Francis Halzen Wins Nobel for Neutrino Astronomy
Francis Halzen has won the 2026 Nobel Prize in Physics for pioneering the IceCube Neutrino Observatory, which opened a new way to study the universe using high-energy neutrinos. Conceived in the late 1980s, IceCube embeds thousands of light sensors across a cubic kilometer of Antarctic ice to detect rare flashes produced when neutrinos interact with matter. Completed in 2011, the observatory soon identified high-energy neutrinos arriving from beyond the solar system, giving astronomers a new tool for probing extreme cosmic environments such as supermassive black holes. The Nobel Committee praised Halzen’s vision and scientific leadership, noting that IceCube also inspired other neutrino observatories worldwide. Halzen, a University of Wisconsin–Madison physicist, emphasized that the achievement depended on a large international collaboration. (New York Times)
Keto Diet Shows Opposing Cancer Effects
A ketogenic diet can have dramatically different effects on tumors in neighboring parts of the digestive tract, according to experiments from Massachusetts Institute of Technology. Cancer-prone mice fed a ketogenic diet developed more tumors in the small intestine than animals eating a control diet, even though the same diet suppressed tumor formation in the colon. Surprisingly, ketone bodies themselves were not responsible. Instead, increased fatty-acid oxidation activated PPAR proteins, causing intestinal stem cells to divide more rapidly and increasing opportunities for cancerous changes. Published in Nature, the findings underscore the danger of assuming a diet produces uniform effects throughout the body. The researchers emphasize that the experiments involved genetically engineered mice and do not demonstrate that ketogenic diets cause intestinal cancer in people. (ScienceDaily)
Human Brain Gene Can Still Jump
Scientists have discovered an unusual human gene that performs a cellular function while retaining the ability to move around the genome. BC200 originated millions of years ago from a transposable element, or “jumping gene,” and today is expressed primarily in neurons, where evidence suggests its RNA helps regulate protein production. Unlike most transposon-derived genes recruited for useful cellular roles, however, BC200 apparently never lost its mobility. Researchers at Cornell University uncovered the phenomenon after finding BC200 embedded inside molluscum contagiosum virus, suggesting the gene jumped from an infected human cell into the virus. Published in Science, the discovery raises intriguing evolutionary questions and possible medical ones: BC200 is abnormally expressed in several cancers and at elevated levels in brains affected by Alzheimer’s disease. (ScienceDaily)
Star Slowly Devours Its Brown Dwarf
Astronomers have discovered an extraordinary stellar system in which a tiny red dwarf is gradually siphoning material from a brown dwarf companion rather than swallowing it rapidly. ZTF J0440+2325 lies roughly 300 light-years from Earth, with the two objects orbiting each other every 87 minutes in a space small enough to fit inside the Sun. Observations and simulations show material overflowing from the roughly 25-Jupiter-mass brown dwarf and crashing directly onto the approximately 85-Jupiter-mass star, producing a hot spot. The transfer rate—about one hundred-thousandth of an Earth mass annually—is sufficiently slow that the process could continue for billions of years. Published in Nature Astronomy, the system represents the first observed case of one low-mass object steadily accreting material directly from another. (MIT News)
Ultrafast X-Rays Catch Energy Transfer in Action
Researchers have captured an unusually detailed view of one of nature’s fundamental energy-transfer mechanisms as it happens. A team led by Pacific Northwest National Laboratory combined ultrafast X-ray spectroscopy and scattering at SLAC’s Linac Coherent Light Source with quantum-chemistry calculations and molecular simulations. The experiments followed a light-triggered proton-coupled electron transfer reaction, revealing how changes in a molecule’s electronic structure occur alongside the reorganization of surrounding water molecules. Similar coordinated proton-and-electron movements underpin photosynthesis and many biological energy-conversion reactions. Published in Nature Communications, the work provides a new experimental method for investigating processes occurring on extraordinarily short timescales. Better understanding this molecular choreography could eventually aid the design of more efficient catalysts, fuel cells, flow batteries and artificial energy-harvesting systems. (ScienceDaily)
Disabled Women Face Cervical Screening Gap
Women with physical disabilities are substantially less likely to receive routine cervical-cancer screening than women without disabilities, according to a large U.S. medical-record study. Researchers examined records for 2.3 million women, including 15,727 with physical disabilities, tracking whether participants received cervical screening between 2016 and 2022. Only 63.5% of women with physical disabilities were screened, compared with 70.9% of women without disabilities; researchers calculated that disabled women were 21% less likely to undergo screening. The disparity appeared across age, racial and ethnic groups. Intriguingly, disabled women with at least some college education had screening rates comparable to nondisabled women. Published in JAMA Network Open, the findings highlight persistent accessibility barriers and suggest self-sampling for HPV could make cervical screening substantially easier for some patients with mobility limitations. (cidrap.umn.edu)