Category: English

Source: The Conversation – Global Perspectives – By Peter Newman, Professor of Sustainability, Curtin University

Some 15 people have died after the Gloria funicular railway car in Lisbon, Portugal, derailed and crashed on Wednesday local time.

Emergency services have also confirmed that more than 18 people were also injured, five of them seriously, in the tragedy, which occurred at the start of the evening rush hour.

It follows another accident on the same line in May 2018, when one of the cars derailed due to flaws in the maintenance of its wheels. No one was killed in that incident.

The exact cause of the most recent accident is not yet known. Witnesses have reported that the yellow-and-white tram appeared out of control as it sped downhill, before derailing as it rounded a bend and crashing into a building. Photos of the aftermath show a crumpled heap of cables and steel.

These cable car–like transport systems are rare relics of the 19th century, found in only a few very hilly places around the world. So how do they work? And why are they still in use?

How do funicular railways work?

Trains and trams typically only work on flat terrain. That’s because their steel wheels can’t get enough traction on steel rails on steep hills. As a workaround, railway engineers often build tunnels through steep mountainsides.

Funicular railways, however, can go up very steep hills.

They usually feature two counterbalanced cars that are attached via a haulage cable.

As one car descends, it helps pull the ascending car up the hillside. The weight of the ascending car also prevents the descending one from careening out of control. Some now have electric motors to help power them and some are able to engage a one-way mechanical drive just for steep hills.

Even though funicular systems are typically quite slow and clunky, they are still popular with both tourists and residents in the places where they’re found.

Where are they found?

The Gloria funicular railway line in Lisbon opened in 1885. One of three funicular lines in Lisbon, it connects the city’s downtown area with the Bairro Alto (Upper Quarter).

But there are other examples of these transport relics around the world.

Switzerland has several funicular railways. The most notable is the Stoosbahn – the steepest funicular in the world. It covers a total ascent of around 744 metres, reaching a gradient of 47 degrees. It is a very popular tourist trip.

In Hong Kong, the Peak Tram is a funicular railway that has operated since 1888 and takes people to near the top of Hong Kong Island.

Last year, there was also some discussion about installing a new funicular railway system in the Blue Mountains in New South Wales, Australia, that would travel 14 metres every second.

The rise of trackless trams

Funicular railways still serve a purpose for people living in – or visiting – steep areas where they’re found. However, newer technology means more conventional forms of rail transport are now far less limited in travelling up and down hills.

For example, trackless trams are kind of a combination between a tram and a bus. They use GPS and digital sensors to move precisely along an invisible track and have rubber wheels, enabling them to ascend gradients of up to 15%. However, these have not yet been built for steeper hills.

I have enjoyed riding such funicular trams in a range of hilly cities, but this crash is likely to take the shine off the tourist experience. It’s about time we had a 21st-century option that is clearly safer.

Peter Newman receives funding from the CRC RACE.

– ref. Tragedy has struck Lisbon’s funicular railway. A transport expert explains how these old-fashioned trains work – https://theconversation.com/tragedy-has-struck-lisbons-funicular-railway-a-transport-expert-explains-how-these-old-fashioned-trains-work-264574

Source: The Conversation – Global Perspectives – By Rob Nicholls, Senior Research Associate in Media and Communications, University of Sydney

Google will not have to sell its Chrome web browser in order to fix its illegal monopoly in the online search business, a United States federal judge has ruled. It will, however, need to do a few other things, such as sharing data with rival companies, in order to improve competition.

The remedies ruling was handed down by DC District Court Judge Amit Mehta, who last year found Google had violated antitrust laws in relation to its online search business.

This was not the worst-case scenario for Google, and the share price of its parent Alphabet rose 8% after the news. But the ruling could still have a significant impact on the tech giant – and the entire internet.

What was the case actually about?

The US Department of Justice (DOJ) filed its antitrust suit against Google in 2020, arguing the tech giant had used exclusive agreements with device makers such as Apple and Samsung to unfairly box out competitors from the search engine market.

For years, Google accounted for reportedly 90% of all search queries in the US, using what the DOJ called “anticompetitive tactics” to maintain and extend its monopolies in search and search advertising.

In August 2024, Judge Mehta ruled in the DOJ’s favour, finding Google had maintained an illegal monopoly.

The case centred on Google’s practice of entering into exclusionary agreements that collectively locked up the primary avenues through which users access online search, making Google the pre-set default general search engine on billions of mobile devices and computers – and particularly on Apple devices.

The remedies – proposed and actual

The DOJ urged the sell-off of the Chrome browser and possibly its Android operating system, and the sharing of search data. It said these remedies would limit Google’s ability to monopolise the search market and prevent it from gaining an unfair advantage in other markets, notably artificial intelligence (AI).

The DOJ also demanded an end to its multibillion-dollar agreements with Apple and other partners.

Judge Mehta’s remedies ruling fell significantly short of the DOJ’s harshest demands.

Under the remedies ordered, Google will be barred from entering or maintaining exclusive contracts relating to the distribution of Google Search, Chrome, Google Assistant, and the AI-powered Gemini app.

Google cannot enter agreements that condition the licensing of any Google application on the distribution or placement of these products, or condition revenue share payments on maintaining these products on any device for more than one year.

Google must also provide competitors with access to its search results and advertising services at standard rates. This will help them to deliver quality search results to their own users while building their own technology.

However, Google will not be barred from paying device makers to preload its products, including Google Search and generative AI products.

A technical committee will be established to help enforce the final judgment, which will last six years and go into effect 60 days after entry. Judge Mehta ordered the parties to meet by September 10 for the final judgment.

Shortly after the judge’s ruling, Google released a statement reiterating its opposition to the initial ruling in August 2024, which it still plans to appeal.

Today’s decision recognises how much the industry has changed through the advent of AI, which is giving people so many more ways to find information. This underlines what we’ve been saying since this case was filed in 2020: competition is intense and people can easily choose the services they want.

More cases to come

This decision opens up competition in the search market while allowing Google to maintain its core business structure. The data-sharing requirements could particularly benefit AI competitors who need large datasets to train their models.

Google faces additional antitrust pressure beyond this search case. In April 2025, US District Judge Leonie Brinkema found Google illegally monopolised advertising technology markets. The remedies trial for that case is scheduled for later this month.

As William Kovacic, a global competition law professor at George Washington University and former Federal Trade Commission commissioner, told TechCrunch:

We’ve never had a circumstance in which the Department of Justice has had two largely parallel cases involving major elements of alleged misconduct against the same dominant firm with two parallel remedy processes going ahead.

Google’s competitors, however, believe the remedies should have been more severe in this case.

In a statement, Gabriel Weinberg, the chief executive of search engine competitor DuckDuckGo, claimed Google “will still be allowed to continue to use its monopoly to hold back competitors, including in AI search”. He also called on the US congress to step in “to swiftly make Google do the thing it fears the most: compete on a level playing field”.

It seems likely the DOJ will need to demonstrate abuse of dominance in the AI search field in order to get a remedy that will satisfy DuckDuckGo.

The full resolution of these cases likely won’t occur until late 2027 or early 2028, as Google has indicated it will appeal both the liability and remedy decisions.

Rob Nicholls receives funding from the Australian Research Council.

– ref. Google just dodged a major penalty in the courts – here’s what happens next – https://theconversation.com/google-just-dodged-a-major-penalty-in-the-courts-heres-what-happens-next-264473

Source: The Conversation – Global Perspectives – By Vincent Ho, Associate Professor and Clinical Academic Gastroenterologist, Western Sydney University

Many of us are guilty of scrolling our smartphones on the toilet. But a new study from the United States, published today, has found this habit may increase your risk of developing haemorrhoids by up to 46%.

So, what’s the link? How can time on your phone lead to these painful lumps in and around your anus? Here’s what we know.

What are haemorrhoids?

Every healthy person has haemorrhoids, sometimes called piles. They are columns of cushioned tissue and blood vessels found close to the opening of the anus.

Haemorrhoids have a really important role in maintaining bowel continence or, to put it simply, keeping your poo in.

When all is well, we don’t notice them. But haemorrhoids can get swollen and this can lead to symptoms such as pain, bleeding or feeling a lump just inside your anus (internal haemorrhoids) or protruding outside (external haemorrhoids).

So when someone “has haemorrhoids”, it means they have become inflamed or symptomatic.

This is extremely common: more than one in two of us will experience symptomatic haemorrhoids at some point in our lives.

You are more likely to get haemorrhoids if you:

• are older (over 45)
• are pregnant
• are overweight
• have persistent constipation or diarrhoea
• regularly lift heavy objects
• spend a lot of time on the toilet.

The link between toilet time and haemorrhoids

Prolonged sitting in general has not been linked to developing haemorrhoids.

However, a standard toilet seat – unlike a chair or couch – has a large internal opening that provides no support for the pelvic floor (the group of muscles and ligaments that support the bladder, bowel and uterus).

Prolonged sitting on a toilet seat is believed to increase pressure inside the pelvic floor and lead to blood pooling in the vascular cushions of the anus. This makes haemorrhoids more likely to develop.

What the new study looked at

The new US study recruited 125 adults, aged 45 and older, who were undergoing a colonoscopy at Beth Israel Deaconess Medical centre.

Researchers surveyed them about their smartphone habits while using the toilet, including how often they checked their phone and for how long. Participants also reported on other behaviours such as straining, their fibre intake, and how much physical activity they did.

The researchers recorded whether they had haemorrhoids. Since the participants were all having a colonoscopy, the presence of internal haemorrhoids could be directly confirmed visually.

What did the study show?

Two-thirds (66%) of all participants used smartphones while on the toilet. The most common activity was reading news (54.3%), followed by social media (44.4%).

Those who used their smartphones spent longer on the toilet than those who didn’t. More than one in three (37.3%) toilet smartphone users spent over five minutes on the toilet, compared to just over one in 20 (7%) of those who didn’t use their smartphones.

The smartphone users had a 46% higher risk of haemorrhoids, compared to those who didn’t use their smartphone. To calculate this, researchers took into account other known risk factors for haemorrhoids such as gender, age, body mass index, exercise activity, straining and fibre intake.

However, unlike some other research, this study did not find a link between straining and haemorrhoids.

As a result, the researchers concluded that time spent on the toilet poses a more significant risk for haemorrhoids than straining. However, we can’t rule out straining as a risk factor, based on one study.

Some other limitations to consider

The study relied on participants remembering whether or not they strained, and how long they spent on the toilet.

This kind of recall is subjective, and may also be influenced by taking part in the study. For example, if the participants thought they had haemorrhoids, they may be more likely to report straining.

The study’s small sample size and the participants’ age (all over 45) also mean it is unlikely to be representative of the broader population.

Toilet sitting time

The new study is not the first to study the link between time spent on the toilet and developing haemorrhoids. In 2020, a Turkish study found spending more than five minutes on the toilet was associated with haemorrhoids.

Another 2020 study from Italy of 52 people with diagnosed internal or external haemorrhoids noted the longer they spent on the toilet, the more severe their haemorrhoids.

---

Read more:
Do men really take longer to poo?

---

So, what are we doing on the toilet?

Defaecation itself usually doesn’t take long. One study found it took healthy adults an average two minutes when sitting, but only 51 seconds when squatting.

The majority of “toilet sitting time” usually means just that – sitting on the toilet, doing other activities aside from pooing (or weeing).

One 2008 study from Israel surveyed 500 adults and found more than half (52.7%) read books or newspapers while on the toilet. It also found toilet readers spent significantly more time on the toilet.

How to avoid haemorrhoids

The usual advice is to increase the amount of fibre in your diet (eating more fruit, vegetables and wholegrains) and ensure you drink enough water. This makes it easier to pass a stool and reduces straining – which you should also try to avoid.

However, the new research confirms previous evidence that cutting down toilet sitting time may also help. So, avoiding distractions by leaving your smartphone outside the bathroom is a good idea (and as a bonus, will expose your device to fewer germs).

---

Read more:
Your phone is covered in germs: a tech expert explains how to clean it without doing damage

---

If you have any concerning symptoms, such as blood in your stool, a new lump in the anal region, or pain when passing a bowel motion then you should see your local doctor for further investigations and treatment.

Vincent Ho 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. Scrolling on the toilet increases your risk of haemorrhoids, new study shows – https://theconversation.com/scrolling-on-the-toilet-increases-your-risk-of-haemorrhoids-new-study-shows-264107

Source: The Conversation – Global Perspectives – By Theresa Larkin, Associate Professor of Medical Sciences, University of Wollongong

Most of us can hold our breath for between 30 and 90 seconds.

A few minutes without oxygen can be fatal, so we have an involuntary reflex to breathe.

But freediver Vitomir Maričić recently held his breath for a new world record of 29 minutes and three seconds, lying on the bottom of a 3-metre-deep pool in Croatia.

This is about five minutes longer than the previous world record set in 2021 by another Croatian freediver, Budimir Šobat.

Interestingly, all world records for breath holds are by freedivers, who are essentially professional breath-holders.
They do extensive physical and mental training to hold their breath under water for long periods of time.

So how do freedivers delay a basic human survival response and how was Maričić able to hold his breath about 60 times longer than most people?

Increased lung volumes and oxygen storage

Freedivers do cardiovascular training – physical activity that increases your heart rate, breathing and overall blood flow for a sustained period – and breathwork to increase how much air (and therefore oxygen) they can store in their lungs.

This includes exercise such as swimming, jogging or cycling, and training their diaphragm, the main muscle of breathing.

Diaphragmatic breathing and cardiovascular exercise train the lungs to expand to a larger volume and hold more air.

This means the lungs can store more oxygen and sustain a longer breath hold.

Freedivers can also control their diaphragm and throat muscles to move the stored oxygen from their lungs to their airways. This maximises oxygen uptake into the blood to travel to other parts of the body.

To increase the oxygen in his lungs even more before his world record breath-hold, Maričić inhaled pure (100%) oxygen for ten minutes.

This gave Maričić a larger store of oxygen than if he breathed normal air, which is only about 21% oxygen.

This is classified as an oxygen-assisted breath-hold in the Guiness Book of World Records.

Even without extra pure oxygen, Maričić can hold his breath for 10 minutes and 8 seconds.

Resisting the reflex to take another breath

Oxygen is essential for all our cells to function and survive. But it is high carbon dioxide, not low oxygen that causes the involuntary reflex to breathe.

When cells use oxygen, they produce carbon dioxide, a damaging waste product.

Carbon dioxide can only be removed from our body by breathing it out.

When we hold our breath, the brain senses the build-up in carbon dioxide and triggers us to breathe again.

Freedivers practice holding their breath to desensitise their brains to high carbon dioxide and eventually low oxygen. This delays the involuntary reflex to breathe again.

When someone holds their breath beyond this, they reach a “physiological break-point”. This is when their diaphragm involuntarily contracts to force a breath.

This is physically challenging and only elite freedivers who have learnt to control their diaphragm can continue to hold their breath past this point.

Indeed, Maričić said that holding his breath longer:

got worse and worse physically, especially for my diaphragm, because of the contractions. But mentally I knew I wasn’t going to give up.

Mental focus and control is essential

Those who freedive believe it is not only physical but also a mental discipline.

Freedivers train to manage fear and anxiety and maintain a calm mental state. They practice relaxation techniques such as meditation, breath awareness and mindfulness.

Interestingly, Maričić said:

after the 20-minute mark, everything became easier, at least mentally.

Reduced mental and physical activity, reflected in a very low heart rate, reduces how much oxygen is needed. This makes the stored oxygen last longer.

That is why Maričić achieved this record lying still on the bottom of a pool.

Don’t try this at home

Beyond competitive breath-hold sports, many other people train to hold their breath for recreational hunting and gathering.

For example, ama divers who collect pearls in Japan, and Haenyeo divers from South Korea who harvest seafood.

But there are risks of breath holding.

Maričić described his world record as:

a very advanced stunt done after years of professional training and should not be attempted without proper guidance and safety.

Indeed, both high carbon dioxide and a lack of oxygen can quickly lead to loss of consciousness.

Breathing in pure oxygen can cause acute oxygen toxicity due to free radicals, which are highly reactive chemicals that can damage cells.

Unless you’re trained in breath holding, it’s best to leave this to the professionals.

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

– ref. The science behind a freediver’s 29-minute breath hold world record – https://theconversation.com/the-science-behind-a-freedivers-29-minute-breath-hold-world-record-264020