Astrophysicists led by a team from Trinity College Dublin have – for the first time – imaged a large number of exocomet belts around nearby stars, and the tiny pebbles within them. The crystal-clear images show light being emitted from these millimetre-sized pebbles within the belts that orbit 74 nearby stars of a wide variety of ages – from those that are just emerging from birth to those in more mature systems like our own Solar System.

A first-of-its-kind study found subtle, but distinct vowel pronunciations in Pacific Islanders attending more diverse schools compared to students in a predominately white high school. The findings support a long-held theory from cultural anthropology—there’s a stronger tendency for groups to differentiate along ethnic lines where more groups share the same social space.

Pioneering researchers of self-generated spin torques have discovered a new one, anomalous Hall torque, that completes a triad of torques likely present in all conductive spintronic materials. Dubbed the Universal Hall Torques, the triad have unique spin behavior favorable to cutting-edge technologies, like human brain-inspired computing that processes massive amounts of data with much greater efficiency.

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous — and highly debated — results had shown: The Universe is expanding faster than predicted by theoretical models, and faster than can be explained by our current understanding of physics. This discrepancy between model and data became known as the Hubble tension. Now, results published in the Astrophysical Journal Letters provide even stronger support to the faster rate of expansion.

A new tool could make it easier to study scarce plant molecules. Researchers co-led by the University of California San Diego have developed so-called microbial cell factories—using E. coli and yeast—to produce a special class of plant hormones, known as strigolactones, at unprecedented levels. By amplifying production of strigolactones, which occur in such low amounts in plants, researchers now have the ability to study these elusive plant molecules in much greater depth than before. The work could help improve sustainable agricultural practices by offering deeper insights into how plants make and use their natural hormones to adapt and survive.  

A mussel bed in Northern California is as healthy and biodiverse as it was about 80 years ago, when two young students surveyed it shortly before one was sent to fight in World War II. Resampling the site reveals a thriving mussel bed community that also shows the mark of climate change.

A mussel bed in Northern California is as healthy and biodiverse as it was about 80 years ago, when two young students surveyed it shortly before one was sent to fight in World War II. Resampling the site reveals a thriving mussel bed community that also shows the mark of climate change.

In 2018, a galaxy about 270 million light-years away from Earth exhibited a major increase in activity. It quieted down again by 2020—only to dramatically increase its output again in 2023. At that time, it began emitting radio waves at 60 times the previous intensity over just a few months, behavior which has never been monitored in real time for a supermassive black hole. Imaging also clearly shows a pair of oppositely directed plasma jets forming near the black hole and expanding outward over the course of 2023 – 2024. The observation of jet formation in real time is another first. The data will help scientists understand how and under what conditions black holes produce jets.