Victoria plans H5 bird flu vaccination for more than 5,000 little penguins

Researchers at Aberystwyth University have reviewed genetic studies comparing traditional and modern cattle populations and found evidence that decades of selective breeding for productivity may have narrowed the genetic base of some modern breeds.

The review, published in Applied Animal Science, examines differences between traditional and modern populations within cattle breeds and highlights gaps in current knowledge about the genetic diversity that may still survive in ancestral or less intensively selected herds.

Traditional cattle populations can retain genetic variants that are absent or less common in their modern counterparts. According to the researchers, some of this diversity could prove useful for resilience, adaptation to changing environmental conditions and future breeding programs.

The review highlights traditional populations of breeds including Ayrshire, Jersey and Hereford. Genetic studies suggest that some of these populations remain distinct from modern, intensively selected populations of the same breeds.

Traditional herds are often relatively small and have generally been subjected to less intensive selection. Some have also developed in close association with particular local environments, potentially preserving genetic characteristics that have been reduced elsewhere.

“Traditional cattle populations are more than just historical relics—they are living genetic libraries that hold answers to some of the most pressing challenges facing agriculture today,” researcher Kardelen Oya Temiz said.

She noted that modern breeding has understandably focused on improving productivity but that this process has often come at the cost of genetic diversity.

Dr. Matthew Hegarty, senior lecturer in the Department of Life Sciences at Aberystwyth University, said modern agriculture had achieved major gains in efficiency and production while also narrowing the genetic base of many breeds. According to Hegarty, reduced diversity could make cattle populations more vulnerable to disease, environmental stress and changing conditions.

However, the researchers stress that relatively little is known about genetic differences between traditional and modern populations within many cattle breeds.

They therefore call for further genomic studies of breeds in which traditional or ancestral populations still survive. Such research could help identify genetic variants preserved in these populations and determine whether they could be valuable for future breeding programs.

The authors argue that conserving traditional cattle populations has practical as well as cultural importance. As farming conditions change, genetic diversity preserved in these animals could provide breeders with additional options for developing cattle better suited to future environmental and agricultural challenges.

Sources: Aberystwyth University, Temiz, K. O., Aubrey, W., & Hegarty, M. Differences between traditional and modern populations within cattle breeds: What do we not know? Applied Animal Science, 41(6), 597–608, Aberystwyth University Research Portal, Phys.org

Radio galaxies are powered by active galactic nuclei, bright central regions associated with matter falling toward supermassive black holes. Some produce jets that feed enormous radio-emitting lobes. When the jets stop, the lobes remain visible for a time as their particles lose energy. Astronomers call these systems remnant radio galaxies.

Researchers led by Sushant Dutta of the University of Cape Town and the Inter-University Institute for Data Intensive Astronomy studied 14 candidate remnants in the XMM-Newton Large-Scale Structure field.

They combined observations from the MeerKAT MIGHTEE and uGMRT superMIGHTEE surveys with data from LOFAR, GMRT and the Karl G. Jansky Very Large Array. Together, the observations covered radio frequencies from 144 MHz to 1.5 GHz.

Models of the sources' radio spectra classified 12 as remnants and reclassified two as active. The result shows why observations at several frequencies are important: candidates selected from limited data can be misidentified.

The models estimated total spectral ages of about 8 million to 42 million years, with a median of roughly 12 million years. These estimates are shorter than those for many remnants examined in earlier studies. The fraction of each source's estimated lifetime spent in the remnant stage ranged from 4% to 83%, suggesting that the sample includes galaxies at very different stages after their jets switched off.

Most of the sources are at relatively high redshifts. The researchers found an association between higher redshift and younger estimated spectral age after accounting for radio luminosity. They said stronger energy losses involving the cosmic microwave background, along with rapid expansion in low-density environments, could help explain the pattern. The observational study does not establish either explanation as the sole cause.

The sample is small, and the ages depend on models of how particles and magnetic fields evolve in the radio lobes. Even so, the findings point to a faint population that previous surveys may have missed. Future surveys with the Square Kilometre Array should find many more such sources and test how common short-lived remnants are.

The study was published in Monthly Notices of the Royal Astronomical Society.

Source: phys.org

In the film, Peter Parker asks whether the device uses target-specific short interfering RNA, usually shortened to siRNA. These small RNA molecules can be designed to recognize a particular messenger RNA, or mRNA.

Messenger RNA carries instructions copied from DNA to the cell's protein-making machinery. An siRNA guide can direct a cellular complex known as RISC to matching mRNA. The complex then cuts the target, reducing production of the corresponding protein.

This process is often called gene silencing, but the name can be misleading. The treatment does not remove or switch off the underlying DNA. It lowers the output of a selected gene, and the effect can wear off.

RNA interference is established medicine, not science fiction. Several siRNA drugs have been approved by the US Food and Drug Administration for conditions including hereditary amyloidosis, acute hepatic porphyria, primary hyperoxaluria, high cholesterol, hemophilia and familial chylomicronemia syndrome.

The fictional application presents much bigger problems. Spider-Man's abilities would presumably involve many proteins, tissues and biological pathways. A single siRNA target would be unlikely to suppress strength, reflexes, senses and other traits together. Targeting several genes would also increase the challenge of predicting side effects.

Delivery is another major obstacle. Most approved siRNA medicines are designed to reach the liver, although one approved product uses lipid nanoparticles and researchers are testing ways to reach other organs. A whole-body treatment affecting muscles, nerves and other tissues would be far more difficult.

Real siRNA drugs also do not behave like an instant switch. They generally reduce rather than eliminate production of a protein. Their effects vary by drug and can last for weeks or months. Even after the silencing effect declines, cells may need time to rebuild the affected proteins.

The film therefore uses a genuine biological mechanism as a plausible idea, not a technology that medicine can currently reproduce. RNA interference can selectively reduce protein production, but it cannot safely fine-tune fictional superpowers on demand.

Source: sciencenews.org

The talks took place in a working group under the Eurasian Economic Commission's Advisory Committee on Customs Regulation. Kuat Rakhimov, director of the commission's Department for Customs Legislation and Law Enforcement Practice, chaired the meeting.

One proposal from Kazakhstan would add coded information about relevant prohibitions and restrictions to declarations for express cargo and e-commerce goods. Standardized codes could allow customs systems to check some information automatically. The change may eventually shorten processing times, but the commission did not announce that it had been adopted or give a date for implementation.

Participants also considered a simplified declaration for goods sold by businesses in EAEU countries to individual buyers abroad through marketplaces and other online platforms. The proposal is intended to make customs procedures easier for exporters engaged in e-commerce.

The commission said it would prepare amendments to the rules for completing the e-commerce declaration. This means the measures remain under development.

The EEC has worked on special customs forms for express cargo and online trade for several years. Its Board approved an express-cargo declaration form and completion rules in 2018. It approved the structure and format of a separate declaration for e-commerce goods in December 2024.

Source: pravo.by

Dan Farag, director of innovation and practice at the Young Foundation, argues that community organisations and trusted local networks can play an important role during floods, infrastructure failures and other emergencies.

He proposes making more underused public land available for community food growing. He points to groups such as Incredible Edible as examples of residents working together to grow and share food. Such projects may strengthen local skills and connections, although they could not replace the national food supply on their own.

David E Alexander, emeritus professor of emergency planning and management at University College London, calls for elected politicians to lead a public discussion about long-term food planning and emergency reserves.

He cites Roadmap for Resilience: A UK Food Plan for 2050, an 86-page report produced through a research programme funded by UK Research and Innovation. The roadmap proposes changes to farming, diets, business planning, data and food-system governance. It is a research-led set of recommendations, not an adopted government plan.

Antony So, a co-author of the National Preparedness Commission's 2025 report Just in Case: 7 Steps to Narrow the UK Civil Food Resilience Gap, argues that emergency stocks must form part of a wider resilience system.

He points to Switzerland, where the federal government and private companies jointly maintain compulsory stocks. The system covers essential foods and agricultural inputs including fertiliser and animal feed. The Swiss government sets the required goods and quantities, while private businesses own and manage the stocks.

So argues that reserves alone would be insufficient during a prolonged crisis if electricity, fuel, water, transport or communications failed. Food security depends on all these systems continuing to function.

Together, the letters make the case for a broader public debate. Their proposals range from neighbourhood food growing to national contingency planning, but they share the view that resilience involves people, infrastructure and institutions as well as stored food.

Source: theguardian.com

The Met Office forecast a shift to cooler, more unsettled weather after a heatwave. Some places could receive intense showers, while others may get little rain. Water running quickly from hard, very dry ground can add to local flood risk when rainfall is particularly heavy.

That does not mean the drought is ending. At the start of August, Environment Agency figures showed that seven areas of England were in drought. Reservoir storage across England had fallen to 69%, which was 11.6 percentage points below the long-term average for that time of year. Five monitored reservoirs were classed as exceptionally low.

The dry conditions were also affecting rivers, wildlife and farming. The agency reported low flows, algal blooms, fish deaths and restrictions on water abstraction. More than 25 million people were covered by temporary limits on water use in early August.

Water supply problems continued in south-east England. South East Water said thousands of customers in parts of Kent lost supplies before most connections were restored. The company asked customers to limit use while storage tanks recovered.

Wessex Water also announced a temporary-use ban covering about 1.4 million customers in parts of south-west England. It was the company's first such restriction since 1976. Thames Water, which had already imposed restrictions, asked customers to keep reducing demand.

Brief downpours can reduce immediate pressure on vegetation and lower wildfire risk, but drought recovery normally requires sustained rainfall. Rivers, reservoirs and groundwater respond over different timescales, so several wet days in one area cannot restore depleted water resources across England.

Flooding and drought can therefore occur at the same time in different places, or even in the same region. A short, intense storm can overwhelm drains and produce rapid runoff while longer-term river flows, groundwater and reservoirs remain unusually low.

Source: theguardian.com