Neanderthals were not a single, unchanging population of “cave people.” They lived across a wide area for hundreds of thousands of years, and their behaviour varied with local environments and history. Recent research has added concrete examples to that picture: a molar with evidence of deliberate intervention, turtle remains associated with Neanderthal occupation, and new genomes that help trace relationships among late populations. Each finding answers a narrow question; none alone explains every Neanderthal community.
A tooth that may record treatment
A lower molar from Chagyrskaya Cave in the Altai region of Siberia bears a deep opening in a decayed area. In a 2026 study, researchers compared its shape and surface traces with experimental drilling and with damage that could result from wear or after burial. They argued that a stone tool was probably used to reach the diseased part of the tooth while the individual was alive. The tooth belongs to a Neanderthal from a site occupied roughly 49,000 to 70,000 years ago.
The interpretation is significant but should stay precise. The researchers did not find a dental instrument beside the tooth, nor can they identify who performed the procedure or whether it relieved pain. Tool marks and the location of the opening support intentional intervention, but the action is reconstructed from the tooth itself. It is evidence that someone may have tried to manage a serious dental problem, not proof of an organised medical practice.
Small prey in a broader diet
At Neumark-Nord in Germany, a 2026 analysis examined European pond-turtle remains from an interglacial landscape used by Neanderthals. The researchers reported repeated patterns of shell damage and processing that are consistent with people collecting and opening turtles. The assemblage contains many shells, so the result is stronger than an isolated animal bone in a campsite. It indicates that these foragers sometimes used a small, local resource alongside larger game.
That does not mean turtles were a staple everywhere, or that Neanderthals hunted them in every season. The site preserves an unusual lakeside environment with excellent archaeological context. Faunal remains are shaped by human activity, natural deaths, carnivores and the conditions of burial; analysts compare breakage, cut marks, burning and the age profile of animals to distinguish these processes. The study adds a regional example to evidence that Neanderthal diets could be flexible.
Genomes reveal populations, not stereotypes
Ancient DNA from late Neanderthals in Belgium and France has expanded the small number of high-quality genomes available for the period. The 2026 Nature study found substantial genetic diversity and connections among northwestern European groups. It did not find evidence that the sampled late individuals had recently received genes from modern humans, although other evidence shows that interbreeding occurred elsewhere and earlier in the history of the two groups.
Genomes describe ancestry and biological relationships; they do not directly show language, beliefs or daily choices. Archaeology supplies other evidence, including stone tools, animal remains, pigments and traces of fire. Claims about art and symbolism require particular care because dating a mark or pigment layer does not by itself identify its maker. A strong interpretation links the object to a secure archaeological layer and tests alternative explanations.
What changed in our picture
These discoveries replace a simplistic contrast between “primitive Neanderthals” and “modern humans” with a more useful set of questions. How did people solve a painful problem? Which foods were available in a particular landscape? How did population groups move and meet? The answers are uneven because preservation is uneven. A molar can preserve traces of a procedure; a genome can reveal ancestry; a settlement layer can preserve food remains. Their limits are part of the evidence, not a reason to fill gaps with confident stories.
For a wider account of population history, see our overview of Neanderthal groups and contact with Homo sapiens. The distinction between a direct observation and its interpretation also matters when reading evidence for prehistoric behaviour.
Frequently asked questions
Did Neanderthals really drill a tooth?
A 2026 study argues that a molar from Chagyrskaya Cave shows deliberate intervention while the person was alive. The precise tool and success of the treatment cannot be known with certainty.
What do turtle shells tell us about Neanderthal diets?
A large assemblage from Neumark-Nord has damage patterns consistent with collection and processing. It documents local use of turtles, not a universal dietary habit.
Did late Neanderthals in Europe interbreed with modern humans?
Interbreeding occurred in human history, but the 2026 genomes from northwestern Europe did not show recent gene flow in the sampled individuals. That finding does not rule out contact elsewhere or at other times.
Were Neanderthals less intelligent than Homo sapiens?
Fossils do not support a simple ranking of intelligence. Tools and other remains show varied behaviour, while many cognitive abilities do not fossilise directly.