Category: The Conversation

Source: ForeignAffairs4

Source: The Conversation – Global Perspectives – By Kim Dovey, Professor of Architecture and Urban Design, The University of Melbourne

Balinese officials have begun the demolition of more than 40 businesses at Bingin Beach, a popular tourist spot in the Uluwatu region.

In June, the Balinese House of Representatives determined the settlement is on public land, and is therefore illegal and needs to be demolished. But I’d argue it doesn’t.

The ‘illegal’ settlement

The Bingin Beach coastal settlement began development in the 1970s as an informal surfer hub at the base of a steep escarpment. The beach is a few hundred metres long and largely disappears at high tide.

Originally lined with a string of makeshift warungs (small food stores) and cheap accommodations, the settlement has grown incrementally over the decades, up and along the escarpment, with an intensive mix of surf shops, restaurants and small hotels.

The steepness of the slope precludes vehicle access. The only public access is via two somewhat narrow pedestrian stairways.

While it initially served the surfer community, the settlement now caters to a broader tourist market, with some rooms going for upwards of US$150 per night.

But after more than 50 years of incremental development, the House of Representatives has declared the settlement was illegally constructed on state land, and has ordered the demolition of 45 buildings – effectively the entire settlement.

While most of the buildings seem highly durable, the demolition order is based on illegality, and not durability. A spokesperson for the traders argues most of the businesses are locally owned, and livelihoods are at stake.

The ‘legal’ settlement

The former farmland at the top of the escarpment is also covered with tourist developments that mostly emerged since 2010, and now extend up to a kilometre inland. This is a much more familiar landscape for Bali: a mix of walled hotel compounds and private villas, with manicured gardens and swimming pools.

However, one could scarcely call this larger settlement “planned”. Shops and restaurants emerge wherever they can find a market along the narrow roads. There are no sidewalks and pedestrians are constantly engaged in an anxious game of negotiated passing.

The infrastructure of roads and lanes has also been designed incrementally, across the former farm fields, as the settlement developed. The resulting street network is convoluted and largely unwalkable. The most common street sign is “no beach access this way”.

What is informality?

I’m an academic, architect and urban planner who studies informal settlements and informal urbanism more generally. In this context “informal” can mean illegal, makeshift and unplanned, but it can also mean incremental, adaptive and inventive.

Informal settlement is the means by which a large proportion of Indonesians produce affordable housing. It is also the most traditional form of indigenous housing globally.

After many decades of governments trying to demolish such settlements, the overwhelming consensus across the United Nations Human Settlements Programme is that wholesale demolition is rarely an answer. On-site formalisation and upgrading is the more sustainable pathway.

When engaging with informal settlements, we need to preserve the infrastructures that work and only demolish where necessary. The Bingin Beach escarpment settlement has proven sustainable and has become an integral part of the local heritage.

Its demolition will destroy livelihoods and displace the surfing market, while feathering other nests.

So why is it being demolished? Perhaps to clear the ground for the next round of up-market resorts – what urban studies research calls “accumulation by disposession”. Bingin is widely seen as a major real estate hotspot for investment.

What is overdevelopment?

One of the key dangers of informal settlement is “overdevelopment”. Without
formal planning codes, density can escalate to destroy the very attraction that produced the settlement.

Most buildings along the Bingin Beach escarpment are two to four storeys, and step back with the slope of the escarpment. The exception is the 2019 addition of the Morabito Art Cliff hotel that rises more than six storeys, obscuring the natural landscape, blocking views, and setting a precedent for more of the same.

If everyone in the area built like this, the Bingin settlement would be replaced with a cliff of buildings. To demolish this one building would set a useful precedent of containing the settlement to a sustainable scale.

The Impossibles dream

A few hundred metres south-west of Bingin Beach, a different story unfolds near the beach known as Impossibles. Here, a precarious limestone cliff largely precludes access to the beach, and the clifftop has long been lined with low-rise tourist compounds.

This earlier layer of development is now being demolished and replaced with larger, denser resorts as part of the Amali project which claims a “rare cliff-front location”. The location is “rare” because about half of the 50-metre-high cliff has been excavated to construct villa units quite literally in the cliff.

This excavation was well underway when, in May 2024, it caused much of the remaining natural cliff face to collapse onto the beach and into the ocean. It remains unclear whether the excavation was formally approved. Either way, it prompts the question: what if everyone did that?

The Bingin escarpment and the Impossibles cliff face represent very different kinds of development. One is incremental, irregular and geared to its social and environmental context, while the other is large-grain and environmentally destructive. It makes no sense to demolish the former in order to make way for the latter.

It is imperative to not only save the Bingin Beach settlement, which is part of Bali’s surfing heritage, but also to awaken from the impossible dream of building more and more villas on this fragile and limited coastland.

Kim Dovey 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. Bali is built on informal and ‘illegal’ settlements. Bulldozing Bingin Beach misses the real threat of overdevelopment – https://theconversation.com/bali-is-built-on-informal-and-illegal-settlements-bulldozing-bingin-beach-misses-the-real-threat-of-overdevelopment-261755

Source: ForeignAffairs4

Source: The Conversation – Global Perspectives – By Popi Sotiriadou, Associate Professor of Sport Management – Director Business Innovation, Griffith University

Most sports look to support their athletes to become “faster, higher, stronger” – in reference to the Olympic Games’ original motto – so it is perhaps surprising that cycling’s world governing body is trying to slow down elite riders.

However, there’s good reason the Union Cycliste Internationale (UCI) recently announced new rules to slow riders down.

These rules – which apply to elite road and cyclo-cross mass-start events for men and women such as the Tour de France – come into place shortly and are aimed at improving rider safety.

Read more:
I rode the Tour de France to study its impact on the human body – here’s what I learned

What are the new rules?

From August 1, a new bicycle gearing regulation will kick in.

Professional cyclists will only be allowed to use a 54-tooth front chainring with an 11-tooth rear cog.

This replaces the current common setup of 54-10.

To put this into context, a 54-tooth chainring is the big front gear on a bike and the 11-tooth cog is a small rear gear. Moving to a slightly bigger cog (54-11) makes it harder to hit top speeds: the change from a 54-10 to a 54-11 gear setup could reduce the top speed by about 2.4 kilometres per hour.

Pro riders can reach incredible speeds during descents, sometimes surpassing 130 kilometres per hour.

Then, from January 1 2026, handlebars must become wider, increasing from a minimum 350–360 millimetres width (depending on the event) to at least 400mm wide.

The handlebar width affects how a rider controls their bike: narrower bars reduce frontal surface area, making a rider more aerodynamic which again means a faster ride.

This is especially useful in time trials or sprints.

Wider bars offer better stability and control, helping navigate tight turns, peloton traffic, or crosswinds.

The UCI has also announced plans to introduce a formal helmet approval protocol in 2027, which will include separate standards for helmets used in mass-start events and time trials.

This shift suggests helmets may soon be subject to the same pre-race approval process as frames and wheels, potentially leading to safer, more regulated head protection.

New rules, different opinions

Professional cycling is getting faster due to stronger athletes, better training and advanced, lighter equipment.

As a result, high-speed crashes, especially downhill or in crowded sprint finishes, have become more common and more dangerous.

The UCI maintain the new regulations are part of a broader strategy to mitigate speed-related risks, enhance safety and uphold the integrity of the sport.

However, these measures have sparked debate within the cycling community.

Some elite cyclists, particularly those who have suffered severe crashes and injuries, suggest it is time safety caught up with technology.

Wout van Aert, who suffered a severe knee injury in September 2024 during a wet descent, said:

Limiting the number of gears would make the sport much safer.

Chris Froome, four-time Tour de France winner, also said he supported strategies “to keep the speeds down on the descents”.

The Professional Cycling Council supports testing gear ratio limits.

It is also likely these changes could limit cutting-edge innovations that only wealthy teams can afford. This would in turn narrow technological disparities across teams.

Former pro Michael Barry though believes gear restrictions are not the answer, and the UCI should instead focus on improved course design and inspection, better barriers and crash protective clothing.

Technology experts agree, arguing speed is determined more by a rider’s power output and aerodynamic drag than by gear ratios. To enhance safety, they propose alternative solutions such as real-time rider tracking, crash-protective clothing, improved course design and inspection and faster medical response.

The wider handlebar rule has also stirred controversy, especially among smaller-framed riders, many of whom are women, who typically ride with 360–380mm handlebars for better comfort and control.

Under the new regulation, those forced to use bars that exceed their optimal fit range could end up suffering from poor wrist alignment, increased fatigue and a higher risk of repetitive strain injuries.

Despite the growth of women’s cycling, the UCI has not made exemptions for smaller riders, raising concerns a one-size-fits-all solution may compromise inclusively and safety.

Even though regular riders can continue to use the equipment they prefer, what happens in the pro world often shapes non-elite rider preferences and trends, and the bikes sold in stores. If narrower bars are banned at the top level, manufacturers may stop offering them.

Historically, advancements in aerodynamics, gear ratios and component weights seen in the pro peloton have become standard features on consumer bikes.

A delicate balance

The UCI’s new regulations mark a likely shift towards standardised equipment and heightened safety. This deliberate emphasis on safety naturally elevates awareness among all cyclists about the crucial link between equipment choices and rider wellbeing.

While these restrictions may foster a more level playing field, they also risk curbing the sport’s long-standing tradition of engineering innovation.

The very appeal of professional cycling has often been intrinsically tied to the relentless pursuit of technological advancements that yield even fractional competitive advantages.

Striking a balance between ensuring safety and preserving this spirit of ingenuity remains a crucial challenge for the sport’s future.

Popi Sotiriadou 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. Cycling’s governing body is introducing new rules to slow down elite riders. Not everyone’s happy – https://theconversation.com/cyclings-governing-body-is-introducing-new-rules-to-slow-down-elite-riders-not-everyones-happy-260917

Source: ForeignAffairs4

Source: The Conversation – Global Perspectives – By Benjamin Pope, Associate Professor, School of Mathematical and Physical Sciences, Macquarie University

The day before my thesis examination, my friend and radio astronomer Joe Callingham showed me an image we’d been awaiting for five long years – an infrared photo of two dying stars we’d requested from the Very Large Telescope in Chile.

I gasped – the stars were wreathed in a huge spiral of dust, like a snake eating its own tail.

We named it Apep, for the Egyptian serpent god of destruction. Now, our team has finally been lucky to use NASA’s James Webb Space Telescope (JWST) to look at Apep.

If anything could top the first shock of seeing its beautiful spiral nebula, it’s this breathtaking new image, with the JWST data now analysed in two papers on arXiv.

Violent star deaths

Right before they die as supernovae, the universe’s most massive stars violently shed their outer hydrogen layers, leaving their heavy cores exposed.

These are called Wolf-Rayet stars after their discoverers, who noticed powerful streams of gas blasting out from these objects, much stronger than the stellar wind from our Sun. The Wolf-Rayet stage lasts only millennia – a blink of the eye in cosmic time scales – before they violently explode.

Unlike our Sun, many stars in the universe exist in pairs known as binaries. This is especially true of the most massive stars, such as Wolf-Rayets.

When the fierce gales from a Wolf-Rayet star clash with their weaker companion’s wind, they compress each other. In the eye of this storm forms a dense, cool environment in which the carbon-rich winds can condense into dust. The earliest carbon dust in the cosmos – the first of the material making up our own bodies – was made this way.

The dust from the Wolf-Rayet is blown out in almost a straight line, and the orbital motion of the stars wraps it into a spiral-shaped nebula, appearing exactly like water from a sprinkler when viewed from above.

We expected Apep to look like one of these elegant pinwheel nebulas, discovered by our colleague and co-author Peter Tuthill. To our surprise, it did not.

Equal rivals

The new image was taken using JWST’s infrared camera, like the thermal cameras used by hunters or the military. It represents hot material as blue, and colder material in green through to red.

It turns out Apep isn’t just one powerful star blasting a weaker companion, but two Wolf-Rayet stars. The rivals have near-equal strength winds, and the dust is spread out in a very wide cone and wrapped into a wind-sock shape.

When we originally described Apep in 2018, we noted a third, more distant star, speculating whether it was also part of the system or a chance interloper along the line of sight.

The dust appeared to be moving much slower than the winds, which was hard to explain. We suggested the dust might be carried on a slow, thick wind from the equator of a fast-spinning star, rare today but common in the early universe.

The new, much more detailed data from JWST reveals three more dust shells zooming farther out, each cooler and fainter than the last and spaced perfectly evenly, against a background of swirling dust.

New data, new knowledge

The JWST data are now published and interpreted in a pair of papers, one led by Caltech astronomer Yinuo Han, and the other by Macquarie University Masters student Ryan White.

Han’s paper reveals how the nebula’s dust cools, links the background dust to the foreground stars, and suggests the stars are farther away from Earth than we thought. This implies they are extraordinarily bright, but weakens our original claim about the slow winds and rapid rotation.

In White’s paper, he develops a fast computer model for the shape of the nebula, and uses this to decode the orbit of the inner stars very precisely.

He also noticed there’s a “bite” taken out out of the dust shells, exactly where the wind of the third star would be chewing into them. This proves the Apep family isn’t just a pair of twins – they have a third sibling.

Understanding systems like Apep tells us more about star deaths and the origins of carbon dust, but these systems also have a fascinating beauty that emerges from their seemingly simple geometry.

The violence of stellar death carves puzzles that would make sense to Newton and Archimedes, and it is a scientific joy to solve them and share them.

Benjamin Pope receives funding from the Australian Research Council and the Big Questions Institute.

– ref. Swirling nebula of two dying stars revealed in spectacular detail in new Webb telescope image – https://theconversation.com/swirling-nebula-of-two-dying-stars-revealed-in-spectacular-detail-in-new-webb-telescope-image-258314

Source: ForeignAffairs4

Source: The Conversation – UK – By Jack McNamara, Senior Lecturer in Clinical Exercise Physiology, University of East London

Your fitness tracker might be lying to you. That 10,000-step target flashing on your wrist? It didn’t come from decades of careful research. It came from a Japanese walking club and a marketing campaign in the 1960s.

A major new study has found that 7,000 steps a day dramatically cuts your risk of death and disease. And more steps bring even greater benefits.

People hitting 7,000 daily steps had a 47% lower risk of dying prematurely than those managing just 2,000 steps, plus extra protection against heart disease, cancer and dementia.

The findings come from the biggest review of step counts and health ever done. Researchers gathered data from 57 separate studies tracking more than 160,000 people for up to two decades, then combined all the results to spot patterns that individual studies might miss. This approach, called a systematic review, gives scientists much more confidence in their conclusions than any single study could.

So where did that magic 10,000 number come from? A pedometer company called Yamasa wanted to cash in on 1964 Tokyo Olympics fever. It launched a device called Manpo-kei – literally “10,000 steps meter”. The Japanese character for 10,000 resembles a walking person, while 10,000 itself is a memorable round number. It was a clever marketing choice that stuck.

At that time, there was no robust evidence for whether a target of 10,000 steps made sense. Early research suggested that jumping from a typical 3,000 to 5,000 daily steps to 10,000 would burn roughly 300 to 400 extra calories a day. So the target wasn’t completely random – just accidentally reasonable.

This latest research paper looked across a broad spectrum – not just whether people died, but heart disease, cancer, diabetes, dementia, depression and even falls. The results tell a fascinating story. Even tiny increases matter. Jump from 2,000 to 4,000 steps daily and your death risk drops by 36%. That’s a substantial improvement.

But here’s where it gets interesting. The biggest health benefits happen between zero and 7,000 steps. Beyond that, benefits keep coming, but they level off considerably. Studies have found meaningful benefits starting at just 2,517 steps per day. For some people, that could be as little as a 20-minute stroll around the block.

Age changes everything, too. If you’re over 60, you hit maximum benefits at 6,000 to 8,000 daily steps. Under 60? You need 8,000 to 10,000 steps for the same protection. Your 70-year-old neighbour gets 77% lower heart disease risk at just 4,500 steps daily.

The real secret of why fitness targets often fail? People give up on them.

Research comparing different step goals found a clear pattern. Eighty-five per cent of people stuck with 10,000 daily steps. Bump it to 12,500 steps and only 77% kept going. Push for 15,000 steps and you lose nearly a third of people.

One major study followed middle-aged adults for 11 years. Those hitting 7,000 to 9,999 steps daily had 50-70% lower death risk. But getting beyond 10,000 steps? No extra benefit. All that extra effort for nothing. Other researchers watching people over a full year saw the same thing. Step programmes worked brilliantly at first, then people slowly drifted back to old habits as targets felt unrealistic.

Most steps happen without you realising it

Here’s something that might surprise you. Most of your daily steps don’t come from structured walks or gym sessions. Eighty per cent happen during everyday activities – tidying up, walking to the car, general movement around the house.

People naturally build steps through five main routes: work (walking between meetings), commuting (those train station treks), household chores, evening strolls and tiny incidental movements. People using public transport clock up 19 minutes of walking daily just getting around.

Research has also found something else interesting. Frequent short bursts of activity work as well as longer walks. Your body doesn’t care if you get steps from one epic hike or dozens of trips up the stairs. This matters because it means you don’t need to become a completely different person. You just need to move a bit more within your existing routine.

So, what does this mean for you? Even 2,500 daily steps brings real health benefits. Push up to 4,000 and you’re in serious protection territory. Hit 7,000 and you’ve captured most of the available benefits.

For older people, those with health conditions, or anyone starting from a sedentary baseline, 7,000 steps is brilliant. It’s achievable and delivers massive health returns. But if you’re healthy and can manage more, keep going. The benefits climb all the way up to 12,000 steps daily, cutting death risk by up to 55%.

The 10,000-step target isn’t wrong exactly. It’s just not the magic threshold everyone thinks it is.

What started as a Japanese company’s clever marketing trick has accidentally become one of our most useful health tools. Decades of research have refined that original guess into something much more sophisticated: personalised targets based on your age, health and what you can actually stick to.

The real revelation? You don’t need to hit some arbitrary target to transform your health. You just need to move more than you do now. Every single step counts.

Jack McNamara 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. Sweet spot for daily steps is lower than often thought, new study finds – https://theconversation.com/sweet-spot-for-daily-steps-is-lower-than-often-thought-new-study-finds-261605

Source: ForeignAffairs4

Source: The Conversation – UK – By Nando Sigona, Professor of International Migration and Forced Displacement and Director of the Institute for Research into International Migration and Superdiversity, University of Birmingham

The letter that arrived for eleven-year-old Guilherme in June 2025 was addressed personally to him. The UK Home Office was informing him that he and his eight-year-old brother Luca must return to Brazil. Their parents, an academic and a senior NHS nurse, both long-term UK residents with valid visas were not included in the order.

“Whilst this may involve a degree of disruption in family life,” the letter stated, “this is considered to be proportionate to the legitimate aim of maintaining effective immigration control.”

The family’s difficulties with the Home Office began after the parents divorced a few years after arriving in the UK. Mother and children arrived in the UK as dependants on the father’s visa. After the divorce, the mother secured her own skilled worker visa, while the father was granted indefinite leave to remain in 2024.

Under current rules, skilled workers must wait five years before applying for settlement. For the children to qualify for settlement, both parents must be settled or one must have sole responsibility – neither condition applies here. Only after media attention did the Home Office reconsider the decision.

This case is just the latest example of how barriers to migrants’ family life are embedded in the UK’s immigration system – something I have been studying for years. The Labour government’s recently announced immigration plans extend and bolster these barriers.

Current rules require migrants to earn at least £29,000 to sponsor a spouse or child – a figure set to rise to £38,700 in early 2026 after changes introduced by the last government. The newest immigration plans propose doubling the path to settlement from five to ten years. And they restrict the rights to family reunion to only “nuclear” families: divorced parents, adult children and extended kin are left out.

These changes are aimed at reducing migration and restoring “public trust”. But in practice, they make family unity a luxury — harder to achieve for low-paid migrant workers and even for working-class British citizens with foreign partners.

Read more:
‘Just the rich can do it’: our research shows how immigration income requirements devastate families

The price of family life

Recent research my colleagues and I conducted — based on over 50 interviews with migrant domestic and food delivery workers and other experts — shows how the immigration system fractures families and puts children at risk.

Faith, a Zimbabwean domestic worker, explained how she was unable to bring her eldest daughter to the UK due to age restrictions on dependant visas. Her daughter was later trafficked into the UK and, though she eventually rejoined her mother, hasn’t recovered from the trauma of separation: “She’s struggling to sleep, can’t eat … always emotional, saying she feels dizzy, scared to be around people.”

Faith had been trapped in an abusive relationship for a long time because her visa was tied to her partner. When she eventually left her partner, her visa was withdrawn – leaving her in breach of immigration rules. Her younger child was placed in care while Faith was detained for breaching the terms of her visa.

Jamal, a food delivery rider from Eritrea, had a similar experience of legal dependency. He came to the UK on a dependant visa linked to his British wife. After their relationship deteriorated, his ability to remain in the country was threatened: “If we have problems, she can cancel my visa. This was her weapon.”

Susan, a Zimbabwean woman working in the care and cleaning sector, moved to the UK to look after her adult daughter who had cancer. When her six month visitor visa expired, she applied for asylum, but her application was refused and eventually she was detained for almost a month.

She faced deportation but was released after a legal aid lawyer helped her submit strong evidence of her daughter’s condition. Reflecting on her experience, she explained: “When it benefits them, they say I’ve had no contact [with my family in the UK]. When they want to deport me, they say I have family to return to [in Zimbabwe].”

Immigration status doesn’t just define one’s own legal position, it can determine who gets the right to have a family in the UK and who does not. While some of our interviewees secured status through a partner’s EU citizenship and reunited with family members already in the UK, others who rely on temporary visas are excluded.

Changes to the immigration in recent years have placed a higher value on how migrants can contribute or provide “value” – seeing them as workers (or students) first, not members of families. Many are allowed in the UK for a limited time and without the right to bring with them even the closest family members. The effect is particularly harsh on women in domestic work, whose visas are short-term and not renewable.

Many interviewees reported that immigration barriers delayed or obstructed their children’s education or healthcare. Samantha’s daughter waited over two months for a school placement because their legal status was still pending. Adriana was charged £8,000 for NHS maternity services because of her undocumented status, which restricts access to free healthcare to GP and emergency care.

Even in less extreme cases, legal insecurity takes a toll. Children grow up hearing their parents talk about “papers”, “Home Office letters” or the risk of being “sent back”.

That the Home Office sent a removal letter to an eleven-year-old is not a clerical error. It is the system working as designed. And even when public outrage forces a reversal — as in Guilherme’s case — the wider machinery of enforcement continues.

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Nando Sigona is Scientific Coordinator of “Improving the Living and Working Conditions of Irregularised Migrant Households in Europe” (www.i-claim.eu), a three-year six-country research project, funded by the European Commission’s Horizon Europe and UKRI.

– ref. How the UK’s immigration system splits families apart – by design – https://theconversation.com/how-the-uks-immigration-system-splits-families-apart-by-design-261134

Source: ForeignAffairs4

Source: The Conversation – UK – By Noel Flay Cass, Research Fellow in Energy Demand Behaviour, University of Leeds

If you’re thinking of buying a new electric car worth up to £37,000, the UK government has offered to knock up to £3,750 off the price. The measure adds up to £650 million in grants for people to buy EVs (electric vehicles), but as a researcher who studies transport policy and climate change, I think this money would be better spent subsidising e-bikes.

Numerous questions surround the new government policy. Might people who can afford a new car buy one anyway, without the 10% discount? Might car dealers simply reduce the discounts they offer by a similar amount? Given the 20% VAT on an EV, doesn’t a sale actually result in a 200% immediate return for the government? And isn’t this mainly a bung to car manufacturers and company fleets?

The grants come on top of financial assistance for replacing cars, vans, taxis and motorbikes with electric options, announced in February – £120 million in total, including £500 grants for e-motorbikes. But almost no subsidies are available for two-wheeled, pedal-assisted EVs: e-bikes and e-cargo bikes.

The main financial help for buying e-bikes is the cycle to work salary-sacrifice scheme. The employer buys the bike and then instalments are deducted from a participant’s pay before tax, but the scheme’s eligibility is limited to employees on standard payroll tax (PAYE workers) whose sacrifices don’t drop their pay below minimum wage.

This also excludes those who are out of work, the low-paid, the self-employed and retired, arguably people who might benefit most from an e-bike.

Benefits beyond carbon savings

We know that e-bike owners replace lots of trips and miles driven by cars. We also know the upfront cost of around £2,000-£3,000 is a barrier to more people owning one, despite e-bikes being much cheaper than cars.

Estimates of annual carbon savings from e-bikers avoiding car trips vary, from as little as 87kg CO₂ in a 2016 study to 394kg in research published the following year. Estimates published in 2020 and 2023 put the annual climate dividend at 225kg and 168kg of CO₂ respectively – roughly in line with emissions for one person making a return short-haul flight.

These might seem small savings compared to the tonnes of CO₂ that an EV can save. However, e-bike incentives would have two big advantages.

First, policies that encourage active travel, including cycling, have been assessed by the government multiple times to determine the payoff from investment. It turns out that they have huge benefit to cost ratios – 9:1 on average (internationally it’s 6:1).

Conservatively, policies to encourage cycling pay back £5.50 in social benefits for every £1 invested. These benefits are largely savings for the healthcare system. In a project I worked on, in which we lent e-cargo bikes for free to 49 households in Leeds, Brighton and Oxford for several months, e-cargo bike users cycled up to three times more than non-users in our surveys.

E-cargo bike borrowers also reported mental-health benefits on top of satisfaction at being able to combine fitness with functional everyday trips, which were longer than they would attempt on a conventional bike. The cargo bikes especially helped with combining trips – commutes with shopping and school runs, for instance – meaning that more than 50% of trips and miles replaced car usage.

Second, e-bike incentives can be designed to appeal especially to the lower-paid, who have been found to use their e-bikes more than wealthier buyers, which would also replace more car trips. The highest of a sliding scale of means-tested incentives in a Canadian study attracted poorer first-time e-bike buyers with existing high car-use.

This reaped average annual carbon savings of 1,456kg for those in receipt of the maximum CAN$1,600 (£868). As the authors suggest, these incentives may have helped low-income households realise their preferences for less dependence on cars.

E-bike grants could get more people out of cars

But how many drivers want to drive less? According to research that groups people into camps based on travel preferences, up to 50% of travellers in the UK are “malcontented motorists” and “active aspirers” (to travel differently).

Our research also found that guilt, or trying to minimise car use, was a major motivator for nearly all of our participants. While the government has funded free e-(cargo) bike trials like ours, the main cycling organisations we talked to pointed out that use would “fall off a cliff” when the trial ends because of the cost barrier. Those who would struggle to buy one were back in the same position as before.

A government evaluation of free e-bike loans concluded they were poor value for money, but it tracked purchases made soon after with a tiny response rate. Our project followed up after a year and found 20% of our borrowers had bought an e-cargo bike. Trial loans and grants together might achieve even more.

The new EV grant money could provide nearly 750,000 e-bike or e-cargo bike purchase-incentives the size of the Canadian ones, which could lead to annual carbon savings of 1.125 million tonnes of CO₂, according to the weekly average savings they found in that group.

Given the conservative benefit to cost ratio of 5.5:1 from such a UK scheme, this investment could also reap more than £3.6 billion in social benefits – especially from a fitter car-dependent population. There would potentially be a massive boost to the struggling UK e-bike and e-cargo bike market as well.

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Noel Flay Cass receives funding from UK Research & Innovation grant EP/S030700/1 through the Elevate project: (Innovative Light ELEctric Vehicles for Active and Digital TravEl).

– ref. Subsidising e-bikes instead of cars could really kick the electric vehicle transition into high gear – https://theconversation.com/subsidising-e-bikes-instead-of-cars-could-really-kick-the-electric-vehicle-transition-into-high-gear-261429

Source: ForeignAffairs4

Source: The Conversation – UK – By Colleen Murrell, Chair of the Editorial Board, and Full Professor in Journalism, Dublin City University

Donald Trump’s campaign against the “fake news” media continues largely unchecked, with a decision that is expected to reduce reporting and close down some local news stations around the US.

This follows a House of Representatives decision on July 18 to agree with the Senate and slash US$1.1 billion (£813 million) funding to the Corporation for Public Broadcasting (CPB), which manages the money for National Public Radio (NPR), the Public Broadcasting Service (PBS) and their member stations. These cuts will affect the next two years of their operations.

There are fears that some local and rural stations will be forced to lay off staff and may even have to close, if they haven’t amassed significant cash reserves or receive other funding. Don Dunlap, the president of KEDT-TV/FM in Texas, said in an interview: “There are ten public TV stations in Texas, and we’re thinking probably six of them will close down within a year.”

Experts are warning that in national emergencies such as wild fires and floods, local news media are “absolutely essential services” – and that they may not be able to help keep citizens well informed in future. “Nearly three-in-four Americans say they rely on their public radio stations for alerts and news for their public safety,” NPR’s CEO Katherine Maher said .

Trump has had these media outlets in his sights for a while, claiming they are a waste of taxpayers’ money and are ideologically biased against Republicans – a claim denied by NPR and PBS.

Read more:
PBS and NPR are generally unbiased, independent of government propaganda and provide key benefits to US democracy

Public broadcasting regularly sends out alerts related to extreme weather and emergency news. This appears particularly pertinent after the recent Texas floods which killed 135 people. Kate Riley, CEO of America’s Public Television Stations, said local news outlets provide “essential lifesaving public safety services, proven educational services and community connections to their communities every day for free”.

Republican senator from Alaska Lisa Murkowski said she recently received a tsunami warning from her local radio station after an earthquake. Murkowski has tried to introduce an amendment to reduce the cuts to local stations.

The more-than-1,000 NPR stations around the US are vulnerable precisely because significant funding comes from federal sources. According to figures from news organisation Politico: “Approximately 19% of NPR member stations count on CPB funding for at least 30% of their revenue.”

Ed Ulman, president and CEO of Alaska Public Media, told Politico that over a third of public media stations in his state will shut down “within three-to-six months”. He has begun a renewed public funding campaign on social media.

Even at well-funded TV stations such as Arizona PBS, owned by Arizona State University and run by its Walter Cronkite School of Journalism and Mass Communications, some curtailing of plans is afoot. The station provides daily programming to the region, and has trained generations of journalism students to enter careers in TV and radio. Following the announcement of these federal cuts, I spoke to Scott Woelfel, the station’s general manager, who said:

Arizona PBS will lose about US$2.3 million per year over the next two years. That represents around 13% of our total budget. While that is a significant percentage, its loss will not prevent us from operating. In fact, we prepared a reduced budget in the likely event that the rescission would occur, and have been operating under it since July 1 … It contains cuts across the board in an equal amount to the lost revenue.

Following these federal cuts, 60% of the station’s funding will derive from charitable giving, 16% from corporate support and a further 24% from state grants for education services. Woelfel doesn’t plan on making any staff cuts, but said some unstaffed positions will remain open indefinitely – and that the station will be “delaying major new initiatives until new funding is found”.

What happens next?

Overall, these cuts are likely to create additional “news deserts” – regions of the US which don’t have access to important local news and information.

After President Lyndon B. Johnson signed the Public Broadcasting Act of 1967 into law to give funds to public broadcasting, he said: “While we work every day to produce new goods and to create new wealth, we want most of all to enrich man’s spirit. That is the purpose of this act.” But such touching sentiments now seem old-school in this era of Trump’s loud media wars.

In the past week, the US president has also announced he would sue “the ass off” Rupert Murdoch, founder of News Corp, and the Wall Street Journal, which News Corp owns. This follows the WSJ’s publication of a story concerning a 2003 birthday letter framed around the outline of a naked woman that Trump allegedly sent to sex offender Jeffrey Epstein. Trump said the letter was fake. His US$10 billion lawsuit also takes in the WSJ’s owner, Dow Jones, and two of its reporters.

As Trump pushes forward with significant changes to the media landscape, he is no doubt hoping that friendly television stations such as Fox News – also a part of Murdoch’s empire – as well as his influencer following will stay loyal to his brand.

His Maga followers will undoubtedly be supportive of budget cuts and his anti-PBS and NPR statements. But when it comes to reporting from a flood or fire, influencers tend not to be on the ground supplying local residents with up-to-date information. Voters may find those important, and sometimes life-saving, services hard to replace.

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Colleen Murrell received funding from Irish regulator Coimisiún na Meán (2021-4) for research for the annual Reuters Digital News Report Ireland.

– ref. Trump’s budget cuts could shut down local news outlets and reduce reporting on emergencies – https://theconversation.com/trumps-budget-cuts-could-shut-down-local-news-outlets-and-reduce-reporting-on-emergencies-261493

Source: ForeignAffairs4

Source: The Conversation – UK – By Paul Hough, Lecturer Sport & Exercise Physiology , University of Westminster

In elite sport, the phrase “past your prime” is rapidly being redefined.

At 38, Jess Fishlock just became the oldest goalscorer in UEFA Women’s Euro history. At Euro 2024, Portuguese defender Pepe made headlines not for a red card or faking injury — but for simply stepping onto the pitch at age 41, becoming the oldest player to feature in a European Championship. Fellow veterans Cristiano Ronaldo (39), Luka Modrić (38), and Keylor Navas (38) also made appearances.

And it’s not just football. Serena Williams won the Australian Open at 35 (while pregnant). Roger Federer won a Grand Slam at 36. Rafael Nadal became the oldest French Open champion at 36. Novak Djokovic, now 38, won Olympic gold in 2024 and reached the semi-finals of all three Grand Slams this 2025.

In American sports, Tom Brady retired at 45 after 23 physically punishing NFL seasons. LeBron James, at 39, is still dominating in the NBA, having won the inaugural NBA Cup with the LA Lakers in 2023.

These aren’t just feel-good stories; they reflect a growing trend. Athletes are staying competitive for longer and pushing the boundaries of peak performance. But how?

Research backs the shift. A study on Olympic athletes found that between 1992 and 2021, the average age of male Olympians rose from 25 to 27, and female athletes from 24 to 26. In football, a study of UEFA Champions League players found the average player age rose by nearly two years between 1992 and 2018.

So how are older athletes continuing to thrive in elite sport? Here are some of the key factors.

1. Smarter training

Modern athletes benefit from personalised training programmes informed by cutting-edge sports science. Tools like GPS tracking, heart rate variability (HRV), and biomarker analysis help coaches monitor performance, recovery and injury risk.

Metrics such as HRV, for example, can indicate when an athlete might need more rest, which is crucial for older athletes who take longer to recover after intense competition.

Athletes are no longer reliant on a single coach. Today, they work with integrated teams – sports scientists, strength and conditioning coaches, and performance analysts – all dedicated to improving their fitness and performance.

2. Better injury prevention and medical support

Athletes now undergo regular fitness testing and musculoskeletal screening to identify potential weaknesses before they lead to injury. And when injuries do occur, recovery methods have vastly improved.

Anterior cruciate ligament (ACL) injuries were once considered career-ending for older athletes. But thanks to advanced surgical techniques and biological therapies, recovery is now faster, and athletes return to play much sooner.

Zlatan Ibrahimović, at age 35, returned to top-level football just seven months after an ACL tear – a feat nearly unthinkable a decade earlier.

3. Optimised recovery and nutrition

Ageing athletes have different recovery needs — and sports science has stepped up. Cryotherapy, compression therapy, and advanced sleep protocols all help reduce muscle soreness and accelerate repair.

Nutrition plays a key role too. Ageing bodies experience more inflammation and slower repair, so diets rich in polyphenols (found in berries, leafy greens, and dark chocolate) are used to support vascular health and recovery. Athletes may also take approved supplements such as glucosamine and chondroitin to support joint health and slow degeneration.

The result? Older athletes can train more consistently and recover faster between games.

4. Experience and tactical intelligence

Speed and strength decline with age, but tactical intelligence often improves. Older athletes can compensate for age-related declines in physical capacity with their advanced game-reading skills and spatial awareness. For instance, footballers like Paul Scholes and Andrés Iniesta adapted their playing styles with age, relying more on positioning and passing intelligence than physical capacity.

5. Financial and legacy incentives

Today’s stars aren’t just competing for medals – they’re building brands. With massive financial rewards on offer, there’s a clear incentive to prolong careers.

Cristiano Ronaldo, for example, recently signed a two-year contract extension with Al-Nassr that will see him play until age 42 — reportedly earning an estimated £492 million. For many athletes, the chance to leave a lasting legacy and secure generational wealth keeps them in the game.

While we can’t stop the biological effects of ageing, today’s athletes are proving we can delay their impact – and even thrive later in life.

With smarter training, better recovery strategies and cutting-edge medicine, the upper age limit for peak performance continues to stretch. These advances may allow more veteran athletes to defy expectations and continue competing at the highest level.

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Paul Hough 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. Five ways professional athletes are redefining the limits of age in sport – https://theconversation.com/five-ways-professional-athletes-are-redefining-the-limits-of-age-in-sport-261028

Source: ForeignAffairs4

Source: The Conversation – UK – By Rebecca Anne Barr, Associate Professor in English Literature, University of Cambridge

British satirist Cold War Steve has published a series of images based on the British painter William Hogarth’s The Rake’s Progress (1733-35). Hogarth’s 18th-century original charts the catastrophic decline of an affluent young man, Tom Rakewell. Cold War Steve’s 2025 reimagining substitutes the foolish rake with the US president, Donald Trump.

Hogarth’s eight densely packed images are a forerunner of the modern comic script, a kind of condensed graphic novel. The works swarm with life and hidden meanings for viewers to decode.

Tom starts out in high life, flashing his cash and enjoying himself. But he is rapidly drawn into a vortex of late-night drinking, gambling and prostitution. Desperate to save himself from extreme poverty, he sells himself in marriage to an older woman (no cougar, alas, but a rather decrepit heiress).

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But he still cannot control his behaviour. Tom is eventually imprisoned for debt, loses his mind – either to syphilis or sorrow – and dies in Bedlam, the notorious 18th-century madhouse.

Hugely popular and culturally influential, A Rake’s Progress is a modern morality tale. It’s a warning against the perils of self-indulgence, and a devastating critique of those too wealthy and foolish to care about the damage they do.

Political satire as tragicomedy

Keeping close to the original narrative, Cold War Steve uses the 18th-century paintings as backdrops, while altering the object of the satire by making Trump the main target. Renamed Trump’s Progress, this is a pointed political satire, directed at those in power.

Steve’s is a 21st-century reimagining, not a pious homage. Instead, Trump’s Progress has an irreverent punk aesthetic: a horde of Trump-supporting celebrities (such as Don King, Hulk Hogan and Liberace) are photoshopped into his digital canvases, cavorting crazily alongside Trump as he moves from his immense wealth to political pre-eminence.

Both funny and dark, this is political satire as tragicomedy. The contemporary satirist takes Hogarth as precedent, suggesting a bad end lies in store for the president.

Just as the 18th-century rake ends up in the madhouse, Cold War Steve ends his sequence with an aged Trump lying in a prison cell. Trump is tended to by Israel’s prime minister, Benjamin Netanyahu, and his daughter Ivanka, while his other erstwhile friends look less than pleased to be incarcerated along with him.

Hogarth was a key figure in 18th-century culture. His images of late-night drunkenness , sleazy politicians, and the cheek-by-jowl of luxury living and extreme poverty encapsulated the irrepressible messiness of modern life.

Hogarth reflected Britain’s aspirations to liberty and progress, but also its ongoing struggles with consumerism, luxury, corruption, and greed. These are issues that dominate our present day too, and give Hogarth’s satires an urgent and unsettling relevance.

This is not the first time Cold War Steve has used historical images from the 18th century to indict the present. In a recent article, I explored how Hogarth became a powerful visual source for the satirist during the COVID-19 crisis.

In May 2020, Steve published an update of Hogarth’s famous print, Gin Lane. The original shows London as a drunken dystopia, as the poor turned to cheap imported gin to ease their daily grind.

But Cold War Steve’s version dramatically altered the image’s moral message. By populating the city street with members of the Tory party and Britain’s business elite, he accused the government of gross moral negligence in treating the pandemic as an opportunity to make money.

The choice of Hogarth is not accidental. Not merely familiar to students of art history, Hogarth has a cultural legibility that makes his work an influential satirical template for artists who want to comment on the social malaise of their times.

Being in conversation with Hogarth gives contemporary works added gravitas. The veteran cartoonist Steve Bell created numerous parodies of Hogarth throughout his time at the Guardian and other publications.

In 2016, English artist Thomas Moore created a version in which the 18th-century gin craze has been replaced by the obesity epidemic. Hogarth’s impoverished city street is now full of fast food shops, pubs and pawnbrokers. The manic energy and cultural anxiety of Hogarth’s satires resonates with our own accelerated culture and widespread sense of moral and social decline.

In his study of the cultural afterlives of the 18th century, scholar James Ward has shown that postmodern popular culture often invokes Hogarth to question the assumption that our distance from the past is the same as progress.

By splicing together images of the past with the present, Cold War Steve’s visual satires make the serious political point that society has failed to progress since the enlightenment. In his eyes, the vices that Hogarth showed ravaging his society are still part of a culture of political shamelessness, personified by Trump.

Steve’s energetically subversive reworking of 18th-century material shows how Hogarth’s satires continue to be understood and appreciated by diverse audiences.

Former prime minister Boris Johnson portrayed Hogarth as a patriotic British product. But by successfully translating Hogarth’s satires for a transatlantic audience, Cold War Steve shows that his appeal transcends both national and political divides. Current politics might be almost beyond parody on both sides of the pond, but Steve’s bleak humour shows us that satire is thriving.

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Rebecca Anne Barr 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 takes lead role in Cold War Steve’s reimagining of Hogarth’s 18th-century satire, The Rake’s Progess – https://theconversation.com/trump-takes-lead-role-in-cold-war-steves-reimagining-of-hogarths-18th-century-satire-the-rakes-progess-261701

Source: ForeignAffairs4

Source: The Conversation – UK – By Valentina Rossi, Postdoctoral researcher, Palaeontology, University College Cork

A delicate, innocuous little fossil reptile known as Mirasaura grauvogeli – “Grauvogel’s wonder reptile” – is forcing a rethink about the evolution of skin and its appendages such as feathers and hair.

These newly discovered fossils, from the Middle Triassic (247 million years old)
Grès à Voltzia site in northeast France, preserve evidence of some of the most astonishing soft-tissue features described to date in ancient reptiles. We are two of the authors of a new paper on these finds, published in Nature.

These fossils show that the tree dwelling Mirasaura had a large and startling crest along its back. The crest is formed by elongated appendages that are neither scales, feathers nor hair.

Until now, complex skin outgrowths such as feathers were thought to have evolved only much later – in birds, dinosaurs and pterosaurs. This probably occurred through a single origin in the common ancestor of these animals. In all other types of reptile, the only skin outgrowths present are scales.

Mirasaura has overthrown this paradigm in sensational fashion. Compared with the size of its body, the long blades of its tall dorsal crest are enormous. Closer inspection reveals this crest comprised individual, overlapping appendages, each with a narrow central ridge and a lobed outline, similar to the shaft and form of feathers.

However, the fossil structures seem to lack the fine branching architecture that characterises most feathers in modern birds. What’s more, Mirasaura is not related to birds, dinosaurs or pterosaurs, but instead belongs to a very ancient group of reptiles, the drepanosauromorphs, that are known only from the Triassic.

The soft tissues of Mirasaura are preserved as a thin brown film, rich in fossil melanosomes – cell structures that contain the pigment melanin during life. Research by our team at University College Cork and others has revealed widespread preservation of fossilised melanosomes in ancient vertebrates. These pigment granules can actually be used to reconstruct melanin-based colour patterns in extinct animals.

Our team’s research has shown that fossil melanosomes can also help reconstruct the soft tissue anatomy of fossil animals, because melanosomes from different body tissues have different shapes and sizes. Our comprehensive examination of the fossilised soft tissues in Mirasaura, coupled with rigorous statistical analysis of the preserved melanosomes, reveals that their geometry is consistent with melanosomes in feathers, but not with melanosomes found in hair and in reptilian skin. This strongly suggests the Mirasaura skin appendages share common developmental features with feathers.

Were the Mirasaura structures feathers, then? The solid, continuous blade of soft tissues either side of the central shaft shows no evidence for branching, which is a defining characteristic of most feathers in birds, dinosaurs and pterosaurs. The water is muddied, however, by the simple unbranched structure of some peculiar feathers in birds – such as the bristles of the turkey’s “beard”. Similar unbranched filaments are known in many dinosaurs and pterosaurs, and are widely considered to represent simple feathers.

Certain dinosaur fossils even have flattened, strip-like feathers that lack branching but possess a central shaft, considered by some experts to be an unusual – extinct – feather type. Whether the resemblance between these fossil structures and the Mirasaura skin outgrowths is superficial or belies closer evolutionary ties remains to be seen.

Intriguingly, research on the developing chick embryo shows that feathers can lose their branched structure when certain genes are manipulated. We are currently examining in greater detail the morphology and composition of the Mirasaura structures to help us interpret their anatomy more definitively.

Irrespective of what type of skin outgrowth they represent, our analyses of the anatomy of Mirasaura consistently position it, as well as other drepanosauromorph reptiles, at the base of the reptile tree. This supports data from developmental biology indicating that the genetic basis for the growth of complex skin appendages probably originated in the Carboniferous period, over 300 million years ago.

Mirasaura therefore provides the first direct evidence that complex skin appendages did appear early during reptile evolution, and are not unique to pterosaurs, birds and other dinosaurs.

We owe these new insights to painstaking conservation efforts, which serve as a reminder of the critical importance of natural history collections in conserving our natural heritage.

The earliest discoveries of Mirasaura remains were unearthed in the 1930s by fossil collector Louis Grauvogel. After decades in the Grauvogel family, these specimens were donated to the State Museum of Natural History Stuttgart in 2019, where careful preparation revealed their true significance.

Now, the Mirasaura specimens force us to accept that even before the age of dinosaurs, reptiles were evolving striking anatomical traits normally associated with much younger fossils. This adds an intriguing dimension to future research into the origins of feathers, prompting palaeontologists to consider fossils from more diverse reptile groups – and from time periods before the appearance of dinosaurs and their direct ancestors.

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Valentina Rossi research is funded by the European Research Council. She is affiliated with University College Cork (UCC)

Maria McNamara receives funding from the European Research Council and Research Ireland.

– ref. Mysterious fossil may rewrite story of skin and feather evolution in reptiles – https://theconversation.com/mysterious-fossil-may-rewrite-story-of-skin-and-feather-evolution-in-reptiles-261695

Source: ForeignAffairs4

Source: The Conversation – UK – By Rosa Busquets, Associate Professor, School of Life Sciences, Pharmacy and Chemistry, Kingston University

When actor Orlando Bloom revealed recently that he’d undergone a procedure to have his blood “cleaned”, many people raised eyebrows. The Pirates of the Caribbean star had turned to a treatment known as apheresis – a medical process in which blood is removed from the body, centrifuged or filtered to extract certain components, then returned in an attempt to flush out microplastics and other toxins.

Apheresis is typically used to treat conditions such as autoimmune diseases or abnormally high levels of blood cells or proteins. Its use as a detox for microplastics, however, is scientifically unproven.

Still, Bloom said he suspected his body had absorbed plastic through daily exposure, and wanted it out of his system.

He’s probably right about the exposure. Scientists have found microplastics – tiny plastic fragments less than 5mm in size – in our air, water, soil, food and even inside human tissue. But when it comes to removing them from the bloodstream, that’s where the science gets murky.

As researchers studying microplastic contamination, we’ve examined this issue in the context of dialysis – a life-saving treatment for patients with kidney failure. Dialysis filters waste products like urea and creatinine from the blood, regulates electrolytes, removes excess fluid and helps maintain blood pressure.

But our study found that while dialysis is a medical marvel, it can also have an ironic downside: it could be introducing microplastics into the bloodstream. In some cases, we found that patients undergoing dialysis were being exposed to microplastics during treatment due to the breakdown of plastic components in the equipment – a troubling contradiction for a procedure designed to cleanse the blood.

Apheresis is closely related to dialysis: both involve drawing blood from the body, circulating it through plastic tubing and filters, then returning it – so both procedures carry a similar risk of introducing microplastics from the equipment into the bloodstream.

What are microplastics?

Microplastics are plastic particles that range in size from about 5mm (roughly the length of a grain of rice) down to 0.1 microns – smaller than a red blood cell.

Some microplastics are manufactured deliberately, like the plastic microbeads once common in facial scrubs. Others form when larger plastic objects degrade over time due to sunlight, friction, or physical stress.

They’re everywhere: in the food we eat, air we breathe and water we drink. Plastic packaging, synthetic clothing such as polyester, and even artificial lawns contribute to the spread. Car tyres shed plastic particles as they wear down, and food heated or stored in plastic containers may leach microplastics.

One estimate suggests the average adult may ingest around 883 microplastic particles – over half a microgramme – per day.

So far, large-scale epidemiological studies have not established an association between microplastic exposure and specific diseases. Such studies are needed, but yet to be completed.

However, early research suggests that microplastics may be associated with inflammation, cardiovascular conditions, and DNA damage – a potential pathway to cancer.

What remains unclear is how microplastics behave inside the body: whether they accumulate, how they interact with tissues, and how (or if) the body clears them.

The irony of filtration

It’s tempting to believe, as Bloom seems to, that we can simply “clean” the blood, like draining pasta or purifying drinking water. Just as a sieve filters water from pasta, dialysis machines do filter blood – but using far more complex and delicate systems.

These machines rely on plastic components, including tubes, membranes and filters, which are exposed to sustained pressure and repeated use. Unlike stainless steel, these materials can degrade over time, potentially shedding microplastics directly into the bloodstream.

Currently, there is no published scientific evidence that microplastics can be effectively filtered from human blood. So, claims that dialysis or other treatments can remove them should be viewed with scepticism, especially when the filtration systems themselves are made of plastic.

While it’s tempting to chase quick fixes or celebrity-endorsed cleanses, we are still in the early stages of understanding what microplastics are doing to our bodies – and how to get rid of them. Rather than focusing solely on ways to flush plastics from the bloodstream, the more effective long-term strategy may be reducing our exposure in the first place.

Bloom’s story taps into a growing public unease: we all know we’re carrying the burden of plastic. But addressing it requires more than wellness trends: it calls for rigorous science, tougher regulation, and a shift away from our reliance on plastic in daily life.

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Rosa Busquets receives funding from UKRI, in a UKRI/ Horizons Staff exchanges Clean Water project (101131182). She is honorary Associate Professor at UCL and Honorary Professor at Al-Farabi Kazakh National University. She is panel member of the UNEP EEAP, where is work group lead in a field that includes microplastics. She is also funded by DASA.

Luiza C Campos is a Professor of Environmental Engineering at University College London.

– ref. Orlando Bloom tried to ‘clean’ his blood to get rid of microplastics – here’s what the science says – https://theconversation.com/orlando-bloom-tried-to-clean-his-blood-to-get-rid-of-microplastics-heres-what-the-science-says-261203

Source: ForeignAffairs4

Source: The Conversation – UK – By Cock Van Oosterhout, Professor of Evolutionary Genetics, University of East Anglia

Earth’s biodiversity is in crisis. An imminent “sixth mass extinction” threatens beloved and important wildlife. It also threatens to reduce the amount of genetic diversity – or variation – within species.

This variation in genes within a species is crucial for their ability to adapt to changes in the environment or resist diseases. Genetic variation is therefore crucial for species’ long term survival.

Traditional conservation efforts – such as protected areas, measures to prevent poaching, and captive breeding – remain essential to prevent extinction. But even when these measures succeed in boosting population numbers, they cannot recover genetic diversity that has already been lost. The loss of a unique gene variant can take thousands of years of evolution before it is recovered by a lucky mutation.

In a new paper in Nature Reviews Biodiversity, an international team of geneticists and wildlife biologists argues that the survival of some species will depend on gene editing, along with more traditional conservation actions. Using these advanced genetic tools, like those already revolutionising agriculture and medicine, can give endangered species a boost by adding genetic diversity that isn’t there.

Genetic engineering is not new. Plant breeders have used it for decades to develop crops with traits to boost disease resistance and drought tolerance. Around 13.5% of the world’s arable land grows genetically modified crops. Gene-editing tools such as Crispr are also being used in “de-extinction” projects that aim to recreate extinct animals.

The Dallas-based company Colossal Laboratory & Biosciences has attracted headlines for its efforts to bring back the woolly mammoth, dodo and dire wolf. In de-extinction, the DNA of a living relative species is edited (changed) to approximate the extinct species’ most charismatic traits.

For example, to “resurrect” a woolly mammoth, Colossal’s researchers plan to splice mammoth genes (recovered from ancient remains) into the genome of the Asian elephant to produce a cold-hardy, hairy elephant-mammoth hybrid. Colossal recently engineered grey wolf pups with 20 gene edits from the extinct dire wolf’s DNA.

The “Jurassic Park”-style revival of long-gone creatures has attracted considerable attention and funding, which has accelerated the development of genome engineering techniques. These same genome editing tools can be used for conservation of existing and endangered species. If we can edit a mouse to have mammoth hair, or edit a wolf to resemble a dire wolf, why not edit an endangered bird’s genome to make it more resilient to disease and climate change?

Museum specimens

Using DNA from historical specimens, scientists can identify important genetic variants that a species has lost. Many museums hold century-old skins, bones, or seeds – a genomic time capsule of past diversity. With genome editing, it is possible to reintroduce these lost variants into the wild gene pool.

By restoring genetic variation, species can be fortified against emerging diseases and environmental change. A sharp decline in population numbers is called a “bottleneck”. During a bottleneck, inbreeding and genetic drift lead to the random loss of genetic diversity. Harmful mutations can also increase in frequency. Such “genomic erosion” compromises the health of individuals and can make populations more prone to extinction.

If we can pinpoint a particularly damaging mutation that has become widespread in the population or a variant that has been lost, we could replace it in a few individuals using gene editing. Aided by natural selection, the healthy variant would gradually spread in the population.

If a threatened species lacks genes that it desperately needs to survive new conditions, why not borrow them from a close relative that already has those traits? Known as facilitated adaptation, this could help wildlife cope with threats such as climate change.

In agriculture, such cross-species gene transfers are routine. Tomatoes have been engineered with a mustard plant gene to tolerate cold, and chestnut trees got a wheat gene for disease resistance. There is no reason why such techniques cannot be expanded to animals.

These genetic interventions can complement, but never replace traditional conservation measures. Habitat protection, control of invasive predators, captive breeding programmes, and other on-the-ground action remain absolutely necessary. Importantly, gene editing only makes sense if the target population has recovered in numbers enough (often through conservation), to allow natural selection to do its job.

Measuring the risk of extinction

Gene-edited animals or plants wouldn’t have a chance if released into a barren habitat or a poaching hotspot. Genomic tools can give an extra edge to species that are already being saved from immediate threats, equipping them for adaptive evolution in the future.

Climate zones are shifting, new diseases are spreading, and once-isolated populations are cut off in small fragments of habitat. Without intervention, even intensive habitat management might not prevent a wave of extinctions.

However, a strategy of gene editing also comes with significant risks and unknowns. One technical concern is off-target effects – Crispr and other gene-editing techniques might make unintended DNA changes in addition to the intended edit. In other words, you attempt to insert a disease-resistance gene, but accidentally disrupt another gene in the process. Similarly, a gene may have more than one function, which is known as pleiotropy.

Especially in less-well studied species, we may not be aware of all those functions or pleiotropic effects. Regulatory inertia and public scepticism may also present big obstacles – these issues have historically limited the rollout of genetically modified (GM) organisms, particularly in agriculture.

There are also evolutionary and ecological uncertainties. A deliberate gene edit might have knock-on effects on how the species evolves over time. For instance, if one individual is given a highly beneficial gene that spreads rapidly, it could replace all the other gene variants at that location in the genome (the full complement of DNA in the organism’s cell). This is known as a “selective sweep”, and it inadvertently reduces the genetic diversity in that region of the genome.

Some critics argue that the narrative of a genetic quick fix could distract from the root causes of biodiversity loss. If people believe we can simply “edit” a species to save it, will that undermine the urgency to protect habitats or cut carbon emissions? Portraying extinction as reversible might seed false hope and reduce the motivation for tough environmental action.

Conservation efforts, strong environmental policies and legal protections remain indispensable. So do habitat restoration, climate action and reducing the impact made on the environment by humans.

Nevertheless, genome engineering is a new tool in the conservation toolbox. It’s one that –given the right assistance and environmental encouragement – can help save species from extinction.

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Cock Van Oosterhout receives funding from the Royal Society for conservation genomics work on threatened bird species in Mauritius, and a donation by the Colossal Foundation for conservation genomic research on the pink pigeon. He is member of the Conservation Genetics Specialist Group of the IUCN (International Union for Conservation of Nature).

– ref. Gene editing technology could be used to save species on the brink of extinction – https://theconversation.com/gene-editing-technology-could-be-used-to-save-species-on-the-brink-of-extinction-261419

Source: ForeignAffairs4

Source: The Conversation – UK – By Luca Trenta, Associate Professor in International Relations, Swansea University

Tonya Ugoretz, a top FBI intelligence analyst, was placed on administrative leave in June. The FBI has not said why. But the decision came around the time she refused to endorse what was reportedly a thinly sourced report accusing China of interfering in the 2020 US presidential election in favour of Joe Biden.

At the Bureau, loyalty tests and polygraph checks have also allegedly become routine as part of a crackdown on news leaks. When approached by the New York Times about the matter, the FBI declined to comment and cited “personnel matters and internal deliberations”.

The situation does not seem to be much different at the CIA. In May, agency director John Ratcliffe ordered a review of the intelligence community’s earlier conclusion that Russia had interfered in the 2016 presidential campaign on behalf of Donald Trump. The conclusion, Ratcliffe contends, was unwarranted and imposed by political pressure – a claim that has been rejected by one of the report’s leading authors.

The intelligence community has reportedly also been under pressure to substantiate Trump’s claims that the recent military strikes on Iran had obliterated its nuclear sites. This is despite mixed evidence regarding the extent of their success. These examples suggest a growing politicisation of intelligence and national security in the US.

Researchers and observers have highlighted the detrimental effect of this process. When intelligence is conducted by ideologues that are screened for loyalty, it often becomes more about pleasing the leader than collecting accurate information and preventing failure.

Less attention has been paid to the permissive attitude of Congress. Many Republicans in Congress have taken an unquestioning attitude toward the claims made by the president and other officials, allowing intelligence agencies to pursue Trump’s agenda unimpeded.

While Trump and Patel’s focus on personal loyalty when it comes to intelligence is new, partisan influence in congressional oversight is not. In fact, Congress has a long history of supporting the intelligence priorities of the governing administration.

For much of the cold war, Congress was not involved – and did not want to be involved – in matters of intelligence. This view was expressed by former CIA legal counsel, Walter Pforzheimer, during an interview in 1988. Reflecting on the early days of oversight, he stated: “It wasn’t that we were attempting to hide anything. Our main problem was we couldn’t get them [Congress] to sit still and listen.”

This quote isn’t entirely true. In research from 2023, I showed that Congress was more involved than was generally believed. The US-backed 1954 coup in Guatemala, which deposed the democratically elected president, Jacobo Árbenz, is a case in point. Leading members of Congress were “in the know” and others pushed Dwight Eisenhower’s administration to be even more aggressive.

But Congress took on a more active role in intelligence matters in the 1970s. Following a series of public revelations about the CIA’s behaviour, a select committee was established in 1975 and exposed abuses by intelligence agencies including the surveillance of US citizens, experiments with drugs and involvement in assassinations.

In the wake of this, Congress established intelligence committees with oversight duties. The idea was that the CIA would present a document signed by the president to notify congressional committees of its intentions.

However, the system ran into trouble in the 1980s, and partisanship and politicisation were part of the story. The Ronald Reagan administration’s support for the “contra” rebels in Nicaragua made intelligence a matter of severe partisan conflict.

Removing Nicaragua’s government

When Reagan took office in 1981, one of the primary foreign policy priorities for his administration was removing the Sandinista National Liberation Front from power in Nicaragua. The administration saw the Sandinistas as a threat to the region and – in Reagan’s black-and-white thinking – as puppets of Communist Moscow and Havana.

The administration sought to convince Congress that its aims were limited. The aim, or so CIA director William Casey told the intelligence committees, was to obstruct the transfer of weapons from Nicaragua to neighbouring El Salvador. Another left-wing guerrilla movement, the Farabundo Martí National Liberation Front, was threatening the US-supported government there.

Initially, the policy received bipartisan support in Congress. The linchpin of this policy was the creation of an insurgent group in Nicaragua called the contras (contrarevolucionarios). It was made up of members of the previous regime’s brutal national guard, as well as other groups that had become disgruntled with the Sandinistas.

News stories soon made clear that the size of the contra army had radically expanded, from the 500 members discussed by Casey in his initial briefing to thousands. The contras’ stated goal of overthrowing the Sandinistas, which they ultimately failed to do, also contradicted the earlier Reagan administration’s statements to Congress.

Democrats in Congress pushed the leadership of intelligence committees to curtail the administration’s activities. Edward Boland, chairman of the House Intelligence Committee, penned and helped to pass two amendments. The first prohibited any US government support for the purpose of overthrowing the Nicaraguan government.

When the administration found loopholes to circumvent this, Boland’s second amendment prohibited any US funds from being spent in support of the contras. This amendment is generally understood as a first step towards the so-called Iran-Contra scandal.

The Reagan administration illegally funded the contras behind Congress’s back by using the proceeds from secret arms sales to Iran – a state the US had been at loggerheads with since the 1979 Islamic revolution.

The Boland amendments also helped make an intelligence and covert operations issue a matter of public debate and – more importantly – congressional votes. Republicans in Congress abandoned their oversight duties and followed the administration’s guidelines.

Votes on contra aid became an opportunity for partisan controversy, vitriolic attacks, accusations of betrayal and large-scale influence campaigns. Instead of oversight, a deep partisan divide materialised.

Counting on Congress? Think again

The role of Congress is to conduct oversight. It is the role of the governing administration to keep Congress informed of intelligence matters, particularly covert operations. History shows this has often been hard to achieve.

Congress has been complacent, complicit and often too willing to follow the government’s lead. In some cases, Congress has acted but primarily in the aftermath of major scandals or media revelations. This is called “firefighting” behaviour.

But “firefighters” seem to now be in short supply. As much as domestic constraints on Trump’s power are decreasing, the same is happening in the context of intelligence and foreign policy.

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Luca Trenta received funding from British Academy Grant SRG21211237.

– ref. Congress has a chequered history of overseeing US intelligence and national security – https://theconversation.com/congress-has-a-chequered-history-of-overseeing-us-intelligence-and-national-security-261120