Science
Astronomers Analyze 104 Quasars in Groundbreaking MIGHTEE Study

A team of astronomers from Rhodes University and collaborating institutions conducted an extensive analysis of 104 quasars identified through the MIGHTEE survey, utilizing data from the MeerKAT radio telescope in South Africa. This research, published on July 16, 2025, on the pre-print server arXiv, aims to deepen understanding of quasars and their various properties.
Quasars, or quasi-stellar objects, are among the universe’s most luminous and distant entities, playing a critical role in numerous astrophysical and cosmological studies. As active galactic nuclei (AGN), they emit electromagnetic radiation across a spectrum that includes radio, infrared, visible, ultraviolet, and X-ray wavelengths. The MIGHTEE survey, part of an ongoing effort to image the extragalactic sky, focuses on exploring the cosmic evolution of galaxies, including AGNs.
Insights into Quasar Characteristics
The research team, led by Sarah V. White, meticulously examined data from the COSMOS and XMM-LSS fields within the MIGHTEE survey. They focused on unobscured Type I quasars, which are characterized by broad emission lines. The selected quasars exhibited a range of redshifts between 0.6 and 3.41, with a median redshift of approximately 1.68.
The study’s findings revealed that the radio-loudness fraction for these quasars is estimated at 5%, aligning with previous observations from other quasar samples. Notably, the research indicated that the proportion of quasars with radio emissions dominated by AGN is lower than findings from other studies within the MIGHTEE sample. The astronomers hypothesized that this discrepancy may arise from the lower radio flux-density limit of the images, enhancing sensitivity to lower radio luminosities linked to star formation.
Moreover, the analysis highlighted a significant increase in the fraction of potential starburst galaxies among higher redshift quasars, jumping from 31-38% to 63% for sources at the highest redshifts. This trend suggests that identifying whether AGN dominate total radio emissions becomes increasingly complex as redshift increases.
Implications for Future Research
The authors of the study emphasize that the heightened incidence of starbursts in quasars at higher redshifts complicates the application of the “radio-excess” method for determining AGN dominance in radio emissions. They concluded by urging a reevaluation of methods for selecting and analyzing AGNs to account for these nuanced findings.
This research not only contributes to the understanding of quasar properties but also poses important considerations for future studies in astrophysics. The work was rigorously reviewed and fact-checked, reinforcing its credibility within the scientific community.
For more information, refer to the original study by Sarah V. White et al titled “MIGHTEE: A first look at MIGHTEE quasars,” available on arXiv.
Science
AI and Biotechnology Set to Revolutionize Global Crop Production

A comprehensive review published in the journal Nature has unveiled significant potential for artificial intelligence (AI) and biotechnology to transform global crop production. Coordinated by an international team of researchers, including experts from Aberystwyth University, the study outlines strategies to strengthen food systems against the challenges posed by climate change, pests, and a growing population.
The collaborative research team, which encompasses scientists from China, the USA, and various countries in Europe, has proposed a systematic approach to integrate AI with advanced techniques such as genome editing, protein design, high-throughput phenotyping, and omics technologies. These methods facilitate an in-depth analysis of the genetic and chemical profiles of plants, offering a pathway to develop crops that are not only more productive but also sustainable and resilient to climate challenges.
Professor John Doonan, Director of the National Plant Phenomics Centre at Aberystwyth University’s Institute of Biological, Environmental and Rural Sciences (IBERS), emphasized the transformative nature of these tools. He stated, “Think of it like designing and building a bridge. We now have the tools to engineer crops with similar precision — combining biological insights with AI to build plants that can withstand drought, disease, and other stresses.”
Innovative Techniques for Sustainable Farming
The review highlights several innovative applications of AI in agriculture. Researchers assert that AI can effectively predict optimal gene combinations for enhanced yield, nutritional content, and stress tolerance. Additionally, it can facilitate the design of novel proteins that bolster plant defenses and improve overall performance. By integrating complex datasets, AI can also enable faster and more informed breeding decisions.
Professor Doonan further underscored the importance of building resilience into crops, stating, “This is about building resilience into our crops from the ground up. By uniting AI with cutting-edge biotechnology and sustainable farming practices, we can future-proof food production for generations to come.”
The work aligns with IBERS’ strategic focus on developing resilient crops and has received backing from the Biotechnology and Biological Sciences Research Council (BBSRC) through its Resilient Crops programme, as well as support from the Engineering and Physical Sciences Research Council (EPSRC) as part of its AI for Net Zero initiative.
The implications of this research are far-reaching. As global food demands intensify, leveraging AI and biotechnology could play a crucial role in addressing food security challenges. The review serves as a significant step towards integrating these advanced technologies into agricultural practices, paving the way for a more sustainable future.
The full review was published last week in Nature, marking a pivotal moment in the ongoing discourse about the intersection of technology and agriculture. As the world grapples with environmental changes and population growth, the fusion of AI with biotechnology presents a promising avenue for creating resilient agricultural systems that can adapt to an evolving landscape.
Science
Moon Brightens as July 26 Sees Waxing Crescent Phase

The moon entered its Waxing Crescent phase on July 26, 2025, providing a glimpse of its gradual brightness. During this phase, only 4% of the lunar surface is visible from Earth, making it challenging to see any features without specialized equipment. This marks the second day of the lunar cycle, which spans approximately 29.5 days, according to data from NASA.
As the moon orbits Earth, varying angles between the Sun, Moon, and Earth create different lunar phases. This cyclical pattern results in eight distinct phases, from the New Moon to the Full Moon, each offering unique visual characteristics. Currently, with limited visibility, observers will find it difficult to discern any details on the moon’s surface, even with binoculars or telescopes.
Understanding the Lunar Cycle
The lunar cycle begins with the New Moon, where the moon is positioned between Earth and the Sun, rendering it invisible. As the cycle progresses, the Waxing Crescent phase emerges, characterized by a small sliver of light appearing on the right side of the moon for those in the Northern Hemisphere. Following this, the First Quarter showcases half of the moon illuminated, while the Waxing Gibbous indicates more than half is lit but not yet full.
The next significant lunar event will occur on August 9, 2025, when the moon reaches its Full Moon phase. In contrast, the last full moon took place on July 10, 2025. As the cycle continues, the moon will transition through the Waning Gibbous, Last Quarter, and eventually to the Waning Crescent before returning to the New Moon.
The Visual Experience
For enthusiasts eager to observe the moon, understanding the phases enhances appreciation for this celestial body. Although tonight’s Waxing Crescent phase offers limited visibility, it sets the stage for the more brilliant Full Moon in a couple of weeks. Each phase offers a unique opportunity for stargazers and photographers alike to engage with the night sky.
In summary, the moon’s visibility will continue to evolve as the lunar cycle progresses, inviting both amateur astronomers and casual observers to witness its transformation. While the Waxing Crescent phase may not provide much to see, anticipation builds for the more illuminated phases ahead.
Science
Moon Phase Update: Waxing Crescent Illuminates Night Sky Today

The moon is currently in the Waxing Crescent phase as of July 26, 2025, becoming progressively brighter each night. This phase marks the second day of the lunar cycle, during which only 4% of the moon’s surface is visible from Earth, according to the NASA Daily Moon Observation. Tonight, observers will find little to see, as the limited illumination makes it nearly impossible to spot any features on the moon’s surface, even with binoculars or a telescope.
Understanding the Lunar Cycle
The lunar cycle consists of eight distinct phases, taking approximately 29.5 days to complete. This phenomenon occurs as the Sun illuminates varying portions of the moon while it orbits Earth. The phases of the moon, which include the New Moon, First Quarter, Full Moon, and others, reflect how much sunlight is visible from our vantage point on Earth.
The upcoming full moon will occur on August 9, following the last full moon on July 10. Each phase serves as a reminder of the moon’s continuous dance with the Earth and the Sun, creating a captivating display for sky watchers.
The Eight Phases of the Moon
To clarify, here is a brief overview of the eight primary moon phases:
– **New Moon**: The moon is positioned between Earth and the Sun, rendering it invisible to observers on Earth.
– **Waxing Crescent**: A small portion of the moon’s surface begins to light up on the right side.
– **First Quarter**: Half of the moon is illuminated, creating the appearance of a half-moon.
– **Waxing Gibbous**: More than half of the moon is lit, but it has not yet reached full illumination.
– **Full Moon**: The entire face of the moon is visible and brightly illuminated.
– **Waning Gibbous**: The moon starts to lose light on the right side.
– **Last Quarter (or Third Quarter)**: Another half-moon phase occurs, but now the left side is lit.
– **Waning Crescent**: A thin sliver of light remains on the left side before the moon returns to darkness.
This systematic progression of phases offers a unique opportunity to observe how the moon changes night by night, enhancing our understanding of celestial mechanics and the beauty of the night sky. As the moon continues its journey, enthusiasts and casual observers alike can look forward to the bright spectacle of the upcoming full moon in just a few weeks.
Science
Scientists Discover Muscle Health as Natural Alternative to Viagra

Researchers at the Baylor College of Medicine in Houston, Texas, have discovered that improving muscle health may serve as a natural alternative to conventional treatments for erectile dysfunction (ED). This finding could offer a new pathway for the more than 18 million men in the United States who experience difficulties with erections.
Erectile dysfunction is characterized by the inability to achieve or maintain an erection. The most commonly prescribed medications for ED include phosphodiesterase-5 (PDE5) inhibitors, such as sildenafil, known widely as Viagra. While effective, these medications can lead to side effects like headaches, nausea, and dizziness, and can be costly, with brand-name Viagra priced between $65 to $140 per tablet.
The research team analyzed data from 32 previous studies that examined the correlation between muscular strength and sexual function. Their findings indicated strong links between muscle quality and erectile function, sexual desire, and overall sexual satisfaction.
Exercise and Diet: Key Factors in Sexual Health
The researchers concluded that maintaining skeletal muscle through nutrition and physical activity significantly enhances erectile and overall health outcomes. They noted, “Therapies that target sexual function and muscle health simultaneously, such as testosterone and L-carnitine, may further benefit sexual function.”
Dr. Mohit Khera, a co-author of the study, emphasized the importance of exercise in reversing erectile dysfunction. He stated, “Regular physical activity can improve blood flow, reduce inflammation, manage weight, and address psychological factors, all of which contribute to erectile function.” His earlier research indicated that engaging in at least 160 minutes of exercise per week, including strength training, greatly improved erectile function, particularly among men with severe ED.
Alongside exercise, diet plays a crucial role in managing ED. Notably, L-carnitine, an amino acid found in red meat, poultry, and fish, has been highlighted as a potential remedy for erectile dysfunction.
The Growing Concern of ED Among Younger Men
Erectile dysfunction is becoming increasingly common, particularly among men over the age of 40. In the United States, over 3.5 million prescriptions for sildenafil were filled in 2022 alone. While occasional difficulties can stem from stress, fatigue, or alcohol consumption, persistent issues may indicate underlying health problems such as high blood pressure, diabetes, or psychological conditions that warrant discussion with a healthcare provider.
Recent health trends have highlighted a worrying increase in erectile dysfunction cases among younger men. UK-based doctor Babak Ashrafi reported a 46 percent rise in men under 30 seeking help for ED compared to the previous year. This surge is believed to be linked to the increasing consumption of pornography, which can affect sexual arousal and expectations.
Dr. Ashrafi noted, “While men between the ages of 45 and 54 are most likely to experience erectile difficulties, younger men are increasingly requesting treatment.” He cautioned that excessive exposure to explicit online content can alter how men respond to real-life sexual encounters, potentially leading to difficulties in arousal.
The research conducted by the Baylor College of Medicine offers a promising perspective on addressing erectile dysfunction. By focusing on muscle health through exercise and diet, men may find effective, natural solutions to enhance their sexual health without relying solely on pharmaceuticals. Future studies are needed to further elucidate these findings and investigate the long-term benefits of combined therapies targeting both sexual and muscle health.
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