Ancient Incans of all classes used coded strings of hair for record keeping – new research

Source: The Conversation – UK – By Sabine Hyland, Professor of Social Anthropology, University of St Andrews

The author studying a khipu. Author provided, CC BY-SA

The people of the ancient Incan empire kept careful records of their economics, religion, demographics and history. Those records took the form of knotted cords called khipus.

Until now, researchers believed that the only people who knew how to make khipus in the Inca empire (circa 1400-1532) were very elite, high-status officials. With little direct evidence about the Inca khipu experts, researchers like myself have relied on descriptions by colonial Spanish chroniclers.

According to written sources, khipus were made exclusively by high-ranking bureaucrats who enjoyed the finest food and drink. In the Inca tradition, there was no distinction between “author” and “scribe”; both roles were combined into one.

The term used to describe an Inca khipu maker, “khipu kamayuq”, derives from the verb “kamay” which refers to creation in the sense of energising matter. Khipu experts – “kamayuq” – energised the khipus they made by imbuing the cords with their own vitality.

I head a team of researchers that has uncovered new evidence that commoners also made khipus in the Inca empire, meaning khipu literacy may have been more inclusive than previously thought. The key to this discovery is the realisation that khipu experts sometimes “signed” the khipus they made with locks of their own hair.

In Inca cosmology, human hair carried a person’s essence. A person’s hair retained his or her identity even when it was physically separated from the body. A child’s first hair-cutting, for example, was a major rite of passage. The hair removed in this ritual was given as an offering to the gods or kept in the house as a sacred object.

The Inca emperor’s hair clippings were saved during his lifetime; after death his hair was fashioned into a life-size simulacrum that was worshipped as the emperor himself.




Read more:
The Inca string code that reveals Peru’s climate history


Historically, when human hair was tied onto khipus, the hair was the “signature” of the person from whom the hair was removed. Our team observed this recently in the highland village of Jucul in Peru, where villagers possess over 90 ancestral khipus, some made centuries ago.

On the khipus of Jucul, human hair attached to the primary cord represents the people who made each section of the khipu. This accords with earlier findings that herders in highland Peru tied their own hair to khipus “like a signature”, signifying their responsibility for the information on the cords.

Personal objects tied to or otherwise incorporated into the primary cord represent the khipu creator or author. For example, on a 16th-century khipu from the Andean community of Collata, strips of a leader’s insignia scarf tied to the primary cord symbolise the man who authored the khipu, imbuing the khipu with his authority.

In contrast, when khipus contained information about multiple people, each person’s data was signified by a band of pendants of the same colour or by including hair from multiple people in the pendants.

Analysing the hair

Our team identified an Inca-era khipu, known as KH0631, with a primary cord made entirely of human hair from a single person. Until now, khipus have not been examined for the presence of human hair, so it is unknown how often they contain hair.

The human hair in KH0631’s primary cord likely represented the person who made the khipu, marking the khipu with this person’s authority and essence.

The hair in the KH0631 primary cord, 104cm long, was folded in half and twisted when the khipu was made. Assuming hair growth at 1cm per month, the hair represents over eight years of growth.

To learn about the person who made the khipu, we undertook simultaneous carbon, nitrogen and sulphur isotope measurements from a sample at the end of the cord.

The presence of the C4 isotope (instead of C3) generally indicates the consumption of maize in Andean diets; the relative levels of stable nitrogen isotopes allow us to make inferences about the proportion of meat in the diet; and the levels of stable sulphur isotopes enables us to determine the amount of marine food sources.

Because the hair was doubled over, the loose end included hair cut nearest the scalp and hair from the end of the tresses. This meant the sample represented two periods of the person’s life separated by eight or more years.

Isotopic analysis of carbon, nitrogen and sulphur in human hair has been used to determine the diet of ancient Andeans. The diet of high-status versus low-status groups in the Inca state differed greatly.

A woman looking over a glass exhibit case
The author in the Pitt Rivers Museum, Oxford undertaking research.
Author provided, CC BY-SA

Elite people consumed more meat and maize-based dishes, while commoners ate more tubers, like potatoes and greens. To our surprise, isotopic analysis of the human hair in KH0631 revealed that this person had the diet of a low-status commoner, eating a plant-based diet of tubers and greens with very little meat or maize.

Sulphur isotope analysis shows little marine contribution to the diet, indicating that this person probably lived in the highlands rather than the coast. In the ancient Andes, elites feasted on meat and maize beer, while commoners dined on potatoes, legumes and pseudo-grains like quinoa. It appears that the khipu expert who made KH0631 was a commoner.

We don’t know where in the Andes KH0631 was made, so we tested the oxygen and hydrogen isotopes in the sample. Our results show that the person lived in the highlands between 2,600-2,800m above sea level in southern Peru or northern Chile (without better data on local water values, the exact location remains tentative).

This is the first time that isotopic analysis has been conducted on khipu fibres. The human hair “signature” in KH0631’s primary cord allowed us to learn more about the person who made this object.

Although other researchers have argued that only elite officials made khipus in the Inca empire, our new evidence suggests that commoners made khipus too – and that khipu literacy may have been more widespread than previously believed.


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The Conversation

Sabine Hyland receives funding from the John Simon Guggenheim Foundation, the British Academy, the Leverhulme Trust, the British Museum and the University of St Andrews Impact Fund.

ref. Ancient Incans of all classes used coded strings of hair for record keeping – new research – https://theconversation.com/ancient-incans-of-all-classes-used-coded-strings-of-hair-for-record-keeping-new-research-263063

Les professionnels de la santé ne sont pas à l’abri des préjugés envers les personnes handicapées

Source: The Conversation – in French – By Matthieu P. Boisgontier, Professor, Faculty of Health Sciences, L’Université d’Ottawa/University of Ottawa

Puisque les attitudes des praticiens de santé peuvent influencer les soins prodigués aux personnes en situation de handicap, intensifier les efforts pour améliorer ces attitudes devrait être une priorité des institutions de formation et des politiques de santé. (Shutterstock)

Nous avons tous des biais, qu’ils soient positifs ou négatifs, lorsque nous analysons les situations et les personnes qui nous entourent.

Par exemple, on peut spontanément penser, à tort, qu’une personne qui parle avec un accent est moins compétente, que les garçons sont naturellement meilleurs en mathématiques, ou encore qu’une personne avec un handicap physique a forcément des difficultés intellectuelles et qu’elle ne peut donc pas occuper un poste à responsabilités.

Qu’on le veuille ou non, ces biais psychologiques, aussi appelés attitudes, sont incrustés dans notre cerveau et influencent tant nos décisions que nos comportements au quotidien.

Les cliniciens ne sont pas à l’abri d’attitudes défavorables, notamment à l’égard de leurs patients.

Chercheur en neuropsychologie de la santé à l’Université d’Ottawa, je propose d’apporter un éclairage sur deux études que j’ai menées sur les attitudes envers les personnes en situation de handicap.

Testez vos propres biais en quelques clics !

Mes deux études se basent sur les données de participants répartis en trois grands groupes professionnels : les cliniciens (médecins, physiothérapeutes, ergothérapeutes, infirmiers), les assistants en réadaptation (notamment les aides-ergothérapeutes et aides-physiothérapeutes) et les personnes exerçant d’autres professions, pas forcément en relation avec la santé.

Ces données ont été recueillies pendant 19 ans sur le site Implicit Project, qui offre à n’importe qui, n’importe où dans le monde, la possibilité de tester gratuitement et anonymement ses attitudes dans différents domaines, tels que l’origine ethnique, la religion, le poids, la sexualité et le handicap.

Personnes handicapées ou personnes en situation de handicap ?

Avant de présenter mes deux études plus en détail, je dois préciser que mon choix de mots pour parler du handicap n’est pas dû au hasard.

L’expression « personne en situation de handicap » est parfois privilégiée, car elle met l’accent sur la personne plutôt que sur le handicap. À l’inverse, l’expression « personne handicapée » peut être perçue comme une réduction de la personne à son handicap.

Cependant, des recherches récentes montrent que l’utilisation du terme « personne en situation de handicap » ne réduit pas toujours les préjugés, et pourrait même renforcer la distance ou la condescendance.

De plus, imposer un seul type de langage pourrait occulter les préférences de chacun.

L’Association américaine de psychologie conclut que les deux formulations sont légitimes, tant qu’elles sont utilisées avec bienveillance et qu’elles respectent les préférences des personnes concernées.

Attitudes implicites et attitudes explicites

La première étude, publiée dans Physiotherapy Canada, se base sur les données de plus de 660 000 participants.

Elle a permis de caractériser l’évolution des attitudes envers deux types de handicaps : le handicap général, incluant la cécité par exemple (données récoltées de 2006 à 2021), et le handicap physique (données récoltées de 2022 à 2024).

L’étude teste aussi deux types d’attitudes : les attitudes explicites, qui peuvent être formulées consciemment en répondant à des questionnaires (par exemple : « je préfère les personnes qui ne sont pas en situation de handicap aux personnes handicapées »), et les attitudes implicites (ou automatiques), qui sont souvent inconscientes.

Le test d’association implicite, qui est notamment utilisé sur le site Implicit Project, permet d’évaluer ces attitudes implicites. Son fonctionnement est simple. Les participants doivent classer le plus rapidement possible et sans se tromper des mots et des images en associant, par exemple, des concepts de « bon » ou « mauvais » à des images illustrant le handicap ou l’absence de handicap.

Il importe cependant de noter que ce test n’est pas sans limites. En effet, son association avec les comportements réels est faible, ce qui pousse certains chercheurs à recommander l’ajout de mesures physiologiques des attitudes, comme l’activité cérébrale, ainsi que d’entretiens qui permettent de mieux comprendre les perceptions et les expériences des individus.

Un discours qui évolue, des automatismes qui persistent

Les résultats montrent que les attitudes explicites – soit celles qui sont déclarées par les participants – à l’égard des personnes handicapées sont devenues moins défavorables au fil des années.

Cependant, les attitudes implicites (inconscientes) sont restées relativement stables et défavorables.

En effet, pendant la période de l’étude, la population générale, incluant les cliniciens, semble avoir plus de difficulté à associer des images illustrant le handicap à des mots positifs qu’à des mots négatifs, en comparaison à des images illustrant l’absence de handicap.

Ces attitudes défavorables sont particulièrement marquées lorsqu’il s’agit de handicap physique, tel que représenté par des personnes en fauteuil roulant ou des personnes qui utilisent des béquilles ou une canne.

En comparaison, les attitudes semblaient légèrement moins négatives envers des formes de handicap plus générales, incluant par exemple des personnes aveugles et malvoyantes.

Les professionnels de la santé pas épargnés

La seconde étude, publiée dans European Rehabilitation Journal, s’est concentrée sur les données des années 2022 à 2024 portant uniquement sur le handicap physique et incluant plus de 210 000 personnes.

Les résultats renforcent l’idée d’une préférence implicite et explicite de l’ensemble de la population pour les personnes sans handicap, tout en montrant que les cliniciens ne sont pas mieux prédisposés que les autres professions.

Il semble donc que la profession ait peu d’effets sur les attitudes envers les personnes handicapées.

Cependant, d’autres facteurs ont émergé des analyses. D’une part, les hommes ont des attitudes plus défavorables envers les personnes handicapées que les femmes. D’autre part, les participants ayant une expérience personnelle du handicap, comme avoir des amis, des connaissances ou des membres de la famille handicapés, ou qui sont eux-mêmes handicapés, ont des attitudes plus favorables envers les personnes handicapées.

Un impact sur les soins de santé ?

La présence et la stabilité d’attitudes implicites défavorables chez les cliniciens soulèvent des questions quant à leur possible impact sur les soins prodigués aux patients.

En particulier, la première étude a montré que les attitudes étaient plus défavorables envers les personnes en situation de handicap physique qu’envers les personnes ayant d’autres types de handicaps, comme la cécité, potentiellement parce que ces derniers sont moins évidents.

Est-ce que cette différence d’attitudes pourrait rendre leur prise en charge moins équitable ? Ce n’est pas impossible. En effet, les attitudes, en plus de prédire les comportements futurs, influencent la prise de décision dans des contextes professionnels.

Par exemple, un clinicien ayant un biais implicite défavorable pourrait, sans s’en rendre compte, consacrer moins de temps à un patient en fauteuil roulant, douter de sa capacité à suivre un traitement, ou encore orienter ce patient vers des options moins ambitieuses de réadaptation.

De même, il pourrait accorder plus de crédibilité aux plaintes ou objectifs de santé d’un patient non handicapé qu’à ceux d’un patient ayant une limitation physique visible. Ces décisions, bien qu’anodines en apparence, peuvent en s’accumulant aboutir à des inégalités d’accès, de qualité ou d’expérience des soins.

professionnelle de la santé avec un patient en chaise roulante dans un corridor d’hôpital
Un clinicien ayant un biais implicite défavorable pourrait par exemple, sans s’en rendre compte, consacrer moins de temps à un patient en fauteuil roulant, douter de sa capacité à suivre un traitement, ou encore orienter ce patient vers des options moins ambitieuses de réadaptation.
(Shutterstock)

Le poids du capacitisme

Ces résultats illustrent la tendance de nos sociétés à considérer une personne handicapée comme intrinsèquement moins capable ou moins importante que les personnes qui ne sont pas en situation de handicap.

Cette dévalorisation des personnes en situation de handicap s’appelle le « capacitisme ». Tout comme le racisme, le sexisme et l’âgisme, le capacitisme ostracise une partie de la société en réduisant, consciemment ou inconsciemment, leurs opportunités de participer à la vie de leurs collectivités.

Historiquement, le handicap a longtemps été perçu comme une anomalie à corriger pour correspondre aux normes de la société.

Si de nos jours, les modèles de référence ont dépassé cette vision réductrice du handicap, mes résultats suggèrent que le capacitisme continue d’imprégner notre société, de façon systémique et culturelle, influençant jusqu’à nos professionnels de la santé.

Comment réduire ces biais ?

Même si nos attitudes déclarées envers les personnes en situation de handicap se sont améliorées au fil des années, nos préjugés inconscients persistent.

Ce constat souligne l’importance de mettre en place des stratégies éducatives plus efficaces.

Les interventions les plus prometteuses sont celles qui vont au-delà de la simple transmission d’informations en ajoutant des rencontres et des expériences, directes ou indirectes, avec des personnes handicapées. Cette exposition favorise l’empathie.

Pour déconstruire les stéréotypes de façon durable, il faut multiplier ces occasions de côtoyer des personnes handicapées.

Puisque les attitudes des praticiens de santé peuvent influencer les soins prodigués aux personnes en situation de handicap, intensifier les efforts pour améliorer ces attitudes devrait être une priorité des institutions de formation et des politiques de santé.

À une époque où les idéaux d’équité sont à la fois en progrès et en danger, la lutte contre ces tendances psychologiques défavorables aux personnes handicapées est non seulement essentielle pour améliorer leurs soins, mais aussi une priorité éthique pour la société que nous voulons construire pour notre futur.

La Conversation Canada

Dr. Matthieu P. Boisgontier est professeur à la Faculté des sciences de la santé et directeur de l’Ecole des sciences de la réadaptation de l’Université d’Ottawa, au Canada. Il est chercheur senior à l’Institut du Savoir Monfort et au Bruyère Health Research Institute d’Ottawa. Il est le manager principal de Peer Community In (PCI) Health & Movement Sciences. Il est également rédacteur en chef du journal Communications in Kinesiology et membre de la Society for Transparency, Openness, and Replication in Kinesiology (STORK).

ref. Les professionnels de la santé ne sont pas à l’abri des préjugés envers les personnes handicapées – https://theconversation.com/les-professionnels-de-la-sante-ne-sont-pas-a-labri-des-prejuges-envers-les-personnes-handicapees-252847

How a global plastic treaty could cut down pollution – if the world can agree one

Source: The Conversation – UK – By Will de Freitas, Environment + Energy Editor, The Conversation

Pol Sole/Shutterstock

The “Paris agreement for plastic” was set to be finalised at the end of this week.

But after a week and a half of intense discussions in Geneva, Switzerland, where negotiators from 180 countries are gathered, the talks are at risk of delivering a much weakened agreement (if one can be finalised at all).

“With less than 48 hours to go”, writes one academic in Geneva, “the window for action is closing”.

What has gone wrong in Geneva? And what do experts think needs to be part of a treaty in order to make it effective?

Running into resistance

Writing at the start of this round of negotiations on August 5, social scientists Cat Acheson, Alice Street and Rob Ralston of the University of Edinburgh, highlighted various elements in the draft text which could make a real difference.

“These include cutting plastic production (Article 6), banning plastic products and chemicals that are hazardous to humans or the environment (Article 3), and a section dedicated to protecting human health (Article 19).”

But many countries are pushing back. Winnie Courtene-Jones, our expert in Geneva, is a lecturer in marine pollution at Bangor University. She says the same political disagreements that have stalled previous talks remain unresolved:

“Resistance largely comes from a bloc of countries with strong petrochemical industries and interests, unwilling to compromise or pursue ambitious measures.”

This is the “like-minded group” of countries that has frustrated attempts to include these aims since the talks began in Uruguay in November 2022. Nearly all plastic is made from fossil fuel, hence the shared position of major petrochemical producers including Saudi Arabia, Russia and Iran – plus the large presence of people working for oil and gas firms and plastic manufacturers at the negotiations.

This cohort favours an agreement that seeks to manage waste, rather than cap plastic production.

“They have done so by arguing that plastics are in fact essential for protecting health, due to the role of single-use plastic in modern medicine,” Acheson and colleagues say.

From womb to grave

Petrostates citing the needs of healthcare workers in their arguments against limiting how much plastic is made worldwide are probably disingenuous. A landmark report published last week in the Lancet medical journal shows why.

“Plastics, the evidence shows, are a threat to human health – from womb to grave,” say Acheson, Street and Ralston. “They’re linked to miscarriages, birth defects, heart disease and cancer.”

The report highlights how more than 16,000 chemicals are used in plastic, many of which are not disclosed by the companies making it. Plastic chemicals are tied to health effects at all stages of human development, though foetuses, infants and young children are thought to be especially susceptible.

Less than 10% of plastic is recycled, the Lancet states. Much of it leaks out at various stages between use and disposal and breaks down into tinier and tinier fragments. Plants and worms in the soil and plankton in water ingest or absorb these microplastics, and are in turn eaten by larger organisms. This is how plastic travels through food webs – and eventually reaches us.

“It is now clear that the world cannot recycle its way out of the plastic pollution crisis,” according to the Lancet report.

woman's hand putting plastic bottle into colourful street recycling bin
The world cannot recycle its way out of the plastic pollution crisis.
siam.pukkato/Shutterstock

Plastic-eating microbes

There are some promising developments.

Just a few days ago, Julianne Megaw, a lecturer in microbiology at Queen’s University Belfast, reported the findings of her latest research on microbial degradation, which she says involves “harnessing the natural abilities of certain bacteria and fungi to break down plastics in ways that current technologies cannot”.

Such microbes are often found in polluted sites, but Megaw’s research shows they’re also found in more pristine environments. Some were able to degrade plastics by around 20% in a month without any pretreatment.

These results are “among the highest biodegradation rates ever recorded for these plastics,” writes Megaw. “This suggests that we don’t have to stick to polluted sites. It’s possible that we could find microbes with excellent plastic-degrading potential anywhere.”

This is great news of course. Maybe one day billions of friendly microbes will be set loose to clear up a century or two of plastic pollution. But even in the most optimistic scenario, we’re still some way off being able to use microorganisms at scale.

Reaching the limit?

And so that leaves the idea of placing limits on total plastic production. Research by Costas Velis, a lecturer in resource efficiency at the University of Leeds, indicates why an effective treaty will need to include some kind of global cap:

“All efforts to scientifically model the extent of plastic pollution in the future assume that restricting how much plastic the world makes each year will be necessary (among other measures) to curb its harmful presence in the environment.”

But even if countries can phase down plastic manufacturing, Velis cautions that we would have much further to go to solve the problem.

“Cutting production almost in half and using all other strategies, such as ramping up recycling and disposing of plastic waste in landfills or via incineration plants, would still leave residual pollution in 2040,” he says.

Waste management reforms, changes to the design of remaining plastic products and mandates for retailers will also be necessary.

“It could be possible to massively simplify the types of polymers used in packaging so that just a few are in circulation. This would make recycling more effective, as one of the present complications is the huge variation in materials that leads to cross-contamination. Likewise, countries could massively expand systems for reusing and refilling containers in shops,” he says.

You and I will have to get used to living with much less plastic as well – a marked shift in our lives for which there is little precedent, Velis says. A result in Geneva that reins in the expanding plastic industry could at least kickstart that process.

“Every year without production caps makes the necessary cut to plastic production in future steeper – and our need to use other measures to address the problem greater,” he says.

Whatever happens in the next few days, be sure to check out the latest coverage here on The Conversation. We have plastics experts lined up to assess the final treaty – or explain why talks ultimately did collapse.

Post-carbon

Last week, we asked you if growing awareness of microplastic contamination had affected your behaviour.

Stefan Frischauf said that plastic bags are a nightmare and, as an architect, “rebuilding and reuse of materials should be regulated in much more severe ways”.

Babette Schouws says: “I have stopped buying clothes made of polyester or other plastic materials … I always check the tag before I try something on.”

And Tina Grayson set up “a small business selling our solid shampoo and conditioner bars”. Each bar, she says, saves about three plastic bottles. “This is our contribution to the ever worrying increase of plastics and microplastics in our world – as well as doing other things in our house such as ordering milk from the milk man in glass bottles rather than buying plastic ones from the supermarket, using chewable toothpaste, using toothbrushes without plastic handles, buying our loo paper from Bamboo which is wrapped in paper etc.”

Next week, we’d like to know if severe heatwaves in the UK, southern Europe or beyond have affected your holiday plans. Will you try and avoid 40°C temperatures or head for a dip in the sea to cool off?


Don’t have time to read about climate change as much as you’d like?

Get a weekly roundup in your inbox instead. Every Wednesday, The Conversation’s environment editor writes Imagine, a short email that goes a little deeper into just one climate issue. Join the 45,000+ readers who’ve subscribed so far.


The Conversation

ref. How a global plastic treaty could cut down pollution – if the world can agree one – https://theconversation.com/how-a-global-plastic-treaty-could-cut-down-pollution-if-the-world-can-agree-one-262816

Fossils are scientific evidence, and shouldn’t be auctioned for millions to private buyers

Source: The Conversation – Canada – By Jessica M. Theodor, Professor of Biological Sciences, University of Calgary

Last year, a Stegosaurus nicknamed “Apex” sold at auction for US$40.5 million. A juvenile Ceratosaurus fetched US$30.5 million just last month.

Supporters of these sales argue that they’re harmless, or even good for science. Others compare fossils to art objects, praising their beauty or historical charm.

As paleontologists, we say plainly: these views could not be more misguided.

Fossils are neither art objects nor trophies. They are scientific data that provide a tangible record of Earth’s deep history. Fossils are essential tools for understanding evolution, extinction, climate change and the origins and disappearances of ecosystems.

Their true value lies not in their price tags, but in what they teach. Of course, some fossils are beautiful. So are endangered white rhinoceros, but no one argues that rhinos should be auctioned off to the highest bidder. A fossil’s worth isn’t defined by it’s beauty, but by its permanent scientific accessibility.

Science versus ownership

Paleontologists are historians of deep time, studying life through millions of years. Our field is a science built upon the same fundamental principles as any other scientific disciplines. Data must be transparent, accessible, replicable and verifiable. For that to happen in paleontology, fossil specimens must be housed in public institutions with permanent collections.

Paleontological research is only scientific if the specimens under study are catalogued in public institutions that ensure access in perpetuity, so that other researchers can examine and continually assess and reassess the data fossils preserve.

That’s what makes the 1997 auction of the Tyrannosaurus rex specimen known as Sue different from today’s fossil auctions. Though it was a private sale, Sue was purchased by a public-private consortium, which included the Field Museum of Natural History (FMNH) in Chicago, the Walt Disney Company, McDonald’s Corporation and private donors. Sue’s skeleton was immediately placed in the public trust at the FMNH, an accredited museum, and formally catalogued.

Sue didn’t vanish into the private collection of an anonymous buyer. Instead, the T. rex became an accessible scientific resource for scientists and the public. This is exactly what should happen with all scientifically significant fossils.

Increasingly, some of the most remarkable fossils unearthed have gone into the vaults of private collectors. Even when buyers temporarily loan specimens to museums, as with Apex the Stegosaurus, these fossils remain off limits to meaningful scientific study.

Perpetual access

Leading scientific journals won’t publish research based on them for a simple reason: science demands permanent access.

Paleontological science depends on transparency, reproducibility and data reproducibility. A privately held fossil, no matter how spectacular, can disappear at any time on the whim of an owner. That uncertainty makes it impossible to guarantee that we can verify findings, repeat analyses, or use new technologies or methods on original material in the future.

Contrast that with fossils that are held in the public trust, like Sue the T. rex. Sue’s skeleton has been on display for nearly 20 years, and has been studied again and again. And as technology evolves, we address new scientific questions about ancient remains and deepen our understanding of the distant past, one study at a time.

Professional standards matter

It may be tempting to justify the commercial fossil trade by pointing to dinosaur-themed movies and toys, as if pop culture is a stand-in for real science. That is akin to arguing that paint-by-numbers kits are a good substitute for the art held in the Louvre. High-profile sales mislead the public by promoting the idea that completeness or large size are the only things that make a fossil significant.

The Society of Vertebrate Paleontology, the world’s largest organization of professional paleontologists, has created ethical guidelines to reflect professional research standards. Critics have called them too strict, saying the rules should be “loosened.” But loosening our ethical standards would mean abandoning the very core of the scientific method in favour of convenience and profit.




Read more:
Thirty years after Jurassic Park hit movie screens, its impact on science and culture remains as strong as ever – podcast


It is unethical to sell human fossils or cultural artifacts to private collectors. The same standard should apply to dinosaurs and other fossil vertebrates. Fossils, whether common or spectacular and rare, are an irreplaceable record of our planet’s history.

Funding the future

Science should not be for sale. We suggest that fossil-loving millionaires and billionaires put their money where it can make a transformative difference. Instead of buying one skeleton, we encourage these fans to support the research, museums, students and scientific societies that breathe new life into ancient bones.

One single fossil’s price tag could fund years of groundbreaking discoveries, education and exhibitions. That’s a legacy worth leaving, especially at a time when funding for science is dwindling.

The Conversation

Jessica M. Theodor receives funding from the Natural Sciences and Engineering Research Council of Canada. She is a former president of the Society of Vertebrate Paleontology.

Kenshu Shimada is chair of Society of Vertebrate Paleontology’s Government Affairs Committee.

Kristi Curry Rogers is Vice President of the Society of Vertebrate Paleontology.

Stuart Sumida is president of the Society of Vertebrate Paleontology

ref. Fossils are scientific evidence, and shouldn’t be auctioned for millions to private buyers – https://theconversation.com/fossils-are-scientific-evidence-and-shouldnt-be-auctioned-for-millions-to-private-buyers-262777

Alzheimer : la réalité virtuelle, dernière bouée pour les proches aidants ?

Source: The Conversation – in French – By Sivime El Tayeb El Rafei, Étudiante candidate au doctorat en technologie éducative, Université Laval

Dans l’ombre des soins, des milliers de personnes proches aidantes (PPA) vivent fatigue, isolement et détresse, souvent ignorées par le système de santé. Pourtant, une solution prometteuse émerge : une formation humaine et novatrice, rendue possible grâce à la réalité virtuelle.

Derrière chaque statistique, il y a des histoires poignantes : un octogénaire seul avec sa conjointe atteinte d’Alzheimer, une jeune mère aidant à la fois son mari malade et son enfant handicapé, ou ce vieil homme de 81 ans qui a mis fin à la souffrance de sa conjointe par désespoir.

En 2050, près de 211 600 personnes au Québec endosseraient ce rôle, prodiguant plus de cinq millions d’heures de soins par semaine. En 2021, le Québec adoptait une politique nationale, à la suite de la loi 56 ou LPPA qui reconnaît les personnes proches aidantes comme des acteurs essentiels du soin.

Pourtant, sur le terrain, l’offre de formation reste limitée : horaires rigides, contenus trop théoriques, peu adaptés aux réalités rurales ou multiculturelles. Résultat : ces partenaires de soins peinent à endosser la responsabilité de prestation de soins. Elles ont souvent besoin d’information et de formation pour comprendre la maladie d’Alzheimer.

Titulaire d’un doctorat en technologie éducative à l’Université Laval, j’ai cumulé plus de 20 ans d’expérience en enseignement et en conseil pédagogique au Liban et au Québec. J’ai notamment accompagné des enseignants dans l’intégration des technologies numériques et la conception de formations présentielles et distantielles.

La réalité virtuelle à la rescousse

Et si on pouvait apprendre à être proche aidant autrement ? C’est déjà le cas dans plusieurs pays. En France, la Maison des Aidants en Normandie et l’entreprise SocialDream utilisent des casques de RV pour simuler des situations du quotidien : refus de soins, agitation, confusion. Aux États-Unis, Embodied Labs offre des formations en RV aux PPA et au personnel de la santé pour mieux comprendre la maladie d’Alzheimer. D’ailleurs, le Department of Veterans Affairs rapporte une augmentation de 34 % de la confiance des aidants après des formations en RV.

En Australie, le programme D-Esc est conçu pour former les travailleurs sociaux à gérer les comportements des personnes vivant avec la maladie d’Alzheimer. Au Canada, VRx@Home permet à des aidants d’utiliser la RV à domicile pour soulager leurs proches atteints d’Alzheimer.


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Pourquoi miser sur la réalité virtuelle ?

Utilisée de plus en plus en santé mentale, la réalité virtuelle fait ses preuves dans les traitements psychothérapeutiques des personnes âgées en institution qui souffrent de problèmes psychiques liés à la perte de mémoire et à la douleur somatique.

Mais son potentiel ne s’arrête pas la. Grâce à l’automatisation des thérapies immersives, ce service deviendrait plus accessible et abordable et réduirait la demande de thérapeutes qualifiés.

À la croisée de l’immersion, de l’interaction et de l’imagination, la réalité virtuelle s’impose aujourd’hui comme un outil pédagogique polyvalent. Qualifiée d’« accélérateur » ou d’« amplificateur de formation », elle est capable de rendre les apprentissages plus concrets et engageants.

Prenons par exemple une femme de 50 ans qui travaille à temps plein et s’occupe de sa mère atteinte d’Alzheimer. Elle a peu de temps pour suivre des formations en personne. Grâce à un programme de formation en RV, elle peut, depuis chez elle, vivre des scènes réalistes, comme une crise d’agitation en pleine nuit, et apprendre comment réagir avec calme et efficacité. En quelques sessions, elle se sent mieux outillée, moins seule, et surtout, comprise.

Plus qu’un outil technologique

La force de la réalité virtuelle, c’est son pouvoir d’immersion. Elle ne se contente pas de montrer : elle fait ressentir. L’aidant ne regarde pas passivement une vidéo, il devient acteur. Il voit le monde à travers les yeux d’une personne malade, ressent ses frustrations, ses angoisses. Cette immersion change la perspective et, souvent, les comportements.

Des études montrent que la RV peut aussi réduire l’isolement des aidants et améliorer leur bien-être psychologique. C’est une façon concrète d’allier formation, soutien émotionnel et accessibilité. La RV peut aussi être une valeur ajoutée aux services classiques de la télésanté et un complément aux formations traditionnelles.

Un virage possible pour le Québec

Le Québec dispose déjà d’expertises locales, comme le programme MEMO, conçu en collaboration avec le Conseil national de recherches du Canada (CNRC), qui utilise déjà la RV pour stimuler les capacités cognitives des personnes vivant avec des troubles neurocognitifs. Il est temps de faire un pas de plus, en s’adressant à celles et ceux qui les soutiennent chaque jour.

Imaginez : une femme en région éloignée pourrait suivre une formation de qualité sans devoir se déplacer. Un homme peu à l’aise avec les formations en ligne classiques pourrait, avec un casque, expérimenter une situation et apprendre « sur le terrain », de façon interactive et engageante.

Pour que cela devienne réalité, il faut investir dans des projets pilotes, co-construits en collaboration avec les milieux communautaires, les universités, les PME innovantes et, surtout, avec les personnes concernées : les PPA elles-mêmes. Il faut créer des formations adaptées et flexibles, en français, et ancrées dans les réalités culturelles du Québec.

En janvier dernier, le gouvernement du Québec a lancé une nouvelle politique sur la maladie d’Alzheimer, qui évoque déjà l’importance de l’innovation.

Oser le changement

Les initiatives internationales démontrent qu’il est possible – et souhaitable – d’utiliser la réalité virtuelle pour soutenir les personnes proches aidantes. Sans ignorer les aspects éthiques de leur usage, ces outils sont des solutions concrètes, accessibles, humaines. Il est temps que le Québec franchisse ce cap.

Soutenir les PPA, c’est défendre des valeurs fondamentales : équité, dignité, inclusion. À l’heure où l’on parle d’innovation et de transformation sociale, il faut mettre la technologie au service de l’humain. La RV peut être une lumière d’espoir pour celles et ceux qui, comme le disait l’infirmière et autrice suisse Rosette Poletti, apprennent à danser sous la pluie, plutôt que d’attendre la fin de l’orage.

Le Québec ne manque ni de compétences, ni de ressources. Ce qu’il nous faut maintenant, c’est une véritable volonté politique, un brin d’audace, et surtout, beaucoup d’écoute.

La Conversation Canada

Sivime El Tayeb El Rafei fait en temps en temps du bénévolat dans la société d’Alzheimer de Québec pour animer un atelier pour les proches aidants et aidantes. Elle était proche aidante de son père atteint de la maladie d’Alzheimer qui est décédé en novembre 2023. C’est la raison pour laquelle elle s’intéresse à la cause des personnes proches aidantes, fait du bénévolat pour apporter de l’appui à cette population vulnérable et veut contribuer, par sa recherche, aux avancées scientifiques. Donc il n’existe aucun conflit d’intérêt.

ref. Alzheimer : la réalité virtuelle, dernière bouée pour les proches aidants ? – https://theconversation.com/alzheimer-la-realite-virtuelle-derniere-bouee-pour-les-proches-aidants-257681

Israel’s opposition: against Benjamin Netanyahu but not yet for peace with the Palestnians

Source: The Conversation – UK – By John Strawson, Emeritus Professor of Law, University of East London

Sunday is the first day of the working week in Israel – but the upcoming Sunday August 17 promises to be a day of strikes and demonstrations. There’s a groundswell of public opposition to prime minister Benjamin Netanyahu’s promised all-out offensive against Gaza city as well as a growing sense of desperation at the plight of the remaining hostages.

The question is how will these actions on the streets translate into a coherent political alternative to Netanyahu in Knesset elections? The next election must take place by October 2026 – but it might well happen sooner.

Netanyahu has presided over the most right-wing government in the country’s history. During his current term from October 2022, mass protests have been a feature of Israeli society. Initially they were against the government’s attack on the powers of the supreme court, which many saw as a more general attack on democracy.

Now, with the failure of the military operation in Gaza to secure the release of all the October 7 hostages, the need to secure a ceasefire or a more permanent end to the war to bring the hostages home has become the focus of public protests. August 17 is likely to involve the largest national mobilisation yet.

But despite the mass action on the streets, Israel’s opposition parties have remained divided on policy and largely united only in their dislike of Netanyahu. Only the left: the Labor Party and Meretz seem to have grasped that the time has come to offer the country a clear political alternative.

After decades of rivalry, they’ve merged into one party, the Democrats, under the leadership of charismatic former deputy chief of staff of the Israel Defense Forces, Yair Golan.

Yesh Atid (which translates as There is a Future) led by Yair Lapid offer a broadly centrist political platforms. Like the Democrats, Yesh Atid has been active in the campaign for securing the release of the hostages but is largely silent on any resolution of the conflict with the Palestinians.

The rest of the opposition: Benny Gantz’s Blue and White and Avigdor Leiberman’s Yisrael Beitenu are firmly on the centre-right. Gantz’s party places security as its main policy but has been open to compromise with Netanyahu on the judicial reforms. Leiberman’s party is rooted among Russian immigrants and maintains a nationalist position. Once a Netanyahu associate, he is now a major critic.

Israel’s electoral system requires parties to work together to forge coalitions. Netanyahu did so in November 2022 with the support of the most right-wing parties in the Knesset. Now the polls are predicting that it is Naftali Bennet, who served as prime minister from June 2021 to June 2022, who is shaping up as the most likely candidate to lead the opposition bloc into the next election.

Bennett led a broad coalition which briefly interrupted Netanyahu’s second period in office. Consequentially, his government was supported by Mansour Abbas’s Ra’am, or United Arab List. Abbas’s presence in the coalition underlines the significance of the role that Arab parties potentially play in Israeli politics, representing, as they do, 20% of Israel’s population in a system where lawmakers are chosen by proportional representations.

But Israel’s Arab parties, which range across different shades of Islamism, Arab nationalism and socialism, are as factionalised and divided as the Jewish parties.

What the public want

A lot will depend on how the parties handle the war and hostage questions. Opinion polls consistently show there is a large majority of Israelis (74%) in favour of ending the war in Gaza and bringing the hostages home.

A majority of people, 55%, now think that Netanyahu is handling the war badly . This level of approval, together with mass action on Israel’s streets, presents an opportunity for Israel’s opposition parties to paint themselves as a viable alternative government.

Now, nearly two years after the October 7 attack, with the unresolved hostage situation, mounting settler violence on the West Bank and Israel becoming ever more isolated internationally, this issue has become even more acute. People want the war to end.

But this doesn’t translate into support for a two-state solution, which has fallen since October 7 to a small minority of 21% of voters.

It’s not what will bring people on to the streets on August 17. During the last major period of public unrest – the pro-democracy protests of two years ago – the organisers of the marches actively discouraged comparisons between the attack on democracy in Israel and the decidedly undemocratic Israeli occupation of the West Bank and Gaza.

While today there are groups such as Jewish-Arab Standing Together who make that case, especially after the course of the Gaza war, these forces are far from the mainstream of even the most activist opponents against Netanyahu’s war.

Sunday’s demonstrations will be a significant moment for Israel and a real challenge to Netanyahu’s government. It is possible that in the next few months his government will fall over the withdrawal of the ultra-orthodox parties who are angry about the goverment’s decision to revoke the exemption for ultra-orthodox Jews from the armed forces.

This is likely to make passing a budget problematic and may well trigger an elections much earlier than scheduled. Netanyahu could well face an electorate exhausted by the trauma of October 7, wars on many fronts and rising Israeli casualties in Gaza.

If the opinion polls are right, and an anti-Netanyahu bloc wins a majority, there could even be a new government in the next six months.

But to dismiss a more permanent settlement with Palestine cannot be viable in the long term. Any government committed to defending Israeli democracy will find that it is incompatible with continuing denial of Palestinian democracy. Unless there is peace with its Palestinian neighbours, Israel will not be at peace with itself.

The Conversation

John Strawson 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. Israel’s opposition: against Benjamin Netanyahu but not yet for peace with the Palestnians – https://theconversation.com/israels-opposition-against-benjamin-netanyahu-but-not-yet-for-peace-with-the-palestnians-262975

US presidents have always used transactional foreign policy – but Trump does it differently

Source: The Conversation – UK – By Patrick E. Shea, Senior Lecturer in International Relations and Global Governance, University of Glasgow

The US president, Donald Trump, watched on recently as the leaders of Armenia and Azerbaijan shook hands in the White House. They had just signed what Trump called a “peace deal” to end nearly four decades of conflict.

The deal grants the US exclusive rights to develop a transit corridor through southern Armenia, linking Azerbaijan to its exclave of Nakhchivan. The White House says the corridor will be named the Trump Route for International Peace and Prosperity.

Trump has positioned the US as the guarantor of security in the South Caucasus, packaging this as a commercial opportunity for American companies. This exemplifies what researchers call transactional foreign policy, a strategy that offers rewards or threatens costs to get others to act rather than persuading them through shared values.

US presidents have long mixed economic incentives with diplomacy. But Trump’s approach represents something very different. It’s a foreign policy that operates outside institutional constraints and targets democratic allies. It exploits American power for personal gain in ways no previous president has attempted.

US presidents have commonly used transactional approaches in their foreign policy. In the early 20th century, Theodore Roosevelt promised to protect Latin American governments from internal rebels and external European intervention to ensure debt payments to American bankers.

This sometimes required the US military to take control of customhouses, as happened in Dominican Republic in 1905 and Cuba in 1906. Presidents Howard Taft, Woodrow Wilson and Calvin Coolidge ordered similar military interventions in Nicaragua in 1911, Honduras in 1911 and 1912, Haiti in 1915 and Panama in 1926.

In the mid-20th century, presidents Harry Truman and John F. Kennedy innovated foreign aid policy in an attempt to dampen the appeal of communism. They did so specifically through land reform policies.

American officials viewed rural poverty in developing countries as fertile ground for communist recruitment during the cold war. So US aid was used to promote food price stabilisation and facilitate land distribution.

Around the same time, Dwight Eisenhower applied financial pressure on the UK during the 1956 Suez crisis. Britain and France, coordinating with Israel, invaded Egypt to retake the critical Suez Canal waterway after it was nationalised. The US blocked British access to financial assistance from the International Monetary Fund (IMF) to force the withdrawal of its troops.

More recently, Barack Obama’s 2015 Iran nuclear deal bundled sanctions relief with nuclear limits. And Trump’s predecessor, Joe Biden, coupled export controls with subsidies and tax credits to pull allies into a shared tech-security posture. As a result, Japan and the Netherlands limited the sale of semiconductor equipment to China.

The Armenia-Azerbaijan peace negotiations also began under the Biden administration. It is not hard to imagine that a similar deal, without the Trump branding, would have occurred under a Kamala Harris presidency.

Trump’s undemocratic approach

While a transactional approach isn’t unique in American foreign policy, Trump’s strategy marks a shift. Particularly in his second term, it resembles that of a typical authoritarian leader. Trump is carrying out his approach with minimal congressional or judicial constraint, with policies shaped by personal whims rather than institutional consistency.

This manifests in four key ways. First, Trump operates outside international and domestic legal frameworks. His tariff policies, for example, probably violate international and US domestic laws.

Second, Trump systematically targets democratic allies while embracing authoritarian partners. The US has had strained relationships with its allies before. But there has never been this level of animosity towards them. Trump has threatened to annexe Canada, while praising authoritarian leaders like Vladimir Putin, Xi Jinping, Viktor Orbán and Recep Tayyip Erdoğan.

Third, Trump prioritises domestic political enemies over traditional foreign adversaries. He has gutted institutions that he views as politically hostile like the United States Agency for International Development (USAid) and the State Department. He has even deployed federal forces in US cities under dubious legal reasoning.

And fourth, Trump exploits American foreign policy for personal gain in ways no previous US president has attempted. He receives more gifts from foreign governments, including a US$400 million (£295 million) Boeing 747-8 jumbo jet from Qatar. The jet was expected to serve as Air Force One during his presidency, but was transferred to Trump’s presidential library foundation.

Trump’s own company, the Trump Organization, has also signed deals to build luxury towers in Saudi Arabia, Qatar and the United Arab Emirates. And Trump’s son-in-law Jared Kushner secured US$2 billion from Saudi Arabia’s sovereign wealth fund just six months after leaving the White House. Kushner has denied the investment represented a conflict of interest.

Authoritarian approaches lead to authoritarian outcomes. Research consistently shows that authoritarian systems produce weaker alliances, underinvestment in public goods and non-credible promises.

They also decrease state capacity as professional institutions are hollowed out in favour of personal loyalty networks. Trump’s weakening of career diplomatic services and development agencies sacrifices institutional competence for direct presidential control. This undermines the very capabilities needed to implement international agreements effectively.

Trump’s style further encourages flattery over mutual interests. The naming of the Armenian transit corridor mirrors earlier examples: Poland’s 2018 proposal for a US military base named “Fort Trump”, foreign nominations for a Nobel peace prize and overt flattery at diplomatic meetings. These are all designed to sway a leader with personal praise rather than emphasising American interests.

Previous US presidents usually embedded transactional bargains within larger institutional projects such as Nato, the IMF, non-proliferation regimes or the liberal trade system. While those arrangements disproportionately benefited the US, they also produced global gains.

Trump’s deals may yield benefit. The Armenia-Azerbaijan peace agreement, for instance, could reduce the risk of conflict and unlock trade in the South Caucasus. But his approach represents a fundamentally different kind of American leadership – one that is undemocratic.

The Conversation

Patrick E. Shea 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. US presidents have always used transactional foreign policy – but Trump does it differently – https://theconversation.com/us-presidents-have-always-used-transactional-foreign-policy-but-trump-does-it-differently-262920

Cutting waiting lists for mental healthcare would save money – and people’s jobs

Source: The Conversation – UK – By Roger Prudon, Lecturer in Economics, Lancaster University

There are more than 1 million people on NHS waiting lists for mental healthcare in the UK. Many of them have to wait weeks or months before treatment can begin for conditions such as depression and anxiety.

And according to recent figures from the BBC, there are 12 times more patients waiting longer than 18 months for mental health treatment compared to those with physical conditions.

My research suggests that being on these waiting lists can have a detrimental impact not just on a person’s mental health, but also on their employment prospects and financial security.

This is because every extra month that a patient has to wait for treatment significantly increases the total amount of care they will need. And it also increases the likelihood that they will end up losing their job because of their condition.

The majority of those who lose their job after languishing on a waiting list remain unemployed for years. Many never return to work.

Among those who become unemployed, I found that approximately half end up receiving disability benefits. The other half will rely on different kinds of state benefits such as income support or depend financially on family members.

So providing speedier access to mental healthcare could have a significant economic impact, personally, and for the state. In the Netherlands where I collected my data (it’s not openly available in the UK), I calculated that a one-month reduction in average waiting time would save that country more than €300 million (£261 milllion) each year in unemployment related costs, such as benefits payments and income taxes.

For the UK, with its larger population, this would translate into an annual saving of more than £1 billion.

Recruitment savings

My calculations also show that approximately 3,000 additional full-time psychiatrists and psychologists would be needed to reduce the NHS mental healthcare waiting list by one month. With annual salaries coming to less than £300 million, this would leave £700 million to spend on recruitment and training.

The NHS knows it needs to do something about these waiting lists. Health minister Stephen Kinnock has commented: “For far too long people have been let down by the mental health system and that has led to big backlogs.”

And there is a plan to hire more mental healthcare professionals and increase training opportunities, which could substantially shorten waiting times for mental healthcare in the long run.

Door open to waiting room.
Wait and see.
Nick Beer/Shutterstock

In May 2025, the government said it would be opening specialist mental health crisis centres. Starting off with six pilots centres throughout the UK, these are meant to alleviate pressure from A&E departments and treat individuals in acute mental distress.

But while ensuring timely access to care for those with the most severe and acute mental health problems, these plans are unlikely to reduce waiting times for those waiting for non-emergency pre-planned care. Total funding for the new crisis centres is budgeted at £26 million, thereby increasing the NHS mental healthcare budget of around £18 billion by less than 0.2%.

Concerns have also been raised by the Royal College of Psychiatrists, which has stated that the new plans are unlikely to benefit the majority of patients as many of them also suffer from physical health problems. These people require fully integrated services, rather than separate mental health crisis centres.

Reducing the waiting lists for mental healthcare will not be easy and will come at a considerable financial cost. But my study shows that an economic case can be made for the increased investment.

Shorter waiting lists will speed up care and help more people to remain in work. The potential benefits, in terms of both health and economics would be substantial, helping patients, the healthcare system and society as a whole.

The Conversation

Roger Prudon receives funding from the Dutch Research Council
(NWO).

ref. Cutting waiting lists for mental healthcare would save money – and people’s jobs – https://theconversation.com/cutting-waiting-lists-for-mental-healthcare-would-save-money-and-peoples-jobs-258352

A new way of thinking about empathy could cool Britain’s migration rows

Source: The Conversation – UK – By Georgios Karyotis, Professor of Security Politics, University of Glasgow

Recent protests at asylum hotels in Epping, Essex, have prompted calls from the hotel’s residents for something rare in UK migration debates: understanding. This is something that has been clearly lacking in the conversations fuelling anti-immigrant protests, from Southport in summer 2024 to Ballymena in Northern Ireland and Essex this year.

Protesters denounce asylum seekers as “criminals”, while authorities dismiss protests as “mindless violence” and “thuggery”. These labels stick because neither side really understands the other.

Our recent study illustrates this, showing how far imagination outruns knowledge when it comes to migration. People tend to overestimate refugees’ negative feelings and underestimate their positive feelings.

We asked Britons what they thought Syrian refugees in the UK felt. But only 15% of Britons guessed that “hopeful” – not “afraid”, “desperate” or “angry” – was their most commonly reported emotion.

That mismatch between reality and perception is what researchers call an “empathy gap”: our inability to accurately recognise the emotions of people outside our own group. This gap is where fear and misinformation can take hold. But a new way of thinking about empathy could help close it.

The trouble with empathy

Empathy is often celebrated in liberal democracies as vital towards peaceful coexistence between groups, critical to democratic functioning and conflict resolution.

Evidence suggests that empathy can promote more inclusive behaviour toward refugees by making citizens more aware of refugees’ experiences. Similarly, training that emphasises the importance of empathy in police officers has been shown to reduce the risk of confrontation between protesters and officers.

Empathy research often asks people to imagine another’s feelings and then rate their own level of concern. However, self-reported empathy measures are prone to socially desirable responding and gender biases. They also assume we know what “others” feel without ever checking with them. This means that what we record as “empathy” may, in fact, be inaccurate guesswork – filtered through our own biases – rather than a genuine understanding of the other’s reality.

How can we be sure that the version of the world we see through another’s eyes is valid, if we haven’t asked the “other” in the first place how they see the world?

Instead, we propose the concept of “intersubjective empathy”. This approach is about accurately recognising how others feel, as reported by them. It is a cognitive ability, not a moral badge, necessitating that we first ask others what they feel, rather than assume it.

This boils the empathy exercise down to just two short questions: The out-group is asked: “How do you feel?” The in-group is asked separately: “How do you think the out-group feels?” Comparing these responses gives us a similarity score – our measure of empathic accuracy.

We surveyed 1,534 British citizens and 484 young Syrian refugees (aged 18-32) in 2017, shortly after the Brexit referendum and the peak of Europe’s refugee crisis.

The results showed that British citizens significantly underestimated the positive emotions refugees reported – especially happiness and hope – and overestimated their negative emotions.

Is this really a problem, you might ask? Surely it’s enough to feel that someone is going through a difficult time? But this paternalistic empathy – imagining a group as being worse off than they are – can produce negative stereotypes of the pitied group and be deeply disempowering. Accurate emotion recognition is important.

Our analysis shows that intersubjective empathy can indeed help dispel public fears over immigration. We found that people with higher levels of intersubjective empathy (greater understanding of the other group’s emotions) were not only less likely to see refugees as threatening, but also more likely to be motivated to care for them.

But empathy, even the accurate kind, has limits. At very high levels of empathic accuracy (high intersubjective empathy), support for helping refugees actually declined. Why? One possibility is that people concluded refugees were coping well and didn’t need help. Another is that high empathy triggered a sense of competition or resentment – perceiving refugee wellbeing as coming at the expense of one’s own group.

While the belief that refugees are benefiting while locals lose out does appear in the current protests, we know that this can be fuelled by misinformation, partial truths or far right ideology, not understanding. Intersubjective empathy means recognising a group’s complex and diverse realities, without reducing refugees to either helpless victims or undeserving beneficiaries.

Us v them

In a polarised society, empathy must go beyond imagining suffering and recognise people’s real experiences. That includes recognising refugees not just as victims, but as people with resilience, agency and emotional complexity. This should involve amplifying refugee voices and agency in all their diversity.

But it also means listening to those who express fear or anger about immigration, without rushing to moral judgement. Automatically branding protesters as racist or far-right thugs, without seeking to recognise their emotions, may only shift the divide from “citizens v migrants” to “good v bad citizens”.

If we want to move beyond the current (and seemingly permanent) conflicts around migration, we need tools that help reduce fear without scapegoating anyone. Intersubjective empathy is one such tool, usable in schools, policy and community work. Sometimes, the most important thing we can do isn’t feel for others, but to truly hear and understand them.

The Conversation

Georgios Karyotis was the Principal Investigator for the project ‘Building Futures: Aspirations of Syrian Youth Refugees and Host Population Responses in Lebanon, Greece & the UK’, funded jointly through the ESRC and AHRC, Forced Displacement Urgency Call, Global Challenges Research Fund, (ES/P005179/1).

Andrew McNeill and Dimitris Skleparis 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. A new way of thinking about empathy could cool Britain’s migration rows – https://theconversation.com/a-new-way-of-thinking-about-empathy-could-cool-britains-migration-rows-259490

Qu’est-ce que le « trait de côte » des cartes géographiques ?

Source: The Conversation – France (in French) – By Eric Chaumillon, Chercheur en géologie marine, La Rochelle Université

On pense bien connaître le trait de côte des cartes géographiques. Sa définition est pourtant plus complexe qu’il n’y paraît, car il ne s’agit pas d’une référence immuable au cours du temps. Le changement climatique, sans surprise, vient encore compliquer la donne.


Tout le monde pense connaître le trait de côte qui est représenté sur les cartes géographiques. Il occupe une place importante dans nos représentations et semble correspondre à une ligne de référence stable dans le temps. Nous allons voir qu’il n’en est rien.

Commençons par le définir. Selon le service hydrographique et océanographique de la Marine nationale (SHOM) et l’Institut géographique national (IGN), il s’agit de la « limite de laisse » (c’est-à-dire, jusqu’où peuvent s’accumuler les débris déposés par la mer) des plus hautes mers, dans le cas d’une marée astronomique de coefficient 120 et dans des conditions météorologiques normales (pas de vent du large et pas de dépression atmosphérique susceptible d’élever le niveau de la mer).

Il faut encore ajouter à ces conditions « pas de fortes vagues », car elles peuvent aussi faire s’élever le niveau de l’eau. De façon pragmatique toutefois, on peut se limiter aux marées hautes de vives-eaux dans des conditions météorologiques normales pour définir le trait de côte.

Les marées de grandes vives-eaux se produisant selon un cycle lunaire de 28 jours et les très grandes vives-eaux se produisant lors des équinoxes deux fois par an (en mars et en septembre).

Entre accumulation de sédiments et érosion

Le trait de côte est situé à l’interface entre l’atmosphère, l’hydrosphère (mers et océans) et la lithosphère (les roches et les sédiments), ce qui en fait un lieu extrêmement dynamique. Le trait de côte peut reculer, quand il y a une érosion des roches ou des sédiments, ou avancer, quand les sédiments s’accumulent.

Par conséquent il est nécessaire de le mesurer fréquemment. Il existe tout un arsenal de techniques, depuis l’utilisation des cartes anciennes, l’interprétation des photographies aériennes et des images satellitaires, les mesures par laser aéroporté, les mesures topographiques sur le terrain et les mesures par drones.

Les évolutions des côtes sont très variables et impliquent de nombreux mécanismes. En France, selon des estimations du CEREMA, 19 % du trait de côte est en recul.

Un indicateur très sensible aux variations du niveau de la mer

Le principal problème est que l’évolution du trait de côte est très sensible aux variations du niveau de la mer. En raison du réchauffement climatique d’origine humaine, la mer monte, du fait de la fonte des glaces continentales et de la dilation thermique des océans, et ce phénomène s’accélère.

Pour les côtes sableuses, cela conduit à une aggravation des phénomènes d’érosion déjà existants. Avec l’élévation du niveau des mers, des côtes stables, voire même des côtes en accrétion pourraient changer de régime et subir une érosion chronique. Sur un horizon de quelques décennies, il est impossible de généraliser, car la position du trait de côte dépend aussi des apports sédimentaires qui sont très variables d’une région à une autre.

Le Centre d’études et d’expertise sur les risques, l’environnement, la mobilité et l’aménagement (Cerema) estime que d’ici 2050, 5 200 logements et 1 400 locaux d’activité pourraient être affectés par le recul du trait de côte, pour un coût total de 1,2 milliard d’euros. La dynamique et le recul du trait de côte sont un sujet majeur, dont l’intérêt dépasse les seuls cercles spécialisés, avec des implications très concrètes, notamment en matière de droit de la construction. En premier lieu parce que le trait de côte est utile pour définir le domaine public maritime (DPM).

Ses limites ont été précisées en 1681 par une ordonnance de Colbert qui précise que le DPM naturel ne peut être cédé et qu’une occupation ou une utilisation prolongée par des particuliers qui se succèdent sur cette zone ne leur confère aucun droit réel ou droit de propriété.

Protéger le trait de côte sans construire des digues

La législation française relative au trait de côte a récemment évolué. En témoigne par exemple la loi Climat et résilience de 2021, qui renforce l’adaptation des territoires littoraux. La stratégie nationale de gestion intégrée du trait de côte insiste sur la mise en place de solutions durables pour préserver le littoral, tout en assurant la préservation des personnes et des biens.

Concrètement, comment faire ? L’approche la plus connue est la défense de côte en dur, souvent en béton ou en roches. Cette stratégie est chère, nécessite un entretien, elle est inesthétique et entraîne une forte dégradation, voire une disparition, des écosystèmes littoraux. Surtout, on ne pourrait généraliser cette stratégie sur les milliers de kilomètres de côtes en France et dans le monde (on parle de 500 000 km de côte).

Sans rentrer dans le détail de toutes les solutions existantes, on peut noter que la communauté scientifique qui étudie les littoraux appelle à davantage recourir aux solutions fondées sur la nature (SFN). En simplifiant, on peut dire qu’il s’agit de tirer parti des propriétés des écosystèmes sains pour protéger les personnes, tout en protégeant la biodiversité.

Ces approches ont fait leurs preuves, particulièrement en ce qui concerne les prés salés, les mangroves ou les barrières sédimentaires en général (constituées par la plage sous-marine, la plage et la dune). On peut assimiler ces écosystèmes littoraux à des « zones tampons » qui absorbent l’énergie des vagues et limitent les hauteurs d’eau tout en préservant la biodiversité et les paysages.


La série « L’envers des mots » est réalisée avec le soutien de la Délégation générale à la langue française et aux langues de France du ministère de la Culture.

The Conversation

Eric Chaumillon a reçu des financements de l’ANR et du Département de Charente-Maritime.

ref. Qu’est-ce que le « trait de côte » des cartes géographiques ? – https://theconversation.com/quest-ce-que-le-trait-de-cote-des-cartes-geographiques-261604