another man pose with five children.
Michael Jackson poses with his friend, real estate developer Mohamed Hadid, Hadid’s children and Jackson’s children – Michael Joseph Jr., left, Paris, center, and Prince Michael II, second from right, in 2008 .
Mohamed Hadid via Getty Images

What happens to property after death

When someone dies, whether or not they’re a celebrity, any property they owned usually goes through a legal process called probate.

Probate is a court process that’s designed to notify everyone who may have an interest in the estate and to make sure that all property the dead person owned is handled properly. The court oversees the collection of assets, the payment of debts and taxes, and the distribution of any remaining assets to heirs.

This process can be completed in roughly one year for typical estates that do not contain unusual assets or erupt into litigation. But when the estate is large, complicated or disputed, probate can last for years or decades.

One of us, Reid Weisbord, co-authored a study of probate cases in San Francisco and found that the average estate remains open for a year and a half, and hotly contested and complex cases tended to linger in the system for two years or longer.

In one of the most extreme examples, resolving probate disputes over the estate of actress and model Marilyn Monroe took more than 40 years after her 1962 death.

Who manages the estate

When people draft their wills, they typically name one or more executors.

Most people who do that choose a child, grandchild, spouse or sibling to serve in that role. On occasion, people choose a lawyer or other professional to serve as executor. That’s what happened in Jackson’s case.

Being an executor for the man who revolutionized pop music after a successful run as a child star is even more complex than it would be for most huge estates because it includes music rights, business interests and licensing agreements that continue to earn money.

Like other executors in this situation, the men handling Jackson’s estate have hired lawyers, accountants and other professionals to assist them. The cost of paying for those professional services comes out of the estate. In this case, Paris Jackson is complaining that the compensation paid to executors of her father’s estate has been excessive. According to her legal complaint, they were paid more than $148 million through the end of 2021, a number that “dwarfs any amount distributed to Paris or her siblings.”

Common causes of probate disputes

To be sure, the Jackson case is an extreme example of probate battles. But about 1 in 9 estates are legally disputed for a wide range of reasons that include:

  • Challenges to the validity of a will, often based on claims like undue influence or diminished mental capacity.

  • Fights over who should serve as executor.

  • Disputes about how much executors and lawyers should be paid.

  • Disagreements about how to interpret unclear language in a will.

A role with fiduciary duty

Executors have many important responsibilities. They must find and protect the dead person’s property, pay their estate’s debts, file tax returns, manage investments and eventually distribute property to the estate’s heirs.

The law says executors must act in the best interests of the estate and its beneficiaries. This is called a fiduciary duty, meaning they must act carefully and honestly.

In real life, it’s hard for executors to be completely neutral.

If the estate hires executors who do not stand to inherit anything from it, they usually expect to be paid for their work. Managing an estate, especially a large one, can take years and require specialized skills.

If the executor is also a beneficiary, meaning they are named in the will or an associated trust, the situation can be even more complicated because they have a personal financial stake in the outcome. Even if they act in good faith, heirs and other people named in the will may question their decisions.

This kind of conflict of interest is often unavoidable, but it is one reason why disputes over fees and decision-making are so common.

Banners for 'MJ The Musical' are seen hanging outside the Neil Simon Theatre in New York's Broadway district.
Revenue from Michael Jackson’s intellectual property, including the world-touring ‘MJ The Musical’ and a new biopic, is still flowing into his estate.
Dia Dipasupil/Getty Images

What makes this fight different

Disputes over executor pay are not unusual. But this case stands out because of the type of spending being challenged.

Jackson’s estate is not just collecting his assets and then distributing them. It is actively managing a complex portfolio of intellectual property rights that includes movies, music deals, publicity rights and other business ventures.

That raises a question that can be hard to answer: Are some expenditures from the estate benefiting those managing the estate rather than those who inherit from it?

Paying top lawyers or investing in a film could increase the estate’s value. But Jackson’s relatives may see those same decisions as unnecessary or excessive.

Paris Jackson’s latest legal challenge reflects this tension. Executors get broad power to run an estate, especially one that operates like a business. But they must still justify their decisions to the people who will inherit the estate’s assets once it has settled. That’s why the choice of executor is so important.

As this dispute moves forward, the court will continue to supervise the process, which is helpful when the parties cannot agree on how to settle an estate. In the end, the case highlights a basic truth about probate: Even after death, managing wealth can be complicated, slow and deeply contested.

The Conversation

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

ref. Why Michael Jackson’s daughter, Paris, won’t stop ‘til she gets enough from his estate – https://theconversation.com/why-michael-jacksons-daughter-paris-wont-stop-til-she-gets-enough-from-his-estate-279510

The NFL draft brings economic gains – and hidden public safety costs

Source: The Conversation – USA (2) – By Adam Annaccone, Clinical Associate Professor, Department of Kinesiology, University of Texas at Arlington

The NFL draft is a mass gathering that must be planned as a public safety and emergency response operation. Icon Sportswire via Getty Images

When the NFL draft comes to town, the host city’s hotels, bars and restaurants fill, while its downtown gets three days of national exposure.

Detroit’s 2024 draft drew more than 775,000 fans and generated a reported US$214 million in economic impact, including $161 million in visitor spending, according to The Associated Press. Visitor spending is the money directly spent by visitors coming into the city for the event, whereas the economic impact includes the ripple effect of money circulating before, during and after the event – like restaurants buying more food from suppliers, hotels hiring extra staff, and vendors purchasing additional inventory.

Pittsburgh is set to host the 2026 NFL draft April 23-25. According to Steelers executive Dan Rooney III, the event could bring to the city 500,000 visitors and an economic impact of $200 million.

A football stadium filled with hundreds of thousands of people during the day.
The arrival of the NFL draft requires coordinated planning across public safety, transportation and health systems to manage massive crowds safely.
Icon Sportswire via Getty Images

Economic impact almost always leads the news when a city lands the NFL draft. The first numbers that people tend to hear come from team officials, city leaders and local boosters who project visitors, spending and exposure.

My academic work examines emergency planning and safety in different sporting environments. The question I often ask is not how much money an event like the NFL draft brings in, but what it takes to deliver it safely?

Preparing for an event of this scale requires careful planning and real public costs.

A mass gathering with intense preparation

The NFL draft is not just a fan event. Like a marathon, a championship parade or a major outdoor concert, it is a mass gathering that must be planned as a public safety and emergency response operation.

Research shows that such large-scale events can increase demand for emergency services, strain local systems and require careful coordination across agencies far in advance.

Ahead of the 2026 draft, Pennsylvania officials have described months of preparation involving emergency management, law enforcement and transportation agencies. That means walk-throughs of event spaces, traffic planning, risk assessments, scenario-based drills and testing how agencies would communicate during a disruption or emergency. One public example came in January when Pennsylvania State Police landed a helicopter at Point State Park for training.

In my experience, large crowds in dense public spaces require more than a security presence. They require systems that can handle routine medical issues such as dehydration, falls or minor injuries, while preserving enough ambulance, emergency department and first-responder capacity to respond if a serious emergency occurs. They also require agencies to coordinate quickly when conditions change. Most of that work unfolds before the cameras arrive.

What sports medicine reveals about event preparedness

Protocols used in sports medicine can offer a clear example of what reliable preparedness looks like.

Emergency action planning in athletic training revolves around everyone knowing their jobs, knowing how to communicate and how to find equipment and transport patients. The aim is a response that is coordinated, rehearsed and dependable under pressure.

It is this system that allows the roughly 30 medical personnel on an NFL sideline to function as one unit rather than as individual responders. Scale that logic up to a city like Pittsburgh, filled with hundreds of thousands of people, and the same questions emerge: Where will care for fans be delivered? What can be treated on-site, and what requires ambulance transport? How will patients reach a local hospital when roads are closed or crowds disrupt access? And if weather, security concerns or a serious medical incident interrupts normal city flow, who communicates what, and to whom?

Detroit’s draft showed how large and complicated that operating system can become. The event covered roughly 2 million square feet (186,000 square meters), or about 46 acres – roughly the size of 35 football fields.

At that size, the draft is better understood as a temporary urban system layered onto an existing city than as a traditional fan festival. Crowds have to be directed, access points controlled, medical teams positioned and emergency routes protected. The challenge, then, is not merely attracting visitors. It becomes designing a citywide plan capable of absorbing them without overloading the systems responsible for keeping them safe.

A group of people wearing black-and-gold football jerseys and apparel.
Hosting the NFL draft will require Pittsburgh to implement coordinated crowd control strategies.
Icon Sportswire via Getty Images

For example, road closures and congestion are often treated as inconveniences or side effects of a major event, but they are also part of the emergency response environment. Gatherings of hundreds of thousands of people disrupt normal traffic, which can complicate emergency medical services operations. Transportation planning is therefore less about convenience than about clinical risk management because time to care depends in part on whether access routes remain usable when they are needed most.

A staffing plan can be excellent on paper, but if emergency vehicles cannot move efficiently, response times slow down. Traffic design can affect care delivery just as much as placement of medical teams and first responders does.

Hidden costs behind the headlines

Once the draft is understood as a public safety operation, the question of how much it costs looks different, too.

Pittsburgh City Council approved $1 million in funding for the 2026 NFL draft. State and local agencies have also been planning security, transportation and emergency response operations well in advance.

Ahead of the 2025 draft in Green Bay, Wisconsin state lawmakers sought $1.25 million to reimburse local law enforcement and fire departments in the Green Bay area for part of their event-related costs. After the draft had ended, Gov. Tony Evers announced that the state would give an additional $1.8 million to the city of Green Bay, the village of Ashwaubenon and Brown County to cover security and other public safety costs associated with hosting the event.

Those figures do not cancel out the economic upside of hosting the NFL draft, but they do show that significant public resources are used to make that upside possible. Staffing, overtime, EMS staging, traffic control and interagency coordination are integral to the event, not background details.

What makes the full public cost harder to pin down is that not every expense is disclosed or presented in one place. In Pittsburgh, for example, state, county and city officials have collectively earmarked at least $14 million for the official nonprofit tourism agency responsible for planning the draft, VisitPittsburgh. The nonprofit is required to provide a $5 million match.

Large crowd in the middle of a city during the day.
Detroit’s draft drew more than 775,000 fans to the city in 2024.
Aaron J. Thornton via Getty Images Entertainment

Pennsylvania State Police said they, too, are coordinating security planning, traffic tactics, risk assessments and interagency exercises, while declining to provide an estimated cost for that work, citing security reasons. That means the public cost of hosting the draft may be visible only in part.

The headline economic impact figure is designed to measure the event’s upside. It is not a net figure that subtracts the full cost of security, emergency response and other public operations required to make the event possible.

In my view, the deeper story is not simply that the NFL draft brings money into a city; it is that an event of this scale depends on systems that are built, staffed and tested well before the first draft pick is announced. When those systems work, the headlines stay focused on visitors, spending and exposure. If they are strained by a medical emergency, security incident or breakdown in crowd flow, attention shifts immediately to the infrastructure underneath it.

The economic story matters. But without the hidden work that supports it, it cannot exist on its own.

The Conversation

Adam Annaccone 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 NFL draft brings economic gains – and hidden public safety costs – https://theconversation.com/the-nfl-draft-brings-economic-gains-and-hidden-public-safety-costs-277824

How long young cancer patients survive often depends on the insurance they have

Source: The Conversation – USA (3) – By Rhonda Winegar, Assistant Professor of Nursing, University of Texas at Arlington

The financial costs of cancer screening and treatment can make accessing care feel impossible. Thai Noipho/iStock via Getty Images Plus

Cancer is becoming increasingly common among young people, with cases slowly and steadily rising every year for the past decade. And what type of insurance adolescents and young adults have affects at what stage of cancer they’re diagnosed and how long they survive.

As researchers who study cancer disparities in young adults, we examine the social and systemic factors that shape who survives a cancer diagnosis. In our recent review of the scientific literature – an analysis that included nearly 470,000 Americans between the ages of 15 and 39 who had been diagnosed with cancer – we found that insurance status is one of the clearest and most consequential factors.

Young people with private health insurance lived longer than those on Medicaid or without insurance. Depending on the cancer, this survival advantage ranged from a modest 8% lower risk of death for lymphoma to a drastic 2 to 2.5 times lower risk of death for melanoma and multiple other cancer types.

Young people are especially at risk

People between the ages of 15 and 39 have especially unstable access to health coverage in the U.S.

Young people in this age group are often finishing school or starting new jobs, including positions that don’t offer benefits. They’re also aging off a parent’s insurance plan, which happens when you turn 26 under current U.S. law. This instability leaves many young people uninsured or underinsured.

The consequences of no or insufficient health coverage go beyond inconvenience. Adolescents and young adults already tend to see smaller improvements in cancer survival over time compared to children and older adults. This gap has puzzled researchers for years.

Insurance instability appears to make this gap even wider.

Insurance shapes the entire cancer experience

Health insurance does far more than cover hospital bills. It determines whether a patient can access a specialist, how quickly treatment begins and whether they are eligible to enroll in a clinical trial.

Strikingly, patients on Medicaid and uninsured patients often had similar cancer outcomes – and both did worse than those with private insurance. This suggests that simply having some form of coverage isn’t enough if that coverage doesn’t actually open doors to quality care.

Two patients in chairs with IVs attached to their arms, wearing street clothes, headphones over their ears
What kinds of cancer treatment a patient can access, including clinical trials, is ultimately determined by their insurance.
SeventyFour/iStock via Getty Images Plus

One underdiscussed consequence of insurance status is access to clinical trials. These studies are often the pathway to the most advanced treatments available. Yet research has found that the type of insurance a young cancer patient has is a significant predictor of whether they enroll in a clinical trial, with higher enrollment rates for those with private insurance.

For cancers such as early stage Hodgkin lymphoma – a cancer more common in young adults – treatment decisions and access to newer approaches can vary significantly based on where and how a patient receives care, which is often tied to their insurance status.

Clarifying cause and effect

The body of research we analyzed primarily tracked patterns in existing data rather than through controlled experiments. That makes it difficult to say with certainty that insurance status directly causes differences in survival.

However, the pattern we observed was consistent across many studies. Moreover, most studies recorded insurance status only at the time of diagnosis, which misses changes that happen during treatment. Patients may lose or gain coverage in the middle of their care.

Future research that tracks insurance continuously throughout treatment, standardizes how coverage is categorized and examines specific cancer types and age subgroups in greater depth could clarify the picture further.

Patient in gown sitting on the edge of a hospital bed at night, elbows on knees and chin on clasped hands
Financial stress can force patients to choose between essential medical care or basic necessities.
Jacob Wackerhausen/iStock via Getty Images Plus

What can be done to help young cancer patients

The good news is that insurance is something society can change. Based on our research, a few key areas stand out.

Expanding coverage could help keep more young cancer patients insured. This might look like policies allowing young adults to stay on a parent’s plan longer, expanding Medicaid and reducing gaps in coverage after diagnosis.

Improving what Medicaid actually covers could make it easier for patients to access top cancer centers. Many doctors and cancer centers limit how many Medicaid patients they see because reimbursement rates are low.

Connecting with financial counselors, patient navigators and care coordinators could help young patients on public insurance or those who lack insurance navigate the system. This support could enable them to get timely access to the right treatments and clinical trials.

Early screening for financial barriers can prompt timely referrals to financial counseling, assistance programs or social work before patients experience treatment delays. Financial support can help patients complete treatment, make their appointments and improve their outcomes.

The Conversation

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

ref. How long young cancer patients survive often depends on the insurance they have – https://theconversation.com/how-long-young-cancer-patients-survive-often-depends-on-the-insurance-they-have-278515

Iran’s attacks drone on, with the U.S. at risk of losing the war

Source: The Conversation – Canada – By Michael J. Armstrong, Associate Professor, Operations Research, Brock University

The United States and Israel have repeatedly boasted about airstrikes in their current war with Iran. In Week 1, they claimed the destruction of 75 per cent of Iran’s missile launchers. By Week 2, they had reduced Iranian missile fire by 90 per cent and said the war was “already won in many ways.”

And yet, Iran keeps damaging refineries and blocking tankers from crossing the Strait of Hormuz.

The country has certainly suffered many tactical losses. But its missiles and drones have been strategically successful.

Iran so far has launched at least 5,400 such projectiles. Surprisingly, less than a tenth of them have targeted Israel, its traditional rival.

Missiles over Israel

Israel faced about 450 Iranian missile attacks during the war’s first four weeks. The rate of fire fell rapidly after the first weekend but has never halted.

Some missiles carry several hundred kilograms of explosives, enough to destroy an entire building. The rest instead dispense dozens of cluster bombs over wide areas. Those are less powerful but still lethal.

Israel’s long-range Arrow interceptors engage the missiles first. Its mid-range David’s Sling and short-range Iron Dome interceptors provide backup. (The country’s Iron Beam lasers are not being used.) Together, they’ve reportedly intercepted 92 per cent of incoming missiles.

But interceptors sometimes miss. And their supply is limited. Consequently, at least nine large warheads and 150 cluster bombs have hit populated areas.

These numbers imply that almost all Iranian missiles are accurate enough to need interception. By contrast, during Israel’s earlier conflicts with Gaza in 2008, 2011 and 2014, less than a third of incoming rockets were so accurate.

Meanwhile, more than 90 per cent of Iran’s missiles and drones have targeted Arab countries in the Persian Gulf.

This line chart shows the combined number of Iranian missiles and drones arriving each day over the United Arab Emirates and over Israel during the past four weeks.
Number of Iranian missiles and drones arriving daily over Israel and the UAE, February 28 to March 27.
Published news reports, CC BY

Drones across the Persian Gulf

Saudi Arabia, Jordan, Iraq, Kuwait, Bahrain, Qatar, Oman and the United Arab Emirates (UAE) collectively reported around 4,900 Iranian attacks during the first four weeks. Only one fifth were missiles: the rest were drones.

These countries have stated they are neutral in the war. However, they do have defence agreements with the U.S., and some host American military facilities.

These countries defend themselves using weapons like the U.S.-made Patriot and Israeli-made SPYDER interceptors. Drone experts from Ukraine now advise the defenders too.

For example, the UAE reported attacks by 1,835 drones, 378 ballistic missiles and 15 cruise missiles. As of March 10, it claimed to have intercepted 94 per cent of the drones and 99 per cent of the missiles.

The deadliness of these attacks has varied.

Continuing lethality

In Israel, Iranian missiles have killed 20 people, implying roughly 4.1 deaths per hundred missiles arriving.

That’s less than the 5.1 the country saw during its 2025 war with Iran. But it’s four to 40 times higher than the rates it suffered from rockets in earlier Gaza and Lebanon conflicts.

In the Persian Gulf, Iranian projectiles have killed at least 15 civilians, 13 U.S. soldiers and seven merchant sailors.

There were about 0.6 deaths per hundred Iranian attacks in Kuwait, Bahrain and the UAE combined. That’s much lower than Israel’s rate, presumably because those countries were attacked by drones and short-range missiles carrying smaller warheads.

Interestingly, although the quantity of Iranian attacks fell after the first week, their lethality did not. Death rates per projectile in Arab countries showed little change week-to-week. In Israel, the rates were highest in Week 3.

In fact, Iranian missiles keep hitting precise targets, like U.S. military aircraft parked beside runways.

This implies Iran’s government has recovered from its initial surprise. It’s likely benefiting from Russian intelligence and Chinese technology too.

Tactical U.S. vs strategic Iran

So, U.S. and Israeli warplanes have bombed thousands of targets, killed thousands of civilians, and slowed Iran’s missile fire. But they haven’t stopped it.

That’s not surprising. Airstrikes alone didn’t stop rocket fire during Israel’s previous conflicts in Gaza and Lebanon. Ground invasions were needed for that.

U.S. President Donald Trump can post jingoistic mashup videos and “bullshit” about having “militarily won” the war in Iran. But he hasn’t achieved strategic outcomes like “unconditional surrender” from Iran or regime change there.

By contrast, Iran’s missiles have been strategically effective. They’ve damaged Persian Gulf refineries and halted tanker traffic. They’ve forced Trump to relax sanctions on Russian and Iranian oil, and on Belarusian fertilizer. And they’ve shown Arab monarchies that U.S. defence agreements have limited value.

Trump recently, and inadvertently, admitted this weakness. While discussing Iran’s closure of the Strait of Hormuz, he said “it would be great if we could do something, but they have to open it.”

This strategic failure despite tactical success is reminiscent of the Vietnam War. U.S. units had overwhelming firepower as they killed enemy soldiers. But body counts by themselves indicated little about strategic progress.

Some historians rank that war as the second worst U.S. foreign policy decision ever. The 2003 invasion of Iraq was ranked the worst.

Trump talks about being the greatest U.S. president in history. So, perhaps his Iran war will make him the new leader on that policy failure list.

The Conversation

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

ref. Iran’s attacks drone on, with the U.S. at risk of losing the war – https://theconversation.com/irans-attacks-drone-on-with-the-u-s-at-risk-of-losing-the-war-279295

L’ADN a parlé : la culture de la vigne en France date de plus de 4 000 ans

Source: The Conversation – France in French (2) – By Rémi Noraz, Doctorant en Archéobiologie et Paléoécologie, Université de Montpellier

Des pépins de raisin retrouvés sur des sites archéologiques peuvent sembler anodins. Pourtant, l’analyse de leur ADN donne accès à l’histoire plurimillénaire de la vigne cultivée.

Nous avons séquencé le génome de pépins vieux de plusieurs millénaires, révélant une histoire déjà entrevue par l’archéologie : celle de l’introduction de la viticulture en France, des échanges de cépages à l’échelle européenne et de pratiques agricoles anciennes qui ont laissé des traces jusqu’à aujourd’hui.

Nos résultats, publiés tout récemment dans Nature communications, montrent notamment que certains cépages emblématiques, comme le pinot noir variété phare de Bourgogne, étaient déjà présents au Moyen Âge.

Comment avons-nous analysé l’ADN de pépins de raisin vieux de 4 000 ans ?

L’histoire de la vigne s’est longtemps appuyée sur l’étude morphologique des pépins. Cette puissante approche a permis de distinguer de grandes tendances, notamment sur le caractère sauvage ou domestique des pépins, et retracer les débuts de la viticulture.

Cependant, certaines questions restaient difficiles à trancher : origine géographique des cépages, relations de parenté, ou encore les modes de multiplication (croisement ou reproduction clonale) et circulation des plants. L’ADN ancien pouvant être préservé au cœur même des pépins apporte ici une aide particulièrement décisive, comme témoin des relations entre les vignes du passé et celles d’aujourd’hui.

Nous avons ainsi analysé 49 pépins provenant de différents sites archéologiques, majoritairement français, et couvrant près de 4 000 ans, de l’âge du Bronze à la fin du Moyen Âge. Ces pépins gorgés d’eau ont été préservés dans des contextes spécifiques, humides, ayant contribué à une bonne préservation de leur ADN.

Pépins anciens (à gauche) et pépins modernes (à droite).
S. Ivorra, CNRS, Fourni par l’auteur

L’ADN a été extrait dans le laboratoire spécialisé en ADN ancien du Centre d’anthropobiologie et de génomique de Toulouse, conçu pour isoler et manipuler les molécules aussi rares que dégradées qui ont traversé les époques dans les restes archéologiques. Cet ADN ancien a pu être décrypté grâce à des technologies de séquençage de pointe jusqu’à en lire la totalité de l’information génétique, soit ici un texte génétique d’environ 500 millions de lettres.

Ces données permettent d’établir les relations génétiques entre individus, d’identifier les origines des cépages et de retrouver les techniques de propagations passées : soit par croisement, mélangeant des variétés d’origine ou de qualités distinctes ; soit par reproduction clonale (par bouturage, marcottage ou greffe) pour maintenir à l’identique dans le temps une variété qui leur était particulièrement précieuse.

Notre découverte prouve l’ancienneté de la viticulture

Les premières vignes cultivées apparaissent en France aux alentours de -600 avant notre ère, avec le développement des échanges méditerranéens, notamment du vin. Elles coexistent avec des vignes sauvages locales, et des croisements entre ces deux types contribuent à la diversité des cépages.

Les analyses génétiques confirment également l’existence de circulations à longue distance dès cette période. Des influences venues d’Ibérie, des Balkans ou du Proche-Orient témoignent des échanges des plants et de savoir-faire à l’échelle de la Méditerranée et, plus généralement, de l’Europe.

Autre point important : la multiplication clonale apparaît comme une pratique ancienne et commune, déjà en place dès l’âge du Fer. Elle a permis de maintenir certaines variétés d’intérêt sur de longues périodes et de les diffuser sur de longues distances.

C’est dans ce cadre que nous avons identifié un pépin médiéval considéré comme étant génétiquement identique au pinot noir actuel, illustrant la continuité de certains cépages sur plusieurs siècles.

Quelles perspectives pour ces recherches ?

L’apport de l’ADN ancien ne se limite pas à confirmer des scénarios existants : il ouvre aussi de nouvelles pistes.

En combinant données anciennes et modernes, il devient possible d’aller plus loin dans la caractérisation des vignes du passé. Des approches récentes permettraient par exemple d’inférer certaines caractéristiques des raisins anciens, comme la couleur des baies ou certains traits liés au goût.

Ces méthodes pourraient aussi permettre de mieux comprendre les adaptations des cépages aux environnements du passé, ou encore les choix opérés par les sociétés anciennes dans leurs pratiques agricoles.

À terme, ces recherches contribuent à mieux documenter la diversité génétique de la vigne et son évolution, un enjeu important dans le contexte actuel de changements climatiques.


Tout savoir en trois minutes sur des résultats récents de recherches, commentés et contextualisés par les chercheuses et les chercheurs qui les ont menées, c’est le principe de nos « Research Briefs ». Un format à retrouver ici.


The Conversation

Rémi Noraz a reçu des financements de l’ANR MICA (ANR-22-CE27-0026).

ref. L’ADN a parlé : la culture de la vigne en France date de plus de 4 000 ans – https://theconversation.com/ladn-a-parle-la-culture-de-la-vigne-en-france-date-de-plus-de-4-000-ans-279388

Décoloniser notre rapport aux animaux pour inventer un nouveau rapport au monde

Source: The Conversation – France in French (2) – By Cédric Sueur, Professeur des Universités en éthologie, primatologie et éthique animale, Université de Strasbourg

L’humain s’est placé au-dessus de toutes les autres espèces animales. Comment changer notre relation avec elles pour sortir d’une logique de domination et aller vers des formes de coexistence et de coopération ?


Chaque année, des milliards d’animaux sont élevés, transportés et abattus pour répondre aux besoins alimentaires, scientifiques ou industriels des sociétés humaines. Cette utilisation intensive du vivant pose une double question. Elle est d’abord éthique, car elle implique la souffrance et la mise à mort d’êtres vivants sensibles. Elle est aussi environnementale et sanitaire : la déforestation pour l’élevage intensif, la pollution conséquente et la proximité accrue entre espèces favorisent les déséquilibres écologiques et l’émergence de maladies.

Le concept de One Health (une seule santé) et la crise du Covid-19 rappellent que la santé humaine dépend étroitement de celle des animaux et des écosystèmes. Ces crises ne sont pas indépendantes. Elles révèlent un même rapport au vivant, fondé sur l’exploitation et la mise à distance physique et émotionnelle. Comprendre ce rapport est une condition nécessaire pour le transformer.

Une domination héritée : spécisme et colonisation

Les recherches en éthologie ont profondément renouvelé notre regard sur les animaux. De nombreuses espèces manifestent des émotions, des capacités d’apprentissage, des formes de coopération et des relations sociales complexes. Chez certains primates, mais aussi chez des éléphants, des corvidés ou des cétacés, on observe des comportements qui suggèrent des formes de conscience, d’empathie, de culture et de deuil.

À gauche : femelle macaque japonais gardant son bébé mort et probablement en deuil. À droite : comportement culturel de rodéo chez les macaques japonais.
Cédric Sueur, Alexandre Bonnefoy, Fourni par l’auteur

Pourquoi, malgré ces connaissances, continuons-nous à exploiter les animaux à grande échelle ? Une partie de la réponse tient à notre héritage culturel. Les sociétés occidentales modernes se sont construites sur une séparation entre l’humain et le reste du vivant, associée à une hiérarchisation qui place l’homme au sommet.

Le concept de « spécisme », inventé par Richard Ryder en 1970, désigne cette discrimination fondée sur l’espèce. Il conduit à considérer que les intérêts des humains priment systématiquement sur ceux des autres êtres qui souffrent tout autant. Dans sa structure, ce mécanisme n’est pas sans analogie avec le racisme ou le sexisme : il repose sur une différence érigée en critère de domination.

Décoloniser notre rapport aux animaux, de Cédric Sueur, éditions Odile Jacob, 2026.
Fourni par l’auteur

Le spécisme décrit cependant avant tout une attitude morale, un biais cognitif et éthique dans la manière dont nous évaluons les intérêts des différentes espèces. La notion de « colonisation animale », que je développe dans Décoloniser notre rapport aux animaux (Odile Jacob, 2026), cherche à aller plus loin en désignant les structures concrètes qui organisent et perpétuent cette domination.

Là où le spécisme interroge les représentations, la colonisation animale pointe les dispositifs institutionnels, économiques et culturels qui les rendent opératoires : les animaux sont appropriés, contrôlés, transformés en ressources économiques et symboliques. Le droit les protège partiellement en tant qu’êtres vivants sensibles, tout en les maintenant dans le régime des biens. L’économie en fait des marchandises et tend à invisibiliser les violences qui leur sont infligées. Ces dimensions se renforcent mutuellement et stabilisent un système de domination qui dépasse la seule question des représentations pour s’incarner dans des pratiques, des lois et des rapports de pouvoir.

D’autres ontologies du vivant

Cette manière de penser n’est pourtant pas universelle. De nombreuses sociétés non occidentales, comme les Achuar d’Amazonie, les aborigènes d’Australie ou les Japonais, envisagent les relations entre humains et non-humains autrement. Plutôt que de séparer radicalement les êtres, elles insistent sur les continuités, les interdépendances et les relations.

Les travaux de l’anthropologie, en particulier de Philippe Descola (les Lances du crépuscule, 1993) ou de Bruno Latour (Enquête sur les modes d’existence, 2012), ont ainsi montré l’existence de différentes « ontologies », c’est-à-dire des manières de définir et de se représenter ce qui existe et comment les êtres sont liés. Ces sociétés ou ethnies sont, par exemple, animistes et attribuent aux animaux une intériorité – autrement dit une vie intérieure faite d’intentions, d’émotions, de perceptions et de subjectivité propre, comparable à celle que nous reconnaissons aux humains – ou les considèrent comme des partenaires inscrits dans des réseaux de relations.

À Kuma Tsamé Totsi (Togo), des roussettes frugivores, protégées comme êtres tabous par le village, échappent à la chasse et forment d’importantes colonies, jouant un rôle clé dans la régénération forestière.
Cédric Sueur, Fourni par l’auteur

Sans idéaliser ces perspectives, elles offrent des ressources pour sortir d’une vision strictement utilitariste du vivant. Elles invitent à penser une coexistence fondée non sur la domination, mais sur la réciprocité et l’attention aux interdépendances.

Transformer nos pratiques quotidiennes

Décoloniser notre rapport aux animaux suppose d’abord de transformer nos pratiques les plus ordinaires. L’alimentation constitue un levier central : réduire la consommation de produits animaux permet de limiter à la fois la souffrance animale et l’impact environnemental.

Au-delà, il s’agit de repenser la manière dont nous partageons les espaces. L’urbanisation a longtemps exclu les autres espèces. Une approche « zooinclusive » développée par la chercheuse Émilie Dardenne propose au contraire d’intégrer leurs besoins dans la conception des villes : favoriser la présence d’oiseaux, d’insectes ou de petits mammifères, aménager des continuités écologiques ou encore adapter les bâtiments pour accueillir d’autres formes de vie.

Cette approche trouve déjà des traductions concrètes. Certaines villes européennes, comme Vienne, Bruxelles ou Londres, ont ainsi intégré des nichoirs et des gîtes à chauves-souris dans les façades de bâtiments rénovés. D’autres ont aménagé des passages fauniques sous les axes routiers pour permettre les déplacements des mammifères sauvages, ou encore maintenu des toitures végétalisées favorisant la biodiversité des pollinisateurs. À Singapour, la politique des « corridors verts » cherche explicitement à reconnecter des fragments d’habitats naturels au sein du tissu urbain. En France, la trame verte et bleue, inscrite dans la législation depuis le Grenelle de l’environnement, constitue une tentative institutionnelle d’intégrer ces continuités écologiques à l’échelle du territoire.

Ces transformations ne relèvent pas seulement de choix individuels, mais aussi de décisions collectives en matière d’aménagement et de politiques publiques.

Repenser la conservation de la faune sauvage

La protection des animaux sauvages s’inscrit souvent dans une logique de gestion : il s’agit de réguler, contrôler, parfois éliminer certaines populations jugées problématiques. Les carnivores sont particulièrement visés. En France, le loup cristallise les tensions entre éleveurs et défenseurs de la nature depuis son retour naturel dans les Alpes dans les années 1990. En Afrique, le lion fait l’objet de conflits similaires : lorsqu’il s’attaque au bétail des communautés rurales, il est perçu comme une menace directe pour la survie économique des familles, ce qui conduit à des empoisonnements ou des abattages, parfois tolérés voire encouragés par les autorités locales.

Les grands herbivores ne sont pas épargnés : en Afrique australe et orientale, les éléphants, dont les populations se sont reconstituées dans certaines zones protégées, provoquent des destructions massives de cultures, écrasent des habitations, tuent des êtres humains. Ces conflits humains-éléphants poussent des communautés à réclamer des abattages, voire à tolérer le braconnage comme seule réponse à une menace perçue comme existentielle. Le braconnage lui-même, souvent présenté uniquement sous l’angle criminel, s’alimente parfois de cette exaspération locale, même s’il est également structuré par des réseaux internationaux aux enjeux économiques considérables. Cette approche gestionnaire prolonge, sous d’autres formes, une relation de domination du vivant, ce que l’historien Guillaume Blanc nomme un nouveau colonialisme vert : des décisions prises depuis l’extérieur, au nom de la nature, sans tenir compte des réalités vécues par les populations locales.

Au Malawi, un éléphant traverse une réserve gérée par une ONG controversée, symbole des tensions entre conservation, accaparement des terres et droits des populations locales face aux modèles imposés étrangers.
Cédric Sueur, Fourni par l’auteur

Décoloniser la conservation consiste à reconnaître davantage l’autonomie des animaux, leur « souveraineté sauvage », comme la définissent les philosophes Donaldson et Kymlicka, et à respecter leurs habitats. Cela implique de passer d’une logique de contrôle à une logique de coexistence, en cherchant des formes de médiation entre les intérêts humains et non humains. Des initiatives de terrain, comme le projet Cibel dans la forêt du bassin du Congo, montrent qu’il est possible de concilier activités humaines et présence de la faune sauvage, à condition d’accepter la complexité de ces relations.

Décoloniser les sciences

La science elle-même n’échappe pas à ces enjeux. Les animaux y sont souvent considérés comme des objets d’étude ou des modèles expérimentaux. Intégrer leur « agentivité animale », c’est-à-dire leur capacité à agir et à influencer les situations, conduit à repenser les protocoles de recherche vers une coopération humain – non humain plutôt que vers des sacrifices animaux.

En primatologie, par exemple, certaines approches cherchent à limiter les contraintes imposées aux animaux et à mieux prendre en compte leurs comportements spontanés. Lancée par l’éthologue Tetsuro Matsuzawa, cette approche d’observation participante est une collaboration humanimale. Plus largement, le développement de méthodes alternatives permet de réduire le recours à l’expérimentation animale. Décoloniser les sciences ne signifie pas renoncer à la recherche, mais en interroger les présupposés et les finalités des utilisations animales.

Expérience comportementale de terrain à Shodoshima, au Japon, où un chercheur collabore avec un macaque dans une tâche cognitive, sans enfermement, contrainte ni stress pour l’animal.
Cédric Sueur, Fourni par l’auteur

L’expérimentation animale constitue un point de tension majeur. Si certains travaux sont justifiés par des enjeux de santé, d’autres apparaissent plus discutables au regard des souffrances infligées. Des outils comme le « cube de Bateson » proposent d’évaluer les recherches en fonction de leurs bénéfices attendus, de leur probabilité de réussite et des dommages causés aux animaux. Mais dans la pratique, la réflexion éthique reste souvent limitée. Décoloniser l’expérimentation suppose de renforcer ces exigences, de développer des alternatives et de questionner la légitimité même de certaines recherches.

Vers une coexistence

Décoloniser notre rapport aux animaux, c’est finalement transformer en profondeur notre manière d’habiter le monde. Il ne s’agit pas de supprimer toute relation avec eux, mais de sortir d’une logique de domination pour aller vers des formes de coexistence et de coopération, ce qui est nommé le « capital animal ». Les animaux ne sont plus de simples matériaux pour manger ou se vêtir, mais sont des aides sociales, des passeurs culturels (ils nous transmettent des informations sur notre environnement) et des managers écosystémiques (ils nous aident à gérer nos écosystèmes).

Ce changement est à la fois éthique, écologique et politique. Il implique de reconnaître que les humains ne sont pas extérieurs au vivant, mais en font partie. Dans un contexte de crises multiples, repenser nos relations avec les autres espèces apparaît non comme un luxe, mais comme une nécessité pour la survie de tous dont l’humanité.

The Conversation

Cédric Sueur est l’auteur de l’ouvrage « Décoloniser notre rapport aux animaux » publié aux Editions Odile Jacob dont l’article fait mention.

ref. Décoloniser notre rapport aux animaux pour inventer un nouveau rapport au monde – https://theconversation.com/decoloniser-notre-rapport-aux-animaux-pour-inventer-un-nouveau-rapport-au-monde-279056

Eau, biosignature et éclair : ce que nous a appris le rover Perseverance après cinq ans sur Mars

Source: The Conversation – France in French (2) – By Agnès Cousin, Astronome adjoint, Responsable scientifique de SuperCam, IRAP, Centre national d’études spatiales (CNES); Université de Toulouse

Le 10 mai 2025, 1 500 jours martiens après s’être posé sur le cratère Jezero, Perseverance se prend en photo. On peut voir la poussière qui s’est accumulée sur le rover durant tout ce temps. Nasa/JPL-Caltech/MSSS

Depuis cinq ans, le rover Perseverance nous en apprend plus sur la géologie de Mars, et ainsi sur les anciennes conditions de la Planète rouge. Aurait-elle pu abriter la vie par le passé ? Les études se succèdent, la dernière en date venant de sortir en mars 2026. On dresse le bilan des découvertes permises par SuperCam, l’un des instruments principaux du rover.


Le 18 février 2026, nous avons fêté les cinq ans de l’atterrissage du rover Perseverance sur Mars, dans le cratère de Jezero. À la suite du succès du précédent rover Curiosity, qui explore toujours la Planète rouge depuis son atterrissage en août 2012, la Nasa a lancé la mission « Mars 2020 ». Après plus de six mois de voyage, Perseverance se pose sur Mars avec en son bord de nombreux instruments, dont le nôtre, appelé SuperCam. C’est le début d’une nouvelle ère d’exploration martienne : la recherche de potentielles traces de vie ancienne et la collecte d’échantillons qui devraient un jour revenir sur Terre !

Bien sûr, nous nous intéressons aussi à la géologie et au climat de Mars. Le cratère Jezero n’a pas été sélectionné par hasard comme site d’atterrissage : les observations orbitales y montrent un ancien delta de rivière très bien préservé, ainsi que des signatures de carbonates, des minéraux qui se forment lorsque des roches interagissent avec de l’eau et du CO₂. Ce sont donc de précieux témoins des conditions qui régnaient lors de leur apparition sur Mars. Ces observations orbitales démontrent donc que l’eau a joué un rôle important dans l’histoire de ce site.

Photo noir et blanc du delta martien
Le delta qu’explore Perseverance, vue aérienne.
Nasa/JPL/Université d’Arizona

Sur Terre, les environnements des lacs et des deltas sont aussi les meilleurs pour piéger et préserver des molécules organiques, qui se retrouvent mélangées aux sédiments très fins transportés par la rivière, puis enfouies dans le delta où ils se déposent. Le site de Jezero fournit donc l’enregistrement d’un environnement passé propice à la conservation de molécules organiques et est, de ce fait, un bon endroit pour chercher des conditions favorables à l’émergence de la vie.

Durant les trois premiers mois de la mission, chacun des instruments et des sous-systèmes du rover ont pu se mettre en marche et commencer à fournir de précieuses informations. En particulier, cette période est marquée par le premier vol historique du drone Ingenuity, le 19 avril 2021. Ce démonstrateur technologique a prouvé la faisabilité de vols motorisés dans l’atmosphère ténue de Mars, ouvrant alors une nouvelle dimension de l’exploration martienne.

Explorer le fond d’un ancien lac martien

Parmi les sept instruments embarqués par Perseverance, on trouve SuperCam, qui constitue la « tête » du rover. Il a été développé en collaboration entre la France et les États-Unis. Cet instrument combine plusieurs spectromètres, des appareils capables d’analyser la composition chimique et minéralogique de la surface de Mars. En plus des spectromètres, SuperCam embarque une caméra, afin de documenter le contexte géologique des lieux où sont réalisées les analyses, et un microphone, qui permet d’étudier l’atmosphère de Mars. En France, nous sommes 13 instituts impliqués dans cette aventure martienne.

L’instrument SuperCam en laboratoire lors de sa conception
L’instrument SuperCam (ici lors de sa fabrication) a été construit par un consortium franco-américain mené en France par l’Institut de recherche en astrophysique et planétologie et le Cnes, et aux États-Unis par le LANL et le JPL. À ce jour, il a effectué plus de 650 000 tirs laser pour analyser plus de 1 300 roches, pris de nombreux spectres de lumière infrarouge, des photos et enregistré les sons de Mars.
Bruno Dubois/OMP, Fourni par l’auteur

Très rapidement après l’atterrissage, SuperCam a acquis un panorama d’une butte, nommée Kodiak, qui nous a permis de confirmer la nature du delta dans Jezero, à savoir qu’il est formé de sédiments charriés par une rivière se jetant dans un lac. Un tel système permet de reconstruire l’histoire passée de l’eau dans cette région. Ces observations nous ont montré que le niveau du lac fluctuait, mais qu’il s’agissait d’un lac fermé la plupart du temps, c’est-à-dire sans cours d’eau qui en ressort, contrairement à ce que les observations orbitales avaient suggéré auparavant.

Quinze mois plus tard, Perseverance est arrivé au pied du delta dont l’exploration a confirmé ces premières observations et a permis de mieux comprendre l’évolution du lac au cours du temps. Plus récemment, sur la bordure du cratère, SuperCam a découvert du quartz pour la première fois de manière certaine sur Mars ! Le quartz n’est pas rare lorsqu’il est observé dans une roche magmatique, du granite par exemple. Mais dans le cas de cette observation, le contexte est très différent, sans relation avec du volcanisme. Cette roche est probablement liée à un impact de météorite qui aurait facilité la circulation et la remontée d’eau chaude en fracturant la roche, créant un système hydrothermal et des conditions propices à la formation de quartz.

Entre la première photographie de Kodiak et l’arrivée au delta, la première campagne scientifique a débuté en juin 2021 en explorant deux types d’environnements géologiques du fond du cratère. Perseverance a d’abord trouvé des roches volcaniques. Pour se repérer sur Mars, les géologues donnent des noms informels aux zones étudiées. Ainsi la première formation de roches volcaniques a été appelée « Màaz ». Il s’agit d’une succession de coulées de lave à la surface. La seconde (appelée « Seítah ») correspond à un cumulât d’olivines, des roches constituées de gros grains obtenus en cristallisant un minéral, l’olivine, en profondeur sous la surface. Ces roches ont été très peu altérées par l’eau.

Les modèles suggèrent que ces deux environnements géologiques ne proviennent pas de la même source magmatique, mais de deux volcans différents ou de deux chambres magmatiques différentes sous un même volcan. Des échantillons de ces roches, s’ils reviennent sur Terre, nous permettront de dater ces terrains et de mieux comprendre leur mise en place par rapport à la formation du lac présent sur le site.

Mars, anciennement habitable, voire habitée ?

C’est en bordure de cet ancien lac que Perseverance a détecté, en 2024, les carbonates dont nous parlions plus haut, en grande quantité, confirmant les détections orbitales. Il est important de déterminer leur abondance in situ, car ces sédiments ont pu piéger le carbone de l’atmosphère, qui devait être plus épaisse dans le passé. L’analyse minutieuse de ces roches nous a permis de comprendre leur processus de formation : il s’agirait de roches magmatiques ayant longuement interagi avec l’eau du lac et du système hydrothermal, enrichie par le CO2 dissout dans l’eau.

La prise en compte de ce processus dans le cycle du carbone martien donne une nouvelle perspective au devenir du carbone et de l’habitabilité passée de cette planète. En effet, la communauté recherchait jusque-là des carbonates similaires aux calcaires des anciens fonds océaniques terrestres. Or, comme nous l’avons vu, les observations de Perseverance montrent qu’un autre processus de formation des carbonates a eu lieu sur Mars. Il faut donc le prendre en compte pour étudier le cycle du carbone martien et son influence sur les conditions climatiques passées, lesquelles déterminent combien de temps l’eau a pu rester liquide à la surface de Mars, qui en est dépourvue aujourd’hui. La présence d’eau étant nécessaire pour rendre la planète habitable, c’est ce qui rend cette découverte importante.

C’est d’ailleurs dans le même secteur, dans la vallée de l’ancienne rivière se déversant dans le lac, que Perseverance a détecté des traces potentielles de biosignatures. La présence simultanée de matière organique et de phosphate et sulfure de fer rappelle des réactions chimiques qui, sur Terre, sont parfois utilisées par les microorganismes dans des processus biologiques. Seule l’analyse sur Terre de ces échantillons pourra trancher sur l’origine de ces composés et répondre à la question de l’habitabilité passée de Mars.

Une étude récente, menée grâce au radar à bord du rover, a pu mettre en évidence la présence d’un environnement fluvial enfoui sous le delta actuel, démontrant que de l’eau circulait déjà il y a plus de 3,7 milliards d’années. Ces observations sont particulièrement importantes pour l’habitabilité passée de la planète et les recherches de biosignatures anciennes.

Écouter l’atmosphère sur une autre planète

Perseverance, depuis cinq ans, a aussi scruté l’atmosphère martienne. SuperCam et un autre instrument, MastCam-Z ont observé une aurore diffuse, comme une aurore boréale, mais qui ne se limite pas aux pôles, pour la première fois depuis la surface martienne. Mais c’est le microphone de SuperCam qui s’est nous a permis de sonder l’atmosphère de la planète, en dressant pour la première fois le paysage sonore martien. Ces écoutes permettent de déduire des propriétés importantes de l’atmosphère comme la vitesse du son qui varie selon la nature de l’atmosphère. Les bruits enregistrés sont aussi sensibles à la turbulence atmosphérique, ce qui permet d’étudier ces petits flux d’air proche de la surface.

Toujours grâce au microphone, nous avons récemment pu mettre en évidence des décharges électriques, de sortes de petits éclairs qui apparaissent dans des tourbillons qui soulèvent la poussière dans l’atmosphère. Cette détection permet d’apporter de nouvelles informations, car la dynamique des poussières dans l’atmosphère influe sur sa température et donc sur le climat. Ces petits éclairs pourraient aussi jouer un rôle insoupçonné dans la chimie atmosphérique et à la surface, par exemple en interagissant avec les composants chlorés pour former de nouvelles molécules, ou en cassant certaines molécules déjà existantes.

Après 43 km parcourus, et près de 1 500 roches martiennes analysées par SuperCam, Perseverance est désormais sorti du cratère de Jezero et explore sa bordure. Cette région expose des terrains vieux de plus de 3,8 milliards d’années, c’est-à-dire antérieurs à l’impact qui a formé le cratère, voire même à la formation du grand bassin régional Isidis dans lequel il se trouve. Ces roches sont les plus anciennes jamais étudiées in situ par un rover martien et offrent donc une fenêtre unique sur les premiers millions d’années de l’histoire de Mars. Les analyses en cours devraient révéler les conditions environnementales qui régnaient sur la planète rouge à cette époque reculée. Jezero tient bien ses promesses en termes de richesses des terrains, et de nombreuses découvertes nous attendent encore !

The Conversation

Agnès Cousin a reçu des financements du CNES, pour le projet Mars2020/SuperCam. Son laboratoire de recherche (IRAP) a aussi pour tutelle l’université de Toulouse et le CNES.

Olivier Gasnault a reçu des financements du CNES pour le projet Mars2020/SuperCam ; il est salarié du CNRS. Son laboratoire de recherche (IRAP) a aussi pour tutelle l’université de Toulouse.

Magali Bouyssou et Valérie Mousset 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 poste universitaire.

ref. Eau, biosignature et éclair : ce que nous a appris le rover Perseverance après cinq ans sur Mars – https://theconversation.com/eau-biosignature-et-eclair-ce-que-nous-a-appris-le-rover-perseverance-apres-cinq-ans-sur-mars-277423