Using the James Webb Space Telescope (JWST), astronomers obtained high-contrast coronagraphic images of the protoplanetary disk around the young, nearby star TW Hydrae. Results of the observational campaign, published July 27 on the preprint server arXiv, shed more light on the nature of this disk.
The left-right asymmetry of South African butterfly lilies (genus Wachendorfia) has been regarded as a classic evolutionary puzzle for more than a century. Due to the mirror-image arrangement of the floral parts, the plants achieve efficient cross-pollination. The molecular basis of this arrangement has now been uncovered by an international team led by the University of Potsdam.
Nitrogen gas is abundant in Earth's atmosphere, but most living organisms can't readily use it. Only a subset of microbes with enzymes known as nitrogenases can break nitrogen gas apart and convert it into ammonia.
More than 1,000 years ago, two babies were tucked away in an abandoned Roman toilet channel. Yet, despite what the location suggests, they were cherished, not discarded.
How do students actually use AI learning assistants? A new research paper by IU International University of Applied Sciences provides the first robust answers to this question. For the study "Using AI-based Learning Assistants in Higher Education: A Large-Scale Descriptive Analysis," the research team led by Prof. Dr.-Ing. Kristina Schaaff, Dr. Valerie Hekkel and Quintus Stierstorfer analyzed anonymized usage data from approximately 77,000 IU online students who were using the Learning Companion Syntea at the time of the study.
Since returning to power, President Donald Trump's administration has approved five pesticides considered by many to be PFAS "forever chemicals," a class of toxic substances facing bans and increasing restrictions around the world.
Most sensors are designed to do only one thing: detect what passes through them. But what if a sensor could do more? To create a new generation of technology, researchers have looked to living systems for inspiration. If a sensor could detect molecules, could it also remember previous interactions and selectively respond to them?
Using spectral data from the Dark Energy Spectroscopic Instrument (DESI), astronomers have gained some of the clearest evidence yet that white dwarf stars are accreting debris from disintegrating exoplanets. Captured while DESI was unable to study its primary targets: distant galaxies, the results provide unprecedented insights into the chemical makeup of rocky exoplanets, revealing compositions remarkably similar to the planets and asteroids of our own inner solar system.
"An island of biodiversity in a sea of monoculture": This is how a recent study characterized the Pimentel Barbosa Indigenous Territory (TIPB), located in the northeastern part of Mato Grosso state in Brazil's Central-West region. The study showed that the area's human occupation patterns and vegetation cover have remained largely unchanged for four decades. Meanwhile, the surrounding area has been altered by the expansion of livestock ranching, soybean farming and the construction of major highways (BR-158 and BR-163), which are part of Brazil's efforts to extend its agricultural frontier. The TIPB covers 329,000 hectares (1,270 square miles) and was home to 2,369 people in 2022, according to a census by the Brazilian Institute of Geography and Statistics (IBGE).
As parasites become increasingly resistant to existing drugs, researchers at the University of California, Riverside, are working to develop a new generation of treatments for two serious infectious diseases: malaria and babesiosis.
