Radiocarbon dates on charred plant remains are often used to define the chronology of archives such as lake cores and fluvial sequences. However, charcoal is often older than its depositional context because old-wood can be burnt and a range of transport and storage stages exist between the woodland and stream or lake bed (“inherited age”). In 1978, Blong and Gillespie dated four size fractions of charcoal found floating or saltating in the Macdonald River, Australia. They found larger fragments gave younger age estimates, raising the possibility that taphonomic modifications could help identify the youngest fragments. In 1978 each date required 1000s charcoal fragments. This study returns to a sample from the Macdonald River to date individual charcoal fragments and finds the inherited age may be more than 1700 years (mode 250 years) older than the collection date. Taphonomic factors, e.g., size, shape or fungal infestation cannot identify the youngest fragments. Only two fragments on short-lived materials correctly estimated the date of collection. In SE Australia, this study suggests that wood charcoal will overestimate the age of deposition, taphonomic modifications cannot be used to identify which are youngest, and multiple short-lived materials are required to accurately estimate the deposition age.

Recovering the agency, skill and innovation of archaeological field assistants from historical encounters is essential to interrogating processes of knowledge production, but is often hampered by access to appropriate archival sources and methods. We detail a field project from early twentieth-century Basutoland (modern-day Lesotho) that is unique both for its aim to salvage details of rock-art production as a dying craft and for its archive chronicling the project's intellectual journey from experiment to draft manuscripts to published work over more than three decades. We argue that critical historiographic attention to this archive offers a guide for examining the intimate dynamics of fieldwork and the effects of these micropolitics on the archaeological canon. We demonstrate how sustained attention to long processes of knowledge production can pinpoint multiple instances in which the usability of field assistants’ scientific knowledge is qualified, validated, or rejected, and in this case how an African assistant is transformed into an ethnographic interlocutor. For rock-art studies especially, this represents a need for interrogating the epistemic cultures—not just the content—of foundational historical data.

Ice shelves restrain flow from the Greenland and Antarctic ice sheets. Climate-ocean warming could force thinning or collapse of floating ice shelves and subsequently accelerate flow, increase ice discharge and raise global mean sea levels. Petermann Glacier (PG), northwest Greenland, recently lost large sections of its ice shelf, but its response to total ice shelf loss in the future remains uncertain. Here, we use the ice flow model Úa to assess the sensitivity of PG to changes in ice shelf extent, and to estimate the resultant loss of grounded ice and contribution to sea level rise. Our results have shown that under several scenarios of ice shelf thinning and retreat, removal of the shelf will not contribute substantially to global mean sea level (<1 mm). We hypothesize that grounded ice loss was limited by the stabilization of the grounding line at a topographic high ~12 km inland of its current grounding line position. Further inland, the likelihood of a narrow fjord that slopes seawards suggests that PG is likely to remain insensitive to terminus changes in the near future.

Antibiotics are not indicated for the treatment of bronchitis and bronchiolitis. Using a nationally representative database from 2006–2015, we found that antibiotics were prescribed in 58% of outpatient visits for bronchitis and bronchiolitis in children, serving as a possible baseline for the expanded HEDIS 2020 measure regarding antibiotic prescribing for bronchitis.

This article addresses a methodological lacuna in studies of African cultural property: states are rarely subjected to the same detailed ethnographic enquiry as communities local to heritage sites. I argue that this is the result of historical circumstances and disciplinary trends treating states as nebulous “up there” entities distinct from the grassroots—and, thus, subject to different modes of enquiry. I demonstrate a corrective approach through a historical ethnographic examination of the government of Lesotho’s archives, examining a period from 1991 to 1993 that saw early efforts to create a national monument at Thaba Bosiu. This detailed view reveals habits of thinking about heritage among bureaucrat-intellectuals, administrators, and international consultants. It offers new insights into how state actors articulated visions for new industries, public participation, and spirituality in public life as well as how to demonstrate incapacity to secure future development funds.

Currently, mark-making practices as a form of identification and proof of life are an unrealized resource. Over a three-year period, systematic walkover surveys were conducted on and within fortifications and other structures on the island of Alderney to locate historic and modern marks. The investigations presented in this article demonstrate the importance of non-invasive recording and examination of marks to identify evidence connected to forced and slave labourers, and soldiers present on the island of Alderney during the German occupation in World War II. Names, hand and footwear impressions, slogans, artworks, dates, and counting mechanisms were recorded electronically and investigated by using international databases, archives, and translation services. We discuss the value and challenges of interpreting traces of human life in the contexts of conflict archaeology and missing person investigations and underline the need for greater recognition of marks as evidence of past lives.

‘Outlaw’ is not a common category of archaeological thought but it is perhaps more useful than meets the eye. ‘Outlaws’ are typically viewed as contingent on legal and capitalist systems; they are, I suggest, also material, affective phenomena that draw our attention to how transgression, dissent and disorder are conceived through archaeological thinking. Here, I outline some ways in which ‘outlaw’ figures are ‘good to think with’, particularly for historical and colonial contexts but also for broader, more global frontier situations. Through three sketches of archetypal ‘outlaws’ in southern Africa's recent past, I consider where these disruptive figures draw attention to how mobility, violence, rebellion and state imagination (and the limits thereof) have been imagined through material misbehaviours.

The structure and kinematics of the broad line region in quasars are still unknown. One popular model is the disk-wind model that offers a geometric unification of a quasar based on the viewing angle. We construct a simple kinematical disk-wind model with a narrow outflowing wind angle. The model is combined with radiative transfer in the Sobolev, or high velocity, limit. We examine how angle of viewing affects the observed characteristics of the emission line. The line profiles were found to exhibit distinct properties depending on the orientation, wind opening angle, and region of the wind where the emission arises.

At low inclination angle (close to face-on), we find that the shape of the emission line is asymmetric, narrow, and significantly blueshifted. As the inclination angle increases (close to edge-on), the line profile becomes more symmetric, broader, and less blueshifted. Additionally, lines that arise close to the base of the disk wind, near the accretion disk, tend to be broad and symmetric. Single-peaked line profiles are recovered for the intermediate and equatorial wind. The model is also able to reproduce a faster response in either the red or blue sides of the line profile, consistent with reverberation mapping studies.

Cattle raiding is iconic of the colonial frontier in Southern African history and historiography. Incorporating settlers and Africans as aggressors and victims alike, archives and ethnohistories depict raiding as thieving, subverting authority, and inciting conflict. Despite the in-depth anthropological attention given to ‘Bushman raiding’ and frontier commandos, comparatively little work has focused on the social and cultural function of cattle raiding within chiefdoms: that is, examining cattle raiding as socially embedded rather than simply transgressing authority and property ownership. This article explores how these narratives of ‘disorder’ have been constructed, and some alternative perspectives on nineteenth-century cattle raiding as a social institution. Through vignettes drawing on archival, archaeological, ethnographic and folkloric evidence, this article offers glimpses of what narratives of the recent past could look like if views of raiding-as-disorder were revisited and revised. I draw attention to where raids were illegal versus illicit, the role of cattle as social agents, and the logic underpinning designations of raiding as resistance. Developing a view of raiding as social practice permits us to interrogate archival perceptions of raiders as outlaws and raids as analogues for warfare, thus enabling more nuanced investigations of conflict in Southern Africa's past.

Over the last four decades researchers have cast the Maloti-Drakensberg Mountains as a marginal refuge for ‘Bushmen’ amidst constricting nineteenth-century frontiers. Rock art scholarship has expanded on this characterisation of mountains as refugia, focusing on heterogeneous raiding bands forging new cultural identities. Here, we propose another view of the Maloti-Drakensberg: a dynamic political theatre in which polities that engaged in illicit or ‘heterodox’ activities like cattle raiding and hunter-gatherer lifeways set the terms of colonial encounters. We employ the concept of the ‘interior world’ to refigure the region as one fostering subsistence and political behaviours that did not conform to the expectations of colonial authority. Paradoxically, such heterodoxies over time constituted widespread social logics within the Maloti-Drakensberg, and thus became commonplace and meaningful. We synthesise historical and archaeological evidence (new and existing) to illustrate the significance of the nineteenth-century Maloti-Drakensberg, offering a revised southeast-African colonial landscape and directions for future research.