A set of eight Neanderthal teeth from a single cave in southern Poland has yielded the first collection of mitochondrial genomes from multiple Neanderthal individuals found north of the Carpathian Mountains. The teeth, according to a study published in Current Biology on 20 April 2026, belong to at least seven individuals who occupied the same shelter roughly 92,000 to 119,000 years ago. Three of those individuals carried identical maternal-line DNA, pointing to direct family ties within a small group that used the cave across at least one generation.
Shared maternal DNA and what it tells us about site fidelity
The central finding from the Stajnia Cave study is not simply that Neanderthals lived in Poland during the late Middle Pleistocene. Isolated teeth from the site had already established that much. What changes the picture is the recovery of eight new mitochondrial genomes and the discovery that three individuals shared identical maternal-line mtDNA, according to the University of Wroclaw’s summary of the research. Identical maternal haplotypes across multiple individuals at one site strongly suggest that a family group, linked through a common maternal ancestor, returned to or remained at Stajnia Cave over a sustained period.
That pattern challenges the simplest version of Neanderthal mobility, which pictures small bands roaming continuously without fixed reference points. If a mother and her offspring, or close maternal relatives, used the same cave across years or decades, the group was practicing something closer to seasonal or multi-year site fidelity. The cave served not as a random overnight stop but as a place worth coming back to, possibly because of its position relative to prey migration routes, water, or shelter from harsh Central European winters. The dating window of approximately 92,000 to 119,000 years ago spans a period of significant climate shifts tied to Marine Isotope Stages, making repeated use of the same refuge all the more telling about how these groups managed environmental uncertainty.
The shared maternal line also hints at social structure. In many hunter-gatherer societies, patterns of residence after mating-whether males or females move between groups-shape which genetic lineages cluster at particular sites. While mitochondrial DNA alone cannot determine whether Neanderthals were predominantly patrilocal or matrilocal, the tight clustering of one maternal haplotype at Stajnia Cave is consistent with a small, kin-based group using the shelter as a recurring home base.
How eight teeth produced seven identities
Stajnia Cave has been a known Neanderthal site for over a decade. Earlier work documented a Neanderthal lower molar through dental metrics and comparative anatomy, and a separate study identified a child’s tooth at the same site using morphological assessment. Those findings confirmed Neanderthal presence but could not reveal relationships between individuals or tell researchers whether the teeth belonged to members of the same group.
The new study, published in Current Biology, combined ancient DNA extraction with morphological analysis and radiocarbon dating to build a fuller picture. According to the University of Wroclaw, the analysis includes four newly discovered Neanderthal teeth alongside previously known specimens. There is a minor discrepancy in the reporting: the study describes eight teeth total from the assemblage, while the institutional summary specifies four as newly discovered. The difference likely reflects the inclusion of teeth identified in earlier excavation seasons that had not yet undergone genetic analysis. Regardless of how the count is divided between old and new finds, the genetic results cover all eight specimens and identify at least seven distinct individuals.
Each tooth was first examined to confirm Neanderthal morphology and to rule out duplication from the same jaw. Ancient DNA protocols were then applied in clean-room conditions to minimize contamination from modern human handlers. Because mitochondrial DNA is present in many more copies per cell than nuclear DNA, it is usually the first-and sometimes the only-genetic material recoverable from heavily degraded fossils. Sequencing the mitochondrial genomes from all eight teeth allowed the team to distinguish individual lineages and to recognize when two or more teeth must have come from the same person.
An earlier paleogenetic study had already extracted an mtDNA genome from one Stajnia tooth, cataloged as S5000, establishing that the cave held some of the oldest Neanderthal genetic material in Central-Eastern Europe. That single genome, however, could only speak to one person. The new batch of eight mitogenomes transforms a dot on the map into a population-level data point, allowing researchers to compare maternal lineages within the same site for the first time at this geographic range.
By comparing the Stajnia sequences to a broader database of Neanderthal mitogenomes from Western Europe and the Caucasus, the authors could also place the Polish individuals on a wider evolutionary tree. The Stajnia lineages fall within the established Neanderthal variability, but their age and geographic location expand the known northern extent of these populations during the late Middle Pleistocene and suggest that Central Europe was not merely a transient corridor but part of a longer-term habitat.
Geological context and the limits of dental evidence
Stajnia Cave’s stratigraphy has been documented through multiple dating approaches, including optically stimulated luminescence, uranium-thorium, and radiocarbon methods. A detailed site-context study used these techniques to correlate the cave’s sediment layers with Marine Isotope Stages, showing that the deposits span long periods of environmental change and situating the Neanderthal-bearing levels within specific climatic phases of the Pleistocene; that work is reported in a geological analysis of the cave.
That geological framework helps anchor the teeth in time, but it also highlights a limitation: artifacts and fossils found in different layers could represent visits separated by thousands of years, not a single family gathering. Cave sediments can be disturbed by water flow, animal burrowing, or human activity, further complicating efforts to tie particular finds to precise episodes of occupation.
The identical maternal mtDNA among three individuals narrows that temporal gap considerably. Mitochondrial DNA is inherited only from the mother and accumulates mutations at a relatively slow rate. For three people to carry the same haplotype, they almost certainly lived within a few generations of each other, even if the sediment layers they were found in cannot resolve time at that fine a scale. The genetic clock, in other words, provides a resolution that stratigraphy alone cannot.
The presence of a child’s tooth in the assemblage adds another dimension. A mixed-age group at a single site is consistent with a residential camp rather than a hunting station used only by adults. Earlier morphological work on the juvenile tooth from Stajnia Cave pointed to a young Neanderthal who likely died or shed the tooth during everyday activities, rather than as part of a specialized butchering or tool-making event. Combined with the evidence for repeated visits by closely related individuals, this supports the interpretation of Stajnia as a recurring home base where Neanderthals slept, ate, cared for children, and weathered environmental stress.
What Stajnia adds to the Neanderthal map
Viewed against the broader record of Neanderthal fossils and tools, the Stajnia Cave assemblage fills in a key stretch of Central Europe. It demonstrates that Neanderthals were established north of the Carpathians during a period of fluctuating climate, and that at least some groups organized their movements around familiar shelters rather than wandering randomly across the landscape.
The new mitochondrial genomes also contribute to debates about how isolated or connected Neanderthal populations were. The Stajnia lineages show both local clustering and broader affinities, suggesting that while individual groups may have been small and kin-based, they were not completely cut off from neighboring bands. Occasional exchanges of mates or movements of families across regions would have been enough to maintain the genetic continuity seen across the Neanderthal range.
Future work at Stajnia Cave and comparable sites may recover nuclear DNA, which would allow researchers to probe paternal lineages, admixture patterns, and individual kin relationships in far greater detail. For now, the eight teeth from southern Poland show how much can be learned from even the smallest fossils: not only who was there and when, but how they organized their lives around places that mattered enough to return to, generation after generation.
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*This article was researched with the help of AI, with human editors creating the final content.
