Scientists have shown for the first time that Antarctic krill show a stereotypical reaction in the presence of guano from Adélie penguins: they swim faster and make more turns over greater angles. It is unknown to what kind of water-borne chemical cues they respond, but the authors speculate that this behavior might be a universal escape response to the excreta of predators, irrespective of species.

A newly published study in the Journal of Cosmology and Astroparticle Physics JCAP has not detected any signals attributable to quantum gravity effects in the neutrinos observed by the underwater detector KM3NeT/ORCA in the Mediterranean Sea. However, the result is significant because it establishes new experimental limits on quantum decoherence in neutrino oscillations—a phenomenon that, if detected, could indicate the existence of quantum gravity effects, a crucial piece in our understanding of the Universe and its fundamental laws. The identified limits further contribute to the ongoing effort to bridge quantum mechanics and general relativity.

A recent study has unveiled a novel strategy to boost the efficiency of solar photovoltaic (PV) systems in agriculture, offering a solution to longstanding challenges. By integrating the Greylag Goose Optimization (GGO) algorithm with a seven-level inverter, the research team has achieved impressive advancements in maximum power point tracking (MPPT) and significantly reduced total harmonic distortion (THD). This innovation ensures more reliable and stable power for agricultural machinery, while also cutting operational costs and extending the lifespan of equipment.

A new analysis of data collected over three years by the Dark Energy Spectroscopic Instrument (DESI) collaboration provides even stronger evidence than the group’s previous datasets that dark energy, long thought to be a “cosmological constant,” might be evolving over time in unexpected ways. Dr. Mustapha Ishak-Boushaki, professor of physics at The University of Texas at Dallas, is co-chair of the DESI working group that interprets cosmological survey data gathered by the international collaboration.

The Dark Energy Spectroscopic Instrument used millions of galaxies and quasars to build the largest 3D map of our universe to date. Combining their data with other experiments shows signs that the impact of dark energy may be weakening over time — and the standard model of how the universe works may need an update.

A new data release from the Dark Energy Spectroscopic Instrument is now available for researchers to explore. The collection contains information on 18.7 million galaxies, quasars, and stars — the largest dataset of its kind ever shared.

Atomic nuclei with “magic numbers” of protons or neutrons in their nuclear shells are extremely stable. Nuclear physicists are especially interested in nuclei with doubly magic numbers—those that have full shells for both protons and neutrons. One example is the tin isotope Sn-100, which has 50 protons and 50 neutrons. To prepare for future work on Sn-100, researchers studied the properties of isotopes of indium as they approached 50 neutrons. This helps to demonstrate how adding single particles changes the properties of a nucleus.