A Late Glacial family at Trollesgave. Denmark

YesMicrowear analysis is applied to reconstruct the function and social organisation at the Late Glacial site of Trollesgave, Denmark. As with Bromme Culture sites in general, the lithic assemblage consists of primarily three types of tools. There is a strong association between these types and their use: end scrapers for dry hide scraping; burins for working hard material, primarily bone; and tanged points primarily for projectile tips. Nearly all divergence from this pattern can be referred to as the activities of children, the products and workshops of which have previously been identified. Based on the combined information from microwear analysis, flint knapping and spatial distribution of artefacts, the assemblage is inferred as the traces of a single family hunting (and fishing) occupation.Danish Council for Independent Research (FKK ref. no. 273-08-0424

Consumer Demand for Milk and the Informal Dairy Sector Amidst COVID-19 in Nairobi, Kenya

Background The coronavirus disease 2019 (COVID-19) pandemic has had large negative effects on countries’ economies and individual well-being throughout the world, particularly in low- and middle-income countries. Pandemic-related changes in behavior and government restrictions in Kenya may have negatively affected food supply chains and household food access; however, the empirical evidence is currently limited. Objectives The study explored changes in informal milk markets, dairy consumption, and food insecurity among low-income households in urban and periurban Nairobi, Kenya, following the start of the COVID-19 pandemic in the country. Methods Baseline data on milk sales and consumption were collected in late 2019 from dairy vendors operating in the informal sector and their dairy customers. We conducted 2 longitudinal telephone surveys with the same study participants in July and September–October 2020, respectively. Results At the first follow-up, the volume of milk sold by informal vendors had dropped by 30% compared with their baseline level, and the volume of milk from informal markets consumed by households decreased by 23%. By the second follow-up, the volume of milk sold and consumed had recovered somewhat but remained lower than the volume observed 1 y prior in the same season. Large reductions in the consumption of other animal–sourced products were also observed. The rate of food insecurity increased by 16 and 11 percentage points in the first and second follow-up periods, respectively, compared with baseline

Donahue R (2005) The elemental chemistry of lithic microwear: an experiment

Abstract This paper examines the ability of elemental analysis to distinguish microwear traces on stone tools. Our research hypothesised that cleaning procedures of experimental specimens may have heavily influenced previous studies in this area. Experimental flakes are used and cleaned by two alternative methods before laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is applied to study use-wear chemistry. The results show that elementally recognisable traces remain on stone surfaces even with severe cleaning. Also studied were archaeological sickle blades from two sites in Northern England. The results were counterintuitive demonstrating that experimentally validated models potentially require extensive modification and clarification before being applied to archaeological material. This research identifies methodological problems and errors concerning cleaning within previous experimental studies and highlights new directions for this quantitative analytic approach in microwear analysis

Long Distance Logistic Mobility as an Organising Principle Among Northern Hunter-Gatherers: A Great Lakes Middle Holocene Settlement System

NoConcepts of residential and logistic mobility are applied to survey assemblages from multiple decades of research along the interior drainages of central lower Michigan. Drawing on the ethnographic record of boreal hunter-gatherers and archaeological interpretations of long-distance logistic mobility from the Mesolithic of northern England and continental Europe, it is argued that the importance of logistic mobility is underrepresented in summaries of northern hemisphere hunter-gatherers. Reconstruction of Middle Holocene environments suggests that the resource structure of the central Michigan uplands was one that fostered use of logistic mobility, and that interior Middle Archaic assemblages and site structures reveal special function activities systemically tied to residential and other special function sites at lower coastal elevations, as well as currently submerged under Lake Huron. We conclude that rising levels of Lake Huron ca. 4500 B.P. resulted in decreased land area, population packing, and a consequent shift to residential mobility by the Late Archaic. Further, the results of this analysis can serve as a comparative framework for recognizing the role of logistic mobility in the evolution of hunter-gatherer adaptive strategies in other regions

The Chronology of Abrupt Climate Change and Late Upper Palaeolithic Human Adaptation in Europe

Nohis paper addresses the possible connections between the onset of human expansion in Europe following the Last Glacial Maximum, and the timing of abrupt climate warming at the onset of the Lateglacial (Bölling/Allerød) Interstadial. There are opposing views as to whether or not human populations and activities were directly forced by climate change, based on different comparisons between archaeological and environmental data. We review the geochronological assumptions and approaches on which data comparisons have been attempted in the past, and argue that the uncertainties presently associated with age models based on calibrated radiocarbon dates preclude robust testing of the competing models, particularly when comparing the data to non-radiocarbon-based timescales such as the Greenland ice core records. The paper concludes with some suggestions as to the steps that will be necessary if more robust tests of the models are to be developed in the future

Regional Settlement Systems in Mesolithic Northern England: Scalar Issues in Mobility and Territoriality.

NoCurrent models of the Mesolithic settlement and mobility systems of northern England have largely resulted in a highly constrained view of the spatial use of the changing postglacial landscape. The ethnography of northern hemisphere hunter-gatherers in North America is at odds with such interpretations. It can be shown that in mid and high latitude forested environments mobile hunter-gatherers (a) use large areas on a seasonal basis and (b) engage in long distance logistic mobility. The application of these observations to the Mesolithic of northern England leads to reappraisal of both the spatial scope of regional settlement systems, and the degree to which upland and coastal environments are employed in the subsistence¿settlement strategy. The results are improved appreciation for the process of colonization and the ¿filling in¿ of the region as well as a more dynamic view of regional Mesolithic mobility systems, both of which have important implications for the role of sites such as Star Carr in regional context

Genotoxicity assessment of birch-bark tar - a most versatile prehistoric adhesive

In the Mesolithic, birch-bark tar was commonly utilized across Europe and much of Asia as an adhesive to bind, seal and coat surfaces, but also quite frequently it was found to be chewed. The tar is known to contain biomarker triterpenoid compounds like betulin, crucial in preserving food and for medical applications. Aqueous, ethanolic and DMSO extracts were prepared from solid birch-bark tar and evaluated in vitro for the induction of DNA damage using Comet, micronucleus and sister-chromatid-exchange assays. Additionally, apoptosis induction was assessed. For the ethanolic extract, only the Comet assay showed a significant increase of DNA damage. All three extracts were able to significantly induce apoptosis. Thus, birch-bark tar seems capable of inducing genotoxic damage as well as apoptotic effects possibly originating from the triterpenoids’ antimicrobial properties. We examine why prehistoric tar is found with tooth marks, the beneficial effects of birch-bark tar, and evidence for increased genotoxic risk upon exposure

Intrinsic religiosity reduces intergroup hostility under mortality salience

Results of three studies indicate that intrinsic religiosity and mortality salience interact to predict intergroup hostility. Study 1,conducted among 200 American Christians and Jews, reveals that under mortality salience, intrinsic (but not extrinsic or quest) religiosity is related to decreased support for aggressive counterterrorism. Study 2, conducted among 148 Muslims in Iran, demonstrates that intrinsic religiosity predicts decreased out-group derogation under mortality salience. Study 3, conducted among 131 Polish Christians, shows that under mortality salience, priming of intrinsic religious concepts decreases support for aggressive counterterrorism