Bjørn Peare Bartholdy

Extraordinaire

I’m a PhD in Archaeology working to learn more about what people ate in the past, using methods from archaeology and oral microbiology. I’m dedicated to keeping my research and findings accessible, transparent, and reproducible. I enjoy exploring different ways to communicate my findings, in addition to the more conventional publishing methods.

I also work as a Data Steward at TU Delft, where I support researchers in research data management and Open Science. I provide trainings on these topics, as well as participating in Data Carpentry and Software Carpentry workshops on R, git, and unix.

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Projects

Academic projects

Leiden University Open Science Survey

A survey conducted at Leiden University in collaboration with Open Science Community Leiden and Academia in Motion.

PhD dissertation

My somewhat alternative PhD disseration. The content is pretty conventional, but I am publishing it as I write.

teethr

An R package for tooth stuff.

RchaeoStats

Openly available teaching materials on R and Statistics.

Random s**t

The Bioarchaeologist’s Guide

A website with resources for bioarchaeologists, with content ranging from relevant to highly irrelevant.

keepitsecret (R package)

An R package that generates (and evaluates) random passphrases based on the Lord of the Rings novel.

Publications

Bartholdy, B. P., Velsko, I. M., Gur-Arieh, S., Fagernäs, Z., Warinner, C., & Henry, A. G. (2025). Assessing the validity of a calcifying oral biofilm model as a suitable proxy for dental calculus. Open Research Europe, 5, 96. https://doi.org/10.12688/openreseurope.19129.1

Bartholdy, B. P., Hasselstrøm, J. B., Sørensen, L. K., Casna, M., Hoogland, M., Beemster, H. G., & Henry, A. G. (2024). Multiproxy analysis exploring patterns of diet and disease in dental calculus and skeletal remains from a 19th century Dutch population. Peer Community Journal, 4. https://doi.org/10.24072/pcjournal.414

Bartholdy, B. P., & Henry, A. G. (2022). Investigating Biases Associated With Dietary Starch Incorporation and Retention With an Oral Biofilm Model. Frontiers in Earth Science, 10. https://doi.org/10.3389/feart.2022.886512

Bartholdy, B. P., Sandoval, E., Hoogland, M. L. P., & Schrader, S. A. (2020). Getting Rid of Dichotomous Sex Estimations: Why Logistic Regression Should be Preferred Over Discriminant Function Analysis. Journal of Forensic Sciences, 65(5), 1685–1691. https://doi.org/10.1111/1556-4029.14482

Bartholdy, B. P., Hoogland, M. L. P., & Waters-Rist, A. (2019). How old are you now? A new ageing method for nonadults based on dental wear. International Journal of Osteoarchaeology, 29(4), 622–633. https://doi.org/10.1002/oa.2758

Bartholdy, B. P., Hacking, K., Murchie, T. J., & Verwoerd, C. (2017). Dog Days on the Plains: A preliminary aDNA analysis of canid bones from southern Alberta and Saskatchewan. Canadian Journal of Archaeology, 41, 46–62.

Education

PhD Archaeological Science | Leiden University

MSc Osteoarchaeology | Leiden University

BSc Physical Anthropology | University of Calgary