Virtual Reconstruction & Analysis of AC12

AIN Paper: Virtual Reconstruction and Analysis of Arene Candide 12: Evidence for Early European Artificial Cranial Modification

Aidian Sasenarine
Department of Anthropology, City College of New York
ANTH 20300: Human Origins
Professor Julie Lozano
November 26, 2025

Introduction

Human populations have been intertwined in cultural practice throughout the course of history. Some of the more extreme practices include significantly modifying the human body which often signals identity, status, or affiliation. One of the more vibrant examples of this is the artificial modification of the cranium (ACM). This mind bending practice involves intentionally reshaping an infant’s skull using binding and compression techniques (Mori et al., 2025). This is not a one off-shot practice as such ideas have been documented globally. However, the European Late Upper Paleolithic time-period appears to be the birthplace of this cultural practice. Evidence overall on this topic is limited during this time period, but the Arene Candide Cave (AC12) in Italy offers a rare opportunity to explore this practice. The present study aims to determine whether the infant craniums in this cave are a result of intentional modification in Europe through comparisons to infant craniums in the Late Upper Paleolithic, Mesolithic, and Neolithic Italians (Mori et al., 2025). To strengthen this study the Arene Cave was also juxtaposed to known cranium modification adjustments and also pathological states. CT scans and virtually reconstructed cranium models analyzed through geometric morphometrics allow for quantitative hard data for comparisons (Mori et al., 2025). If this Candide Cave case was proven to be intentional modification it would be significant as it would be the earliest known evidence of cranial modification in Europe. This would shed light on symbolic behavior, social organization and cultural practice within Upper Paleolithic Italy (Mori et al., 2025). Building from this, the following section will provide more insight into the methodology of comparative samples, 3D reconstruction, and morphometric analyses.

Methodology
For this study the researchers took a sample of 46 crania from Italy over the three mentioned time periods (Mesolithic, Neolithic, and Late Upper Paleolithic). These also included pathological craniums and known artificially modified heads. These were taken from catalogues, museums, and many sites. These craniums were then placed into a 3D scanner and a CT scan. This saved 3D meshes of the craniums for analysis. The analysts then used mirroring and geometric morphometric tools to rebuild any missing segments which completed the data base of all craniums. These missing pieces reconstruction were put back meticulously by capturing 20 specific landmarks and 129 semi-landmark spots to capture the overall cranium (Mori et al., 2025). To actually compare, a processing analysis technology standardizes the skull so that they all have the same size, rotation, and position so they can be compared. Then another analysis technology was implemented to identify the main way their craniums varied. A typicality probability tested whether the Cave skulls fit naturally into any of the three groups: later occurring modification, natural skulls, or pathological states. These methods allow us to evaluate Arene Cave cranial shape relative to natural, modified, and pathological specimens (Mori et al., 2025).

Analysis and Discussion
Summary of the Article
This information builds upon what was stated in the introduction and methods, but gives more insight into the actual contents of the article. To restate, the study investigates early evidence of artificial cranial modification (ACM) in Late Upper Palaeolithic humans from the Arene Candide Cave, Italy (AC12). Researchers compared these craniums through various analytical tools and assessed whether the infant skulls matched other natural infant skulls, modified infant skulls, or pathological infant skulls defects (Mori et al., 2025). The findings strongly suggest that the AC12 infant crania’s features indicate deliberate modification as they varied statistically from unmodified crania from other Late Upper Palaeolithic, Neolithic, and Mesolithic samples (Mori et al., 2025). Geometric morphometric analyses show that the landmark and semilandmark markings of the AC12 samples matched those of artificially modified specimens of known modifying cultures in later years (Mori et al., 2025). Furthermore, these findings are atypical, meaning that it does not fit within the normal range of variation for unmodified individuals.
Due to this inclination for deliberate human modification, the groups may have developed strong complex behaviors. This includes identity expression, social signaling, or group affiliation (analogous to modern societal affiliations) within prehistoric Europe (Mori et al., 2025). This comparative framework is crucial. By situating AC12 under modified specimens that details how these actions were self called “culturally deliberate”, it not only establishes the earliest known origin of such acts but also serves as a gateway to understanding complex social ideas at such an early stage of human life. Just as contemporary social groups may use tattoos to signal membership and status, AC12’s modified cranial shape likely functioned as a marker of such identity (Mori et al., 2025). This highlights the role of the body and its alteration in communicating social affiliation. Extrapolating this study, the research equipment is also important because it highlights how technological advances can transform interpretation in biological anthropology. Moreover, this result challenges assumptions that Palaeolithic populations did not have complex cultural behaviors and these cultural practices may have been more widespread and significant than first imagined (Mori et al., 2025).
Relevance and Contribution
Mori et al. (2025) research is highly relevant to biological anthropology because it investigates the earliest known evidence of artificial cranial modification (ACM). This provides insight into human behavior, cultural practices, and social identity which directly contributes to our understanding of how early humans used the body as a canvas for cultural expression. This study in particular contributes to the field of anthropology by showing that ACM in AC12 is not just a biological trait but a cultural signal. Much like tattoos, hair modification, or ritual markings, these reshaping are just an archaic method of communicating identity or belonging that is seen today. The authors suggest that the distinctive cranial shaping suggests that AC12 was part of a community determined to have highly visible, permanent markers for identity. This needs coordinated social participation, shared values, and recognition of group boundaries. Furthermore, they state that this pushes back any ideas or assumptions that symbolic behavior intensified only in later populations such as the Late Holocene. This is imperative as it not only details what happened in these Paleolithic times, but also engages with why it is meaningful socially (Mori et al., 2025). Moreover, this aligns with the goal within biological anthropology, to measure the why not just the what.
At the same time, this study’s reliance on analogies to later, well documented ACM traditions does induce a layer of uncertainty. The comparative dataset that this research used, although seems methodologically sound, draws heavily from periods with clear evidence of social stratification and roles. To apply these frameworks to a Late Upper Paleolithic context risks overstating intentionality. Since unusual morphologies can emerge naturally, away from pathology, or through non-cultural processes, coming to the conclusion that these skull structures are a definite result of cultural processes is a bit of an oversight. Furthermore, the reshaping of lost pieces of these craniums were modeled off of craniums from later populations where cranium evidence is not scant. This could have unfairly influenced the AC12 dataset which can skew the results. Overall, the geometric morphometric data makes deliberate modification plausible, but to what extent was this modification cultural or to the degree of influence these researchers take from known samples may dampen the viability of their conclusions.
Despite these limitations, AC12 contributes to meaningful ongoing discussions about early identity-making practices. The specimen complicates simple models of basic “hunter-gatherer” groups. It suggests that there was to some extent group affiliation, status signalling, or ritual practices. This would open a new avenue of study within the biological anthropological field as it would expose another generation of populations where deliberate human modifications could occur. Even though the actuality of cultural influence is in doubt, this new study now allows for other biological anthropologists to study further into whether these markings are deliberate or not. Mori et al. ‘s (2025) study is the root of a new tree that identified the start of a potentially modified cranium, but is also the invitation for all biological anthropologists to reconsider how early European groups expressed belonging and used the body as a social canvas.

Personal Insight and Justification
I chose this article because it is important to realize that no information in any field is 100% factual, and this article stresses that. Especially within the sciences, things that are considered to be completely figured out, you never know when new evidence will come out which completely disproves what was said before. In this article the new information that comes to light about artificial cranial modification forces biological anthropologists to rethink how “primitive” prehistoric groups are usually portrayed. Moreover, it is striking to think that civilizations 13,000 years ago were already thinking about how to physically differentiate their own within a given population. Even today, this is still going on as people style their hair, clothes, or even personality to match their own family analogous to how early Paleolithic populations did it such a time ago. The AC12 caught my eye especially because these modifications are made on infants. Infants usually are not strong enough to undergo intense body modification let alone modification on their skull. This further intensifies how deeply important this practice was to the people within this population as these modifications are made at such a young age. I find it fascinating that such cultural practice precedes life and well-being of a child. That level of intentionality suggests social organization, cultural values, and group identity in ways I didn’t expect from Late Upper Paleolithic Europe. Reading Mori et al. (2025) wasn’t just about learning about a past population, it also opened my eyes to how much symbolic behavior is overlooked in deep history, and how much of older history has been dismissed. Overall, the collective package that this article presents including: ground-breaking discoveries, clear rebuttal of once common knowledge, its continuity with actions that are still practiced today, and the overarching bizarre mechanisms of modifying the skull of an infant, draws me to this study in particular.

4. Conclusion
Taking everything into account from the analysis and discussion, the findings presented by Mori et al. (2025) shows how AC12 cranium represents far more than an usual collection of fossils. It highlights that the AC12 cranial sample is a rare, early evidential piece of history that is going to change the course of biological anthropology for the future. It provides clear evidence that contradicts commonly accepted ideas that there was a lack of cultural complexity in the Late Upper Paleolithic communities. Through comparisons of AC12 to natural, modified, and pathological crania, the study demonstrated that its distinctive shape is most consistent with deliberate alternation. This alludes to social practices that extend beyond survival, into group belonging, and even potentially dangerous. Taking a deeper dive into this research reveals how modern tools like 3D image reconstruction and geometric morphometrics allow us to reinterpret fragmentary remains with greater, but not 100%, confidence. With this research being so new, the cultural practices being guessed, and with much of the evidence having to be “reshaped”, it is hard to conclusively say that these cranium modifications are not due to other external forces or natural aging in babies. Despite this, the evidence underscores how deeply rooted symbolic behavior is in human history. Starting from body modifications today with tattoos to potential body modification from these late paleolithic times, societies have had a deep understanding and feeling for belonging. Altogether, this research contributes significantly to biological anthropology by expanding our understanding of early European cultural practices and reminding us that from prehistory to even today, we reshape our bodies, minds and goals. Reflecting on our past, we see how humans changed, stayed the same, and revisited previously believed concepts about our ancestors.

5. References (APA)
Mori, T., Sparacello, V.S., Riga, A. et al. Early European evidence of artificial cranial modification from the Italian Late Upper Palaeolithic Arene Candide Cave. Sci Rep 15, 27792 (2025). https://doi.org/10.1038/s41598-025-13561-8