A recent study combining genetic analysis and archaeological evidence provides new insight into the final phase of Neanderthals in Europe, revealing a dramatic population turnover and a sharp decline in genetic diversity prior to their extinction around 40,000 years ago. Led by Professor Cosimo Posth at the University of Tübingen, the research traces how environmental pressures and demographic shifts reshaped the fate of Neanderthals during the Late Pleistocene.
For hundreds of thousands of years, Neanderthals occupied Europe, with evidence suggesting a continuous presence from roughly 400,000 to 40,000 years ago. However, their population history has remained poorly understood due to limited genetic data. This study focuses specifically on the period between 60,000 and 40,000 years ago, when their numbers dwindled and their extinction approached.
The research team analyzed mitochondrial DNA (mtDNA) extracted from the teeth and bones of ten newly studied individuals from sites across Belgium, France, Germany, and Serbia. These samples were combined with 49 previously sequenced mtDNA datasets. Mitochondrial DNA, while less comprehensive than nuclear DNA, is often better preserved and provides valuable insights into maternal lineages over long time scales.
By integrating genetic findings with archaeological records from the ROAD database, the researchers reconstructed population changes across both space and time. Their results show that around 75,000 years ago, Europe’s Neanderthals experienced a major population collapse likely triggered by severe Ice Age climatic conditions. As environments became increasingly harsh, populations retreated and became geographically concentrated, particularly in southwestern France, which acted as a climatic refuge.
From this refuge, a small surviving group gave rise to a new population that began expanding across Europe around 65,000 years ago. Remarkably, nearly all Late Neanderthal individuals analyzed—from Iberia to the Caucasus—descend from this single lineage. This indicates a near-total replacement of earlier, more genetically diverse populations with a much more homogeneous group.
The study also identified a second critical turning point. Using statistical modeling, researchers found that Neanderthals underwent a rapid population decline between 45,000 and 42,000 years ago. This drop brought their numbers to a minimum shortly before their extinction. The genetic evidence suggests that this final population was not only small but also highly uniform, lacking the diversity typically associated with long-term survival and adaptability.
Low genetic diversity can have serious consequences for a species. It reduces resilience to environmental change, increases vulnerability to disease, and limits the ability to adapt to new conditions. In the case of Late Neanderthals, their genetic homogeneity—combined with possible geographic isolation into small groups—may have significantly contributed to their disappearance.
Overall, the study paints a picture of a species that endured major climatic challenges but ultimately could not recover from repeated population bottlenecks. The final generations of Neanderthals were descendants of a single surviving group, spread thinly across Europe, and facing declining numbers and limited genetic variation. These factors, alongside competition and interaction with modern humans, likely sealed their fate, marking the end of a long and complex chapter in human evolution.
https://phys.org/news/2026-03-europe-late-neanderthals-descended-population.html