Hundreds of genes act differently in the brains of men and women

Source: The Conversation – Global Perspectives – By Jenny Graves, Distinguished Professor of Genetics and Vice Chancellor’s Fellow, La Trobe University

GettyImages Tek Image / Science Photo Library via Getty Images

Differences between men and women in intelligence and behaviour have been proposed and disputed for decades.

Now, a growing body of scientific evidence shows hundreds of genes act differently in the brains of biologically male or female humans. What this means isn’t yet clear, though some of the genes may be linked to sex-biased brain disorders such as Alheizmer’s and Parkinson’s diseases.

These sex differences between male and female brains are established early in development, so they may have a role in shaping brain development. And they are found not only in humans but also in other primates, implying they are ancient.

Gene activity in male and female brains

Decades of research have confirmed differences between men and women in brain structure, function and susceptibility to mental disorders.

What has been less clear is how much of this is due to genes and how much to environment.

We can measure the influence of genetics by looking directly at the activity of genes in the brains of men and women. Now that we have the full DNA sequence of the human genome, it is comparatively easy to detect activity of any or all of the roughly 20,000 genes it contains.

Genes are lengths of DNA, and to be expressed their sequence must be copied (“transcribed”) into messenger RNA molecules (mRNA), which are then translated into proteins – the molecules that actually do the work that underpins the structure and function of the body.

So by sequencing all of this RNA (called the “transcriptome”) and lining up the base sequences to the known genes, we can measure the activity of every gene in a particular tissue – even an individual cell.

When scientists compared the transcriptomes in postmortem tissue samples from hundreds of men and women in 2017, they found surprisingly different patterns of gene activity. A third of our 20,000 genes were expressed more in one sex than the other in one or several tissues.

The strongest sex differences were in the testes and other reproductive tissues, but, surprisingly, most other tissues also showed sex biases. For instance, a subsequent paper showed very different RNA profiles in muscle samples from men and women, which correspond to sex differences in muscle physiology.

A study of brain transcriptomes published earlier this year revealed 610 genes more active in male brains, and 316 more active in female brains.

What genes show sex bias in the brain?

Genes on the sex chromosomes would be expected to show different activity between men (with an X chromosome and a Y chromosome) and women (with two X chromosomes). However, most (90%) sex-biased genes lie on ordinary chromosomes, of which both males and females have two copies (one from mum, one from dad).

This means some sex-specific signal must control their activity. Sex hormones such as testosterone and oestrogen are likely candidates, and, indeed, many sex-biased genes in the brain respond to sex hormones.

How are sex differences established in the brain?

Sex differences in brain gene activity appear early in the development of the foetus, long before puberty or even the formation of testes and ovaries.

Another 2025 study examined 266 post mortem fetal brains and found more than 1,800 genes were more active in males and 1,300 in females. These sets of sex-biased genes overlapped with those seen in adult brains.

This points to direct genetic effects from genes on the sex chromosomes, rather than hormone-driven differences.

Do these differences mean male and female brains work differently?

It would be remarkable if sex differences in the activity of so many genes were not reflected in some major differences in brain function between men and women. But we don’t know to what extent, or which functions.

Some patterns are emerging. Many female-biased genes have been found to encode neuron-associated processes, whereas male-biased genes are more often related to traits such as membranes and nuclear structures.

Many genes are sex-biased only in particular sub-regions of the brain, which suggests they have a sex-specific function only in those regions.

However, differences in RNA levels don’t always produce differences in proteins. Cells can compensate to maintain protein balance, meaning that not all RNA differences have functional outcomes. Sometimes, developmental processes differ between sexes but lead to the same end result.

Brain health

Of particular interest is the finding of a relationship between sex biases and sex differences in the susceptibility to some brain disorders.

Many genes implicated in Alzheimer’s disease are female-biased, perhaps accounting for the doubled incidence of this disease in women. Studies on rodents imply that expression of the male-only SRY gene in the brain exacerbates Parkinson’s disease.

Evolution of sex differences in brain gene function

These sex-biased gene expression patterns are by no means unique to humans.
They have also been found in the brains of rats and mice as well as in monkeys.

The suites of male- and female-biased genes in monkeys overlap significantly with those of humans, implying that sex biases were established in a common ancestor 70 million years ago.

This suggests that natural selection favoured gene actions that promoted slightly different behaviours in our male and female primate ancestors – or perhaps even further back, in the ancestor of all mammals, or even all vertebrates.

In fact, sex differences in the expression of genes in the developing brain look to be ubiquitous in animals. They have been observed even in the humble nematode worm.

The Conversation

Jenny Graves receives funding from the Australian Research Council.

ref. Hundreds of genes act differently in the brains of men and women – https://theconversation.com/hundreds-of-genes-act-differently-in-the-brains-of-men-and-women-266352

Do you speak cat? Take this quiz to find out

Source: The Conversation – Global Perspectives – By Julia Henning, PhD Candidate in Feline Behaviour, School of Animal and Veterinary Science, University of Adelaide

Katelyn G/Unsplash

While often miscast as mysterious or hard to understand, cats are actually excellent communicators. In fact, in free-ranging cat colonies, physical fights are kept to a minimum through clever use of body posturing, scent exchange and vocalisations.

Cats have also adapted their communication for humans. For instance, adult cats don’t usually meow at each other. But when around people, cats meow a lot, suggesting they have adapted this vocalisation for communicating with humans.

And it’s not just the meow. Cats have a wide vocal repertoire for conveying different meanings, even for specific people. Bonded cats and humans often develop their own communication repertoires, similar to having a unique dialect.

Cats can understand human communication too. Studies show cats know their own names and the names of their companions, and can recognise human emotions, even changing their own behaviour in response.

Despite all this, humans still routinely misunderstand cats. Our new study, published in Frontiers in Ethology, shows just how little people understand the cues cats give. Try the quiz below to see how well you speak cat.

What we did

We asked 368 Australian participants to watch videos of human–cat play interactions. But not all the videos were “play” for the cat. Only half of the cats were playing, while the other half were actually showing signs they didn’t want to play, or were feeling stressed by the interaction.

After each video, participants were asked if they thought the interaction was overall positive or negative for the cat, based only on the cat’s behaviour. They were then asked how they would interact with the cat in the video they had just seen.

How well do you speak cat?

Watch the short videos below and decide: is the cat feeling positive or negative about the interaction? Remember to base your answers only on the cat’s behaviour.

What did our study find?

Results showed that participants struggled to recognise negative cues indicating discomfort or stress in cats.

For videos of cats who weren’t playing and were showing subtle negative cues (such as sudden tension in the body or avoiding touch), participants only recognised the negative cues about as well as chance (48.7%).

Even when participants watched videos of cats showing overt negative cues like hissing, biting or trying to escape, they still incorrectly categorised these as positive 25% of the time.

Recognising when a cat is stressed is only the first step. We also need to know how to respond to these cues.

Even when participants did successfully recognise negative cues, they often chose to engage with the cat in ways that would cause more stress and increase the risk of human injury, such as stroking, belly rubbing and playing with hands.

A man in a summer outfit on a street pats a friendly cat who is wearing a collar.
Cats are excellent communicators – you just need to know the signs.
Micky White/Unsplash

Stress is unhealthy

Stress can have serious consequences. Cats who experience regular or prolonged stress (including from unwanted interactions like those in the negative videos) are at higher risk of heath issues such as bladder inflamation.

They’re also more likely to develop behaviours people find problematic, such as increased aggression or urinating outside of the litter tray. In turn, these behaviours increase risk of the cat being euthanised or rehomed.

Cat stress is bad for humans, too. If a person doesn’t heed early warning signs, the cat may bite or scratch, depositing bacteria and microorganisms deep into the skin. Rapid infection follows 30%–50% of cat bites. If not treated promptly, it can lead to serious complications including sepsis, chronic health issues and even death. Cat bites and scratches can also transmit zoonotic diseases such as cat scratch disease.

A calico cat getting hugs and pats.
Cats are less stressed when they’re not having to deal with unwanted interactions.
Fuzzy Rescue/Unsplash

How to play safely with cats

Watch for early warning signs a cat isn’t enjoying themselves and stop if you notice any. By the time cues are obvious, cats are already experiencing distress.

Early warnings include turning away, dodging or blocking attempts to touch, flinching, body tension, ears back or to the side, lip/nose licking and tail thrashing, slapping or tucking.

Touch

Avoid sensitive areas such as the belly, paws or the base of the tail. Cats prefer to be touched on the head and neck.

Avoid using hands to play. It teaches cats that hands are toys, and increases the risk of accidental injury. Instead, use toys that keep your face and hands away, such as a wand toy with a long handle.

Tail

Tail movements aren’t always a negative sign – they just mean the cat is emotionally stimulated and that could be from stress or excitement. Cats also use their tails for balance. So it’s best to consider the tail in combination with the whole body and the context.

Changes in tail movements can also give important clues to the cat’s mood. Generally, the bigger the movement, the more intense the feeling. So, if the movements start to get bigger or faster during play, or if a tail goes from relaxed to swishing when you touch, that might be a sign to back off.

Ears

Cats’ ears are like antennas that swivel and adjust to pinpoint sound, but they can also give us a clue to how they are feeling. If the ears move for a moment and then return to a relaxed position, that usually means they’re listening to the world around them. If the ears remain flattened and back, that’s a sign of distress.

Vocalisations

Trilling and chirruping both suggest a playful cat, while hissing, growling and yowling all indicate stress. Purring might seem positive but may indicate a cat is stressed and trying to self soothe.

Let them be

When early warnings don’t work, cats may show overt signs such as hissing, growling, trembling, hiding and, ultimately, biting or scratching.

If you notice warning signs, give the cat plenty of space. When stressed, cats don’t like being touched or having people too close. If the cat comes back and re-initiates contact, that’s a good sign they’re comfortable, but keep watch for warning signs returning.

If you pay attention to your cat’s behaviour and give them space when they need it, with a bit of practice you might just become fluent in cat.

The Conversation

Julia Henning 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. Do you speak cat? Take this quiz to find out – https://theconversation.com/do-you-speak-cat-take-this-quiz-to-find-out-268217

Comment les enfants du baby-boom vivront-ils la fin de vie au Québec ?

Source: The Conversation – in French – By Jean-Ignace Olazabal, Responsable de programmes, Université de Montréal

Les personnes âgées de 65 ans et plus (environ 2 250 000 personnes en 2033) représenteront 25 % de la population de la province de Québec au début des années 2030, les enfants du baby-boom composant dès lors la presque totalité de la population aînée.

Le taux de mortalité augmentera cela dit progressivement à partir de 2036, avec plus de 100 000 décès par année, et dépassera de loin le nombre de naissances, maintenant le Québec dans un contexte de post-transition démographique qui pourrait provoquer un déclin de la population globale.

Quoi qu’il en soit, l’augmentation de la longévité prévue fera que ces nouveaux vieux, les enfants du baby-boom, seront plus nombreux à devenir octogénaires et nonagénaires que ceux des générations précédentes. En effet, les 80+ pourraient représenter près de 8 % de la population en 2033, alors que l’espérance de vie prévue par Statistique Canada sera de 82 ans pour les hommes et de 86 ans pour les femmes.

Il est clair que la balise 65+ n’est plus la même qu’il y a 50 ans, et que la vieillesse est désormais un cycle de vie long, avec les enjeux et défis que cela comporte. Or, paradoxe remarquable, alors que le Québec figure au palmarès des sociétés où l’espérance de vie est la plus haute, elle est également celle où la demande d’aide médicale à mourir est la plus importante.

Anthropologue de la vieillesse et du vieillissement, je suis responsable de la formation en vieillissement à la Faculté de l’apprentissage continu (FAC) de l’Université de Montréal et je m’intéresse aux aspects sociaux du vieillissement des enfants du baby-boom au Québec.


Cet article fait partie de notre série La Révolution grise. La Conversation vous propose d’analyser sous toutes ses facettes l’impact du vieillissement de l’imposante cohorte des boomers sur notre société, qu’ils transforment depuis leur venue au monde. Manières de se loger, de travailler, de consommer la culture, de s’alimenter, de voyager, de se soigner, de vivre… découvrez avec nous les bouleversements en cours, et à venir.


Des vieux nouveaux genres ?

Si le baby-boom est un phénomène démographique englobant les personnes nées entre la fin de la Seconde Guerre mondiale et le milieu des années 1960, il est convenu, ici comme en France ou aux États-Unis, de réserver le nom baby-boomers aux personnes nées entre 1946 (1943 au Québec) et 1958.

Dans son livre intitulé Le fossé des générations, publié en 1971, l’anthropologue Margaret Mead disait des baby-boomers états-uniens qu’ils constituaient une génération préfigurative, en ce sens qu’ils ont inversé les termes de la transmission intergénérationnelle, les jeunes instruisant leurs aînés et, du coup, leurs pairs, plutôt que l’inverse, défiant ainsi la tradition.

Cette inscription en faux contre les valeurs parentales et ancestrales aura permis l’essor de la contreculture dans les années 1960-1970, comme l’expliquent les sociologues Jean-François Sirinelli dans le cas de la France et Doug Owram dans celui du Canada, à travers des valeurs jeunes (la musique pop, la consommation de drogues récréatives ou l’amour libre par exemple). Elle aura également permis de rompre avec la traditionnelle transmission des rôles et des statuts au sein de la famille, comme le souligne le sociologue québécois Daniel Fournier.

Un effet de génération

On parle ici d’un effet de génération au sens sociologique du terme. Au Québec, les baby-boomers seraient, selon le sociologue québécois Jacques Hamel, ceux qui constituent cette fraction des enfants du baby-boom ayant souscrit au slogan « qui s’instruit, s’enrichit » et qui détiennent ces « diplômes universitaires, expression par excellence de cette modernisation » que connut le Québec dans les années 1960.

Ces derniers auront fomenté, sous l’égide des aînés ayant réfléchi la Révolution tranquille (soit les René Lévesque, Paul Gérin-Lajoie et autres révolutionnaires tranquilles), des transformations majeures au sein d’institutions sociales et d’idéaux aussi fondamentaux que la famille (en la réinventant), la nation (en la rêvant) ou la religion catholique (en la reniant de façon massive).

Le sociologue américain Leonard Steinhorn reconnaît dans cette génération des personnes aux valeurs progressistes ayant tendance à une plus grande reconnaissance de la diversité culturelle, des nouvelles mœurs (comme la légalisation du mariage homosexuel, de l’aide médicale à mourir, ou du cannabis récréatif), ou de l’égalité entre les hommes et les femmes, par rapport aux générations précédentes.


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Mais ce qui distingue surtout ces baby-boomers vieillissants des générations de personnes âgées d’antan, c’est la persévérance dans la conviction de la primauté du sujet, par delà les conventions sociales, même dans la dépendance et la fin de vie.

L’effet de génération, bien qu’il diffère chez chacun des membres d’un même ensemble générationnel, est un produit de l’histoire et des conditionnements sociohistoriques auxquels le sujet aura été exposé au cours des premières décennies de sa vie. Les premières générations du baby-boom ont dès leur jeune âge adulte participé activement à la laïcité de l’État et de l’espace public et privé, et souscrit à l’État technobureaucratique promu par la Révolution tranquille, libérant le sujet des attaches communautaristes pour le rendre autonome.

Les enfants du baby-boom et la fin de vie

L’affranchissement des contraintes religieuses chez les Québécois d’origine canadienne-française, le difficile accès aux soins palliatifs pour les personnes âgées et, surtout, la volonté de contrôler sa propre destinée, sont autant de facteurs qui risquent d’influer sur la fin de vie et la mort des enfants du baby-boom au Québec.

En 2023, 7 % des personnes décédées au Québec – majoritairement des personnes âgées – ont choisi la mort médicalement assistée, dans un contexte d’acceptation sociale presque unanime. En effet, 90 % de la population québécoise appuie la loi sur l’aide médicale à mourir, selon un sondage Ipsos, soit le plus haut taux au Canada.

La détresse existentielle face à la fin de vie et le refus de la souffrance et de l’agonie pourraient expliquer l’engouement des enfants du baby-boom pour ce qu’ils considèrent une mort digne.

Or le grand volume de personnes qui constituent l’ensemble des cohortes du baby-boom, soit les personnes nées entre 1943 et 1965, invite à réfléchir au sort qui sera réservé à beaucoup d’entre eux et elles quant à la qualité et à la quantité des soins et des services publics qui leur seront alloués. Étant donné le contexte plutôt critique du Réseau québécois de la santé et des services sociaux, se pose la question des conditions dans lesquelles se dérouleront ces nombreux décès, estimés à plus de 100 000 par année dès 2036.

Pas tous égaux devant la vieillesse

Certes, une bonne proportion de personnes parmi ce grand ensemble populationnel seront effectivement à l’aise financièrement et jouiront d’un bon état de santé grâce à leur niveau d’éducation, à de généreuses pensions et autres fonds de retraite, à de saines habitudes de vie, et à la biomédecine. Cela étant dit, une proportion non négligeable vieillira appauvrie et malade. Les inégalités sociales de santé demeureront importantes au sein de ces nouvelles générations de personnes âgées.

Les hommes bénéficieront globalement d’un avantage sur les femmes en termes de conditions de retraite et de qualité de vie, tout comme les natifs par rapport aux immigrants, soulignent les démographes Patrik Marier, Yves Carrière et Jonathan Purenne dans un chapitre de l’ouvrage Les vieillissements sous la loupe. Entre mythes et réalités. Cela aura une incidence sur les conditions d’habitation et de résidence, sur les coûts privés en santé et sur la qualité du vieillissement en général.

Ces inégalités sociales de santé feront que les dernières années de vie de plusieurs, des femmes surtout, risquent de l’être en mauvaise santé, appauvries et sans forcément un entourage de qualité. Mais vivre plus longtemps à n’importe quel prix n’est pas le souhait de beaucoup parmi les enfants du baby-boom, et ce indépendamment de leur statut socioéconomique.

L’aide médicale à mourir deviendra-t-elle, dès lors, un acte médical ordinaire, alors que le système public de santé et de services sociaux connaîtra une pression accrue ? Quoi qu’il en soit, ce geste médical ultime devrait toujours jouir d’une popularité incontestable parmi les nouveaux vieux Québécois, du moins ceux d’origine canadienne-française qui ont rompu avec le catholicisme, ce qui pourrait contribuer à freiner l’augmentation de l’espérance de vie au Québec.

Mais encore faut-il que la fin de vie se déroule également dans la dignité.

La Conversation Canada

Jean-Ignace Olazabal a reçu des financements du CRSHC, IRSC.

ref. Comment les enfants du baby-boom vivront-ils la fin de vie au Québec ? – https://theconversation.com/comment-les-enfants-du-baby-boom-vivront-ils-la-fin-de-vie-au-quebec-252148

England’s plans to get more young people working or studying don’t go far enough – employment expert

Source: The Conversation – UK – By Peter Urwin, Director, Centre for Employment Research, University of Westminster

PeopleImages/Shutterstock

The number of 16 to 24-year-olds in England who are not in education, employment or training (Neet) currently stands at nearly one million.

In a recent document of proposed policy, the government has set out a range of initiatives to help them. These include new qualifications designed for young people who achieve grade two or below in maths and English GCSEs, and guaranteed access to education, training or work. But will these initiatives be successful?

There are a multitude of contributing factors that lead to young people becoming Neet. These include if they have caring responsibilities, special educational needs or disabilities, and mental health challenges. Essentially, though, there are two cross-cutting challenges that must be addressed.

First, too many young people in England reach age 16 with poor qualifications, having become disillusioned with education. England’s further education system faces an enormous challenge to help them achieve results that will enhance their employment prospects.

Second, this leaves them unprepared for employment in a labour market with diminishing opportunities for young, low skilled workers.

Each August, when GCSE results are released, statistics set out what proportion of 16-year-olds achieved a “pass” – a grade four or above – in their exams. Far less attention is paid to the approximately 30,000 young people who do not achieve a grade 1, the lowest grade, in GCSE English and maths.

Most of these young people have complex special educational needs and disabilities or are severely absent from school. Many are not entered for GCSEs at all.

More generally, in research with colleagues, we estimate that there are up to 80,000 lower attaining young people each year aged 16, who for instance, achieve grade two or below in maths and English. Despite a raising of the compulsory age for education and training to 18, many students still do not engage with post-16 learning after their GCSE year.

A key new initiative from the government to address this – detailed further in the recently published independent review into curriculum and assessment – is a reconsideration of the post-16 policy that requires GCSE resits in English and maths for those who do not achieve at least grade four.

For the lowest attaining young people, the pass rate for these resists is currently very low. The proposed introduction of new post-16 qualifications in these subjects at level one, one level below GCSE (level two), for the lowest attaining is therefore encouraging.

Students in exam hall
Currently, students who do not pass maths and English GCSE are required to resit.
KOTOIMAGES/Shutterstock

More generally, there is a refreshing recognition that not all young people will achieve level three – A-levels, T-levels or equivalent qualifications – by the age of 19 and get a job at this level. This includes a suggestion that good quality vocational education pathways will now “prepare students to progress directly into level two occupations” – jobs that require skill levels equivalent to GCSE.

Unfortunately, the new 16 to 19 level one maths and English qualifications that these students will need to take, are envisaged to support them “progressing onto GCSE” in these subjects. Acceptance that many low attainers struggle to achieve this does not seem to fit with a continued drive for them to get GCSE maths and English. Many level two occupations, such as bricklaying and plastering, do not require level two maths and English, so this seems unnecessary.

The job market

The “supply” of approximately 80,000 low skilled young people to the labour market each year is a long-standing problem in the UK as they are much more likely to be Neet.

Many of the government’s proposed policies are relevant to this challenge. The main approach is to provide “guarantees”.

The “youth guarantee” promises young people “access to education, training and/or help to get into work”, including a guaranteed job for those unemployed for over 18 months. The proposed “pathways to work guarantee” will “provide training, work experience and a guaranteed job interview”. There will also be a “guaranteed college place in reserve for all 16-year olds”.

However, the government’s proposals contain little practical consideration of the capacity needed to meet these commitments. Much of the focus on job guarantees (for instance, “payments of up to £3,000 per apprentice” for employers) will simply offset recent national minimum wage and national insurance contribution increases that likely reduce young people’s job opportunities. Local authorities already have similar duties regarding post-16 education guarantees.

The government has set out an ambitious plan for change. However, the lack of practical detail on challenges such as capacity, as well as limitations to any new spending, may constrain the achievement of this ambition.

The government’s commitment to a data-driven approach that joins up skills and employment is very encouraging. Working with colleagues, I am trying to inform this data-driven approach. I would suggest that reversing unintended consequences of previous policies, can be achieved at low cost.

Reintroducing partnership approaches between schools and further education providers, for occupational programmes that spanned the ages of 14 to 18, would better engage those who have become disillusioned with education and provide education and training that prepares them for a variety of level two occupations. Sectors such as construction, health and social care, for instance, are struggling to fill roles.

Any concern over the narrowing of a young person’s learning early in their school career can be mitigated by the government’s commitments to lifelong learning, and the recent national curriculum recommendations that these learners can still progress to level three “if that is the right option”.

The Conversation

Peter Urwin has received funding from UKRI, ESRC, Acas and the Nuffield Foundation,

ref. England’s plans to get more young people working or studying don’t go far enough – employment expert – https://theconversation.com/englands-plans-to-get-more-young-people-working-or-studying-dont-go-far-enough-employment-expert-268606

US election results suggest Trump’s coalition of voters is collapsing

Source: The Conversation – UK – By Andrew Gawthorpe, Lecturer in History and International Studies, Leiden University

Americans voted in elections on November 4 in the first major test of whether Republicans can hold together the coalition of voters that propelled Donald Trump to the White House in November 2024. The result was a Democratic party triumph.

Trump was not directly on the ballot in any of these elections, the most high-profile of which were to decide who would become the mayor of New York City and the governors of Virginia and New Jersey. But each race has been seen to varying degrees as a referendum on the president and the direction he has taken his party.

American politics is highly nationalised. This means that results in local and state elections are often heavily influenced by how voters feel about the national political situation. This is often frustrating to local politicians.

In New Jersey, for example, the Republican candidate Jack Ciattarelli frequently complained that his Democratic opponent Mikie Sherrill was trying to make their recent race a referendum on the president rather than basing the campaign on the relative merits of their own proposals.

“If you get a flat tire on the way home tonight, she’s going to blame it on President Trump”, Ciattarelli said to voters at numerous campaign rallies. In the end, Sherrill won by 13%.

Republicans’ fraying coalition

None of the major races decided on November 4 were in the states usually regarded as the “swing states” – the ones that could reasonably be won either by the Democrats or Republicans and usually decide the outcome of presidential elections. But this doesn’t mean we cannot learn anything from them.

The nationalisation of US politics means that voters with similar demographic characteristics – for instance, what race they identify as or whether they live in the suburbs or rural areas – tend to vote in similar ways across state lines. If a party is improving its performance in the suburbs of New Jersey, the same is likely to be the case in the swing state of Pennsylvania.

In this respect, democratic socialist Zohran Mamdani’s victory in New York City was the least surprising news of the night. For New York to have its first Muslim mayor is a historic milestone, and Mamdani’s achievement has electrified many. But Democrats usually dominate in urban areas, and he was no exception.

Republicans will be much more worried about what happened elsewhere. In both Virginia and New Jersey, Democrats won by double-digit margins – and they did so by winning back the groups that deserted them in the 2024 presidential election.

In 2024, Republicans were thrilled to make big inroads with Hispanic voters. Many saw it as proof that their party was extending its appeal beyond the white voters who make up its core supporter base. But in the recent elections, those inroads seemed to vanish.

Sherrill, a moderate Democrat who hasn’t generated nearly as much excitement as Mamdani, made her biggest gains in Passaic and Hudson counties, two of New Jersey’s most heavily Hispanic areas. Abigail Spanberger made the same inroads in Virginia.

Suburban voters, who often prove crucial to winning presidential elections, also deserted the Republicans in large numbers. Spanberger won Virginia’s Henrico County, a swathe of the suburbs of Richmond, by 40%. This was the Democrats’ biggest margin of victory in the county ever.

Some caveats

These results are great news for Democrats, and they exceeded the expectations of most observers before election night. Taken together, they seem to suggest that the coalition that won victory for the Republicans in 2024 is collapsing.

But it’s also not time for possible 2028 Democratic presidential candidates to start measuring the White House drapes quite yet. These results reflect a recent trend in US politics in which Republicans have struggled to win so-called off year elections – ones in which the presidency is not on the ballot.

In his ten years on the political scene, Trump has transformed the Republican party by expanding its appeal among less-educated white voters, younger voters and, to some extent, voters of colour.

But these are also groups that are less likely to vote than the average American. As a result, getting them to turn out when Trump is not on the ballot is a goal that Republicans have found elusive. So, we have to be careful about the conclusions we draw from these results.

At a minimum, we can safely say that the results of the recent elections suggest Democrats can expect to perform well in the midterms in 2026. That gives them the opportunity to win back one or two houses of Congress and act as a check on Trump’s agenda.

For their part, Republicans have some soul-searching to do. Trump is constitutionally barred from seeking a third term in 2028. Unless some other Republican can reproduce Trump’s appeal to infrequent voters, the signs are that his party will struggle even in presidential election years.

Much also depends on Trump’s policies in the years to come. Voters are clearly fed up with the lack of progress on reducing the cost of living, the brutality of immigration raids, and the corruption and chaos that many perceive to exist under this administration.

Voter sentiment on these issues is unlikely to change unless Trump changes course. The question, given his political style and his personality, is whether he can – or whether he even wants to.

The Conversation

Andrew Gawthorpe 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 election results suggest Trump’s coalition of voters is collapsing – https://theconversation.com/us-election-results-suggest-trumps-coalition-of-voters-is-collapsing-268967

How Zohran Mamdani’s ‘talent for listening’ spurred him to victory in the New York mayoral election

Source: The Conversation – UK – By Daniel Hutton Ferris, Lecturer in Political Theory and Philosophy, Newcastle University

Zohran Mamdani, a 34-year-old democratic socialist, has been elected as New York City’s mayor. He became the first New York mayoral candidate to win more than 1 million votes since 1969, and looks set to secure over 50% of the total vote.

With almost all of the votes counted, independent candidate Andrew Cuomo seems to have been backed by 41.6% of voters. Republican Curtis Sliwa has secured just 7%.

Mamdani, who has become New York City’s first Muslim mayor, swept to victory on what was characterised as a radical left-wing platform. He has promised to tax millionaires more in order to fund free buses and childcare for all.

He has also vowed to honour an International Criminal Court arrest warrant for the Israeli prime minister, Benjamin Netanyahu, over alleged war crimes in Gaza if he visits New York. The Israeli foreign ministry has previously called Mamdani a “mouthpiece for Hamas propaganda”.

How did a figure on the far left of American politics, who is also a staunch critic of Israel, win in a city that is full of millionaires and home to a sizeable Jewish population?

The corruption and sexual harassment scandals affecting his main rival certainly helped, as did the focus of his campaign on making life more affordable for New Yorkers. Mamdani’s presence on social media raised his profile and attracted voters, too.

He posted slick videos on TikTok and Instagram throughout his campaign, including one where he criticised the rent increases seen under outgoing mayor Eric Adams while running the New York City marathon.

But journalists and commentators have noticed something else that has helped boost Mamdani’s appeal among New Yorkers. He has what the New York Times called in July “a rare talent for listening”.

Mamdani is unusually reflective in interviews, often thinking silently for more than 20 seconds before responding to questions. And after his successful primary earlier in 2025, Mamdani contacted every business and cultural leader in the city he could get hold of to hear about why they opposed him.

The viral campaign videos that made his name also see him walking the streets of New York, asking voters questions and listening to their answers at length without interruption. Mamdani may be a radical, but he really listens.

Talking to voters

Democratic theorists are likely to celebrate Mamdani’s approach. Many philosophers embrace what is known as the “deliberative theory of democracy”, which argues that talking – as opposed to voting – is the central democratic institution.

These people suggest that politicians should talk to a diverse range of voters respectfully about their decisions. Listening to diverse perspectives improves policy because it requires leaders to consider a range of ideas and arguments, relying less on their own gut intuitions.

As a respectful and inclusive political style, it can also help citizens feel heard and challenge the idea that politicians are interested only in power and will say whatever it takes to win. A more deliberative kind of responsiveness to voters can therefore increase political legitimacy and trust.

Political scientists are likely to point out that Mamdani has an important strategic reason for his deliberative political style. New York City uses a system of ranked choice voting, or “the alternative vote”, which asks voters to rank candidates in order of their preference rather than choosing just one.

This encourages politicians to find policy proposals that are supported by large majorities, such as taxing millionaires to pay for free childcare, and to communicate respectfully with people of all political persuasions in the hope they might win their second-preference votes.

Larry Diamond, a leading American democracy expert, has called ranked choice voting the “Archimedean lever of change” for solving the deep polarisation currently affecting US politics. This is because it penalises candidates who rely on divisive rhetoric to appeal to a passionate base of supporters.

They are unlikely to win second-preference votes from people whose first preference is for one of their rivals. Conversely, ranked choice voting rewards politicians who try to bridge political divides with respectful and inclusive campaigning.

Depolarising US politics

There are many lessons that the political left in the US and beyond can learn from Mamdani’s victory. Most obviously, it shows that a socialist and pro-Palestine candidate can win in a major US electoral contest by combining a lively digital campaign with a strong focus on the cost of living.

It also suggests that candidates perceived as being radical are more likely to succeed in elections when they are visibly willing to listen to and deliberate with voters from all sorts of backgrounds.

Mamdani’s rise should also encourage a wider embrace of ranked choice voting. The system has been used to elect members of Australia’s House of Representatives for more than a century and it is now used in the US states of Maine and Alaska, as well as in the San Francisco Bay Area.

It should be adopted elsewhere too, as an antidote to political polarisation. The UK held a referendum on changing the electoral system to the alternative vote in 2011. However, UK voters unfortunately rejected the proposal.

Finally, Mamdani’s victory shows that radicalism and reflectiveness can come together, especially when the electoral system promotes it. Ranked choice voting is so good at encouraging a politics of respect and listening that it is sometimes accused of creating boring centrist candidates.

But Mamdani has reminded us that this does not have to be the case. Reforming US election systems could encourage deliberative responsiveness and depolarise American politics, without taking radical options off the menu.

The Conversation

Daniel Hutton Ferris 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. How Zohran Mamdani’s ‘talent for listening’ spurred him to victory in the New York mayoral election – https://theconversation.com/how-zohran-mamdanis-talent-for-listening-spurred-him-to-victory-in-the-new-york-mayoral-election-268950

Lack of progress on joining EU caps another bad month for Ukraine

Source: The Conversation – UK – By Stefan Wolff, Professor of International Security, University of Birmingham

Ukraine is having a tougher-than-usual time at the moment. On the frontlines, the battle of Pokrovsk is raging, and it does not look like Ukraine is winning it.

Nor do things look good for the country’s energy resilience after months of an intensive Russian air campaign targeting key infrastructure. According to the UN, this could trigger another major humanitarian crisis in the already war-ravaged country.

The geopolitical picture looks equally grim. The delivery of long-range Tomahawk missiles, sought by Kyiv for months now, has again been ruled out by the US president, Donald Trump. What’s more, after his meeting with the Chinese president, Xi Jinping, in South Korea on October 30, Trump said that the US and China would work together to end the war in Ukraine.

The possibility of a productive collaboration between Trump and Xi on peace in Ukraine, let alone its successful conclusion, is remote. And even if there was a Washington-Beijing sponsored deal, it would not be in Ukraine’s favour as became clear a few days later.

During a high-profile, two-day visit of the Russian prime minister, Mikhail Mishustin, to China on November 3 and 4, Beijing showed no signs of backing out of its partnership with Russia, which is key to sustaining the Kremlin’s war machine.

Nor does the continuing delay in approving an EU loan to Ukraine worth €60 billion (£53 billion) and backed by frozen Russian assets bode well for Kyiv.

Given all this bad news, it was therefore no surprise that Ukraine’s president, Volodymyr Zelensky, leapt at what looked, on the surface, like good news in the European commission’s latest assessment of Kyiv’s progress towards EU membership. The European commission notes in its report that Ukraine has made progress in all of the 33 different chapters of the accession negotiations. This is as remarkable as it is commendable given that the country has done so in the shadow of Russia’s aggression since February 2022.

Yet, in many areas, progress is modest at best. A more careful analysis of the 2025 commission report suggests that positive news, if any, is in the presentation, not the underlying facts.

ISW map showing the state of the conflict in Pokrovsk, Ukraine, NOvember 4 2025.
This map of the region around the townof Pokrovsk, in Ukarine’s east, shows the extent of Russian advances.
Institute for the Study of War

For example, in relation to the fight against corruption the commission reports that recent developments “cast doubts on Ukraine’s commitment to its anti-corruption agenda”. This is primarily a reference to attempts by Zelensky’s government to limit the independence of the country’s anti-corruption institutions. The issue triggered massive public protests in the summer and forced a partial government climb-down.

Worryingly, the commission also notes “political pressure on anti-corruption activists” and “harassment and intimidation of journalists”. This includes “cases of strategic lawsuits against public participation (SLAPPs) related to journalistic investigations”.

Meanwhile, in the fight against serious and organised crime, the commission report states: “The freezing and confiscation of criminal assets remain very limited.” Other shortcomings concern limited progress on decentralisation, lack of transparency in recruitment to civil service positions, the independence and impartiality of the judiciary, and the persistence of torture and ill treatment in the prison and detention system.

On the one hand, it is not surprising that these shortcomings exist. Ukraine has been fighting an existential war for almost four years. The country has only been a candidate country for EU membership since June 2022, four months after Russia launched its full-scale invasion. Accession negotiations didn’t start until December 2023.

Yet it is the persistence of these highly visible, easily exploitable problems related to fundamental values of the EU that are causing concern. Almost identical issues were raised in the European commission’s opinion on Ukraine’s membership application in 2022. It was raised again in the 2023 report and again in last year’s progress report on accession negotiations.

It may be an exaggeration to claim that Ukraine is experiencing a turn towards a more autocratic style of presidential government under Zelensky. But there clearly are signs that war-time politics in Kyiv has a darker side that does little to bolster the country’s credentials for EU membership.

Discord within

This provides easy ammunition for Ukraine’s detractors inside the EU. Chief among them is Hungary’s prime minister, Viktor Orbán, whose obstruction tactics have frustrated European commission efforts on Ukraine’s accession.

Poland and Slovakia have joined Hungary in defying the EU’s effforts to complete an updated trade deal with Ukraine. Opposition to Ukraine from within the EU has now been further strengthened by the formation of a eurosceptic, hard-right populist government coalition in the Czech republic.

The EU’s foreign affairs chief, Kaja Kallas, continues to insist that membership for Ukraine by 2030 “is a realistic goal”.

But the EU’s enlargement commissioner, Marta Kos, is more guarded. She has noted that “future accession treaties will need to contain stronger safeguards” to “reassure our citizens in the Member States that the integrity of our Union and democratic values are ensured, also after the accession”.

In an interview with the Financial Times, she said that she did not “want to go down as the commissioner bringing in the Trojan horses”.

Given the detail in Ukraine’s 2025 progress report on areas where Kyiv clearly needs to make urgent improvements, this suggests that the tough times for Ukraine are likely to continue, and not just in its war with Russia.

Though the future of the EU and Ukraine have become ever more closely entwined since February 2022, there remains a bigger question for the EU. Its dilemma is how to balance holding the line on its membership standards and enabling Ukraine to hold the line against Russia.

The Conversation

Stefan Wolff is a past recipient of grant funding from the Natural Environment Research Council of the UK, the United States Institute of Peace, the Economic and Social Research Council of the UK, the British Academy, the NATO Science for Peace Programme, the EU Framework Programmes 6 and 7 and Horizon 2020, as well as the EU’s Jean Monnet Programme. He is a Trustee and Honorary Treasurer of the Political Studies Association of the UK and a Senior Research Fellow at the Foreign Policy Centre in London.

Tetyana Malyarenko receives funding from Elliott School of International Affairs, The George Washington University.

ref. Lack of progress on joining EU caps another bad month for Ukraine – https://theconversation.com/lack-of-progress-on-joining-eu-caps-another-bad-month-for-ukraine-268921

What if the path to ending fossil fuels looked like the fight to end slavery?

Source: The Conversation – UK – By Rob Lawlor, Lecturer in Applied Ethics, University of Leeds

When Britain abolished slavery in its empire in 1833, it paid the equivalent of hundreds of billions today in compensation – not to the enslaved, but to the slave owners. It was an imperfect, morally uneasy compromise, but it helped achieve a historic transition that had seemed impossible.

Today, as the world struggles to phase out fossil fuels, many doubt
such a transformation is still possible. Emissions keep rising, the Paris agreement isn’t properly enforced and powerful corporations continue to mislead the public and lobby against meaningful change.

Yet slavery was once seen as immovable. It was an institution that was accepted for thousands of years – far longer than fossil fuel-powered capitalism. Slavery was a significant source of wealth for many, and the rich and powerful opposed abolition. Yet it was abolished.

As a thought experiment, let us imagine a future where effective climate action unfolds the way slavery abolition once did. What might that look like?

Leadership and ‘persuasion’

Future historians might not point to a single moment of global unity, with all nations coming together to act as one. Rather, they’ll point to one nation – or a coalition – that took the lead. These early leaders might combine diplomacy, bribery and perhaps even the threat of military force or economic sanctions to “persuade” other countries to follow suit.

That’s how Britain pushed for the end of the slave trade: with a mix of idealism and hard power, with naval patrols and trade sanctions. A global fossil fuel phase out may unfold in a similarly non-ideal way.

Bottom-up pressure, top-down resistance

In this thought experiment, change will not start with governments. Rather, the demand for action will come from the bottom up. Activists will demand change and there will be huge public support but, at the same time, the rich and the powerful will continue to defend the status quo, lobbying against the introduction of stricter legislation.

The slavery abolition movement followed that pattern, with broad public support yet fierce opposition from those with most to lose. In Britain, slave owners were even compensated with £20 million (equivalent to “40% of state expenditure in 1834”) to secure their agreement to the loss of “their” property.

Something similar could happen in the climate fight. Perhaps fossil fuel companies will one day receive financial compensation to ease the transition away from fossil fuels – not because it is deserved, but rather as a pragmatic compromise.

The law as a tool for change

Legal action would also play a pivotal role. Governments and corporations will be (and, indeed, are already being) taken to court.

Abolitionists used the law in much the same way. A good example is a famous case in which enslaved Africans revolted and seized control of the ship La Amistad. The Africans were ultimately freed after reformers highlighted the contradiction between the idea of natural rights for all humankind in the US Declaration of Independence, and laws that allowed people to be private property.

As the historian David Brion Davis noted: “It was this contradiction that helped the reformers to pass laws for very gradual slave emancipation.” The Paris agreement, often dismissed as toothless, could gain real power through litigation in a similar way.

Why this thought experiment matters

Of course, this is not a real prediction. It is a thought experiment. Imagining that climate action will mirror the history of the abolition of slavery doesn’t guarantee that this is what will happen. But the comparison is valuable for several reasons.

It shows that historical precedent matters. Looking at what worked in the past can help us imagine what might work now. Massive moral change really has happened before, even despite entrenched interests working against it. As such, the example of the abolition of slavery offers hope.

It’s also realistic. Global cooperation would be ideal, but history suggests that change will be messier, potentially with some unpalatable compromise or confrontation.

The comparison poses some hard ethical questions. Is it ever justifiable to compensate fossil fuel companies? What forms of international pressure are morally acceptable?

The thought experiment can also sharpen our strategy. If this imagined future is unpalatable – if we’re ultimately not willing to send hundreds of billions to BP, Exxon and co – then it may motivate people to work for better solutions.

Perhaps most importantly, comparing slavery with climate change shows us that individual action still matters. You may feel powerless and want to know what you can do now. The history we have looked at suggests two things: support climate action publicly and, if you can afford it, provide financial support to groups like environmental law charity ClientEarth.

Abolishing slavery was messy and the strategy taken left many uneasy. Perhaps, when the time comes, significant action to mitigate climate change will involve similar controversies. But flawed solutions may be better than none.


The Conversation

Rob Lawlor received funding from the Arts and Humanities Research Council. This funded a project and a number of events that allowed me to collaborate with researchers from other disciplines, including historians.

ref. What if the path to ending fossil fuels looked like the fight to end slavery? – https://theconversation.com/what-if-the-path-to-ending-fossil-fuels-looked-like-the-fight-to-end-slavery-268162

Rural Devon cuisine has a rich history – from the origins of cream teas to squab pie

Source: The Conversation – UK – By Paul Cleave, Lecturer, Social and Political Sciences, Philosophy, and Anthropology, University of Exeter

A postcard showing farm labourers gathering for a traditional harvest tea. Author’s collection

Growing up in rural Devon, I was introduced to its more remote villages, farmsteads and communities as a boy. In later life, I became interested in the food traditions of these places – finding out what was eaten, and how it was prepared and cooked. This became an important aspect of my research on the evolving relationship between food and tourism in Devon.

The food eaten in rural Devon up to the 1960s might appear frugal to us today, but it comprised of wholesome simple dishes. For example, Devonshire dumplings – apples wrapped in pastry and baked – were especially good when accompanied by a generous dollop of clotted cream.

Food was typically seasonal and sustaining, and fuelled hard work – especially through cold and often wet winters when a freshly baked “teddy cake”, prepared from mashed potatoes, flour, sugar, suet and dried fruit, made a welcome appearance at teatime.

I heard stories from family and friends of special food for Sundays – usually a roast dinner. And at teatime, perhaps something special like a “frawsy of junket” (milk set with rennet) or “thunder and lightning” – bread generously spread with clotted cream and anointed with treacle.

A black and white postcard showing Devonshire dumplings and cream.
A postcard showing Devonshire dumplings and cream.
Author’s collection

Before the introduction of coal- or wood-fired kitchen ranges and oil stoves, much cooking in Devon was done over an open hearth, with the bread oven fired up once a week for baking day.

Without refrigeration and mains water, preparing meals, baking and making clotted cream and butter was hard work. Clotted cream was a three-day process – milk was allowed to stand overnight in a cool dairy, then gently heated to form the thick crust of the cream the next day, which was carefully removed on day three.

Devonshire food and tourism

Devon’s farmhouse kitchens and food featured on postcards taken by enterprising early 20th-century photographers. With their humorous captions in Devonshire dialect, postcards were popular with visitors and now provide a visual record of what was eaten.

As transport by rail and road improved in the 19th and 20th centuries, more tourists were able to discover Devon’s resorts, moorland and countryside – as well as its food.

The John Keats poem Teignmouth, written in 1818, tells of how “you may have your cream all spread upon barley bread”. Devonshire teas evolved to become the now-ubiquitous cream tea, but its origins were the staple food stuffs of “splits”, sometimes known as Chudleighs – small buns made from a yeast dough, eaten with clotted cream and jam or honey.

Cream being heated on a fireplace
A postcard shows the making of ‘real Devonshire cream’.
Author’s collection

The British author Douglas St Leger Gordon, writing in the 1950s, lamented the decline of Devon’s harvest teas, which involved rural rituals and ceremony. Traditionally, the farmer’s wife and daughters would host a feast for all who had helped with the harvest, usually comprising ham sandwiches, homemade cake, splits spread with cream and jam, and specially baked harvest buns – “all of which appeared as if by magic”. The food and tea was carried in baskets to the hay-field, and the sharing of labour was rewarded with farmhouse hospitality.

Devon’s larder of fine food was known out of the county, too. Devonshire butter was sold in Fortnum & Mason in London from the 18th century, and during the 1920s The Devonshire Dairy on Oxford Street traded butter and cream.

The word spread through cookery and travel books, too. In Alec Adair’s recipe book Dinners Long and Short (1928), salt cod fried for breakfast, apple-in-and-out (a baked pudding made with apples, suet, sugar and flour) and Devonshire fried potatoes appear alongside classic French cuisine.

Clovelly herrings, or “silver darlings”, feature in Murray’s Handbook for Travellers in Devon and Cornwall (1859), which recommended visitors should stay in the cliffside village to “regale at breakfast on herrings which have been captured overnight”, and are at their best in autumn.

Some of the more intriguing Devon recipes, alas, were not recorded for posterity. We can only imagine the dish that in his journals, Reverend John Skinner called the “squab pie”. It was “four feet in circumference … composed of neck of mutton, apples and onions, and by no means a bad thing”.

Devon’s food tells an evolving story of tradition, and a culinary and cultural relationship with landscape, communities and seasons. It is a celebration of regional food heritage and history – a legacy I hope, through my research on Devonshire food and cookery, to share with future generations.


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The Conversation

Paul Cleave 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. Rural Devon cuisine has a rich history – from the origins of cream teas to squab pie – https://theconversation.com/rural-devon-cuisine-has-a-rich-history-from-the-origins-of-cream-teas-to-squab-pie-266511

How to cook the perfect pasta – we used particle accelerators and reactors to discover the key

Source: The Conversation – UK – By Andrea Scotti, Senior lecturer of Physical Chemistry, Lund University

Whether you prefer your spaghetti al dente or soothingly soft, it can be difficult to achieve perfection at home. Many of us will have experienced our pasta disintegrating into a beige mush – particularly for gluten-free alternatives.

So how much water and salt do you really need, and how long do you cook it for if you want optimal results? What’s more, how should you amend your cooking process when using gluten-free pasta? A recent study my colleagues and I conducted, published in Food Hydrocolloids, has provided answers by unveiling the physics behind the cooking process.

Turning to the Diamond light source, the UK’s national synchrotron (a circular particle accelerator) facility, we studied the scattering of X-rays off pasta (at low angles) to uncover its internal structure. Then we went to Isis and to the Institute Laue Langevin, which are neutron facilities in the UK and France, and used neutrons (which make up the atomic nucleus along with protons) to shed light on the microstructure of regular and gluten-free spaghetti under different cooking conditions.

The study shows how the hidden structure of pasta changes as it cooks, and why gluten-free versions behave so differently.

The setup enabled us to investigate the structure of starches and gluten within spaghetti on small scales that spanned from tens of times the radius of an atom to thousands of times. In this way, we could compare the transformation that happens in regular and gluten-free pasta while they are cooked in different conditions, such as being cooked for too long or cooked without salt.

Our experiments allowed us to “see” different components of the pasta separately. By mixing normal and “heavy water” (which contains an isotope called deuterium), we could make either the gluten or the starch invisible to the neutron beam. In this way, we could effectively isolate each structure in turn, and understand the effects of starches and gluten during cooking.

The power of gluten and salt

Our study reveals that, in regular pasta, the gluten acts as a strong scaffold that holds starch granules in place even during boiling, giving the pasta its firmness and slow digestion rate. In gluten-free pasta, the starch granules swell and collapse more easily – explaining the mushy texture and faster breakdown experienced when this kind of pasta is cooked in non-optimal conditions.

We also probed the effect of salt in the cooking water on the pasta structure. What we found is that salt doesn’t just make pasta taste better; it also strongly affects the microstructure of the spaghetti. When regular pasta is boiled in salted water, the gluten maintains its structure, and the starch granules are less deteriorated by the cooking process.

So how much salt should you add to preserve the pasta’s microscopic structure? Our study revealed that the optimal salt level is seven grams per litre of water, with more water required for larger amounts of pasta. The pasta should be cooked ten or 11 minutes in the case of regular and gluten-free altertnative, respectively. In contrast, when the salt concentration was doubled, the internal order broke down more rapidly and the structure within the starches granules was significantly altered by the cooking process.

Spaghetti is taken out of the pan with tongs.
The ideal amount of salt is 7 grams per litre.
Kalashnikov Dmitrii/Shutterstock

In gluten-free pasta, the story was different again due to the lack of protection of gluten. Even small amounts of salt couldn’t compensate for the absence of gluten. Artificial compounds of processed starches, used by companies to substitute the gluten, degraded fast. The most extreme example of this degradation occurred when the gluten-free spaghetti was cooked too long, for instance, for 13 instead of 11 minutes, and in very salty water.

The main finding was therefore that gluten-free pasta is structurally more fragile and less tolerant of being cooked both for too long and with the wrong amount of salt.

Improving gluten-free alternatives

Understanding pasta’s structure on these very small scales, that are invisible even under a microscope, will help the design of better gluten-free foods. In particular, the hope is to obtain gluten-free alternative that are more resilient to bad cooking conditions and are more similar in texture to regular spaghetti.

Regular wheat pasta has a low glycaemic index because the gluten slows how starch granules are broken down during digestion. Gluten-free pasta, made from rice and corn flour, often lacks this structure, meaning sugars may be released faster. With neutron scattering, food scientists can now identify which ingredients and cooking conditions best recreate gluten’s structure.

This is also a story about how cutting-edge experimental tools, mainly used for fundamental research, are transforming food research. Neutron scattering played a fundamental role in advancing our understanding of magnetic materials, batteries, polymers and proteins. Now it is also helping us to explain how everyday foods behave at the microscopic level.

The Conversation

Andrea Scotti receives funding from the Knut and Alice Wallenberg Foundation, and the Swedish Research Council.

ref. How to cook the perfect pasta – we used particle accelerators and reactors to discover the key – https://theconversation.com/how-to-cook-the-perfect-pasta-we-used-particle-accelerators-and-reactors-to-discover-the-key-268416