How natural hydrogen, hiding deep in the Earth, could serve as a new energy source

Source: The Conversation – USA (2) – By Promise Longe, Ph.D. Candidate in Chemical and Petroleum Engineering, University of Kansas

A drilling site in northeastern France is part of an effort to measure and collect natural hydrogen. Jean-Christophe Verhaegen/AFP via Getty Images

In the search for more, new and cleaner sources of energy, a largely untapped resource is emerging: natural hydrogen.

Unlike hydrogen produced from industrial processes, natural hydrogen forms through geological reactions that occur normally within the Earth’s crust, meaning it costs nothing to make – though it costs some amount to extract – and does not emit any carbon dioxide or other human‑caused pollutants.

Today, hydrogen is used mainly in oil refining, production of ammonia for fertilizer and to make methanol, which can be a fuel and an ingredient in plastics. Emerging technologies are making hydrogen a viable fuel for cars, planes, ships and factories. Hydrogen demand around the world is projected to grow from around 90 million metric tons in 2022 to more than 500 million metric tons by 2050. Some of that supply could come from nature itself, as well.

To describe each source of hydrogen, energy researchers like me, and the energy industry as a whole, use a range of colors. In general, “gray” and “blue” hydrogen are made by burning fossil fuels, with blue hydrogen incorporating technology that captures the carbon dioxide produced in the process to reduce emissions. “Green” hydrogen comes from renewable‑energy‑powered electrolysis, using electricity to split water into hydrogen and oxygen. “White” or “gold” hydrogen occurs naturally underground and can be extracted directly with minimal processing.

How natural hydrogen forms

Natural hydrogen originates from several geological processes. The most well‑studied mechanism is serpentinization, a reaction where water interacts with iron‑rich rocks known as ultramafics, releasing hydrogen gas.

Serpentinization occurs in diverse settings around the world, including ocean ridges and continental formations such as the Midcontinent Rift in North America, a band of mostly igneous rocks with some sedimentary rocks mixed in, which extends from Minnesota through the Lake Superior region and southward toward Kansas.

Another process, thermogenic hydrogen formation, occurs in deep sedimentary basins when organic material decomposes under high temperatures, roughly 480 to 930 degrees Fahrenheit (250 to 500 degrees Celsius). These reactions can also produce hydrogen alongside other gases, such as methane or nitrogen.

Because these processes happen over millions of years, using natural hydrogen generally requires far less energy than human‑made methods such as electrolysis, which consumes roughly 50 kilowatt-hours of electricity per kilogram of hydrogen produced – enough to power an average home for a day or two, and more than the energy that kilogram of hydrogen can provide. Natural hydrogen is already made – it just has to be collected.

The science and the search

Researchers and exploration companies are developing methods similar to those used in oil and gas exploration to locate potential hydrogen accumulations. They are looking at three types of geological formations:

  1. Focused seepage, where hydrogen seeps naturally through cracks and faults. It tends to reach the surface and disperse quickly, making large-scale capture difficult.

  2. Coal beds, where hydrogen binds to coal layers, offer higher potential density but pose difficulties for extraction. The hydrogen must first be separated from the coal and then flow through tight rock layers to the extraction point.

  3. Reservoir‑trap‑seal systems, comparable to the rock formations that trap natural gas underground, are considered the most promising for commercial production because they can concentrate large volumes of hydrogen in well‑defined, drillable structures. However, they remain largely unproven in practice: The basic idea is well established, and geologists have a good sense of where those formations might occur, but they still lack detailed data on how much hydrogen these formations actually contain and how easy it would be to extract.

A large drill rig sits on open ground.
A drill site in eastern Kansas is one of several places companies are looking for natural hydrogen.
HyTerra

Massive reserves – somewhere

The U.S. Geological Survey estimates there could be more than 5 trillion metric tons of geological hydrogen underground around the world. But only a small fraction of that is estimated to be recoverable, both technically and in terms of reasonable costs.

However, even 2% of that total would be more than all proven natural gas reserves on the planetand enough to meet projected demand for the next 200 years, even accounting for increased consumption.

All of that reserve has built up over billions of years. The Earth naturally produces between 15 million and 31 million metric tons of natural hydrogen each year – less than 1% of the amount expected to be needed each year by 2050. But only a fraction of that is likely to be efficiently captured.

So geologic hydrogen is likely best viewed as a very large but ultimately finite source of low‑carbon energy that can substantially complement, but not replace, other energy sources, including various methods of producing hydrogen.

Global hot spots

Currently, only one hydrogen field, at Mali’s Bourakébougou village, produces natural hydrogen commercially, supplying tens of tons of hydrogen per year to power the village.

However, the number of companies exploring for natural hydrogen has increased rapidly, from roughly 10 in 2020 to about 40 by the end of 2023, according to Rystad Energy and related government and research‑lab reports.

Apart from that one field in Mali, exploration is concentrated in the United States, Australia, Canada and several European countries.

In the U.S., HyTerra’s Nemaha Project in Kansas has confirmed subsurface hydrogen concentrations reaching more than 90% hydrogen and 3% helium. The higher the concentration of hydrogen, the more efficient and cost‑effective it is to recover. HyTerra is also exploring elsewhere in the Midwest and Rocky Mountain regions.

A close-up image of a rock that is mottled in shades of green and gray.
The geologic process of forming serpentinite can produce hydrogen.
James St. John via Flickr, CC BY

Technical barriers

Transforming geological hydrogen into a commercial energy source presents tough scientific and technical challenges. Detecting and measuring hydrogen underground is difficult because of its small molecular size and reactivity with other elements in the rocks.

And if what’s found is low concentrations of hydrogen mixed with large amounts of other gases, it can be costly, even prohibitively so, to separate and purify the hydrogen before it can be used.

Economics and efficiency

The economic promise of natural hydrogen lies in its simplicity.

Because geological processes already performed the production work, early estimates suggest that extraction costs could be one‑tenth the production costs for other traditional hydrogen generation techniques – or possibly even less than that.

But those figures are based on the small amounts of hydrogen found so far and may not represent future large‑scale performance. Producing enough to serve commercial demand will require discovering large, high-quality accumulations.

As one leading research group noted, “This is not a gold rush.” It’s a careful exploration for scientific evidence that could lead, in time, to an abundant, carbon‑free and continuous energy source that complements other renewable energy sources.

The Conversation

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

ref. How natural hydrogen, hiding deep in the Earth, could serve as a new energy source – https://theconversation.com/how-natural-hydrogen-hiding-deep-in-the-earth-could-serve-as-a-new-energy-source-273174

How to prevent elections from being stolen − lessons from around the world for the US

Source: The Conversation – USA – By Shelley Inglis, Senior Visiting Scholar with the Center for the Study of Genocide and Human Rights, Rutgers University

Research has found that voter fraud is rare in the United States. AP Photo/Bryon Houlgrave

President Donald Trump in his State of the Union address on Feb. 24, 2026, doubled down on his false claims that the U.S. elections system is compromised. He asserted that “the cheating is rampant in our elections. It’s rampant.”

These pronouncements follow the January 2026 FBI seizure of 2020 ballots from Fulton County, Georgia, and the president’s recent call for the Republican Party to nationalize elections. The Trump administration is also suing 24 states and Washington, D.C., for voter lists to monitor voter registrations.

In his speech, Trump asked Republicans to pass the SAVE America Act. Approved by the House on Feb. 11, 2026, the measure would require that voters provide documentary proof of U.S. citizenship, effectively ending all online voter registration. “They want to cheat. They have cheated,” he said of Democrats.

These calls spread distrust in the U.S. electoral process, despite extensive evidence showing that voter fraud is rare, especially by noncitizens.

All this has led to speculation about how much further the Trump administration and Republican Party might go to tilt the 2026 midterm and 2028 presidential elections in their favor.

After decades of working internationally on democracy and peace-building, I know that efforts to undermine elections are not uncommon. Citizens of many affected countries have learned various techniques to help protect the integrity of their elections and democracy that may be helpful to Americans today.

International electoral assistance

Leaders, even in established democracies such as India, have used increasingly sophisticated and wide-ranging means to manipulate elections in their favor. Those means vary from legal changes that suppress votes to harassment and prosecution of the opposition, to promoting widespread disinformation campaigns.

These methods have evolved despite international efforts to counter rigged elections and improve election integrity. These countering efforts are called electoral assistance, and they support societies to develop electoral systems that reflect the will of the people and adhere to democratic principles.

Electoral assistance has been shown to strengthen transparency and election administration in countries such as Armenia and Mexico. It has also improved voter registration and education in countries such as Ghana and Colombia.

It’s mostly provided by international nonprofits, such as the National Democratic Institute and The Carter Center in the U.S. Multilateral organizations such as the United Nations also provide electoral assistance.

a group of men and women in formal wear stand around a podium that says ‘only americans should vote in american elections’
House Majority Leader Steve Scalise, R-La., speaks to reporters about the SAVE America Act alongside Republican leadership and supporters on Capitol Hill in Washington, D.C., on Feb. 11, 2026.
AP Photo/Tom Brenner

Five international responses to electoral manipulation

Here are five areas of electoral assistance that have shown some success internationally.

Early warning and community resilience: Early warning efforts track threats of violence and intimidation against election officials, candidates and voters. They seek to mitigate risks and prepare for crises. This happens from the early stages of an election through election day in countries such as Sri Lanka and Liberia.

Law enforcement, civic groups and election officials usually undertake these efforts together. But where such direct cooperation with government authorities is not feasible, civic groups can help by undertaking risk assessments and tracking coercion and threats. They can also raise alarms with officials and the media.

Indicators, or established metrics, can track sophisticated coercion tactics such as the misuse of government funds for campaign purposes. They also can track vote buying, like civic groups in North Macedonia did during 2024 parliamentary and 2025 local elections.

For these efforts to be successful, it’s critical that networks of trusted leaders urge early action to put in place greater safeguards long before election day. Raising alarms and urging action was done successfully by religious leaders in Kenya during general elections in 2022.

Real-time disinformation and local media reaction: Real-time fact-checking and debunking of false or manipulative information has proven critical to election integrity in countries such as Mexico and South Africa.

A highly organized and fast-moving approach involving media, technology companies and authorities successfully countered disinformation to ensure a competitive democratic election in Brazil in 2022. A coalition of Brazilian media outlets, for example, fact-checked political claims and viral rumors during the election period, using innovative tools such as online apps.

Robust local media play a particularly important role. In the 2024 presidential election of Maia Sandu in Moldova, a new investigative newspaper uncovered a Russia-backed network that paid people to attend anti-Sandu rallies and to vote against the president. That outlet had received training by an expert nonprofit group. It also received free legal advice and human resource management that were critical to its effectiveness.

Neutrality, transparency and systems reform: Amid efforts to sow doubt in elections, increasing transparency and ethical standards can help build awareness and deepen trust.

Various tools, such as codes of conduct that detail ethical standards, can be formulated for candidates, media and businesses. This has been done in Nigeria and the Philippines.

International groups, including the the International Foundation for Electoral Systems, published model commitments for advancing genuine and credible elections in 2024, which have been used for preelection assessments in Bangladesh.

Additionally, major technology companies such as Google and Meta in 2024 helped draft the international Voluntary Election Guidelines for Technology Companies. Meta also helped target false content and deepfakes during Australia’s 2025 election.

The neutrality of election officials is critical to tackle distrust. In New Zealand, high levels of public trust in elections align with robust neutrality rules for public officials. The key is to develop public awareness of such commitments and how they can be useful to hold election officials, media and businesses accountable.

More profoundly, the design of the electoral system can also be linked to levels of public trust and polarization. New Zealand, South Africa and Northern Ireland, for example, reformed from winner-take-all elections to proportional representation elections to address deep internal divisions and dissatisfaction with unrepresentative results.

Broad-based mobilization and civic campaigns: Significant voter turnout that delivers large winning margins make efforts to manipulate results more difficult.

In Zambia, for example, a landslide victory for the opposition candidate in the 2021 presidential elections was driven by high youth turnout and people switching parties in urban areas.

Mobilization efforts can span from public campaigns to digital tools and voter registration and education. These efforts can motivate key groups, such as youth, minority or overseas voters. Participation of diaspora groups in Poland’s 2023 parliamentary elections was a key factor in the opposition’s win.

Proactively building public awareness of election security measures, called prebunking campaigns, has demonstrated results in increasing trust in elections in Brazil and the U.S. Additionally, civic education has shown to have positive impact on voter choice of pro-democracy candidates over their preferred party.

Strategic coalitions and nonpartisan monitoring: Nonpartisan monitoring and observation of an electoral process is a key tool in the electoral assistance tool kit. Effective monitoring often involves coalitions of nonpartisan civic groups, which Senegal has used, and faith-based organizations, as in the Philippines, to ensure adequate coverage of polling stations and consistent application of standards.

Key tools, such as parallel vote tabulation, or “quick counts,” which provide independent and statistically accurate reports on the quality of voting and counting process, have helped verify official election results in Ukraine, Ghana and Paraguay.

International observation by entities such as the Organization for Security and Cooperation in Europe assesses whether elections meet global standards. Where it identifies serious flaws or fraud, such scrutiny can help justify mass protests or mobilization, such as in Serbia’s parliamentary and local elections in 2023, trigger new elections, such as in Bolivia’s general elections in 2019, or support international condemnation, such as in Georgia’s 2024 parliamentary elections. They also make recommendations on reforms, such as changes to elections laws and systems, to strengthen integrity and align with democratic principles.

The Conversation

From May 2023 until July 1, 2025, the author served in the Bureau for Democracy, Human Rights, and Governance at the United States Agency for International Development (U.S.A.I.D.).

ref. How to prevent elections from being stolen − lessons from around the world for the US – https://theconversation.com/how-to-prevent-elections-from-being-stolen-lessons-from-around-the-world-for-the-us-275390

We need to talk about how Black women educators experience burnout and care

Source: The Conversation – Canada – By Nadia Clarke Cordick, PhD Student, Educational Studies, Lakehead University

When I began teaching, I was the only Black educator on staff at my Ontario school.

In addition to my official responsibilities, I was often called on to translate cultural dynamics, support students experiencing racism and provide emotional labour for colleagues — for instance by serving as a shoulder to cry on.

As research related to Ontario and elsewhere in Canada shows, both these situations — of finding myself the sole Black educator on a staff, and being expected to provide emotional labour — are common for Black teachers.

No one named the cultural translation and emotional labour tasks, they were simply expected. While professional development days offered “wellness” sessions on mindfulness and stress reduction, they never addressed the racialized stress I was experiencing or named a systemic problem to be solved.

While often well-intentioned, as researchers across sectors have examined, “wellness” focused on individual responsibility can often be interpreted as asking individuals to cope better, rather than asking institutions, cultures or social structures to change.

Now, in my doctoral studies, I am developing a research plan to conduct a qualitative study with Black women educators in Ontario, where I explore how they experience burnout and care in predominantly white school systems — and how they re-imagine those systems as places of dignity, rest and belonging.




Read more:
Being the ‘only one’ at work and the decades long fight against anti-Black racism


Wellness focused on the individual

Teacher wellness strategies comprise things like short-term initiatives and professional development focused on stress management. These may be offered by school boards, teacher unions or third-party organizations.

Approaches to teacher wellness often ignore deeper contexts, including around racialized and gendered inequities: for example, that Black women educators face disproportionate stress due to systemic racism, isolation and exploitative emotional labour.

Research shows that generic self-care programming fails to acknowledge how race and gender shape the experience of burnout in education. Without addressing institutional conditions, these “solutions” become bandages on a structural wound.

The weight Black women carry in schools

Black women are often positioned as caretakers, expected to support students, serve on equity committees and manage diversity work, all while navigating workplace bias and surveillance. These added burdens are rarely acknowledged or compensated.

A 2023 doctoral dissertation called this out directly: “wellness” for Black women educators often becomes a form of resistance, not just recovery, in the face of institutional neglect. Emotional exhaustion is not a personal failure, but a predictable outcome of systems that extract care without offering care in return.

Many Black women educators also report experiencing “racial battle fatigue,” a term describing the cumulative toll of daily microaggressions, stereotype threats and constant self-monitoring in predominantly white environments.




Read more:
Addressing anti-Black racism is key to improving well-being of Black Canadians


In exploratory conversations conducted as part of developing my research,
I am hearing that Black women educators are experiencing harm in the very systems that claim to support their well-being — that we are being asked to survive conditions that need to change. One educator in Durham Region shared the following:

“In 2011 and again in 2019, I had white colleagues reach out and touch my hair, one of them during an introduction by my administrator. I had to tell them it made me uncomfortable, and that conversation was hard. But it’s the kind of emotional labour we carry, quietly.”

During the COVID-19 pandemic, emotional labour became even more visible. The same educator recalled that after George Floyd’s murder:

“Our admin opened a staff meeting by asking how we were feeling. There was no prep. No follow-up. It felt like emotional voyeurism. What were they offering in return for that vulnerability?”




Read more:
How to deal with the pain of racism — and become a better advocate: Don’t Call Me Resilient EP 2


Afrofuturism offers a liberatory framework

To truly support Black women educators, we need frameworks that centre justice, imagination and collective care, not just resilience.

One such approach is Afrofuturism: a Black radical tradition that blends memory, imagination and the envisioning of liberated futures and new worlds beyond racial violence.

In educational contexts, Afrofuturism has been used to disrupt deficit narratives and imagine liberatory possibilities for Black learners and educators alike.

Informed by Afrofuturist and Black feminist thought, my emerging research identifies four recurring principles that reframe well-being as political, collective and embodied:

  • Speculative imagination: Dreaming of educational spaces that don’t yet exist.

  • Embodiment: Honouring the body as a site of knowledge and resistance.

  • Fugitivity: Refusing harmful systems and finding joy outside their boundaries.

  • World-making: Creating new models of care, rest and belonging.

‘Affinity spaces’

These Afrofuturist and Black feminist principles partly emerged in practice during my earlier research in social justice studies, when I collaborated with Hill Run Club, a Toronto-based Black women’s running and wellness collective.

Working alongside 12 Black women over the course of a year, I engaged as both a researcher and a run coach through movement, reflective journaling and vision boarding. This community-rooted project was co-created with participants and explored how Black women experience wellness, safety, body politics and belonging in predominantly white fitness spaces.

This work countered dominant wellness narratives by engaging in speculative reimagining and centring community-rooted care as acts of resistance.
It also laid the methodological and theoretical foundation for my current research.

In a narrative interview, Aaries Clarke Cordick, a teacher candidate in Ontario, shared what Afrofuturist wellness means to her:

“Affinity spaces make a difference. Being around colleagues with similar philosophies of inclusion, or even just seeing teachers who reflect the diversity of our students matters. We need PD [professional development] that speaks directly to racial battle fatigue and burnout, especially for those working with marginalized students but in staff cultures that aren’t Black.”

How we can actually do better

So what would it mean to take Black women educators’ well-being seriously?

My work will continue to engage three approaches that shift the focus from individualized “self-care” toward structural, community-rooted change:

Institutionalize sister circles: These peer-led spaces are already being used informally for mutual support, mentorship and storytelling. Schools should recognize and resource them as formal professional learning structures.

Build radical rest into policy: Instead of encouraging teachers to “unplug” after work, school boards can conduct equity audits and provide protected wellness time during the school day.

Co-create wellness initiatives: Black women educators must be at the centre of designing wellness policies that reflect their lived realities, not treated as afterthoughts in generic programming.

These changes require commitment, but they are not impossible. They ask school systems to shift from extractive relationships to reciprocal ones, where care is not just encouraged but embedded.

Afrofuturism invites us to envision education as a site of liberation, not just endurance. In doing so, it reminds us that the well-being of Black women educators is not a luxury. It is a political imperative, and a blueprint for better schools for everyone.

The Conversation

Nadia Clarke Cordick 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. We need to talk about how Black women educators experience burnout and care – https://theconversation.com/we-need-to-talk-about-how-black-women-educators-experience-burnout-and-care-274400

Could global tensions finally see Sweden warming towards the euro?

Source: The Conversation – UK – By Fredrik NG Andersson, Associate Professor, Department of Economics, Lund University

Vitaliy Kyrychuk/Shutterstock

Sweden has been part of the European Union for 30 years, yet it is one of the few EU countries that has kept its own currency, the krona. Legally, Sweden is expected to join the euro one day but in reality, that day keeps being pushed into the future.

This makes Sweden something of an outlier in Europe. In a referendum in 2003, 56% of voters said no to the euro, and no government since then has felt confident enough to revisit the question.

Now however, as Europe faces new economic and geopolitical pressures, there have been reports that the mood in Sweden is beginning to shift. The country’s central bank (Riksbank) recently acknowledged that the economic uncertainty caused by US president Donald Trump’s erratic tariff policies had “widened the range of potential outcomes”. But despite the headlines, any move would represent a major change in direction for Swedes.

Sweden’s relationship with European integration has always been pragmatic. Cooperation has been viewed primarily through an economic lens rather than as a political project.

During the cold war, the country’s policy of neutrality kept it outside the European Economic Community (the original European free trade area). When Sweden finally joined the EU in 1995, it did so largely because the creation of the single market in 1993 had reshaped trade across Europe. For a small, export-orientated economy, access to that market was essential.




Read more:
How Canada and Sweden are redefining northern security and co-operation


From the beginning, Swedish debate about EU membership centred on growth, jobs and stability rather than on questions of shared political identity. That economic focus would later shape attitudes towards the euro as well.

A second formative experience came from Sweden’s own financial and currency crisis in the early 1990s. After a period of currency turmoil, the Riksbank hiked interest rates to an astonishing 500% in a bid to prevent devaluation.

When this failed, the krona was allowed to float (meaning it could be traded on currency markets, which would determine its value) after being pegged to other currencies for more than half a century. Sweden then entered a deep recession.

The crisis marked a turning point. Sweden had moved to a floating exchange rate, the Riksbank was granted independence, and strict rules to prevent unsustainable budget deficits were introduced.

Over time these reforms restored credibility and stability. They also left a lasting imprint on public opinion: monetary independence and flexible exchange rates came to be seen by citizens as beneficial.

When the euro was being designed in the 1990s, Sweden was still recovering from its economic crisis. Public finances were strained and unemployment was high. A government-appointed commission concluded in 1996 that Sweden was not yet ready to join a monetary union. As a result, the country stayed out when the euro was launched in 1999.

Stronger on the outside?

When the 2003 referendum was called, memories of the 1990s crisis and the risks associated with fixed exchange rates were still vivid. So voters chose to remain outside.

Since then, Sweden’s economic performance has often been better than that of the euro area. Output has grown at a consistently faster pace, and the economy has weathered major shocks, including the global financial crisis, the European sovereign debt crisis and the COVID pandemic, with relative resilience.

Stronger growth has bolstered the public finances, and Sweden’s public debt ratio today stands at less than half the average level in the euro area.

As Swedish public opinion tends to evaluate European cooperation in economic terms, these comparisons matter. Support for the euro fell sharply during the euro debt crisis. Although it has recovered in recent years, roughly half of Swedes say they would vote no to joining while around one third would vote yes.

At the political level, the picture remains divided. Some parties continue to favour eventual membership, while others oppose it. The Social Democrats, Sweden’s largest party, are open to discussion but have made no commitment. The Moderate party is traditionally more pro-European and has signalled interest in reviewing the issue. The Sweden Democrats are firmly against adopting the euro.

But rising geopolitical tensions have nudged the tone of the debate. Sweden’s swift decision to join Nato in 2024 demonstrated that long-standing positions can change quickly. Some argue that deeper integration within the EU, including euro membership, would strengthen Sweden’s influence and reduce vulnerability in a more uncertain world.

If Sweden were to join, the formal process is relatively clear. It would need to participate in the EU’s exchange rate mechanism, align its legislation with euro area rules and meet the convergence criteria, such as limits on inflation and government deficits. It largely already satisfies these. In political terms, however, a new referendum would almost certainly be required.

For now, continuity appears more likely than change. Political parties remain divided. The updated review of the 1996 euro commission, chaired by the same economist, Lars Calmfors, did not agree on whether the benefits of adopting the euro would outweigh the costs.

Sweden’s approach to European integration has long been cautious and grounded in economic analysis. Unless Swedes become convinced that membership would clearly strengthen stability and long-term prosperity, the krona will probably remain as their national currency.

The Conversation

Fredrik NG Andersson 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. Could global tensions finally see Sweden warming towards the euro? – https://theconversation.com/could-global-tensions-finally-see-sweden-warming-towards-the-euro-276906

Trump tariff ruling shows top courts serve as last line of defence against strongman rule

Source: The Conversation – UK – By Andrea Loux Jarman, Senior Lecturer in Law, Bournemouth University

The US Supreme Court told Donald Trump on February 20 that the tariffs he has used to try and bend the world to his will are unlawful. Tariffs are taxes and it is not for the president to impose them. According to the US constitution, Congress holds the power of the purse.

Trump relied on the terms of a 1977 law designed to address national emergencies, the International Emergency Economic Powers Act, to impose the majority of his tariffs. The court held that this law did not provide Trump with the legal authority to impose them.

In a post on social media following the court’s decision, Trump called the justices who ruled against him a “Disgrace to our Nation”. And he has subsequently announced that he will rely on another law, section 122 of the 1974 Trade Act, to impose worldwide tariffs of 15%.

But even if Trump’s use of that law survives legal challenge, these tariffs would be time limited. The act says that after 150 days the tariffs would continue only if Congress says so. Trump disagrees, saying in his State of the Union address on February 25 that “congressional action will not be necessary”.

Trump is a would-be “strongman” leader. Like all strongmen, his aim is to concentrate political power in himself and those closest to him. Since returning to the White House in January 2025, Trump has preferred to rule by way of executive order rather than through the legislative process. He has done so despite his Republican party controlling both houses of Congress.

Strongmen want to rule without the interference or oversight of legislatures and courts. But Trump has discovered that, in a constitutional democracy that is governed by the rule of law, the Supreme Court will not allow that to happen.

Resisting strongman rule

Trump is not the only western leader to experience push back from a top court when seeking to bypass the legislature. In 2019, Britain’s then-prime minister Boris Johnson wanted to fulfil his political promise to “get Brexit done” unfettered by parliament.

He advised the queen to suspend parliament for five weeks in the lead up to the UK’s “exit day” from the EU. The UK’s Supreme Court ruled unanimously that this advice was unlawful because, in the UK, parliament is sovereign. Parliament has two constitutional roles: to pass legislation and to hold the government to account.

The court held that Johnson and his ministers were constitutionally required to explain and justify their policies, decisions and actions to parliament and to answer parliament’s questions. Parliament must be free to exercise its constitutional functions, the court said, especially in times of great change.

The UK and the US have vastly different constitutions. But when faced with strongmen tactics, the supreme courts in both countries have stepped in to uphold the constitutional role of the legislature.

The function of legislatures in a democracy, US Supreme Court Justice Neil Gorsuch declared on February 21 after invalidating Trump’s tariffs, is “to tap the combined wisdom of the people’s elected representatives, not just that of one faction or man”.

In Israel, Prime Minister Benjamin Netanyahu (another would-be strongman leader) and his justice minister, Yariv Levin, have embarked on a programme of judicial reform in recent years to strengthen the power of the executive in relation to the judiciary.

The Israeli parliament passed amendments to the country’s quasi-constitutional Basic Laws in 2023, which aimed to limit the power of the courts to review ministerial decisions. These reforms have caused a constitutional crisis.

Protests were staged against the reforms across Israel in 2023, and military reservists threatened to not report for service. The protests ended abruptly with the October 7 terrorist attacks in southern Israel later that year.

Israel’s Supreme Court struck down one amendment to the Basic Laws in early 2024, with all 15 justices convening for the first time in Israeli history. The court held that it had the power to review the Basic Laws and declared an amendment – that would have limited the court’s ability to review ministerial decisions – unlawful.

However, the ruling has not derailed Netanyahu’s plans to reform the Israeli legal system. In 2025, the Israeli parliament passed a law that introduces more political control over judicial appointments. A case challenging this law will be heard by the full bench of the Israeli Supreme Court in summer 2026.

Meanwhile, Levin is refusing to cooperate with the president of the supreme court, Yitzhak Amit, to make judicial appointments. The Israeli government is also seeking to dismiss the independent attorney-general, Gali Baharav-Miara, who has argued against the reform.

In his response to the recent decision in the US to strike down Trump’s tariffs, French president Emmanuel Macron said: “It is not bad to have a supreme court and, therefore, the rule of law. It is good to have power and counterweights to power in democracies.”

At a time when strongman tactics appear to be on the rise, the courts are providing the last line of defence against authoritarian rule.

The Conversation

Andrea Loux Jarman 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. Trump tariff ruling shows top courts serve as last line of defence against strongman rule – https://theconversation.com/trump-tariff-ruling-shows-top-courts-serve-as-last-line-of-defence-against-strongman-rule-276571

Ukraine: after four years of war, exhaustion on both sides is the main hope for peace

Source: The Conversation – UK – By Alexander Titov, Lecturer in Modern European History, Queen’s University Belfast

As Ukrainian officials meet with US negotiators in Geneva with the possibility of full three-way talks involving Moscow, Kyiv and Washington in early March, there’s a glimmer of hope that an end to the conflict may be in sight. But the fact that after four years this remains a glimmer speaks volumes about the difficulties in ending the war.

Even Donald Trump, who promised to end the war in one day, has now stopped issuing ultimatums and deadlines to the warring parties.

In what has become a war of attrition, discussions about vulnerabilities and losses are only meaningful when compared with those of the opposing side. Reflecting on how each side’s theories of victory changed over the four years helps to grasp the war’s overall trajectory.

Russia’s initial plan for a swift knockout of Ukraine was foiled within the first few days of the invasion. Instead, it settled into a conflict of grinding the enemy down through slow advances on the battlefield and debilitating attacks on the energy infrastructure in the rear, with the expectation in Moscow that at some point Ukraine would throw in the towel.

But the question is whether Russia has enough manpower and economic resources for this strategy.

Russia is finally experiencing economic difficulties due to a combination of western sanctions and falling oil prices, which fell from over US$100 (£74) per barrel in 2022 to approximately $60 in 2025. In 2026, the Kremlin had to raise taxes and reduce its reliance on oil, whose share of Russia’s budget fell from 40% in 2019 to 25% in 2025. Perhaps the Kremlin is beginning to realise that this cannot continue forever.

But Russia’s weakness is relative to that of Ukraine. This applies to war losses: Putin believes that Ukraine’s manpower losses are higher than Russia’s (which flies in the face of what some western researchers estimate) and that Ukraine, with a much smaller population than Russia, has much less staying power.

Ukraine’s theory of victory, meanwhile, has evolved from a belief in an outright military victory in 2022–23, to just trying to exhaust Russia’s military in 2025 by using the “wall of drones”. But as the Russian army had captured some key strongholds, such as Siversk, Pokrovsk and Hulyaipole, Kyiv’s new defence minister, Mykhailo Fedorov (the fourth since the start of the war), declared that Ukraine’s path to victory now was to kill 50,000 Russian soldiers per month. That’s more than most estimates of Russia’s recruitment, which is believed to be around 30,000 per month.

Western politicians and analysts have embraced this theory, arguing that Russia’s unsustainable losses justify Ukraine continuing with the war with their support.

But after four years, Kyiv’s position is hampered by the loss of the full support of what was once its key ally: Washington. The Ukraine frontline is being slowly but steadily forced back and in 2025 for the first time in the war there was no major Ukrainian offensive.

Kyiv’s best hope is to freeze the conflict along the current line of contact, get security guarantees from the west, join the EU, and maintain pressure on Russia through western sanctions. Unfortunately for Ukraine, there are issues with every item on this list.

The situation at home is challenging and funding from the west is declining, thanks to the US. Meanwhile, its energy infrastructure has been severely damaged, there are ongoing issues with unpopular mobilisations, and the country’s president, Volodymyr Zelensky, has suffered a significant blow from a major corruption scandal involving his closest aides.

However, crucially, Ukraine is still fighting and its best hope now is an economic collapse in Russia. Attacks on Russia’s oil industry were intended to hasten that collapse, but Moscow’s destruction of Ukraine’s energy grid has demonstrated its greater capacity for escalation. This year will not be easy for Ukraine.

Europe’s position

Since the start of the invasion, Europe’s ideal plan for helping Ukraine win has not changed. It is believed that a combination of economic sanctions and military aid to Ukraine will eventually cause Russia’s economic collapse and military defeat.

Other than this there is no European plan to end the war, except to try to prevent Trump from striking a deal which would favour Russia and gut Ukraine. For the best part of a year, the so-called coalition of the willing (Kyiv’s European allies led by France, the UK and Germany) has been talking about post-war plans with itself.

But the irony is that – despite being Ukraine’s biggest donor – coalition countries have been excluded from negotiating with Russia, whose consent to any western military deployment as a security guarantee for Kyiv will be essential.

Whatever happens, the EU will have to pay Ukraine’s bills, either to continue the war or to cover its post-war reconstruction. The EU’s promise to accept Ukraine as a member would also require increased funding over an indefinite period.

Whose side is the US on?

Under the Biden presidency, the US and Europe had the same theory of victory. However, since returning to power in January 2025, Trump has forced Europe to finance the supply of US military equipment to Ukraine. Meanwhile, it has opened negotiations with Russia to end the war.

The US push for peace remains a mystery. After all, if the Ukrainians are willing to fight and the Europeans are willing to pay for it, it is unclear why the US is so eager to end a war that is exhausting one of its geopolitical rivals in Russia.

Perhaps Trump genuinely wants to stop the killing. Or perhaps he believes that if the war is not stopped now, the eventual peace deal will be much worse for Ukraine and the west. Or maybe it’s simply a matter of stopping “Biden’s war”. A war that Trump has no interest in and that he clearly feels is hampering his plans to do business with Putin.

As with Gaza, a deal can be reached only when the parties involved in the conflict are exhausted and ready to stop fighting. In these circumstances, Trump’s mediation could succeed. For now, however, each side is still clinging to its vision of victory.

On its fourth anniversary, there is hope that this may be the last year of the war. While all sides are growing increasingly exhausted, it will be the “last mile” that matters most — who can muster the willpower and resources in the final stretch to end the war on their terms.

The Conversation

Alexander Titov 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. Ukraine: after four years of war, exhaustion on both sides is the main hope for peace – https://theconversation.com/ukraine-after-four-years-of-war-exhaustion-on-both-sides-is-the-main-hope-for-peace-276783

What makes a city beautiful? Here’s what ratings of thousands of urban landscapes reveal

Source: The Conversation – UK – By Eugene Malthouse, Research Fellow, Centre for Decision Research and Experimental Economics, University of Nottingham

Some buildings leave such an impression when you visit them that they can be forever summoned to the mind’s eye. For us, these include the soaring dome of St Paul’s cathedral in London, the Georgian grandeur of Royal Crescent in Bath, and the ascending towers and pinnacles of King’s College Chapel in Cambridge.

As psychologists with a particular focus on wellbeing, we are fascinated by the feelings these buildings instil in us – a sense of being grounded, of momentary stillness, even of awe.

But while the effects of experiencing beautiful surroundings on people’s wellbeing has been extensively researched, these studies have mainly focused on natural landscapes and settings.

We wanted to understand how people value different urban settings – and which types of building they view most positively. In England, 83 out of every 100 people now live in towns and cities, so variations in these urban landscapes can hold important consequences for wellbeing.

Our study, published in Frontiers in Psychology, found a particularly powerful effect when people viewed older buildings, particularly those classified as being of special historic or architectural interest. Indeed, we found these listed buildings are comparable with forests and lakes in terms of how people rated their scenic quality.

How we tested urban scenicness

Our study combined two large datasets – the first from Scenic-Or-Not, a website where people rate the scenicness of photographs taken throughout Britain on a scale from 1 (“not scenic”) to 10 (“very scenic”). For our analysis, we used only photographs taken within English urban areas, giving us 28,547 ratings of 3,843 images.

We combined this with Historic England’s dataset of more than 370,000 listed buildings throughout England and Wales, plus their grade – I (of exceptional interest), II* (particularly important) or II (special interest) – and the century in which the building was constructed.

Scenic-Or-Not website shows a photo of a church
A photo of a Nottinghamshire church on the Scenic-Or-Not website.
B Hilton

This enabled us to compare the ratings of views with and without listed buildings, and to explore other questions such as how the grade or century of construction influences the scenicness rating. Sometimes these buildings featured prominently in the photographs, other times only marginally – we counted them all the same.

We also used Google’s Vision AI tool to detect other features in photographs that might influence scenicness. This allowed us to rule out the possibility that photographs containing historic buildings were judged more scenic because they also tended to contain trees, for example.

In our study, the average scenicness of English urban areas was 2.43 out of 10 – significantly lower than how people rate the scenicness of natural environments. In another study that used the same platform to rate British rural scenes, these averaged 4.16.

But we also found that when a listed building was present in the photograph, this score was on average 0.61 points higher – a 25% increase. As shown in this table, this “historic building effect” was comparable to that of forests and lakes.

Impact of different features on scenicness rating:

Table showing the effect of different elements of a view on how scenic it is rated.
The effect of a listed building is similar to that of a forest or lake.
Eugene Malthouse, CC BY-SA

Photographs in which the most prominent listed building was either grade I or grade II* listed were perceived more scenic than those featuring slightly less historically or architecturally significant (grade II) buildings. Images featuring buildings constructed in earlier centuries were also judged more scenic.

What makes historic buildings so valued?

The scenic quality of urban areas has previously been linked with variations in happiness and health. Our study shows old buildings in particular make important contributions to urban scenicness. This suggests that historic buildings may be worth preserving not only for their architectural significance but for their effect on people’s wellbeing.

But it also raises the question of whether the sheer age of these buildings makes them so impactful – or is it also the nature of their design?

Experts in architecture have speculated on the reasons old buildings continue to be valued so highly. For example, the apparent timeless popularity of certain historic styles, such as the symmetry of Georgian architecture in Bath’s Royal Crescent, has been contrasted with modern architecture that disregards or rejects traditional proportional guidelines.

But there are also psychological reasons why many people value historic buildings so much. These might include their reassuring sense of permanence; their weathered and imperfect nature; the stories of past lives they hold; or their ability to conjure feelings of nostalgia within us.

We hope to learn more about why people feel so strongly about historic buildings, and the effects such buildings can have on their wellbeing, in our future research. In the meantime, please share your thoughts and experiences in the comments below.

The Conversation

Eugene Malthouse received funding from the European Research Council.

Sidney Sherborne received funding from the European Research Council.

ref. What makes a city beautiful? Here’s what ratings of thousands of urban landscapes reveal – https://theconversation.com/what-makes-a-city-beautiful-heres-what-ratings-of-thousands-of-urban-landscapes-reveal-276319

The biology of body odour, from sweat glands to skin bacteria

Source: The Conversation – UK – By Primrose Freestone, Senior Lecturer in Clinical Microbiology, University of Leicester

PeopleImages/Shutterstock

Sweat rarely smells on its own. Body odour develops when bacteria on the skin break down compounds in sweat and release volatile chemicals that evaporate into the air.

This interaction between sweat and microbes explains why some areas of the body smell more strongly than others, why odour varies between people and how deodorants and antiperspirants reduce it.

Sweat is a clear, salty liquid produced by glands across almost the entire surface of the skin. Its production is controlled by the autonomic nervous system, which regulates automatic bodily functions such as temperature and heart rate. The main function of sweat is cooling. When body temperature rises during exercise, stress or hot weather, sweat evaporates from the skin and carries heat away.

There are three main types of sweat gland, each producing slightly different fluids. Eccrine glands sit across most of the body and release a thin, watery sweat made mostly of water and salt. Apocrine glands, found mainly in the armpits and groin, produce a thicker fluid that contains fats, proteins and sugars. Apoeccrine glands, also concentrated in the armpits, produce sweat that is more similar to the watery type but in larger amounts.




Read more:
Anhidrosis: why some people – apparently like Prince Andrew – just can’t sweat


Odour develops when bacteria on the skin break down the substances in sweat. The skin naturally hosts many kinds of bacteria. Groups with names such as Corynebacteriaceae, Staphylococcaceae and Propionibacteriaceae are commonly involved. As they feed on sweat, they break its ingredients into smaller chemicals that evaporate easily and reach the nose, creating smell.

Different bacteria produce different scents. Staphylococcus hominis, commonly found in the armpits, creates chemicals that smell similar to onions. Corynebacterium and Staphylococcus epidermidis break down a building block of proteins called leucine into isovaleric acid, a compound produced when bacteria break down sweat that has a strong, cheese-like smell.

Some Corynebacterium species produce compounds often described as goat-like. These smell-producing chemicals can stick to clothing, which absorbs both sweat and bacteria, allowing odours to linger. Research confirms that specific bacteria are linked to characteristic odours.

Armpits and feet tend to smell more strongly because they combine dense sweat glands with warmth and moisture, creating favourable conditions for bacterial growth.

Washing removes sweat and reduces bacterial numbers, helping to limit odour. Changing clothes after heavy sweating is also important, as fabrics can trap sweat and microbes. Regular bathing and clean clothing reduce the build-up of odour-causing compounds.

Some people sweat excessively without heat or exercise. This condition, known as hyperhidrosis, affects around 2% of the population and often requires medical treatment rather than improved hygiene alone. Treatment options include prescription-strength antiperspirants, medications that reduce nerve signals to sweat glands, botulinum toxin injections, and iontophoresis, a treatment that uses a mild electrical current passed through water to temporarily reduce activity in sweat glands. In severe cases, surgery may be considered.




Read more:
7 things you can do if you think you sweat too much


Deodorants and antiperspirants tackle odour in different ways. Deodorants mainly target bacteria, using antimicrobial ingredients to slow their growth and fragrances to mask residual smells. Some plant-based products contain substances such as tea tree oil, potassium alum or pentagalloyl glucose, which also have antimicrobial effects.

Antiperspirants reduce the amount of sweat reaching the skin. Aluminium salts, such as aluminium chlorohydrate, form temporary plugs in eccrine sweat gland openings, limiting moisture and reducing the resources bacteria need to produce odour. Many products combine both approaches.

Body odour varies between people and can be influenced by genetics, age, diet, stress and health conditions. Food and drink can also play a role. Compounds from garlic, onions and some spices can circulate in the bloodstream and be released through sweat, altering its smell. Alcohol is partly excreted through breath and skin and can increase sweating, giving bacteria more material to break down.

Medications can affect body odour in similar ways. Some increase sweating, while others alter metabolism or change the balance of bacteria on the skin. Antibiotics, for example, can shift microbial communities, and certain antidepressants and diabetes medications may increase perspiration. These changes are usually temporary.

Men generally have larger sweat glands and tend to produce more sweat, which can support larger bacterial populations and higher levels of volatile fatty acids such as isovaleric acid, a compound produced when bacteria break down sweat that has a strong, cheese-like smell.




Read more:
The dirty truth about what’s in your socks: bacteria, fungi and whatever lives between your toes


Occasionally, changes in body odour signal an underlying condition. Trimethylaminuria is a rare inherited disorder in which the body cannot properly break down trimethylamine, resulting in a strong fish-like smell. There is no cure, but symptoms can often be managed through diet, specialised soaps, antibiotics that reduce certain gut bacteria and supplements that can help limit production of the chemical.

Other medical conditions can also alter body odour. Uncontrolled diabetes can produce a sweet or fruity smell on the breath, liver disease can cause a musty odour, and advanced kidney disease may lead to a urine-like smell. Certain infections and metabolic disorders can also change how the body smells.

For example, researchers have investigated whether analysing volatile chemicals released from the body could help detect infections such as malaria. One study examined whether odour profiles might assist diagnosis through chemical signatures in breath and skin emissions.

Sweat remains essential for regulating body temperature. It does not meaningfully remove toxins, despite common claims. Detoxification is carried out primarily by the liver and kidneys. This means you cannot “sweat off” a hangover or “sweat out” a cold. Alcohol is broken down by the liver, and viral infections are cleared by the immune system, not through sweat.




Read more:
The truth about detoxes – by a liver specialist


However, prolonged sweating during intense exercise or hot weather can lead to fluid and electrolyte loss. To prevent dehydration, it is important to drink enough fluids, and during sustained exertion drinks containing electrolytes may help replace what has been lost.

Body odour is not simply a matter of cleanliness. It reflects the complex interaction between sweat glands, skin bacteria, clothing, diet, medication and individual biology. For most people it is manageable and normal. In some cases, persistent or unusual changes in smell may warrant medical advice.


Strange Health is hosted by Katie Edwards and Dan Baumgardt. The executive producer is Gemma Ware, with video and sound editing for this episode by Anouk Millet. Artwork by Alice Mason.

In this episode, Dan and Katie talk about a social media clip via YouTube from Alexandrasgirly.

Listen to Strange Health via any of the apps listed above, download it directly via our RSS feed or find out how else to listen here. A transcript is available via the Apple Podcasts or Spotify apps.

The Conversation

Primrose Freestone 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. The biology of body odour, from sweat glands to skin bacteria – https://theconversation.com/the-biology-of-body-odour-from-sweat-glands-to-skin-bacteria-275491

How I brought a lost fanfare by Ethel Smyth back to life

Source: The Conversation – UK – By Christopher Wiley, Head of Music and Media; School of Arts, Humanities and Creative Industries, University of Surrey

Like a voice from the grave, an important part of Surrey’s cultural heritage has sounded again. It is a short ceremonial brass fanfare by Dame Ethel Smyth (1858–1944).

Fanfares are short, rousing pieces for brass instruments. Late last year I was asked to find one to open the installation ceremony for the University of Surrey’s new vice chancellor, Professor Stephen Jarvis. As this was going to be a high-profile public event attended by hundreds of people in Guildford Cathedral, I knew I needed a unique piece of music.

Rather than commission a new work, I revived a forgotten piece instead: Smyth’s Hot Potatoes fanfare. I chose this composer because she had strong local ties and links to university research.

In 1930, eight of the most prominent British composers of the day were commissioned to write short fanfares for the Musicians’ Benevolent Fund. Each lasted about a minute.

The last of the set was written by Smyth. She based it on a military bugle call, formally titled the Men’s Meal (2nd call). The call signalled that the troops could collect their rations. It is colloquially known as Hot Potatoes. Soldiers added comic words to help remember its meaning: “Oh, pick ’em up, pick ’em up, hot potatoes …”

Three months ago, the university’s department of music and media presented a major orchestral concert for the annual nationwide Being Human Festival. Several of Smyth’s works received their modern UK premiere.

One year prior, the university installed a maquette of Smyth outside its main music performance space on campus. It is a smaller replica of the lifesize-plus statue unveiled in 2022 a few miles away in the centre of her home town, Woking. My research revealed it to be one of few statues to women composers in the world.

At the pinnacle of Smyth’s impressive musical output lies her six operas, several of which are available in modern recordings. Her other compositions include a Mass (a musical setting of the Christian liturgy), a concerto for violin and horn and a symphony-cum-oratorio. Smyth is widely known in Britain and internationally as one of the greatest women composers in classical music history. She was also an influential suffragette and a much-published author of autobiographical and other prose writings.

Yet little is known of her Hot Potatoes fanfare, possibly the last piece she ever wrote, other than its original instrumentation: four trumpets, four trombones and percussion. It is rarely even mentioned in literature on Smyth.

Composed when she was in her 70s, experiencing profound hearing difficulties and with the greatest achievements of her career behind her, its manuscript has long been lost and for many years it seems to have been generally assumed that it could never be performed again.

The piece would have held particular significance for Smyth. She was familiar with military fanfares from childhood, since her father had attained the rank of Major-General in the British Army. She quoted such bugle calls in her own music, Hot Potatoes having previously appeared in the overture to her final opera, Entente Cordiale, the centenary of the first performance of which fell last year.

While the use of Hot Potatoes is not explicitly identified in the opera’s published vocal score, an archival copy now held in the Beecham Collection at the University of Sheffield is annotated in Smyth’s own hand to indicate its origin.

Smyth’s fanfare from past to present

Smyth’s Hot Potatoes and the other fanfares in the set were first performed by students from the Royal Military School of Music (Kneller Hall Musicians) under Captain H.E. Adkins. The occasion was the Musicians’ Benevolent Fund Annual Dinner held in London’s Savoy Hotel on May 8 1930 (coincidentally the same date on which Smyth died 14 years later), from where the performance was relayed for broadcast on the BBC National Programme.

The fanfares were reprised at this annual event a couple more times, including on St Cecilia’s Day, November 22 1932. The previous June, it had also been recorded by the same ensemble for release by His Master’s Voice (HMV) toward the end of that year. But thereafter the trail runs cold.

However, the HMV recording of the fanfares yielded sufficient information for me to transcribe and arrange Smyth’s piece for students of the University of Surrey Brass Ensemble. I based this work on my wider knowledge of the composer’s output, which proved invaluable in identifying and replicating her musical idiosyncracies.

The idea came to me during research undertaken for my most recent journal article, which takes one of Smyth’s early piano pieces as a case study for exploring questions of performance and interpretation in the rediscovery of “lost” music by historically marginalised composers.

Instead of a faithful transcription, I changed the scoring (though in a nod to the original, I retained four separate trumpet parts) as well as the key of the piece. I even recomposed one bar in its entirety.

Certain details were simply too difficult to make out on the recording, while others naturally lent themselves to being enhanced (and I was convinced that there was at least one wrong note). Nonetheless, this project demonstrates the creative possibilities for bringing back music assumed to be lost to history, and for celebrating diversity by resurrecting works by neglected artists.

Fittingly, since Professor Jarvis’s installation ceremony was an official university event, I conducted the Brass Ensemble from the Cathedral’s South Balcony while wearing my doctoral robes, as had been Smyth’s own practice when wielding the baton. I hope this recovery of Smyth’s Hot Potatoes fanfare will now lead to repeat performances.


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The Conversation

Christopher Wiley 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 I brought a lost fanfare by Ethel Smyth back to life – https://theconversation.com/how-i-brought-a-lost-fanfare-by-ethel-smyth-back-to-life-276479

¿Se ha descubierto la primera “luna” fuera del sistema solar?

Source: The Conversation – (in Spanish) – By Carlos Vázquez Monzón, Profesor Ayudante Doctor, especializado en Astrofísica y Astrodinámica, Universidad Loyola Andalucía

“Exoluna” orbitando su planeta (imagen artística). NASA, ESA, and L. Hustak (STScI)., CC BY

En los últimos meses, la comunidad astronómica se ha visto sacudida por una pregunta que muchos aficionados al cosmos se han planteado alguna vez: ¿existen lunas alrededor de planetas fuera del sistema solar? Aunque ya se han confirmado más de 6 000 exoplanetas, hasta ahora ninguna luna extrasolar había sido verificada de forma concluyente. Sin embargo, recientes observaciones sugieren que podríamos estar acercándonos a ese esperado hito científico.

El protagonista de esta historia es HD 206893 B, un objeto masivo situado a unos 133 años luz de la Tierra, en la constelación de Capricornio. Con una masa estimada de unas 23 veces la de Júpiter, se encuentra en una región difusa de la clasificación astronómica, a medio camino entre un planeta gigante y una enana marrón. Observado desde hace años captando directamente su luz con grandes telescopios, este mundo ya era peculiar por su atmósfera rica en polvo y por su juventud.

Ahora, además, ha revelado un movimiento inesperado: un sutil “vaivén” que podría delatar la presencia de un cuerpo acompañante.

Exoplaneta HD 206893 B, con su “luna”.
NASA, CC BY

Cómo se ha “visto” lo invisible

Detectar una luna alrededor de un exoplaneta es un reto formidable. Los planetas suelen descubrirse cuando transitan frente a su estrella o cuando su gravedad hace oscilar ligeramente a la estrella anfitriona. Las lunas, en cambio, son mucho más pequeñas y sus efectos, mucho más débiles. En el sistema solar, los satélites son omnipresentes, pero extrapolar esa experiencia a otros sistemas ha resultado extremadamente difícil.

En este caso, los investigadores han utilizado una técnica llamada astrometría, que consiste en medir con extrema precisión pequeños cambios en la posición de un objeto. Para ello, emplearon el instrumento GRAVITY, instalado en el Very Large Telescope Interferometer (VLTI), en el desierto de Atacama. Este sistema combina la luz de varios telescopios para alcanzar una precisión extraordinaria, capaz de medir desplazamientos diminutos.

El análisis de los datos reveló un pequeño movimiento de ida y vuelta del exoplaneta que se repite cada nueve meses. Ese “bamboleo” es coherente con la idea de que no se mueve solo, sino que está siendo perturbado por otro cuerpo que lo orbita. A diferencia de otros métodos, aquí no se detecta directamente la luz del supuesto satélite, sino su influencia gravitatoria sobre el planeta anfitrión.

Más grande de lo esperado

Si este objeto adicional es realmente una luna, se trataría de algo radicalmente distinto a cualquier satélite conocido. Las estimaciones preliminares apuntan a una masa de alrededor de 0,4 veces la de Júpiter, casi nueve veces la masa de Neptuno. Para hacernos una idea, la masa de la luna más grande del sistema solar, Ganímedes, es apenas una fracción diminuta de la masa de la Tierra.

Un satélite tan masivo plantea preguntas fundamentales. ¿Tiene sentido llamarlo “luna” o sería más apropiado hablar de un sistema binario de dos cuerpos gigantes? La distinción no es meramente terminológica. Las lunas regulares del Sistema Solar se forman en discos de material alrededor de los planetas, pero generar un objeto de semejante tamaño requeriría condiciones extremas o mecanismos alternativos, como la formación conjunta de ambos cuerpos a partir del mismo colapso gravitatorio.

La posible existencia de una exoluna tan masiva obligaría a revisar los modelos actuales de formación de satélites. También reforzaría la idea de que la arquitectura de los sistemas planetarios puede ser mucho más diversa de lo que sugiere nuestro propio vecindario cósmico. En este sentido, HD 206893 B se suma a una creciente lista de objetos que desafían las categorías tradicionales y difuminan la frontera entre planetas y estrellas fallidas.

¿Es realmente una exoluna?

Aquí es donde la prudencia se vuelve esencial. Aunque los datos son sugerentes, los propios autores del estudio subrayan que no se trata de una confirmación definitiva. La señal detectada podría deberse, en principio, a efectos instrumentales, a variaciones orbitales más complejas o a limitaciones en los modelos empleados para interpretar los datos.

La cautela está respaldada por precedentes. En el pasado, candidatos a exolunas alrededor de Kepler-1625b o Kepler-1708b generaron gran expectación, pero análisis posteriores arrojaron resultados ambiguos o, incluso, negativos. A ellos, se suma el caso de WASP‑49b, donde señales espectroscópicas inusuales –como una nube de sodio desplazada– han sido interpretadas por algunos estudios como posibles indicios indirectos de un satélite, aunque sin consenso ni confirmación definitiva.

La historia reciente recuerda que, en ciencia, las afirmaciones extraordinarias requieren pruebas extraordinarias.

Por qué importa

Más allá del impacto mediático, este posible hallazgo es relevante por varias razones. Demuestra el poder de nuevas técnicas observacionales para explorar fenómenos antes inalcanzables y abre una vía independiente a los métodos clásicos de detección. Además, amplía nuestro marco teórico sobre cómo se forman y evolucionan planetas y satélites.

Las lunas también ocupan un lugar especial en la búsqueda de vida fuera de la Tierra. Aunque el caso de HD 206893 B es demasiado extremo para albergar condiciones habitables, cada nuevo descubrimiento contribuye a comprender mejor la diversidad de entornos que existen en la galaxia.

Así, a pesar de que todavía no hay una exoluna confirmada, el posible compañero de HD 206893 B sitúa a la astronomía en un momento especialmente estimulante. Las próximas observaciones y el escrutinio riguroso de la comunidad científica decidirán si estamos ante una ilusión pasajera o ante el primer ejemplo real de una luna más allá del sistema solar. Mientras tanto, conviene seguir esta historia de cerca: podría marcar el inicio de una nueva etapa en la exploración de otros mundos.

The Conversation

Carlos Vázquez Monzón ha recibido fondos de la Unión Europea-NextGenerationEU, y de la Xunta de Galicia bajo la beca ED 431B 2020/38

ref. ¿Se ha descubierto la primera “luna” fuera del sistema solar? – https://theconversation.com/se-ha-descubierto-la-primera-luna-fuera-del-sistema-solar-274867