While much of the public debate about self-driving cars focuses on safety, a new national study from the University of California San Diego reveals Americans’ doubts about driverless cars aren’t just about the fear of a crash. Many Americans also fear the technology’s economic ripple effects — especially job losses in driving and delivery work and the possibility that automated vehicles (AVs) could widen income inequality.

Forest damage in Europe caused by wildfires, storms and bark beetle outbreaks is projected to increase compared to recent decades under all analysed climate scenarios, according to a new international study, published in the scientific journal Science, with contributions from the Potsdam Institute for Climate Impact Research (PIK). 

A unique Rubisco subunit from the hornwort plant carries a built-in extension that enables the enzyme to cluster into carbon-concentrating structures like algae, according to a new study – an innovation that successfully triggered similar condensates when introduced into Arabidopsis plants. The findings reveal a novel and evolutionarily independent solution for Rubisco condensation in land plants and open the door for engineering similar systems in agricultural crops to potentially boost nutrient efficiency and yield. Rubisco, or ribulose-1,5-biphosphate carboxylase/oxygenase, is the central enzyme responsible for carbon fixation in photosynthesis, but it also reacts with oxygen, leading to energy-wasting photorespiration. Many algae reduce this inefficiency by concentrating CO₂ around Rubisco inside specialized microcompartments called pyrenoids, which can dramatically boost local CO₂ levels and improve photosynthetic efficiency. This adaptation has received increasing attention, given its potential to increase yields in crop plants. Rubisco clustering is typically driven by specialized linker proteins that have evolved independently across lineages. However, these linkers often bind Rubisco in species-specific ways, and none of the known linker proteins are directly compatible with plant Rubisco, limiting their introduction to crop plants. Here, Tanner Robison and colleagues report the discovery of a distinctive variant of the Rubisco small subunit (RbcS) from the hornwort plant Anthoceros agrestis that provides a new solution to this challenge. According to Robison et al., this variant carries an ~100-amino acid extension at its C-terminal, termed the Sequestration Associated Region (STAR). Unlike previously known algal systems, which rely on separate linker proteins that bind Rubisco externally, RbcS-STAR appears to embed the condensation mechanism directly into the enzyme itself. In experiments, the authors show that attaching the STAR domain to native Arabidopsis RbcS was sufficient to trigger the formation of Rubisco condensates within chloroplasts. Further biochemical and structural analyses further revealed the molecular interactions that drive the assembly of these condensates. In a related Perspective, Moritz Meyer and Howard Griffiths discuss the study in greater detail.

The Buck Institute for Research on Aging today announced the launch of Healthspan Horizons, a new initiative designed to address one of the most urgent challenges in modern medicine: how to measure, understand, and extend healthspan—the years of life spent in good health.