The Bronze Age of Eurasia (around 3000-1000 BC) was a period of major cultural changes. However, there is debate about whether these changes resulted from the circulation of ideas or from human migrations, potentially also facilitating the spread of languages and certain phenotypic traits. We investigated this by using new, improved methods to sequence low-coverage genomes from 101 ancient humans from across Eurasia. We show that the Bronze Age was a highly dynamic period involving large-scale population migrations and replacements, responsible for shaping major parts of present-day demographic structure in both Europe and Asia. Our findings are consistent with the hypothesized spread of Indo-European languages during the Early Bronze Age. We also demonstrate that light skin pigmentation in Europeans was already present at high frequency in the Bronze Age, but not lactose tolerance, indicating a more recent onset of positive selection on lactose tolerance than previously thought.

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This article reviews recent research into the archaeological interpretation and investigation of fortifications and enclosures during the Neolithic and Bronze Age in Europe. Recent methodological, technological, and cultural developments have expanded our understanding of the temporal, spatial, and formal variability of these features on the landscape. Interpretations of this variability also have varied with different theoretical trends in the discipline. We advocate a crosscultural approach that focuses on the occurrence of enclosures and fortifications over the long term at the continental scale. Such a macroscalar approach complements interpretive frameworks at the regional and microregional scales. The geographic and temporal distribution of these features indicates that social institutions associated with principles of segmentation and substitutability became formalized and tethered to the landscape during the Neolithic.

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In this study, we aim to extend the chronological, geographical, and societal scope of previous bioarchaeological research on infant diet and age at weaning in Britain in the past through the analysis of the large medieval and post‐medieval skeletal assemblage from St. Nicholas Kirk, Aberdeen, Scotland. Stable carbon and nitrogen isotope data were obtained from rib collagen from 67 sub‐adults across the two phases and were compared with mean adult female dietary isotope values. Nitrogen isotope data were modelled using the R Package WARN, along with previously published data sets, to provide quantitative age estimates for the commencement and completion of weaning at St. Nicholas Kirk and other medieval and post‐medieval sites. Data from Phase A (12th–15th century AD) suggest that breastfeeding may have continued up to and beyond the age of 2 years, likely in combination with other foods. This complements previously published data from urban and rural medieval contexts in England, highlighting similarities in infant feeding practices across very different contemporary populations. Data from post‐medieval Phase B at St. Nicholas Kirk (15th–18th century AD) give new insights into early modern period breastfeeding and weaning practices, indicating that weaning commenced soon after birth and was completed relatively early (within a year). These data bridge the gap between previously published studies on medieval and late 18th‐ to 19th‐century populations from the British Isles and suggest that trends observed at later urban sites may be rooted in preceding centuries, although the underlying reasons for this change are difficult to elucidate. Contributing factors may include the social and religious changes that occurred in the post‐reformation period, such as the decrease in the use of wet nurses, changes in the availability and acceptability of artificial feeding, increased urbanism, and even changes in the socio‐economic status of those interred in the Kirk.

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