Playgrounds can host a variety of natural wonders – and, of course, kids! Now some students are not just learning about insects and spiders at school — they are putting them on the map and even discovering and naming new species.

Studies indicate insect populations are declining, and species are going extinct every week in Australia. But scientists have only described about a third of Australia’s estimated total of insect species.

This means around 150,000 of our insect species do not have formal scientific names. We know little about where they are and what they do in ecosystems — vital information for stopping biodiversity loss.

So, our team developed the citizen science project Insect Investigators.

We took scientists to 50 regional schools across three states to learn about insects and other arthropods such as spiders. Students of all ages got to survey insect diversity, search for new species, and engage with entomologists and taxonomists throughout the school year.

Students helped name new species, including several species of parasitoid wasp.

Some of the scientific names include Apanteles darthvaderi (Back Plains State School students thought the wasp had gone to the “dark side” because of the way the wasp “sucks the life out of caterpillars”), Mirax supremus (named after the pinnacle science class at Beerwah State High School), and Coccygidium mellosiheroine, which means “honey-coloured hero” (named by students collaborating from several Queensland schools, who considered the wasp a hero as it attacks a crop pest).

Our latest paper on the project is now published. We learned hands-on citizen science increased students’ interests in insects, nature and science.

How many insects?

Around 1,800 students and more than 70 teachers collected insects in or near their schools.

Teachers sent samples to the project team, which sorted and sent a selection of specimens to be DNA barcoded. This method involves sequencing a small section of the genome to tell different species apart.

The specimens were then sent to experts around Australia, who are working to describe any new species collected.

The students collected more than 12,000 insect specimens, including 5,465 different species – many of which are probably not described.

It will take years to identify all the species and work out how many are new to science, but we already know 3,000 had not been recorded in the Barcode of Life DNA database (BOLD).

Good for insects, good for learning

Getting to know insects as part of this citizen science project was great for kids’ active learning and developing an appreciation of the natural world.

Students said they felt more interested in insects, nature and science, and it inspired them to spend more time outdoors.

“I learnt there are many insect and plant species… that I haven’t seen before and how in different ecosystems you can find different insects,” said a student from South Australia.

When students are engaged, it’s no surprise teachers enjoy their jobs more too — and this is exactly what we found. The more enthusiastic the students were about nature and science experiences through the project, the more interested the teachers were in teaching these topics.

One teacher reported “students gained an understanding of the work of scientists, how to participate in research, protocols to follow, and gained a huge interest in insects!”

What did students get out of it?

After the insect survey was completed, we asked 118 students and 22 teachers in nine of the schools about what they experienced, and how they see insects and nature now.

Students said the chance to find a new species, as well as discovering and catching insects they had not seen before, were highlights of Insect Investigators.

Experiencing a hands-on learning style, outside in nature, was also mentioned as a benefit of the program.

Many students said they now wanted to spend more time outdoors, act and encourage others to protect nature, and pay more attention to insect conservation and science classes. This implies the experience and discovery associated with hands-on citizen science has motivated greater engagement with nature and science.

The potential of school-based citizen science

Insect surveys offer an accessible way for students to actively learn about science and nature. Insects are virtually everywhere and by photographing them, students can observe natural insect behaviour – without the need to collect them.

The iNaturalist App and Atlas of Living Australia facilitate citizen scientists to explore nature around them. We’ve also created resources for teachers who want to introduce lessons on insects into their school homepage.

It’s never too early to develop science literacy skills and give children the chance to develop their curiosity, critical thinking and problem solving.

Connecting schools and scientists is a great way to engage young learners and foster connections to nature. It has the added bonus of inventorying our natural world which is vital to conserving Australia’s biodiversity.

Andy G Howe, Research Fellow (Entomology), University of the Sunshine Coast; Erinn Fagan-Jeffries, Wasp biodiversity group leader, University of Adelaide; Patrick O'Connor, Professor in Natural Resource Economics, University of Adelaide, and Trang Nguyen, Postdoctoral Research Fellow, University of Adelaide

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Two windswept beaches 80km south of Adelaide have been closed to the public after locals reported “more than 100” surfers fell ill on the weekend. Their symptoms included “a sore throat, dry cough and irritated eyes” or blurred vision. Dead sea dragons, fish and octopuses have also washed up on the beaches.

Water samples have been taken for testing and health authorities suspect toxins from an algal bloom may be to blame.

But the “mysterious foam” in the water is a health hazard in its own right.

My research shows people should not go in the sea when it is foaming. These bacterial smoothies can contain more harmful pathogens than a sewage treatment plant – and you wouldn’t go swimming in sewage.

Beware of sea foam

Sea foam doesn’t look dangerous. But looks can be deceiving. This foam is likely to contain a mixture of many different types of microbes and pollutants.

On beaches with lots of sea foam, people should avoid all contact with the water – and definitely avoid surfing or breathing in the contaminated water droplets in the air.

I have been studying sea foams since 2003. In 2021, my PhD student Luke Wright and I published research on our discovery of infectious disease-causing microbes in the sea foams of the Sunshine Coast in Queensland.

Named Nocardiae, these microbes are filamentous bacteria that can cause foaming in wastewater treatment plants, particularly when there’s a high load of fats, oils and greases. We now know the bacteria can cause foaming in the sea too.

We detected 32 strains of Nocardiae in samples of sea foam from beaches at Noosa and south to Caloundra.

Some of these species were new to science. So we named them Nocardia australiensis and Nocardia spumea (“spumea” meaning froth or foam).

Nocardiae bacteria are known to cause skin, lung and central nervous system infections in both humans and animals. But the infection usually only takes hold in people with weakened immune systems. The bacteria can cause abscesses in the brain, lungs and liver.

The incubation time can range between one and six months, depending on the strain of bacteria and the health status of the person involved.

This means it will take some time for people to get infected and show symptoms. Long-term medical monitoring is required to detect the condition, as it can be masked by other disease-causing microbes such as the infectious agent that causes tuberculosis.

Where is the sea foam coming from?

During heavy winds, microbial spores from the soil can end up on the surface of the ocean.

If the water is polluted with floating fats and grease as well as asphaltene, motor oil and hydrocarbons, these spores soon form bacterial colonies or biofilms that go forth and multiply.

That’s because these microbes use pollution as a food source. Seawater is increasingly polluted by runoff from farmland or hard surfaces such as roads. Everything washed into the stormwater drains out to sea. During heavy storms accidental overflow from sewage systems can also occur, as Rockhampton has experienced in the past.

Algae is another food source for these microbes, as they can crack open algae cells to access the nutritious oils inside. Sea foams have been observed in northern France during algal blooms.

Warm water makes matters worse, as the warmth increases the survival rate for Nocardiae. In our laboratory on the Sunshine Coast, we were able to replicate a foaming event. We found foaming started at water temperatures of 24°C and above.

What can be done about it?

Reducing stormwater pollution will reduce the growth of sea foams. Any potential incident of infections of these surfers can raise awareness of the problem.

But sea foam can also be found in pristine environments such as national parks, where it is mostly due to oils leached from trees. We proved this fact at Noosa National Park.

In my experience on the Sunshine Coast, the council and other local authorities have been very receptive to advice on how to fix the problem. They have supported our research and also completed major upgrades at sewage treatment plants over the last 20 years.

Once there’s an outbreak in the environment it is very difficult to control. That’s because ocean is an open system, as opposed to the closed system of a sewage treatment plant, where operators can use special chemicals or mechanical equipment to break the foam down. In open sea it’s impossible. So we just have to wait for it to go away.

In this case, teams of researchers from different disciplines should come together to explore the issue. Microbiologists, marine scientists, meteorologists and chemists should team up to find out what’s going on. Ocean currents should be followed to determine where the pollutants end up.

Sea foam is a global issue

Earlier this month Tropical Cyclone Alfred whipped up sea foam all the way along the coast from South East Queensland to northern New South Wales. I was horrified to see footage of people playing in the thick, sticky sea foam, blissfully unaware of the dangers.

But the problem is not confined to Australia, sea foam can be found at polluted beaches all over the world. Examples include India and Turkey.

I have been telling this story ever since I first observed it on the Sunshine Coast in 2003. Every time there’s a major sea foam event, the media is interested. But research support is also needed in the gaps in between. We scientists need to monitor the shorelines continuously.

As long as humanity continues to produce pollution, the problem will increase. It will also worsen as the world warms, because sea foams like it hot.

Ipek Kurtböke, Associate Professor in Microbiology, University of the Sunshine Coast

This article is republished from The Conversation under a Creative Commons license. Read the original article.

More than 8,000 continental islands sit just off the coast of Australia, many of them uninhabited and unspoiled. For thousands of species, these patches of habitat offer refuge from the threats they face on the mainland.

Coastal islands are also a valuable resource for ecologists studying how communities of plants colonise new habitats and change over time.

Now, we have created a new publicly available database known as A-Islands, which draws on decades of plant surveys (where botanists visit a particular location and record the plants found there).

This unique collection of surveys draws on data about more than 6,500 plant species from over 850 islands. Some vast islands stretched for kilometres, while others were as small as a tiny apartment.

Our new research, published in the Journal of Vegetation Science, provides new insights into how Australia’s coastal islands have changed over time, and can help with plant monitoring and conservation efforts as the climate warms.

Scaling steep cliffs, jumping from helicopters

We built A-Islands by painstakingly digitising plant surveys from old books and records, and speaking with botanists and organisations all over Australia.

A-Islands is made up of 1,350 island botanical surveys dating back to the 1940s, from over 135 different sources. We are still adding more.

The stories of how the data was collected were fascinating. In some cases, people camped on islands for weeks, making sure they’d recorded every living organism they could.

Some scaled steep cliffs from small boats or even jumped from helicopters to access remote islands, and record the plants they found there.

Australia’s islands punch above their weight

As we collated the surveys, we realised Australia’s coastal islands were punching above their weight for species diversity.

Despite making up less than 1% of Australia’s land area, at least 25% of Australia’s plant species inhabit these coastal islands.

These islands’ climates are almost as diverse, spanning coral atolls in tropical north Queensland to the cold and windswept rocky isles off the southern tip of Tasmania.

While some species of plants have colonised hundreds of Australian islands, most inhabit just a few isles.

These plant communities are the backbone of island ecosystems and provide havens for many endangered animals.

A rare resource for scientists

Many of the islands featured in A-Islands have been surveyed more than once over the last 100 years.

Most data in the ecological sciences tends to provide a snapshot in time of the species that might be at a location.

In contrast, A-Islands can tell us how the plant communities have changed over decades.

This is surprisingly rare in ecological studies but essential if scientists are to predict vegetation changes in the future as the climate changes.

A new idea

Many people think of plant communities as static and unchanging.

However, A-Islands shows that on these small coastal islands, mainland species are migrating to the island, persisting for a time, and then going extinct and being replaced by other species.

This concept of species constantly changing at a particular location is called species turnover. In theory, the types of species in an island community will change over time but the number of species remains, on average, the same over the long term.

The data in A-Islands not only confirms this has happened at an unprecedented number of archipelagos, but also suggests a new idea: some types of species “turnover” faster than others.

Species like grasses and small herbs tend to come and go from islands more frequently than longer lived taller species.

Islands can be climate refuges

Data sets such as A-Islands will become even more essential as the climate changes. Islands are at the forefront of biodiversity loss, and over half of the known global plant extinctions have occurred on islands.

Uncovering these underlying trends in species community change will be crucial for predicting how plant communities everywhere respond to climate change over the coming centuries.

These islands will be important climate refuges, buffered from the hottest temperatures by the surrounding ocean and protected from mainland pressures. They will be vital plant habitats in the future.

The A-Islands dataset forms a crucial baseline for defining what species have inhabited our pristine island environments over time.

It can also help scientists work out where to prioritise surveys they’ll need to do as the climate changes.

David Coleman, Post-doctoral Researcher in Plant Ecology, Macquarie University and Julian Schrader, Lecturer in Plant Ecology, Macquarie University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

There is something special about sharing baked goods with family, friends and colleagues. But I’ll never forget the disappointment of serving my colleagues rhubarb muffins that had failed to rise. They were dense, rubbery and an embarrassment to the reputation of chemists as good cooks (#ChemistsWhoCook feeds on social media are full of delicious food).

The cause of my failure was an imbalance between the acidity of rhubarb and the chemical raising agents I used in baking.

Both baking powder and baking soda can play a role in giving baked goods their bubble-filled texture and taste. They are sold side-by-side in the supermarket, and have similar uses. But what’s the difference between them and how can we use those differences to our advantage?

What’s in the box?

A quick look at the packaging shows the difference between the two products.

Baking soda contains one ingredient: sodium hydrogen carbonate, also known as sodium bicarbonate or simply bicarb. Baking soda is well known for its uses in cleaning, cooking and deodorising.

Baking powder is typically a mixture of three ingredients: baking soda, an acid, and a starch derived from corn, rice or wheat. The starch makes it easier to measure the powder and also prevents the acid and base from reacting prematurely in the pantry. Baking powder is used exclusively for cooking.

The common ingredient in both products is the baking soda. This salt can be purified from natural sources, or can be prepared synthetically.

The acid is the key

Baking soda is a base, which means it can chemically react with acids. This fizzy reaction produces bubbles of carbon dioxide, water and a mix of new salts. Baking soda can also release carbon dioxide gas when it is heated at temperatures above 80°C.

When you mix baking soda into a cake batter, you will see some initial chemical activation by food acids. This causes bubbles to form and the mixture to rise.

The acids come from other ingredients in the mix, such as yogurt, buttermilk, or the rhubarb in my failed muffins. Too much acid, and the majority of the carbon dioxide will be released at this batter stage.

Once you place the mixture in the hot oven, the high temperature will form further carbon dioxide bubbles. This thermal activation forms a new salt, sodium carbonate, which can give a residual taste and “soapy” mouthfeel if there’s too much of it left in the final product.

Mixing baking powder into a cake batter will also result in chemical activation to form bubbles. The baking soda in the mixture will react with the acid included in the baking powder mix, as well as any acidic ingredients in the batter.

The type of acid included in the baking powder can subtly change the way the baking powder behaves. The more soluble the acid in the batter, the faster the carbon dioxide will form bubbles.

Recipes that ask for both baking powder and baking soda are likely looking to do two things: neutralise an abundance of food acid from another ingredient, and provide time-delayed, temperature-activated rising.

Baking soda can also increase the surface browning of food by enhancing the Maillard reaction. This class of reactions results in delicious chemical transformations in roasted coffee, seared steaks, baked bread and more.

Meanwhile an excess of baking soda can change the appearance of foods, for example turning blueberry anthocyanins green in muffins or pancakes.

Can I substitute baking powder and baking soda?

Baking (like chemistry) is a precise science. It’s best not to substitute baking soda for baking powder or vice-versa: they have subtly different chemical effects.

If you really need a substitution, the general rule is that you need three times the baking powder for the equivalent quantity of baking soda (so, if the recipe asks for a teaspoon of baking soda, you’d add three teaspoons of baking powder).

But it’s not a precise conversion: it doesn’t take into account the key role of acid that’s already in the baking powder. This could affect the final acid-base balance in your recipe.

You can compensate by adding an acid such as cream of tartar or citric acid. But it can be difficult to get the relative quantities of acid and base correct. These acids are also likely to promote immediate release of carbon dioxide, with less left to activate in the oven – potentially leading to a dense bake.

You definitely shouldn’t substitute baking powder for baking soda when cleaning. The acid in the baking powder will neutralise any cleaning activity of the sodium bicarbonate, while the starch may leave a sticky, streaky mess.

It’s best to keep both baking powder and baking soda in your pantry for their distinct uses. Be sure to share whatever delicious treats you bake with others, as well as sharing your new knowledge of the bubbly chemistry contained within.

Nathan Kilah, Senior Lecturer in Chemistry, University of Tasmania

This article is republished from The Conversation under a Creative Commons license. Read the original article.

New figures show shocking numbers of Australian kids are not achieving basic swimming skills.

Royal Life Saving Australia data estimates 48% of Year 6 students cannot swim 50 metres and tread water for two minutes. For those in high school, the results are even more worrying. Teachers estimate 39% of Year 10 students still cannot meet the same benchmark.

These skills are based on minimum swimming and water safety standards children should achieve to have fun and stay safe in the water. They are a key strategy to reduce the risk of drowning.

While this research indicates we may no longer be a nation of swimmers, there’s still plenty parents, schools and governments can do. And if your child’s lessons have fallen behind, it is not too late to catch up.

Why are we seeing this?

This latest research builds on previous worries about Australian children’s swimming skills. During COVID, there were concerns children would not come back to lessons after lockdowns.

While participation in lessons post-lockdowns has been promising, some pools have had difficulty finding qualified staff.

In 2023, Royal Life Saving Australia also cautioned about 100,000 children in late primary school were unlikely to return to swimming lessons before they started high school.

It’s not too late

If you have stopped lessons with your children – or if you never started – it is not too late to go to the pool.

Research comparing children between the ages of three and eight indicates the optimum age to begin formal swimming lessons is around five to seven years.

But children can still learn to become safe and competent swimmers in later primary years and into high school. We know this because adults can, and do learn to swim later in life.

Research also suggests older children may learn to swim more quickly than younger children, so they may need fewer lessons to attain skills than their younger counterparts.

Make sure lessons are regular

If you have an older child starting swimming lessons it’s important to maintain regular classes.

For example, a 2018 study on a group of 149 Latino children in the United States aged three to 14 showed those who had learned the most skills had the highest attendance – attending at least ten lessons over an eight-week period.

If weekly lessons are too difficult, you could consider holiday intensive programs and supplement this with informal practice in the water. Research shows informal swimming – such as playing – can help children build their swimming skills if they are also having lessons.

There are barriers to regular lessons

We know some families find it difficult to commit to swimming lessons. On top of the cost, there may not be a local pool available or enough instructors.

These barriers disproportionately impact people from low-socioeconomic backgrounds and those living in rural and remote areas. Royal Life Saving survey respondents from these groups were more likely to report their school-aged children had never attended swimming lessons.

Schools also find it hard

Schools can help by offering swimming lessons at key points. For example, two weeks of daily lessons when children are in Year 2 is a common model in New South Wales public schools.

In Tasmania, children in Years 3, 4 and 5 have a mandatory requirement to attend swimming lessons. There is optional attendance for those in Year 6 if they are identified as being at high risk.

But schools also report challenges in teaching kids how to swim.

Swimming lessons are expensive, schools are short-staffed and dealing with a crowded curriculum. This is why 31% of surveyed schools don’t offer swimming education.

For some children, who are behind in their swimming skills – or who cannot swim at all – a short burst of school lessons may not be enough to catch them up.

We need to do more

Schools still have a vital role to play in ensuring children are not missing out on developing these minimum, lifesaving skills. So Australian governments need to prioritise swimming as one of the few sports you can learn that will help to save your life.

Royal Life Saving Australia says the following four measures would help prevent drownings:

1. increased funding for existing school and vacation swimming programs

2. increased grants targeting people with vulnerabilities to drowning, including those from refugee, migrant, and regional communities, as well as for Aboriginal and Torres Strait Islander peoples

3. increased access to lifesaving programs in high schools

4. building and refurbishing public swimming pools and swim schools.

Rates of fatal drowning in Australia are increasing. They were up 16% on the ten-year average in 2024. We have just had a particularly horrific summer where 104 people drowned, a number that is higher than both last summer and the five-year average. Swimming skills are more important than ever.

Amy Peden, NHMRC Research Fellow, School of Population Health & co-founder UNSW Beach Safety Research Group, UNSW Sydney

This article is republished from The Conversation under a Creative Commons license. Read the original article.

If you peruse the philosophy section of your local bookshop, you’ll probably find a number of books on Stoicism – an ancient philosophy enjoying a renaissance today. But where are the Epicureans?

Both philosophical schools were popular in the ancient world. However, while stoic works such as Meditations by Marcus Aurelius and Seneca’s letters still fill the shelves, alongside contemporary takes such as The Daily Stoic (2016), Epicureanism largely remains a historical curiosity.

Today, the Greek thinker Epicurus (341–270 BCE) is mostly remembered as the originator of the term “epicurean”, which describes someone devoted to sensual enjoyment, particularly of fine food and drink.

And while it’s true Epicurus argued pleasure is the highest human good, there’s a lot more to Epicureanism than merely savouring a glass of Shiraz with haute cuisine.

Philosophers in the garden

Epicurus was born on the island of Samos to Athenian parents. He studied philosophy in Athens before travelling to the island of Lesbos to establish a philosophical academy.

Upon returning to Athens in 306 BCE, he bought a tract of land and began a philosophical community known as the Garden.

The Garden was radically different from other philosophical communities at the time. While Plato’s Academy generally trained the children of the Athenian elite, and Aristotle tutored nobles such as Alexander the Great, Epicurus’ Garden was far more inclusive. Women and slaves were welcome to join the dialogue.

The community led a frugal life and practised total equality between men and women, which was uncommon at the time. In this atmosphere, noblewomen and courtesans, senators and slaves, all engaged in philosophical debate.

While many early Epicureans have disappeared from the annals of history, we know of some women, such as Leontion and Nikidion, who were early proponents of Epicurean thought.

Philosophy as a way of life

It isn’t just the Garden’s inclusivity that gives it contemporary appeal, but its entirely unique notion of what constitutes a philosophical life.

According to Epicurus, a philosopher wasn’t someone who taught or wrote philosophical tracts. A philosopher was someone who practised what the French philosopher Pierre Hadot describes, in his work on Epicureanism, as “a certain style of life”.

Epicureanism was a daily practice, rather than an academic discipline. Anyone who strove to live a philosophical life was part of the Epicurean community and was considered a philosopher.

The concept of philosophy Epicurus promoted was more egalitarian and all-encompassing than the narrow definition we often see used today.

The pursuit of pleasure

But what did it mean to be a practising Epicurean? Epicurus conceived of philosophy as a therapeutic practice. “We must concern ourselves with the healing of our own lives,” he wrote.

This process of healing involves developing an inner attitude of relaxation and tranquillity known as anesis in Ancient Greek. To do this, Epicureans sought to turn their minds away from the worries of life and focus instead on the simple joy of existence.

According to Epicurus, unhappiness comes because we are afraid of things which should not be feared, and desire things which are not necessary and are beyond our control.

Most notably, he rejected the idea of an afterlife, arguing the soul did not continue to exist after death. He also argued it was wrong to fear death as it

gives no trouble when it comes [and] is but an empty pain in anticipation.

Instead of fearing punishment in the beyond, he said we should focus on the possibilities for pleasure in the here and now. But that doesn’t mean chasing every pleasure which comes our way; the task of the Epicurean is to understand which pleasures are worth pursuing.

The highest pleasures are not those which yield the highest intensity or last the longest, but those which are the least mixed with worry and the most likely to ensure peace of mind. In this vein, Epicurus sought to cultivate feelings of gratitude and appreciation for even the simplest everyday experiences.

While his critics cast him and his followers as unrestrained hedonists, he wrote in one letter that a single piece of cheese was as pleasurable as an entire feast.

For Epicureans, it is precisely the brevity of life that gives us such an exquisite capacity for pleasure. As one Epicurean Philodemus wrote:

Receive each additional moment of time in a manner appropriate to its value; as if one were having an incredible stroke of luck.

A philosophy for outsiders

Epicurus’ perennial appeal resides in how his philosophy gave strength and inspiration to outsiders. In the late 19th century, aesthetes such as critic Walter Pater and playwright Oscar Wilde praised Epicureanism as a way of life.

In Wilde’s letter De Profundis (From the depths) – written in 1897 while imprisoned in Reading Gaol on charges of indecency – he wrote that Pater’s novel Marius the Epicurean (1885) had given him both intellectual and spiritual solace during his trial.

Pater, too, had faced discrimination at Oxford for having homosexual relationships. His novel is an evocative celebration of the possibilities of a life lived in the pursuit of sensual and spiritual beauty.

In one of his earlier texts, The Renaissance (1873), Pater paraphrases Victor Hugo, writing

we are all under a sentence of death but with a sort of indefinite reprieve […] we have an interval, and then our place knows us no more. […] Our one chance lies in expanding that interval, in getting as many pulsations as possible into the given time.

This profoundly Epicurean sentiment, of a life lived in the interval, remains appealing to those who seek to turn their lives into a work of art.

Thomas Moran, Lecturer in the Department of English, Creative Writing and Film, University of Adelaide

This article is republished from The Conversation under a Creative Commons license. Read the original article.

This month marks a decade since Netflix – the world’s most influential and widely subscribed streaming service – launched in Australia.

Since then the media landscape has undergone significant transformation, particularly in terms of how we consume content. According to a 2024 Deloitte report, Australians aged 16–38 spent twice as much time watching subscription streaming services as free-to-air TV (both live and on-demand).

Part of the success of streaming services lies in their ability to provide content that feels handpicked. And this is made possible through the use of sophisticated recommender systems fuelled by vast amounts of user data.

As streaming viewership continues to rise, so too do the risks associated with how these platforms collect and handle user data.

Changing methods of data collection

Subscription streaming platforms aren’t the first to collect user data. They just do it differently.

Broadcasters have always been invested in collecting viewers’ information (via TV ratings) to inform promotional schedules and attract potential advertisers. These data are publicly available.

In Australia, TV data are collected anonymously via the OzTam TV ratings system, based on the viewing habits of more than 12,000 individuals.

Each television in a recruited household is connected to a metering box. Members of the household select a letter that corresponds to them, after which the box records their viewing data, including the program, channel and viewing time. But this system doesn’t include broadcasters’ video-on-demand services, which have been around since the late 2000s (with ABC iView being the first).

In 2016 a new system was launched to measure broadcast video-on-demand data separately from OzTam ratings.

However, it collected data in a rolling seven-day report, in the form of total minutes a particular program had been watched online (rather than the number of individuals watching, as was the measurement for TV). This meant the two data sources couldn’t be combined.

In 2018, OzTAM and Nielsen announced the Virtual Australia (VoZ) database which would integrate both broadcast TV and video-on-demand data. It took six years following the announcement for the VoZ system to become the industry’s official trading currency.

Streamers’ approach

Streaming platforms such as Netflix have a markedly different approach to acquiring data, as they can source it directly from users. These data are therefore much more granular, larger in volume, and far less publicly accessible due to commercial confidence.

In recent years, Netflix has shared some of its viewing data through a half-yearly report titled What We Watched. It offers macro-level details such as total hours watched that year, as well as information about specific content, including how many times a particular show was viewed.

Netflix also supplies information to its shareholders, although much of this focuses on subscriber numbers rather than specific user details.

The best publicly accessible Netflix data we have is presented on its Tudum website, which includes global Top 10 lists that can be filtered by country.

The main data Netflix doesn’t share are related to viewer demographics: who is watching what programs.

Why does it matter?

Ratings and user data offer valuable insights to both broadcasters and streaming services, and can influence decisions regarding what content is produced.

User data would presumably have been a significant factor in Netflix‘s decision to move into live content such as stand-up comedy, the US National Football League (NFL) and an exclusive US$5 billion deal with World Wrestling Entertainment.

Streaming companies also use personal data to provide users with targeted viewing suggestions, with an aim to reduce the time users spend browsing catalogues.

Netflix has an entire research department dedicated to enhancing user experience. According to Justin Basilico, Netflix’s Director of Machine Learning and Recommender Systems, more than 80% of what Netflix users watch is driven by its recommender system.

As noted in its privacy statement, Netflix draws on a range of information to provide recommendations, including:

• the user’s interactions with the service, such as their viewing history and title ratings
• other users with similar tastes and preferences
• information about the titles, such as genre, categories, actors and release year
• the time of day the user is watching
• the language/s the user prefers
• the device/s they are watching on
• how long they watch a particular Netflix title.

If a user isn’t happy with their recommendations, they can try to change them by editing their viewing and ratings history.

Personalised or predetermined?

The rise of streaming hasn’t only transformed how we watch TV, but also how our viewing habits are tracked and how this information informs future decisions.

While traditional broadcasters have long relied on sample anonymised data to measure engagement, streaming platforms operate in a landscape in which detailed user data can be used to shape content, recommendations and business decisions.

While personalisation makes streaming more appealing, it also raises important questions about privacy, transparency and control. How much do streaming platforms really know about us? And are they catering to our preferences – or shaping them?

Marc C-Scott, Associate Professor of Screen Media | Deputy Associate Dean of Learning & Teaching, Victoria University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Including pronouns in introductions, your email signature or your social media bio may seem like a minor detail. Pronouns are just small words we use in place of names all the time. But, like names, pronouns have personal significance. They say something about who we are.

Trans, nonbinary and gender-diverse people face many issues more pressing than pronouns, including health and educational disparities and disproportionately higher rates of abuse, violence and discrimination. Getting pronouns right is a simple thing everyone can do to show respect.

Linguistic shifts towards gender inclusivity are occurring worldwide, and the use of gender-neutral or inclusive pronouns is not a new nor exclusively Western phenomenon.

Chinese, one of the world’s oldest languages and spoken by more than one billion people, illustrates how languages adapt to reflect shifting understanding of gender. Its pronoun system may be on the cusp of significant change.

Developing pronouns

In my newly published research, I’ve explored what is happening with Chinese third-person pronouns.

The modern Chinese pronoun system is fascinating for two reasons.

First, gendered pronouns have only been part of the Chinese language for 100 years: the feminine pronoun 她 (she) was only adopted in the 1920s.

Second, although there are now distinct Chinese characters for “he”, 他, and “she”, 她, these are both pronounced tā in Mandarin. You can have a whole conversation about someone without revealing their gender.

The lack of gender-distinct pronouns in spoken Mandarin has prompted calls for written Chinese to follow suit. Queer Chinese speakers have proposed several gender-inclusive pronouns that would be pronounced tā, just like 他 (he) and 她 (she).

These include the romanised form “TA” and new Chinese characters 「⿰无也」 and 「⿰㐅也」. These new characters might look strange: they are written like this to clarify that they should be read as one Chinese character. Currently, they take up the space of two Chinese characters because they are not yet in Unicode and cannot be typed properly.

Other people hope to see the now-masculine 他 regain its original function as an ungendered pronoun.

What pronouns do queer Chinese speakers use?

To understand how Chinese pronouns are changing, I surveyed more than 100 queer Chinese speakers across 12 countries. I asked survey respondents, a third of whom were nonbinary or otherwise gender-diverse, about their pronoun preferences and perceptions. I also analysed how pronouns are used in a large database of contemporary Chinese texts.

My research found gender-inclusive pronouns accounted for about a quarter of first-choice pronouns, and nearly half of all pronouns used by survey respondents. TA was overwhelmingly preferred by gender-diverse individuals (70%), with the English “they” (20%) the next most popular option.

While cisgender and transgender men almost exclusively used masculine pronouns, cis and trans women showed significant openness to using gender-inclusive pronouns alongside feminine ones. After 她 (she), TA was the second most common pronoun for women (40%) and second most common overall (17%).

Notably, 他 (he) was not used by any women or gender-diverse people, except one who considered it gender-neutral. This suggests reviving its original ungendered usage may be difficult.

TA emerged as the most recognised gender-inclusive pronoun, with nearly all respondents (97%) familiar with it regardless of their age, gender, region or language background. In contrast, fewer than 8% had encountered the new character-based pronouns 「⿰无也」 or「⿰㐅也」 and no one reported using them.

What makes TA so popular?

Survey participants were overwhelmingly positive about TA, with 63% expressing favourable views. As one respondent explained:

The look and feel is good, it suits people’s everyday pronunciation habits, and doesn’t create issues with having to specify someone’s gender.

TA functions similarly to English singular “they”. It works in two ways: as a gender-neutral pronoun when gender is unknown (like saying “someone left their umbrella”), and as a gender-inclusive pronoun specifically including gender-diverse people.

Many survey respondents called TA “respectful” and “inclusive” but also simply “convenient”.

However, some respondents were concerned TA is “untraditional” and “pollutes the Chinese language”.

Practical considerations for using emerging Chinese pronouns also extend to the technical challenges of typing new Chinese characters. Before a new character can be typed on computers or phones, it needs to be officially encoded in Unicode, the global standard for digital text.

My research shows this requirement is strongly influencing which emerging Chinese pronouns can gain traction.

While some survey respondents hoped to see a gender-inclusive Chinese character adopted, they weren’t optimistic about 「⿰无也」or 「⿰㐅也」 becoming mainstream.

As one noted:

「⿰无也」is good, but it’s hard to type and it takes a long time to explain.

User-friendly and easily understandable

TA is currently the most popular emerging Chinese gender-inclusive pronoun, crucially because it mimics how people use tā in spoken Mandarin.

It is already part of people’s vocabulary, and already used (at least as a gender-neutral pronoun) by mainstream Chinese media and on online platforms.

Unlike other recently proposed pronouns, TA is versatile, user-friendly and easily understandable for queer and non-queer Chinese speakers alike. This makes TA a strong contender for widespread adoption into contemporary Chinese.

Like the introduction of a Chinese feminine pronoun 她 (she) in the 1920s, the emergence of TA as a gender-inclusive pronoun in the 2020s is about recognising a wider spectrum of identities.

Pronouns are not a political statement, just a personal statement. When you use someone’s correct pronouns, you’re saying, “I see you, and I respect who you are”. That’s something worth talking about, in any language.

Janet Davey, PhD Candidate, Australian Centre on China in the World, Australian National University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

It took thousands of years to develop the world’s extraordinary range of domesticated farm animals – an estimated 8,800 livestock breeds across 38 farmed species.

But this diversity is dwindling fast. Advances in selective breeding and artificial insemination have fuelled the global spread of a small number of profitable livestock types. Their popularity has left ever more heritage breeds at risk of extinction.

Why does this matter? Each breed represents vital genetic diversity for the livestock species on which we rely, known as agrobiodiversity. As the number of breeds shrink, we lose their genetics forever.

There are bright spots amid the decline. Hundreds of passionate farmers are working hard to keep heritage breeds alive around Australia. As my new book shows, they do it primarily for love.

Which livestock breeds are disappearing – and why?

Cattle have experienced the highest number of extinctions, with at least 184 breeds lost globally.

Of all chicken breeds, one in ten is now extinct, and a further 30% are endangered.

Sheep are also rapidly losing diversity, with 160 breeds now extinct. The rise of synthetic materials has endangered the remaining breeds producing carpet wool in New Zealand and Australia, including the unique Tasmanian Elliottdale.

Pigs fare little better. Australia’s 2.5 million pigs are predominantly Large White, Landrace and Duroc crossbreeds, while none of the eight remaining purebred pig breeds in Australia currently has more than 100 sows registered with the Rare Breeds Trust. While not all sows are registered, we know breeds such as Tamworths are at dangerously low numbers.

How did this happen? Over the past century, the goal of animal husbandry has shifted from breeding hardy, multipurpose animals to increasing performance for economic gain. For livestock, performance means more of what humans value, such as pigs with extra ribs, prolific egg-laying hens and sheep with finer wool.

Huge sums have been spent on selective breeding and artificial insemination technologies. This, in turn, has made it possible for a small number of profitable livestock types to be farmed globally.

For instance, when you buy a roast chicken, it will likely be one of just two types of fast-growing broilers (meat chickens), the Ross or the Cobb. Their genetics are developed and trademarked by two multinational agribusinesses who dominate the global broiler market.

It’s hard to overstate how big the increases in production have been from reproductive technologies. In the dairy industry, for instance, milk yield per cow has doubled in the past 40 years. These volumes are around six times greater now than a century ago.

Holsteins, the top dairy breed, have become globally dominant. Almost 1.4 million of Australia’s 1.65 million dairy cows are Holsteins. But as Holstein numbers soar, other breeds dwindle. Many farmers have simply stopped rearing other breeds, leading to many becoming endangered or extinct.

For Holsteins themselves, this has come with a cost. Selective breeding for high milk volume has meant Holsteins suffer more medical issues such as metabolic diseases and frequent mastitis. They also have reduced fertility and longevity.

Researchers have found 99% of Holstein bulls produced by artificial insemination in the United States are descended from just two sires. This wide dissemination of limited bloodlines has led to the spread of genetic defects.

What is at stake?

Our food systems face growing threats. Genetic diversity provides a safeguard for livestock species against lethal animal diseases such as H5N1 bird flu and African swine fever.

If we rely on just a few breeds, we risk a wipe out. The Irish potato famine is a catastrophic example. In the 1800s, Irish farmers took up the “lumper” variety of potatoes to feed a growing population. But when fungal rot struck in the 1840s, it turned most of the crop to mush – and led to mass starvation.

Some breeds have very useful traits, such as resistance to particular pests and diseases.

Chickens and other birds die in swathes if infected by Newcastle disease, one of the most serious bird viruses. But breeds such as the hardy Egyptian Fayoumi survive better, while the European Leghorn – whose genetics are used in commercial egg-laying breeds – is highly susceptible.

Local breeds can also have better resistance to endemic pests. The Indian zebu humped cattle breed, for example, is less prone to tick infestation than crossbreeds.

Climate change is also making life harder for livestock, and some breeds are better adapted to heat than others.

For different cultural groups, local heritage breeds also have unique symbolic and culinary value.

While it’s well-known eating less meat would benefit ecosystems, animal welfare and human health, eating meat remains entrenched in our diets and the economy. Pursuing more sustainable and higher-welfare approaches to livestock production is crucial.

Some Aussie farmers love heritage breeds

A cohort of Australian farmers is working hard to conserve dozens of endangered livestock breeds such as Large Black pigs, Shropshire sheep and Belted Galloway cattle.

But these farmers are hampered by our reluctance as consumers to pay more to cover the cost of raising slower-growing breeds in free-range environments. Not only that, but meat processors are increasingly closing their doors to small-scale producers.

Why persevere? For four years, I’ve conducted ethnographic research with Australia’s heritage breed farmers. I found they were motivated by one of the most powerful conservation tools we have: love.

Of his endangered English Leicester sheep, one farmer told me:

I consider them to be family; they have been our family for over 150 years. I talk to them, and the rams in particular talk to me. Sorry if I sound like a silly old man, but you must talk to them. I gave myself a 60th birthday present by commissioning a large portrait of an English Leicester head, which hangs in our kitchen (I do not have a painting of my wife).

Love doesn’t often feature in agricultural research. But it is an important force. We know from wildlife conservation that humans will act to save what they love. This holds for livestock, too.

What can you do? If you eat meat or work with wool, seek out rare breeds and join organisations such as the Rare Breeds Trust of Australia and the Australian Food Sovereignty Alliance who back farmers supporting breed diversity.

Catie Gressier, Adjunct Research Fellow in Agriculture and Environment, The University of Western Australia

This article is republished from The Conversation under a Creative Commons license. Read the original article.

A second man has died from Japanese encephalitis virus in New South Wales on March 6, the state’s health authorities confirmed on Friday. Aged in his 70s, the man was infected while holidaying in the Murrumbidgee region.

This follows the death of another man in his 70s in Sydney last month, after holidaying in the same region in January.

Japanese encephalitis virus has also been detected for the first time in mosquitoes collected in Brisbane’s eastern suburbs, Queensland health authorities confirmed on Saturday.

With mosquito activity expected to increase thanks to flooding rains brought by Ex-Tropical Cyclone Alfred, it’s important to protect yourself from mosquito bites.

What is Japanese encephalitis virus?

Japanese encephalitis is one of the most serious diseases that spreads via mosquitoes, with around 68,000 cases annually across Southeast Asia and Western Pacific regions.

The virus is thought to be maintained in a cycle between mosquitoes and waterbirds. Mosquitoes are infected when they feed from an infected waterbird. They then pass the virus to other waterbirds. Sometimes other animals, and people, can be infected.

Pigs are also a host, and the virus has spread through commercial piggeries in Victoria, NSW and Queensland. (But it poses no food safety risk.)

Feral pigs and other animals can also play a role in transmission cycles.

What are the symptoms?

Most people infected show no symptoms.

People with mild cases may have a fever, headache and vomiting.

In more serious cases – about one in 250 people infected – people may have neck stiffness, disorientation, drowsiness and seizures. Serious illness can have life-long neurological complications and, in some cases, the infection can be life-threatening.

There’s no specific treatment for the disease.

When did Japanese encephalitis get to Australia and why is it in Brisbane?

Outbreaks of Japanese encephalitis had occurred in the Torres Strait during the 1990s. The virus was also detected in the Cape York Peninsula in 1998.

There had been no evidence of activity on the mainland since 2004 but everything changed in the summer of 2021–22. Japanese encephalitis virus was detected in commercial piggeries in southeastern Australia during that summer.

This prompted the declaration of a Communicable Disease Incident of National Significance. At the time, flooding accompanying the La Niña-dominated weather patterns and a resulting boom in mosquito numbers, and waterbird populations, was thought responsible.

The virus has spread in subsequent years and has been detected in the mosquito and arbovirus surveillance programs as well as detection in feral pigs and commercial piggeries in most states and territories. Only Tasmania has remained free of Japanese encephalitis virus.

Human cases of infection have also been reported. There were more than 50 cases of disease and seven deaths in 2022.

Cases of Japanese encephalitis have already been reported from Queensland in 2025.

Due to concern about Japanese encephalitis virus and other mosquito-borne pathogens, health authorities around Australia have expanded and enhanced their surveillance programs.

In Queensland, this includes mosquito monitoring at a number of locations, including urban areas of southeast Queensland. Mosquitoes collected in this monitoring program tested positive for Japanese encephalitis virus, promoting the current health warnings.

Why is its detection in Brisbane important?

Up to now, scientists have thought the risk of Japanese encephalitis was likely greatest following seasons of above-average rainfall or flooding. This provides ideal conditions for waterbirds and mosquitoes.

But the activity of Japanese encephalitis virus over the summer of 2024–25 has taken many scientists by surprise. Before Ex-Tropical Cyclone Alfred arrived, there had been somewhat dry conditions with less waterbird activity and low mosquito numbers in many regions of eastern Australia.

However there has still been widespread Japanese encephalitis virus activity in Victoria, NSW and Queensland.

To date, Japanese encephalitis virus activity hasn’t extended to the coastal regions of southeast Queensland. The detection of the virus in suburban Brisbane may require authorities to rethink exactly where the virus may turn up next. Authorities are ramping up their surveillance to see just how widespread the virus is in the region.

Health authorities and scientists are also trying to understand how the virus moved from western areas of the state to the coast and what drives virus transmission in different regions.

There is currently no evidence the virus is active in coastal regions of northern NSW.

What can people do to protect themselves?

Avoiding mosquito bites is the best way to reduce the risk of Japanese encephalitis virus.

Cover up with long-sleeved shirts and long pants for a physical barrier against mosquito bites.

Use topical insect repellents containing DEET, picaridin, or oil of lemon eucalyptus. Be sure to apply an even coat on all exposed areas of skin for the longest-lasting protection.

Ensure any insect screens on houses, tents and caravans are in good repair and reduce the amount of standing water in the backyard. The more water there is around your home, the more opportunities for mosquitoes there are.

A safe and effective vaccine is available against Japanese encephalitis. Each state and territory health authority (for example Queensland, NSW, Victoria) have specific recommendations about access to vaccinations.

It may take many weeks following vaccination to achieve sufficient protection, so prioritise reducing your exposure to bites in the meantime.

Cameron Webb, Clinical Associate Professor and Principal Hospital Scientist, University of Sydney and Andrew van den Hurk, Medical Entomologist, The University of Queensland

This article is republished from The Conversation under a Creative Commons license. Read the original article.