The genetic legacy of African Americans from Catoctin Furnace

"To honor and remember": An ethical awakening to African American remains in museums

In 2021, amid surging activism in the Movement for Black Lives, the Smithsonian Institution's possession of the remains of thousands of African Americans drew widespread attention. In response, the Smithsonian and its National Museum of Natural History undertook a series of steps to assess these remains and to develop a policy for returning as many as possible to descendants and descendant communities, under changes that would apply to all non-Native American remains in Smithsonian collections. This paper reviews the actions taken to date and the work that is still in progress or planned. I contextualize these steps more broadly within an "ethical awakening" to African American remains that have long been present, studied, and displayed in collections across the museum community in the United States, where other institutions have faced similar challenges and changes.

Exercises in ethically engaged work in biological anthropology

An ethical paradigm shift currently taking place within biological anthropology is pushing scholars to envisage and develop paths toward more ethical futures. Drawing from case studies in our own teaching, research, and fieldwork experience, we reflect on the complex, diverse, and dynamic nature of ethical considerations in our field. We discuss the acquisition and institutional narrative of a human osteological teaching collection at the University of Louisville as an embodiment of structural apathy turned structural violence, and the need for professional guidance in the potential retirement of deceased individuals from our classrooms. In documented collections (i.e., the Robert J. Terry Collection), we share our process and scholarly reemphasis of the humanity of a deceased individual through contextualized analysis (i.e., osteobiography and archival history) and postmortem agentive acts. Lastly, we present an archeological site in the U.S. Virgin Islands, which poses ethical concerns as biocultural bioarcheologists and archeologists attempt to negotiate the possible wishes of the deceased with the cultural value of reconstructing the community's otherwise undocumented past, all amidst the immediate threat of anthropogenic climate change. We offer these exercises and discussion in ethically engaged projects transparently and with an overarching admission that none are models for replication. Rather, at various stages in our careers and engagement with ethics, we acknowledge that progress is worthwhile, albeit challenging, and that proceeding forward collectively as biological anthropologists should be deliberate, reflexive, and compassionate for deceased individuals and their descendant communities, as well as among and between colleagues.

Improving data archiving practices in ancient genomics

Ancient DNA is producing a rich record of past genetic diversity in humans and other species. However, unless the primary data is appropriately archived, its long-term value will not be fully realised. I surveyed publicly archived data from 42 recent ancient genomics studies. Half of the studies archived incomplete datasets, preventing accurate replication and representing a loss of data of potential future use. No studies met all criteria that could be considered best practice. Based on these results, I make six recommendations for data producers: (1) archive all sequencing reads, not just those that aligned to a reference genome, (2) archive read alignments too, but as secondary analysis files, (3) provide correct experiment metadata on samples, libraries and sequencing runs, (4) provide informative sample metadata, (5) archive data from low-coverage and negative experiments, and (6) document archiving choices in papers, and peer review these. Given the reliance on destructive sampling of finite material, ancient genomics studies have a particularly strong responsibility to ensure the longevity and reusability of generated data.

Identification of the 18 World War II executed citizens of Adele, Rethymnon, Crete using an ancient DNA approach and low coverage genomes

In the Battle of Crete during the World War II occupation of Greece, the German forces faced substantial civilian resistance. To retribute the numerous German losses, a series of mass executions took place in numerous places in Crete; a common practice reported from Greece and elsewhere. In Adele, a village in the regional unit of Rethymnon, 18 male civilians were executed and buried in a burial pit at the Sarakina site. In this study, the first one conducted for a conflict that occurred in Greece, we identified for humanitarian purposes the 18 skulls of the Sarakina victims, following a request from the local community of Adele. The molecular identification of historical human remains via ancient DNA approaches and low coverage whole genome sequencing has only recently been introduced. Here, we performed genome skimming on the living relatives of the victims, as well as high throughput historical DNA analysis on the skulls to infer the kinship degrees among the victims via genetic relatedness analyses. We also conducted targeted anthropological analysis to successfully complete the identification of all Sarakina victims. We demonstrate that our methodological approach constitutes a potentially highly informative forensic tool to identify war victims. It can hence be applied to analogous studies on degraded DNA, thus, paving the path for systematic war victim identification in Greece and beyond.

The ancestry and geographical origins of St Helena's liberated Africans

The island of St Helena played a crucial role in the suppression of the transatlantic slave trade. Strategically located in the middle of the South Atlantic, it served as a staging post for the Royal Navy and reception point for enslaved Africans who had been "liberated" from slave ships intercepted by the British. In total, St Helena received approximately 27,000 liberated Africans between 1840 and 1867. Written sources suggest that the majority of these individuals came from West Central Africa, but their precise origins are unknown. Here, we report the results of ancient DNA analyses that we conducted as part of a wider effort to commemorate St Helena's liberated Africans and to restore knowledge of their lives and experiences. We generated partial genomes (0.1-0.5×) for 20 individuals whose remains had been recovered during archaeological excavations on the island. We compared their genomes with genotype data for over 3,000 present-day individuals from 90 populations across sub-Saharan Africa and conclude that the individuals most likely originated from different source populations within the general area between northern Angola and Gabon. We also find that the majority (17/20) of the individuals were male, supporting a well-documented sex bias in the latter phase of the transatlantic slave trade. The study expands our understanding of St Helena's liberated African community and illustrates how ancient DNA analyses can be used to investigate the origins and identities of individuals whose lives were bound up in the story of slavery and its abolition.