For Science! 🐜

Biologists antagonised ants and found out they can hold grudges

January 12, 2025 Imma Perfetto

A closeup photo of a common black ant standing on the sharpened point of a stick of wood.
Black garden ant (Lasius niger). Credit: Aditya Vistarakula/Getty Images

Previous research has shown that ant colonies are more likely to behave aggressively towards neighbouring colonies, but less likely to do so against unfamiliar ones.

It’s known as the “nasty neighbour effect” and, until now, researchers weren’t sure why it exists.

A new Current Biology study has discovered that ants remember the smell of their enemies.

“We often have the idea that insects function like pre-programmed robots,” says Volker Nehring from the University of Freiburg, Germany.

“Our study provides new evidence that, on the contrary, ants also learn from their experiences and can hold a grudge.” 

The researchers pitted colonies of the black garden ant, Lasius niger, against each other. In the first phase of the experiment, they were exposed either exposed to nestmates or to ants from a different colony.

Each meeting lasted for one minute and was repeated once per day for 5 consecutive days. Ants’ aggression when encountering non-nestmates increased significantly during this training phase.

On day 6, the team found that ants acted most aggressively when encountering the non-nestmate colony they had previously fought but were less aggressive towards ants from a non-nestmate colony they hadn’t yet encountered. Unsurprisingly, they weren’t aggressive towards their own nestmates.

In the second phase of the experiment, encounters were repeated with either aggressive or passive ants from a different colony. They found the ants that had previously only encountered passive competitors behaved significantly less aggressively.

Because ants use odours to distinguish between members of their own nest and those from other nests, the study suggests that ants learned to associate aggression with the non-nestmate colony’s specific scent.

Nehring and his team now plan to investigate whether and to what extent ants adapt their olfactory receptors to their experiences.

Originally published by Cosmos as Biologists antagonised ants and found out they can hold grudges

I Would Not Have Thought To Measure This-

(It’s been decades since I’ve lived in a place with public transit; when I read the title, I thought they meant human jerks. I was pleasantly educated.)

The device that measures jerks on public buses

December 11, 2024 Ellen Phiddian

A jerking, lurching bus ride can be enough to put someone off their lunch – or even dissuade them from using public transport.

But just how much do public buses jostle passengers?

Measuring this, according to one team of researchers, might help to make the vehicles more comfortable.

The researchers, from University of Technology Sydney, have published a recent study in Scientific Reports.

According to co-author Dr Anna Lidfors Lindqvist, bumpy bus rides aren’t just annoying. They can carry health risks.

“Passengers, especially if they’re a little bit elderly or if have a pre-existing injury, those sorts of sudden changes can actually make it worse,” she tells Cosmos.

“If that’s a blocker for elderly people to take public transport, that’s a great area to further look at.”

In addition, studies on frequent or professional drivers and passengers have suggested that long-term exposure to engine vibrations could be linked to chronic pain conditions like lower back pain.

The team set out to measure the speed and direction of vibrations and sudden movements on public buses, to give them a baseline for improving bus bumpiness.

One of the researchers – Md Imam Hossain – took rides on 30 public buses driving different routes around Sydney, carrying an inertial measurement unit (IMU).

“An IMU can gather the acceleration in vertical and longitudinal as they’re ported backwards, side to side, and up and down, as well as then being able to measure the rate of change in those directions,” says Lidfors Lindqvist.

They were particularly keen to measure “jerks” – jolts caused by sudden acceleration or braking – which are a strong indicator of bus ride discomfort.

They found that, on average, passengers experience 0.12 times the force of gravity in acceleration, with peaks at 0.44 times.

They’ve got several different ideas for reducing jerks.

“There’s a lot of different sorts of suspension – like where they use air suspension, rather than pneumatic suspension, that’s usually a softer ride,” says Lidfors Lindqvist.

Softer seats – like those used in coach buses or for truck and bus drivers – are also more comfortable.

“Cushioning a seat is enough for it to be a softer ride in terms of the overall vibration from the seat. Whereas, the jerk itself is a little bit more difficult to have a mechanical solution because your body will still move the same.”

Lidfors Lidqvist says that the transition to electric buses is a mixed bag – they don’t vibrate like diesel engines, but they can accelerate much faster.

“This is really another open question: does that then introduce another sort of jerk?”

But buses don’t need to be wholly redesigned for more comfort. The team thinks that driver training can also help.

“Bus driver behaviour is also a factor, and so is the traffic environment that they’re exposed to. Peak hour traffic looks very different than if it’s off peak,” says Lidfors Lindqvist.

In this study, Hossain sat at the same seat on the bus each time for consistency. But there are more and less comfortable zones on a bus, according to Lidfors Lindqvist.

“Other research, will tell you that you’ll find that the ride is often a little bit softer if you sit on top of the wheel axis, for example,” she says.

“But that jerk movement, when you move back and forth when the bus takes off or stops – that will remain pretty much the same, because it’s just your body in relation to the vehicle itself.”

The team is now interested in looking at the connection between buses and human injuries, as well as optimising bus comfort with efficiency of the ride, and greenhouse gas emissions.

Originally published by Cosmos as The device that measures jerks on public buses

Any Excuse to Crank Up Muse

or no excuse at all, really, but they’re a fine accompaniment for this!

5 black holes stories to muse about

January 2, 2025 Imma Perfetto

There was no shortage of mind-bending new science about black holes this year, these are just 5 of our favourites.

Blast “Supermassive Black Hole” by English rock band Muse and enjoy!

Scientists take even crisper images of supermassive black holes

The Event Horizon Telescope (EHT) Collaboration made the highest resolution black hole observations ever from the surface of Earth, capturing M87* and Sagittarius A* at the centres of the Messier 87 and Milky Way galaxies.

Read more.

Black hole “starving” galaxy to death

NASA’s James Webb Space Telescope (JWST) identified a black hole that confirmed the theory that some supermassive black holes can starve their host galaxies of the fuel needed to make new stars.

Read more.

Black holes are getting caught in “traffic jams”

The complex dynamics of black holes in the centres of galaxies, including how they slow down and interact with each other, were revealed in a new study published in the Monthly Notices of the Royal Astronomical Society.

Read more.

Largest stellar black hole in the Milky Way discovered

The European Space Agency’s Gaia mission found a massive stellar black hole, named Gaia BH3, just 2,000 light years away in the constellation Aquila. It is 33 times the mass of our Sun, more than 50% bigger than the next biggest stellar black hole – Cygnus X-1.

Read more.

First black hole triple system discovered

A black hole was discovered with two orbiting stars for the first time. One star orbits the black hole, V404 Cygni, every 6.5 days. The other orbits at a significantly greater distance and makes the same trip every 70,000 years.

Read more.

Originally published by Cosmos as 5 black holes stories to muse about

For Science!

Pregnant male pipefish defy evolutionary norms

January 2, 2025 Velentina Boulter

Velentina Boulter is science journalist based in Melbourne.

old image of pipefishGreater pipefish, Syngnathus acus 54, and Sargassum pipefish, Syngnathus pelagicus 55,56. Handcolored copperplate engraving from Gottlieb Tobias Wilhelm’s Encyclopedia of Natural History: Fish, Augsburg, 1804. Wilhelm (1758-1811) was a Bavarian clergyman and naturalist known as the German Buffon. (Photo by: Florilegius/Universal Images Group via Getty Images)

A new study out of the University of Canterbury in Christchurch, New Zealand has called into question traditional perceptions of mating.  

“In most species, males compete to attract females. But with pipefish, the males carry and protect the embryos,” says PhD student Nicole Tosto, who led the research.

“Pipefish are unique because they don’t follow the usual ‘rules’ of evolution.”

The research highlights how biological differences in male and female pipefish influence their survival and mating habits. 

While females have genes to support egg production, males activate genes to strengthen their immune system.

This is a key adaptation that allows the males to nurture and care for embryos in their bodies.

The study, published in Molecular Ecology, also uncovered how this switch in activated genes impacts mating selection.

In most species, females prefer larger, dominant males as mates because it often increases their chance of having healthy offspring, as the strong male can provide security and defence from predators.

Instead, the study found that female pipefish swim against this trend and tend to choose smaller males with high fitness levels.

Tosto suggests that this selection is based on efficiency as smaller males may need fewer resources.

Robust ghost pipefish
Robust Ghost Pipefish, Solenostomus cyanopterus, Bali, Indonesia (Photo by Reinhard Dirscherl\ullstein bild via Getty Images)

She also believes smaller males could be better suited for the synchronised water movements that are a part of the species’ courtship rituals. 

In many animals, males and females of the same species can have physical features that are different between the sexes and are often used to attract mates. These visible traits are known as sex-specific ornaments. 

However, the pipefish species involved in the study were monomorphic, meaning that male and female pipefish looked almost identical and had no visible differences.

“Nicole’s research has brought up important questions for evolutionary biologists when it comes to current vs past selection,” says her doctoral supervisor, Dr Sarah Flanagan, a senior lecturer in Biological Science at the University of Canterbury.

Natural selection is a process where individuals with traits that help them survive become more likely to reproduce and therefore pass on those traits to their offspring. Overtime these advantageous traits become more commonly inherited among the species.

“For example, whether the existence of sex-specific ornamentation is evidence that selection is currently acting strongly on those sex-specific traits or whether ornaments are evidence of selection having happened in the past.”

Pipefish don’t have sex chromosomes meaning both sexes share the same genetic blueprint, they just use the genes in different ways.

For example, females focus on producing egg-enhancing proteins, whereas males produce immune-boosting proteins for pregnancy.

 “Knowing how these pressures shape mating systems helps us better understand how species survive and adapt to their environments,” says Tosto.

While there is no current extinction concern for dusky pipefish (Syngnathus floridae), the species of pipefish investigated in the study, other pipefish species such as the estuarine pipefish are critically endangered.

Seahorses also behave like pipefish

True Facts: How A Species Gets A Name!

Firefly Sparkle shines light on galaxy formation in a youthful universe

December 12, 2024 Ariel Marcy

Astronomers have trained the James Webb Space Telescope (JWST) on a galaxy named “Firefly Sparkle.” But the young galaxy may not invite you to its birthday party as it is already accompanied by galaxies newly named “Firefly-Best Friend” and “Firefly-New Best Friend!”

Firefly Sparkle does give astronomers a gift: the first glimpse of a typical galaxy in its early stages in the context of a very young universe.

The james webb space telescope in space. The telescope was trained on the firefly sparkle galaxy.
The James Webb Space Telescope. Credit: NASA GSFC/CIL/Adriana Manrique Gutierrez.

Indeed, the galaxy’s high redshift allowed scientists to date the light we see back to when the universe was just 600 million years old (it is now 13.8 billion years old).

Redshift is the phenomenon which occurs when the source of light moves away from an observer, stretching the light’s wavelength toward the red part of the spectrum. Redshift is due to the expansion of space itself and objects with greater redshifts are older.

Firefly Sparkle was first observed with the Hubble Space Telescope during a survey of the galaxy cluster MACS J1423.8 + 2404. This cluster is massive and as a result, it magnifies the light coming from objects directly behind it but in Earth’s line of sight.

This gravitational lensing effect combined with the sensitivity of the JWST allowed astronomers to study Firefly Sparkle in detail.

The images had enough resolution to show that most of the young galaxy’s mass is concentrated in just 10 star clusters. This makes Firefly Sparkle the farthest galaxy with well-resolved star clusters imaged with spectrographic instruments.

The team also discovered that the galaxy is gas-rich and has a total mass approximately 10 million times the mass of the Sun, which makes it similar in size to that of a progenitor Milky Way.

The authors suggest that observation of Firefly Sparkle could help us understand how the early Milky Way formed. Perhaps cosmic friendship bracelets are in order.

The research is published in the journal Nature.

https://cosmosmagazine.com/space/astronomy/firefly-sparkle-galaxy-formation/

Professionals Miss Things That Could Become Big Things

Thanks, Janet! This could happen to anyone taking those meds, and these are prescribed to many people.

Electric vehicles as grid storage? It’s right around the (model house) corner

October 21, 2024 Ellen Phiddian

Many Australians now sell solar power generated on their rooftops into the grid on sunny days. In a handful of years, it may be possible to do the same thing when it’s dark – with the help of an electric vehicle (EV).

Nascent vehicle-to-grid (V2G) technology operates around the idea of EVs with bi-directional chargers: they can charge from power sources, but they can also be used to provide power. EVs could be used as mobile grid storage, with owners charging them on rooftop solar and then either using the power themselves later in the evening, or selling it back to the grid.

At the moment, the technology is rare in Australia, with both technological and economic research still needed to figure out how it will best fit into our energy mix.

Some of that research has just started at a model house in Port Macquarie, on the Mid-North Coast of New South Wales.

“If we can get the energy optimisation answer right with vehicle-to-grid technologies, we can avoid unnecessary expansion on the network, and we can help customers minimise their energy bills,” Brad Trethewey, manager of innovation at energy company Essential Energy, tells Cosmos.

Essential Energy has partnered with the CSIRO to trial V2G technology. The trial is running at a mock-home, fitted out with solar panels, batteries, a hot water system, and appliances including a fridge, a dishwasher, a TV and a pool pump.

Person checks tablet in front of washing machine and dryer
Some of the devices at the Innovation Hub in Port Macquarie. Credit: Essential Energy

“In this first phase, we’re looking at how vehicle-to-grid can be technically integrated into the home of the future. We’re doing tests where the vehicle powers a lab for periods of time, and we’re doing scheduled discharge and charge cycles with the vehicle,” says Trethewey.

“The second phase of the test is how we can coordinate the vehicle-to-grid technology, in a more integrated sense, with customers’ appliances and their flexible loads to minimise bills and maximise the use of their renewable energy resources – so, solar.”

The team expects the first phase to finish in late March next year.

“I don’t have an end date for second phase, because we expect the emergence of V2G to have ongoing research needs, even after it’s technically available,” says Trethewey.

While there are currently EVs being made with V2G technology, they’re not yet much use in Australia. Many EVs aren’t sold here with the right hardware or software, and regulations and standards around electricity can’t yet accommodate it.

Part of the work in the trial will be helping to assess how EV and solar owners might best use V2G.

“What is the value proposition? Does the market need to change as a result of vehicle-to-grid capability, or is most of the value in self-consumption – using it for your own energy consumption and needs?” says Trethewey.

Electric vehicle connected to charger
The Innovation Hub trialling vehicle-to-grid technology at Port Macquarie. Credit: Essential Energy

Once the second phase of the trial has wrapped, Trethewey says that the team will be interested in seeing how V2G plays out at scale – and in different areas, with different energy mixes.

One way or another, though, he expects bi-directional chargers and energy-storing EVs to become commonplace – soon.

“I think that there’s an inevitability about this. Once vehicle manufacturers produce vehicle-to-grid capability in their cars, cars are going to come with it, and when customers realise the value of that in terms of reducing their energy bills in their house, it’s going to become widespread.”

When might this happen? Trethewey thinks it’s possible before the end of the decade.

“Most vehicle manufacturers are saying they’re going to have some vehicle-to-grid capability in Australia, they’re talking late 2025, early 2026. Now, that doesn’t mean they’ll have it switched on – it just means that they’ll have the vehicles capable for it.

“So the next five years, I think, is probably well within reason.”

Originally published by Cosmos as Electric vehicles as grid storage? It’s right around the (model house) corner

https://cosmosmagazine.com/technology/energy/vehicle-to-grid-trial/

3 For Science on Friday!

Why did scientists name these new frogs after Star Trek characters?

What sound does a frog make? If you said “croak” or “ribbit” or even “bonk” like the  Australian pobblebonk frog, you’d be right. And now, thanks to new research, “Star Trek whistle” is also a correct answer!

Seven newly discovered species of frogs in Madagascar have been named for their unique calls, some of which are similar to whistle-like sound effects used in Star Trek: the “boatswain whistle” and “tricorder” device.

A photograph of a small yellow-brown frog with orange eyes against a white background.
Boophis siskoi. Credit: Mark D. Scherz

“That’s why we named the frogs after Kirk, Picard, Sisko, Janeway, Archer, Burnham, and Pike – 7 of the most iconic captains from the sci-fi series,” says Miguel Vences of the Technische Universität Braunschweig, Germany, who led the research. (snip-MORE)

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“Stellar volcano” captured in dramatic Hubble images

https://players.brightcove.net/5483960636001/default_default/index.html?videoId=6363356718112 (video on the page; it wouldn’t embed.)

Dramatic and colourful close-ups from NASA’s Hubble Space Telescope show a binary system of rambunctious stars. See the high-resolution image here.

The system is called R Aquarii. The primary star is an aging red giant more than 400 times heavier than our Sun. Its companion is a burned-out white dwarf.

The red giant pulsates, changes temperature, and varies in brightness by a factor of 750 times over a roughly 390-day period. At its peak the star is nearly 5,000 times brighter than our Sun.

Meanwhile, the white dwarf dances around the red giant. It orbits the giant star every 44 years.

When the white dwarf gets closest to the red giant, its gravity pulls hydrogen gas off the red giant. The material accumulates around the dwarf star and undergoes nuclear fusion. The result is an explosion akin to an enormous nuclear bomb.

Filaments shoot from the dwarf star’s core like a geyser, forming loops and trails of plasma traveling at more than 1.6 million km per hour. (snip-MORE)

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Confirmed: The Sun has reached solar maximum

Images of sun at solar minimum and minimum
Images from NASA’s Solar Dynamics Observatory highlight the appearance of the sun at solar minimum (left, Dec. 2019) versus solar maximum (right, May 2024). These images are in the 171 wavelength of extreme ultraviolet light, which reveals the active regions on the sun that are more common during solar maximum. Credit: NASA/SDO.

Representatives from NASA, the National Oceanic and Atmospheric Administration (NOAA) and the international Solar Cycle Prediction panel met on Tuesday and announced that the Sun has reached its solar maximum.

The solar cycle is 11 years. At the height of the cycle, the Sun’s magnetic poles flip and its activity intensifies.

Images of sunspots at solar minimum and minimum
Visible light images from NASA’s Solar Dynamics Observatory highlight the appearance of the Sun at solar minimum (left, Dec. 2019) versus solar maximum (right, May 2024). During solar minimum, the Sun is often spotless. Sunspots are associated with solar activity and are used to track solar cycle progress. Credit: NASA/SDO.

“During solar maximum, the number of sunspots, and therefore, the amount of solar activity, increases,” says Jamie Favors, the director of NASA’s Space Weather Program. “This increase in activity provides an exciting opportunity to learn about our closest star –but also causes real effects at Earth and throughout our solar system.”

Increased solar activity can affect satellites and astronauts in space, as well as communications and navigation systems. (snip-MORE)

Work to focus on engaging communities during the energy transition

(It can’t hurt to put bits like this out into the universe. Somebody’s working on this, and more people ought to. So a nice little discussion of what’s working is appropriate. -A)

October 11, 2024 ARC Laureate Fellows

This Cosmos series on Australian Research Council Laureate Fellows 2024 reflects excellence from world class researchers in Australia.

Chris Gibson is a Senior Professor in the School of Geography and Sustainable Communities at the University of Wollongong. For his ARC Fellowship, he is investigating how decarbonisation impacts Australian regions.

Professor Chris Gibson: finding a truce in the climate wars.

Decarbonisation and energy transition are at the sharp edge of a hot political battle. There is a lot of dispute over new technologies like offshore wind, and exactly what mix of energy we need. It’s like a second iteration of the climate wars. But after a decade of stalled policy on climate, we have to embrace the decarbonised future, whether we like it or not. It’s an issue that needs to transcend the political divide.

But we’re faced with a dilemma: we need urgent change, but urgent change rarely occurs, if ever, in a way that is fair. The burdens and benefits of change are not distributed equally across society. And the quicker the change, the more risks there are. Regions can be all too easily left behind.

Geographers think about how substantial change, like this energy transition, affects communities. We think of ourselves as an integrative discipline. We bring together expertise from across environmental science, economics, social geography, legal geography, and from experts who are good on governing transitions. By stitching together insights from all directions, we try to see the bigger picture.

My ARC project is aiming to put together a systematic understanding of what’s happening in decarbonisation, both from the top down, with a nationwide view, and from the ground up, about how people in different regions are responding to change.

We’re putting together a team to look at how decarbonisation hits the ground in different regions, and how it affects different workers, different industries, what kinds of opportunities come out of that, what kinds of changes are needed, how communities and households are responding to the decarbonisation challenge, and how a First Nations’ perspective can lead the way.

Community responses have to be taken seriously. It’s too easy and too convenient to cast aside sceptics as “nimbies” (Not In My Backyard) or selfish or ignorant. If you take the time to hear the diversity of opinions that come from communities, you’ll often find that people are worried about real issues, with valid concerns. Local communities are very knowledgeable about their patch, and have a capacity to understand what kinds of changes are needed. If we can forge a more inclusive process that brings regional perspectives, skills and experience to the forefront, we reduce the risk that regions are left behind. And governments might actually see regional communities as an opportunity rather than a hindrance to change.

A good example is here in the Illawarra, (Coastal New South Wales) where offshore wind has been very controversial in the last year. One of the lessons to be had is to not underestimate the community’s ability to understand what an energy transition means, and not to underestimate the degree of attachment people have to their local places.

The community here is highly knowledgeable about energy. The Illawarra has a workforce with a long history in heavy industry – the number of electricians per capita in the Illawarra must be as high as anywhere in Australia. And people have opinions – it’s not a passive region that knows nothing about the change that’s coming. The task is not purely to convince local people that this is a good thing, but to have a mature conversation with them about the pros and cons.

Who benefits in the energy transition?

There are all kinds of philosophical questions about who benefits, how those benefits are shared, what it means to turn our oceans into a space for energy generation. Some members of the community are asking for a proper conversation, because they don’t feel like they’ve been part of the story so far.

People react unpredictably to change that they see is imposed upon them. Let’s say it’s closing down a coal-fired power station in the Hunter Valley in New South Wales, or proposing a green hydrogen hub in South Australia – people don’t necessarily assess these as singular proposals that exist outside of everything else in their region or in their lives. People make sense of change in relation to their place, their community, their household, their family.

My work is about putting those people and their households first, and looking at it from their point of view. How does structural change look when we take into account the pressures of cost of living, on housing, on employment? People are grappling with these issues in their everyday lives.

There’s also a real risk in introducing changes that are presented to communities as if they have arrived from elsewhere, as a fait accompli. The direction of the flow of ideas and proposals, how they hit the ground, are a very important part of the process. If a proposal seems to arrive in their backyard from the top down – from a government or a corporation provider – you can get a community offside from the outset.

My work is about setting up different kinds of approaches that recognise that these communities have their own capacities and their own perspectives to offer. What we hope to do in the five years of the ARC Laureate program is develop an evidence base so that we can craft better models of how to manage this change. We’re looking at some of the implementations that have already occurred, tracing where those decarbonisation initiatives are hitting the ground, and looking at different kinds of community reactions – what sorts of processes work better than others in terms of building that relationship with community, as well as what happens when things end up in a more antagonistic situation.

Geography is the study of the relationship between humans and our environment. It has always occupied a slightly slippery position in universities and in public life, because we’re both a science and a social science, because we do this work of integrating perspectives from different areas of knowledge. In fact, we call ourselves all sorts of different things: we’re also environmental managers and coastal managers, policy officers and sustainability experts. It’s a discipline that connects, that fills the gaps. We often find solutions to problems by putting knowledge together from those different perspectives. It’s making these connections that can make a big difference.

As told to Graem Sims

https://cosmosmagazine.com/energise/engaging-communities-during-energy-transition/