They chose larger teeth with flatter surfaces for specific tasks.
Across a dozen Middle Paleolithic sites in France and Spain, researchers have found evidence that Neanderthals deliberately selected rhinoceros teeth — choosing larger, flatter specimens — to serve as hammers and anvils in the crafting of stone tools and the cutting of fiber and leather. The discovery, confirmed through experimental replication and microscopic analysis, suggests not improvisation but intention: a systematic extraction of utility from hunted animals that mirrors the resourcefulness long attributed only to modern humans. In revising what we thought we knew about our extinct cousins, science is quietly revising what we thought we knew about the origins of the mind itself.
- A puzzling cluster of rhinoceros teeth at a French Neanderthal site — 91% of them isolated, stripped of their original context — demanded an explanation that conventional assumptions about primitive behavior could not provide.
- Microscopic examination of 25 teeth at El Castillo, Spain, revealed deliberate use-marks inconsistent with feeding or decay, creating urgent pressure to rethink the cognitive baseline assigned to Neanderthals.
- Researchers took the radical step of obtaining modern rhino teeth and attempting to replicate the ancient damage themselves, producing marks that matched the archaeological record with striking precision.
- The experiments confirmed that Neanderthals favored larger, flatter teeth for specific mechanical tasks — stone-shaping and fiber-cutting — demonstrating material selectivity that implies planning, not accident.
- This finding lands as one more weight on a scale that has been tipping for years: alongside burial practices and pigment use, deliberate tool selection from animal remains suggests Neanderthal cognition was far closer to our own than the 'brutish primitive' narrative ever allowed.
When archaeologists noticed that rhinoceros teeth at a Neanderthal site in France were clustered in unusual concentrations — isolated, abundant, and oddly purposeful in their arrangement — they began to suspect the remains were telling a story beyond simple consumption. The investigation that followed, led by researchers from the University of Aberdeen and UNED Madrid, would span twelve Middle Paleolithic sites across France and Spain and ultimately challenge one of paleoanthropology's most stubborn assumptions.
At El Castillo in Spain, the team catalogued 202 rhinoceros teeth and subjected them to magnified scrutiny. Twenty-five bore marks that could not be explained by chewing or natural decay — the scarring was precise, patterned, and purposeful. To understand what had made them, the researchers did something unusually direct: they obtained modern rhino teeth and tried to reproduce the damage themselves. The marks they generated matched the ancient ones. The teeth, they concluded, had functioned as hammers for shaping stone and as anvils for cutting plant fibers and leather.
Critically, the Neanderthals had not grabbed whatever was available. They selected for size and surface geometry — larger, flatter teeth that would perform best for specific tasks. This was not opportunistic scavenging but deliberate material optimization, a behavior that implies the capacity to assess properties, anticipate needs, and match resources to purpose across time.
The implications reach further than the tools themselves. For decades, Neanderthals have been cast as cognitively inferior — capable of survival but not of the abstract, forward-looking thought associated with modern humans. Yet the archaeological record has been quietly accumulating contradictions: evidence of burial, of pigment, and now of systematic resource extraction from hunted animals. Each discovery narrows the perceived gap. This study does not close it, but it moves the boundary again — suggesting that the minds behind these teeth understood their world with a sophistication we are only beginning to credit.
Archaeologists examining a peculiar concentration of rhinoceros teeth at a Neanderthal site in France began asking a straightforward question: why were so many teeth clustered together in one place? The answer, emerging from controlled experiments and microscopic analysis, suggests that our extinct cousins were far more deliberate and sophisticated in their material culture than generations of science had assumed.
Researchers from the University of Aberdeen and UNED Madrid focused their investigation on twelve Middle Paleolithic sites scattered across Spain and France, with particular attention to Payre in France, where a single archaeological layer contained 91 percent isolated teeth. At El Castillo in Spain, they catalogued 202 rhinoceros teeth, and upon close examination under magnification, 25 of them bore distinctive marks—not the random damage of chewing or decay, but the precise scarring pattern of deliberate use. The question became: use for what?
To answer it, the researchers did something radical. They obtained modern rhinoceros teeth and attempted to replicate what they believed Neanderthals had done. Working with these teeth as if they were ancient toolmakers themselves, they discovered that the marks they produced matched the archaeological evidence. The teeth, it turned out, had served as hammers for shaping stone tools and as anvils for cutting through plant fibers and leather. The Neanderthals, the experiments revealed, had been selective about which teeth they chose—favoring larger specimens with flatter surfaces, the kind that would perform best for specific tasks.
This wasn't random scavenging. The pattern across multiple sites, the careful selection of materials, the evidence of intentional modification—all of it pointed toward a cognitive process that looked remarkably like planning. Sanz-Royo, one of the lead researchers, admitted his initial skepticism. He had never encountered teeth bearing these particular marks before. But the experimental evidence was undeniable: Neanderthals had understood the properties of their materials and matched them to purpose.
What makes this discovery significant extends beyond the simple fact that Neanderthals used teeth as tools. It demonstrates that they didn't merely consume the animals they hunted and then discard the remains. Instead, they extracted utility from every part of their kill—a behavior anthropologists have long associated with modern human resourcefulness and symbolic thinking. The teeth weren't a last resort or an accident of preservation. They were chosen, transported, and deployed with intention.
For decades, the popular image of Neanderthals has been one of brutish simplicity, creatures who lacked the cognitive sophistication of modern humans. But the archaeological record has been steadily complicating that narrative. Evidence of burial practices, pigment use, and now the deliberate selection and application of specialized tools from animal remains all point toward minds capable of abstract thought and forward planning. This study adds another layer to that emerging picture, suggesting that the gap between Neanderthal and modern human cognition may have been far narrower than once believed. The question of just how sophisticated Neanderthal thought actually was remains contested among researchers, but discoveries like this one keep pushing the boundary of what we're willing to credit them with understanding.
Notable Quotes
I had never found teeth with these types of marks. At first, I was quite skeptical.— Sanz-Royo, University of Aberdeen
This study is important because it opens the possibility that rhinoceros teeth—which are a super-hard material—were also very useful.— Sanz-Royo
The Hearth Conversation Another angle on the story
Why does it matter that they used rhino teeth instead of, say, stone or bone? Couldn't they have just picked up whatever was lying around?
Because the pattern shows selection. They didn't use every tooth they found. They chose larger ones with flatter surfaces. That's not accident—that's judgment about which tool fits which job.
But how do we know they weren't just gnawing on the teeth while eating, and the marks happened to form?
The researchers ruled that out. They examined the marks under magnification and compared them to what happens when teeth are chewed. These marks came from contact with hard surfaces, repeated and deliberate. Then they replicated it themselves and got the same pattern.
So they were using teeth as hammers to make stone tools. That seems like a lot of steps—why not just use a rock?
Teeth are harder than most stone. And they're shaped differently. A rock is what you have. A tooth is what you choose because it works better for the specific task. That choice is the cognitive part.
Does this change how we should think about Neanderthals?
It suggests they weren't operating on instinct alone. They were thinking about materials, about fit and function. They were looking at a dead animal and seeing not just meat, but a toolkit. That's modern thinking.
What happens next? Do we keep finding more evidence like this?
Almost certainly. Once you know what to look for—those specific marks, that pattern of selection—you start seeing it in the record. The question shifts from whether they did this to how widespread the practice was.