The role of play objects and object play in human cognitive evolution and innovation

Abstract: In this contribution, we address a major puzzle in the evolution of human material culture: If maturing individuals just learn their parental generation’s material culture, then what is the origin of key innovations as documented in the archeological record? We approach this question by coupling a life-history model of the costs and benefits of experimentation with a niche-construction perspective. Niche-construction theory suggests that the behavior of organisms and their modification of the world around them have important evolutionary ramifications by altering developmental settings and selection pressures. Part of Homo sapiens’ niche is the active provisioning of children with play objects — sometimes functional miniatures of adult tools — and the encouragement of object play, such as playful knapping with stones. Our model suggests that salient material culture innovation may occur or be primed in a late childhood or adolescence sweet spot when cognitive and physical abilities are sufficiently mature but before the full onset of the concerns and costs associated with reproduction. We evaluate the model against a series of archeological cases and make suggestions for future research

Ginnerup Revisited. New Excavations at a Key Neolithic Site on Djursland, Denmark

New excavations of an enclosure-related site at Ginnerup on Djursland, Denmark, in 2020 resulted in the identification of several features containing depositions of marine shells. One of these, A4, is a natural depression with a fill comprised of four consecutively deposited layers, forming an undisturbed stratigraphy, dated by several 14C dates to between c. 3150 and 2950 BC. The oldest layer contained finds from phase MN A Ib of the Funnel Beaker culture, while the remaining three layers yielded finds from the latest Funnel Beaker culture on Djursland (MN A II/III, Ferslev style) with an upwardly increasing content of Pitted Ware culture elements, thereby allowing the emergence of this culture in Denmark to be followed for the first time. Preservation conditions for organic material were excellent due to a content of marine shells, mainly from oysters and mussels, in all layers. In this preliminary account, a survey of the material culture in the four layers is presented, together with 14C dates, zoological investigations of mammal and fish bones, isotope analyses (d13C, d15N and d34S) and aDNA analyses of mammal bones and examinations of plant macro-remains. The abundant bones of wild horses also hold a huge potential for zoological and genetic studies, the results of which can qualify the ongoing debate about the rewilding of horses in present-day Europe

Re-theorising mobility and the formation of culture and language among the Corded Ware Culture in Europe

Descriptive and Comparative Linguistic

Genomic Steppe ancestry in skeletons from the Neolithic Single Grave Culture in Denmark.

The Gjerrild burial provides the largest and best-preserved assemblage of human skeletal material presently known from the Single Grave Culture (SGC) in Denmark. For generations it has been debated among archaeologists if the appearance of this archaeological complex represents a continuation of the previous Neolithic communities, or was facilitated by incoming migrants. We sampled and analysed five skeletons from the Gjerrild cist, buried over a period of c. 300 years, 2600/2500-2200 cal BCE. Despite poor DNA preservation, we managed to sequence the genome (>1X) of one individual and the partial genomes (0.007X and 0.02X) of another two individuals. Our genetic data document a female (Gjerrild 1) and two males (Gjerrild 5 + 8), harbouring typical Neolithic K2a and HV0 mtDNA haplogroups, but also a rare basal variant of the R1b1 Y-chromosomal haplogroup. Genome-wide analyses demonstrate that these people had a significant Yamnaya-derived (i.e. steppe) ancestry component and a close genetic resemblance to the Corded Ware (and related) groups that were present in large parts of Northern and Central Europe at the time. Assuming that the Gjerrild skeletons are genetically representative of the population of the SGC in broader terms, the transition from the local Neolithic Funnel Beaker Culture (TRB) to SGC is not characterized by demographic continuity. Rather, the emergence of SGC in Denmark was part of the Late Neolithic and Early Bronze Age population expansion that swept across the European continent in the 3rd millennium BCE, resulting in various degrees of genetic replacement and admixture processes with previous Neolithic populations

Genomic Steppe ancestry in skeletons from the Neolithic Single Grave Culture in Denmark.

The Gjerrild burial provides the largest and best-preserved assemblage of human skeletal material presently known from the Single Grave Culture (SGC) in Denmark. For generations it has been debated among archaeologists if the appearance of this archaeological complex represents a continuation of the previous Neolithic communities, or was facilitated by incoming migrants. We sampled and analysed five skeletons from the Gjerrild cist, buried over a period of c. 300 years, 2600/2500-2200 cal BCE. Despite poor DNA preservation, we managed to sequence the genome (>1X) of one individual and the partial genomes (0.007X and 0.02X) of another two individuals. Our genetic data document a female (Gjerrild 1) and two males (Gjerrild 5 + 8), harbouring typical Neolithic K2a and HV0 mtDNA haplogroups, but also a rare basal variant of the R1b1 Y-chromosomal haplogroup. Genome-wide analyses demonstrate that these people had a significant Yamnaya-derived (i.e. steppe) ancestry component and a close genetic resemblance to the Corded Ware (and related) groups that were present in large parts of Northern and Central Europe at the time. Assuming that the Gjerrild skeletons are genetically representative of the population of the SGC in broader terms, the transition from the local Neolithic Funnel Beaker Culture (TRB) to SGC is not characterized by demographic continuity. Rather, the emergence of SGC in Denmark was part of the Late Neolithic and Early Bronze Age population expansion that swept across the European continent in the 3rd millennium BCE, resulting in various degrees of genetic replacement and admixture processes with previous Neolithic populations

The evolution of early symbolic behavior in Homo sapiens

Abstract: Early human symbolic behavior is challenging to address. We used ancient engravings from the South-African Blombos and Diepkloof archeological sites in a number of controlled cognitive experiments to qualify discussions about the early evolution of human symbolic traditions. We found that the engravings evolved over a period of 40 000 years to become more salient to the human eye, increasingly expressive of human intent, and easier to reproduce from memory. In other words, they became more effective ‘tools for the mind’. Our experiments suggest that the engravings served as decorations and expressions of socially-transmitted cultural traditions, but not as denotational symbolic signs, which has been previously assumed

Physical and psychological consequences of serious road traffic injuries, deliverable 7.2 of the H2020 project SafetyCube

SafetyCube aims to develop an innovative road safety Decision Support System (DSS) that will enable policy-makers and stakeholders to select the most appropriate strategies, measures and cost-effective approaches to reduce casualties of all road user types and all severities. Work Package 7 of SafetyCube is dedicated to serious road traffic injuries, their health impacts and their costs. This Deliverable discusses health impacts of (serious) road traffic injuries

Unraveling ancestry, kinship, and violence in a Late Neolithic mass grave

The third millennium BCE was a period of major cultural and demographic changes in Europe that signaled the beginning of the Bronze Age. People from the Pontic steppe expanded westward, leading to the formation of the Corded Ware complex and transforming the genetic landscape of Europe. At the time, the Globular Amphora culture (3300–2700 BCE) existed over large parts of Central and Eastern Europe, but little is known about their interaction with neighboring Corded Ware groups and steppe societies. Here we present a detailed study of a Late Neolithic mass grave from southern Poland belonging to the Globular Amphora culture and containing the remains of 15 men, women, and children, all killed by blows to the head. We sequenced their genomes to between 1.1- and 3.9-fold coverage and performed kinship analyses that demonstrate that the individuals belonged to a large extended family. The bodies had been carefully laid out according to kin relationships by someone who evidently knew the deceased. From a population genetic viewpoint, the people from Koszyce are clearly distinct from neighboring Corded Ware groups because of their lack of steppe-related ancestry. Although the reason for the massacre is unknown, it is possible that it was connected with the expansion of Corded Ware groups, which may have resulted in competition for resources and violent conflict. Together with the archaeological evidence, these analyses provide an unprecedented level of insight into the kinship structure and social behavior of a Late Neolithic community

Review of Kristin Armstrong Oma’s The Sheep People: The Ontology of Making Lives, Building Homes and Forging Herds in Early Bronze Age Norway

Bokanmeldelse av Kristin Armstrong Oma’s The Sheep People: The Ontology of Making Lives, Building Homes and Forging Herds in Early Bronze Age Norwa

Toys as Teachers: A Cross-Cultural Analysis of Object Use and Enskillment in Hunter--Gatherer Societies

Studies of cultural transmission—whether approached by archaeological or ethnographic means—have made great strides in identifying formal teaching and learning arrangements, which in turn can be closely aligned with models of social learning. While novices and apprentices are often in focus in such studies, younger children and their engagement with material culture have received less attention. Against the backdrop of a cross-cultural database of ethnographically documented object use and play in 54 globally distributed foraging communities, we here discuss the ways in which children make and use tools and toys. We provide a cross-cultural inventory of objects made for and by hunter–gatherer children and adolescents. We find that child and adolescent objects are linked to adult material culture, albeit not exclusively so. Toys and tools were primarily handled outside of explicit pedagogical contexts, and there is little evidence for formalised apprenticeships. Our data suggests that children’s self-directed interactions with objects, especially during play, has a critical role in early-age enskillment. Placed within a niche construction framework, we combine ethnographic perspectives on object play with archaeological evidence for play objects to offer an improved cross-cultural frame of reference for how social learning varies across early human life history and what role material culture may play in this process. While our analysis improves the systematic understanding of the role and relevance of play objects among hunter–gatherer societies, we also make the case for more detailed studies of play objects in the context of ethnographic, archival and archaeological cultural transmission research