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Comet 3I/ATLAS displays greenish hue in new Gemini North telescope images

Gemini North captured new images of Comet 3I/ATLAS after it reemerged from behind the sun on its path out of the solar system. The data were collected during a Shadow the Scientists session—a unique outreach initiative that invites students around the world to join researchers as they observe the universe on the world's most advanced telescopes.

A partner's death can hit harder when finances are unstable

Grief over the sudden death of a partner leads 1 in 6 surviving partners to experience such severe psychological distress that they begin taking sedatives or antidepressants. If the death also results in a noticeable loss of income, the share of widows and widowers using psychotropic medication is significantly higher. Economic insecurity greatly amplifies the mental strain after the death of a loved one, researchers conclude.

[Health Policy] The right to health: indigenous data sovereignty in Canada during and beyond the COVID-19 pandemic

The COVID-19 pandemic disproportionately impacted Indigenous Peoples in Canada, highlighting preexisting health inequities. These disparities were exacerbated by inadequate data management policies across Canadian governments, which contribute to inaccurate health information and access challenges for Indigenous Nations. Indigenous data sovereignty, which recognizes the right of Indigenous Peoples to govern their own data, has been identified as essential for achieving self-determination and improving health outcomes.

Researchers map Africa's snaring crisis, calling for sustainable solutions

The thunder of a rifle echoes across the Savannah. Antelope scatter as birds of all feathers take to the air. A dull thud signals that the marksman's shot was true. The horn from the felled rhino will command more money on the black market than the hunter could otherwise make in a year.

An unrelenting tule fog

An atmospheric phenomenon occurring over much of California was unmistakable in satellite imagery in late autumn 2025. Fog stretching some 400 miles (640 kilometers) across the state's Central Valley appeared day after day for more than two weeks in late November and early December. Known as tule (TOO-lee) fog, named after a sedge that grows in the area's marshes, these low clouds tend to form in the valley in colder months when winds are light and soils are moist.

Roundworms discovered in Great Salt Lake are new to science

Nematodes discovered in the Great Salt Lake belong to at least one species that is new to science, and possibly two. A University of Utah research team has published a new paper characterizing the tiny roundworm. The team gave it a name that honors the Indigenous tribe whose ancestral lands include the lake.

Songbirds swap colorful plumage genes across species lines among their evolutionary neighbors

People typically think about evolution as a linear process where, within a species, the classic adage of "survival of the fittest" is constantly at play. New DNA mutations arise and get passed from parents to offspring. If any genetic changes prove to be beneficial, they might give those young a survival edge.

Femtosecond lasers push the limits of nanostructures for thermal engineering

Femtosecond laser-induced periodic surface structures can be used to control thermal conductivity in thin film solids, report researchers from Japan. Their innovative method, which leverages high-speed laser ablation, produces parallel nanoscale grooves with unprecedented throughput that is 1,000 times stronger than conventional approaches, strategically altering phonon scattering in the material.

Genomic study reveals how vascular plants adapt to aquatic environments

Aquatic plants are specialized evolutionary groups adapted to life in water. They play critical roles as food and medicinal supplies (e.g., lotus root and foxnut) and industrial raw materials (e.g., reeds), as well as in ecological restoration. While most aquatic lineages have independently evolved from terrestrial ancestors, the genomic dynamics underlying this adaptation remain largely unexplored.

Earthquake rupture along Main Marmara Fault shows eastward progression towards Istanbul

In April 2025, the Main Marmara Fault below the Sea of Marmara in northwestern Türkiye experienced its largest earthquake in over 60 years. In a study published in Science, a team of researchers led by Prof. Dr. Patricia Martínez-Garzón from the GFZ Helmholtz Center for Geosciences in Potsdam, Germany, analyzes nearly two decades of seismic data framing the 2025 April magnitude M 6.2 earthquake.

Unlocking the Potential of Risk-Based Screening for Breast Cancer

Breast cancer is the most frequently diagnosed malignant neoplasm among women in the US and remains a leading cause of cancer mortality. In 2025, an estimated 316 950 women were diagnosed with invasive disease and 42 170 died, reflecting a lifetime risk of approximately 1 in 8. These patterns in breast cancer morbidity and mortality underscore the continued need for advances in prevention, screening, and treatment.

Sea reptile's tooth shows that mosasaurs could live in freshwater

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in North Dakota and believed to belong to an animal that could reach a length of 11 meters.

Plant hormone allows lifelong control of proteins in living animal for first time

Researchers have found a way to control protein levels inside different tissues of a whole, living animal for the first time. The method lets scientists dial protein levels up or down with great precision during the animal's entire life, a technological advance which can help them study the molecular underpinnings of aging and disease.

[Comment] Residency growth in Mexico: expansion and alignment challenges

In Mexico, entry into medical residency depends on the National Examination for Medical Residency Applicants (ENARM, for its Spanish name: Examen Nacional de Aspirantes a Residencias Médicas), a highly competitive test administered by the Comisión Interinstitucional para la Formación de Recursos Humanos para la Salud (CIFRHS). Performance on the ENARM is closely linked to the quality, accreditation, and geographic location of medical schools, candidates from private and northwestern institutions often outperform those from public or southern schools, highlighting enduring disparities in medical education and access to postgraduate training.

Enhancing machine-learning interatomic potentials for advanced materials modeling

Machine learning is transforming many scientific fields, including computational materials science. For about two decades, scientists have been using it to make accurate yet inexpensive calculations of interatomic potentials, that are mathematical functions that express the energy of a system of atoms and are an ingredient to simulate and predict the stability and properties of materials. But machine learning by itself is not a magic wand, and many problems remain.