# Ancient Homo Naledi Fossils Reveal Potential Female-Only Burial Site Protein analysis of ancient tooth enamel suggests a mysterious, sex-specific burial practice. - **Source:** [Latest Science News -- ScienceDaily](https://brifing.si/source/0eef8637-6c5b-4e79-8f5b-6c9c6b36cf16) - **Published:** 2026-11-11 - **Topic:** [science](https://brifing.si/c/science) - **Original article:** - **On Brifing:** https://brifing.si/s/5e405274-c8cb-4542-ad33-cb73207465cd ## Discovery in Rising Star Cave Scientists exploring South Africa's Rising Star Cave system have uncovered evidence suggesting a burial site used exclusively by female Homo naledi. This extinct human relative lived between 335,000 and 241,000 years ago. The discovery, published in the journal Cell, marks a significant milestone in understanding the social behaviors of ancient hominin species. ## Analyzing Ancient Protein Fragments Researchers examined 23 teeth from at least 20 different individuals to investigate the lack of physical variation among fossils. By using gentle acid etching, the team successfully recovered tiny protein fragments known as peptides from the tooth enamel. This non-destructive technique allowed for detailed analysis while preserving the integrity of the fossils. ## Absence of Male Genetic Markers The research team specifically searched for Amelogenin-Y, a protein produced by a gene on the male Y chromosome. Surprisingly, no evidence of this marker was found in any of the samples. Specialists at the University of York confirmed the proteins were genuinely ancient and not the result of modern contamination during testing. ## Implications for Social Customs If the Dinaledi Chamber was indeed reserved for females, it suggests surprisingly elaborate social customs among Homo naledi. Such practices might indicate symbolic burial traditions previously thought to be exclusive to Homo sapiens. These findings provide a rare window into the community organization and death rituals of our ancient human relatives. ## Alternative Genetic Explanations Researchers caution that an all-female site is not the only possible interpretation of the data. It is possible that the population lived in extreme isolation, leading to a mutation where the gene responsible for Amelogenin-Y disappeared. In this scenario, some individuals could be male despite lacking the standard protein marker for identification. ## Tooth Enamel as Biological Vault Tooth enamel serves as an ideal carrier for genetic information because it is the hardest tissue in the human body. It effectively shields proteins from environmental contamination for hundreds of thousands of years. This protective quality allowed the team to successfully extract data that would have been impossible to recover from bone fragments. ## Largest Hominin Protein Study This project represents the largest collection of individuals from an extinct hominin species ever examined using ancient protein analysis. By involving over 10 institutions, including the University of Copenhagen and the University of York, the study sets a new standard for how researchers can extract biological data from deep time fossil remains. ## Future of Evolutionary Research Whether the fossils represent a female-only site or a unique genetic anomaly, the discovery reshapes our understanding of Homo naledi. It demonstrates that proteins in teeth can reveal social and biological clues that bones alone cannot provide. Future studies will likely continue to explore these complex burial traditions and community structures. ## Sources covering this story - https://www.sciencedaily.com/releases/2026/11/261110042558.htm — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._