Portunid crabs of the genus Charybdis De Haan, 1833 are among the most frequently reported marine invaders worldwide. Here, we report the first record of Charybdis (Archias) hoplites (Wood-Mason, 1877) outside its native Indo-West Pacific range, collected from the Test Estuary, Southampton Water, United Kingdom. Morphological and molecular analyses confirm the specimen’s identity and clarify diagnostic features useful for distinguishing C. (A.) hoplites from closely related taxa. This represents the northernmost record of any Charybdis species and suggests a long-distance dispersal event, associated with shipping activities in the Port of Southampton. Environmental data indicate that salinity and turbidity at the collection site are within known tolerances for Charybdis spp., although low winter temperatures may limit survival and establishment. The detection of this warm-water species in a major international port highlights the ongoing need to monitor non-native marine fauna.

Coal balls are our primary source of information about Pennsylvanian tropical peat swamps. They capture plant community composition and the complex ecological interactions between coeval terrestrial arthropods and plants. A small number of borings (or feeding tunnels) have been documented in permineralized and compression fossils from the Carboniferous Period. We report two borings filled with coprolites (fecal material) in a coal ball originating from the Mt. Rorah Coal Member (Tradewater Formation; Middle Pennsylvanian of Illinois, USA). Peels of the coal ball were prepared using the cellulose acetate peel method and digitized with a Zeiss Axio Zoom V16 microscope. The borings, measuring 3 cm and 6 cm in length, follow the transverse margin of Psaronius roots and are filled with two distinct types of uniformly shaped coprolites: type 1, ranging from 0.5–2 mm in diameter, and type 2, <60 μm in diameter. Both coprolite types consist of digested Psaronius root tissue and only occur in borings, with no signs of feeding damage observed in the surrounding plant tissues along the margins of the borings or the peel. The dimensions of the borings and morphology of type 1 coprolites suggest they were made by an early roachoid, millipede, or another terrestrial arthropod group. The distribution and content of type 2 coprolites indicate coprophagy, or secondary feeding on type 1 coprolites, likely by oribatid mites. These borings provide new insight into the life history of the organisms that created these tunnels, their role in litter decomposition, and the food webs of Pennsylvanian peat swamps.

Political science educators must take innovative approaches to respond to twenty-first-century classroom challenges. Simulation-based pedagogy can foster deep student engagement while developing strong peer relationships, encouraging empathy, and improving professional skills. There are many ways, however, to conduct simulations in political science courses. We argue that open-ended, multi-week simulations in which students participate as relative equals may be especially beneficial for effective learning. Although this “sandbox”-style approach to simulation learning is portable to other settings, we have used it in legislative politics courses focused on the US Senate. Drawing from our experiences and student reviews, we argue that simulations in which students can immerse themselves in a role for an extended period, focus on issues they care about, and learn from their mistakes and successes along the way create a uniquely valuable learning experience. Our approach can present challenges for instructors, but we believe it is flexible enough to be deployed in a variety of institutional settings and that any trade-offs are more than worth it.

We introduce semiframes (an algebraic structure) and investigate their duality with semitopologies (a topological one). Both semitopologies and semiframes are relatively recent developments, arising from a novel application of topological ideas to study decentralised computing systems. Semitopologies generalise topology by removing the condition that intersections of open sets are necessarily open. The motivation comes from identifying the notion of an actionable coalition in a distributed system – a set of participants with sufficient resources for its members to collaborate to take some action – with an open set, since just because two sets are actionable (have the resources to act) does not necessarily mean that their intersection is. We define notions of category and morphism and prove a categorical duality between (sober) semiframes and (spatial) semitopologies, and we investigate how key well-behavedness properties that are relevant to understanding decentralised systems transfer (or do not transfer) across the duality.

For $r\geq 3$ and $g= \frac {r(r+1)}{2}$, we study the Prym-Brill-Noether variety $V^r(C,\eta )$ associated to Prym curves $[C,\eta ]$. The locus $\mathcal {R}_g^r$ in $\mathcal {R}_g$ parametrizing Prym curves $(C, \eta )$ with nonempty $V^r(C,\eta )$ is a divisor. We compute some key coefficients of the class $[\overline {\mathcal {R}}_g^r]$ in $\mathrm {Pic}_{\mathbb {Q}}(\overline {\mathcal {R}}_g)$. Furthermore, we examine a strongly Brill-Noether divisor in $\overline {\mathcal {M}}_{g-1,2}$: we show its irreducibility and compute some of its coefficients in $\mathrm {Pic}_{\mathbb {Q}}(\overline {\mathcal {M}}_{g-1,2})$. As a consequence of our results, the moduli space $\mathcal {R}_{14,2}$ is of general type.

The aim of this review is to examine why cultural food security and cultural food sovereignty should be prioritised and embedded within conventional food security frameworks. It demonstrates how culturally grounded, community-driven approaches foster more just, sustainable, and empowering food systems for ethnically diverse, Indigenous, and local communities, while highlighting the limitations of conventional metrics that overlook socio-cultural, political, and ecological dimensions essential to resilience. Conventional food security focuses on access to sufficient, safe, and nutritious food, often sidelining access to culturally appropriate and spiritually meaningful foods that are integral to cultural identity and tradition (cultural food security) and the authority and decision-making power held by local people over their foodways (cultural food sovereignty). Its market-based, individualistic measurement paradigms further neglect collectivist, traditional, and spiritual food values, resulting in assessments that may conform to global standards yet produce flawed outcomes, misaligned interventions, and continued marginalisation of ethnically diverse, Indigenous and local communities. Drawing on socio-cultural, political, economic, and environmental frameworks, the review demonstrates how food sovereignty and cultural food security provide more sustainable, equitable, and empowering pathways for communities. It underscores the need for community-driven, culturally grounded food policies.

An ∼0.2-km-long gravel spit (1398 m above sea level) at Sunstone Knoll in the Sevier basin, Utah, prograded into Lake Gunnison, a shallow lake in the Sevier basin that overflowed northward into the Great Salt Lake basin during the regressive phase of Lake Bonneville. Six radiocarbon dates for Anodonta shells and one optically stimulated luminescence age, which overlaps with the uncertainty range of the radiocarbon dates, yield an age for spit development and therefore, the initiation of Lake Gunnison overflow, at ∼15.5 cal ka. This age is older than the age of a larger spit 8 m lower in elevation that ended its progradation in Lake Gunnison about 12 cal ka. Strontium isotope ratios of the Anodonta shells from Sunstone Knoll (0.71049, 0.71059, 0.71064) are within the range of values for Lake Gunnison. The new date from Sunstone Knoll is consistent with cosmogenic dates from the Provo shoreline for the initiation of the regressive phase of Lake Bonneville (about 70 m higher than the spit). The major climatic shift, which caused the lake water budget and hydrology to change from overflowing while the Provo shoreline was forming to closed-basin conditions during the regressive phase, occurred by about 16.5 cal ka.

COVID-19 lockdown restrictions forced several courts to conduct remote video or telephone hearings of cases. Many argue for the continued use of these hearing formats based on claims of increased transparency and access to justice. Recent research, however, has highlighted that virtual hearings may lead to unfair proceedings, especially in trial courts. Furthermore, this research suggests that technology gaps—for example, the lack of computer literacy among litigants—may impact case outcomes. In this article, we test whether the introduction of virtual hearings due to COVID-19 affected the way in which traffic courts adjudicated traffic tickets in Arkansas. Using an original dataset of all court cases that occurred in three Pulaski County courthouses in 2020, we find that courts were less likely to dismiss charges where hearings took place through videoconferencing. Further, using a difference-in-differences design, we find that this bias is mitigated when the technology used for the hearing is equalized among litigants. We suggest reasons for this effect and offer some recommendations to mitigate the biases inherent in virtual environments. Our results invite more research into the impact of remote communication technology on judicial behavior to ensure that the long-term use of virtual hearings guarantees equitable justice to all litigants.