A new scientific study has revealed that some of the earliest modern humans in Europe were creating structured signs more than forty thousand years ago. These were not random scratches or decorations. They were organized sequences carved into ivory figurines, tools, and ornaments by people of the Aurignacian culture in what is now southwest Germany. The discovery raises important questions about how early humans stored information and how far back the roots of symbolic communication really go. The research appears in the Proceedings of the National Academy of Sciences and provides the strongest evidence so far that these ancient marks formed a deliberate system rather than isolated designs.
The caves of the Swabian Jura have produced some of the most impressive Ice Age artifacts ever found, including carved animals, musical instruments, and the famous lion human figurine. Many of these objects also carry engraved lines, dots, crosses, and other small signs. These marks have often been described as decoration, but the new study shows something different. When thousands of these signs are analyzed with modern statistical tools, the patterns reveal a structured and repeatable system. The marks follow consistent rules about where they appear, how often they repeat, and which types of objects they are carved onto.
One of the clearest results is that the signs were not placed randomly. Figurines carry far more complex sign sequences than tools or ornaments. This means the carvers were selective. They saved their most detailed sequences for the objects that held the greatest cultural value. Tools tend to show simpler sequences, and ornaments even less. This pattern is found across many caves, across different materials, and across many centuries of time. The people who lived in this region passed down shared rules for sign use for at least ten thousand years.
Another important finding is that certain signs appear with specific types of objects. Crosses appear on animals such as mammoths and horses but never on human figurines. Dots appear on humans and big cats but never on tools. These choices are not explained by the material being carved, because tools and figurines were often made from the same ivory. The choices point to a meaningful set of rules that the ancient carvers followed. The signs were tied to categories that meant something to the people who produced them.
When the researchers compared these Ice Age signs to much later systems such as early Mesopotamian tablets, they found surprising similarities. These early tablets were used to count goods and record quantities long before the invention of full writing. The statistical fingerprints of the tablet signs match the fingerprints of the Aurignacian signs. Both systems rely on high repetition and low diversity, which suggests they served practical functions rather than storytelling or spoken language. The Ice Age signs do not represent speech and therefore are not writing. Yet they show a level of structure that belongs to a true information system.
One of the most striking discoveries is how stable the sign system remained over time. Most cultural traditions change as they pass from generation to generation. The Aurignacian system did not. The level of information encoded in the signs stays steady for at least ten millennia. This level of stability is hard to explain unless the signs carried a shared purpose and were taught as part of cultural life. The system eventually disappears, but while it existed it remained consistent across a vast span of time.
The researchers do not claim to know the meaning of the signs. Without a surviving tradition or later script to compare them to, the meanings remain out of reach. What can be measured is the structure of the system, and the structure shows intentional design. Some earlier scholars suggested the marks might record lunar cycles, animal movements, or seasonal changes. Others saw them as counting marks or ritual indicators. The new study does not settle these debates, but it does show that the signs had rules and were not random marks of expression.
The work also sheds light on the cognitive abilities of early humans. The people who carved these signs lived in small bands of hunter gatherers, long before farming, long before the formation of cities, and long before known writing. Yet they had the ability to store information outside their minds and preserve it on physical objects. They understood how to create repeatable patterns and how to assign certain signs to certain categories of objects. They also passed these rules on for thousands of years. This suggests that the cognitive foundations for managing external information existed far earlier than scholars once thought.
Another key point is that the signs represent a form of communication that sits between simple decoration and true writing. They are not the direct ancestors of any known script, yet they show features that later writing systems also display. They have an inventory of sign types, linear ordering, repetition structures, and deliberate placement. What they do not have is the connection to spoken language that defines writing. Instead, they appear to represent ideas or quantities in a fixed visual form.
The study also reveals a contrast with the later Mesopotamian tablets. Those early tablets evolved rapidly and grew more complex as societies expanded. The Aurignacian system stayed stable and then vanished. This suggests that the needs of Ice Age societies were different. The signs may have served within small groups and required no further expansion. They may have marked social roles, tracked seasonal events, or encoded spiritual concepts tied to the figurines. Whatever their purpose, they were meaningful enough to preserve without change for thousands of years.
The new research provides the most detailed and objective look yet at these ancient marks. It shows that the earliest modern humans in Europe were capable of organized symbolic communication long before the appearance of known writing systems. The signs carved on ivory and bone were part of a shared cultural system that required memory, teaching, and intention. Far from being simple decoration, they reveal that Ice Age societies were managing information in ways that are only now becoming visible through systematic analysis.
Source:
Proceedings of the National Academy of Sciences. “Humans 40,000 y ago developed a system of conventional signs.”
https://www.pnas.org/doi/10.1073/pnas.2520385123
