Writing is one of humanity’s most powerful inventions, allowing knowledge to travel across centuries. But long before alphabets and clay tablets appeared, early humans may already have developed another way to store and share meaning.
A new study published in the scientific journal Proceedings of the National Academy of Sciences, February 2026 suggests that modern humans may have used structured symbolic signs as early as 40,000 years ago. The findings provide new insights into how human communication evolved thousands of years before the invention of writing.
The research was led by evolutionary linguist Christian Bentz and archaeologist Ewa Dutkiewicz. Their team examined hundreds of portable artifacts associated with the Aurignacian culture, an early culture of modern humans that spread across Europe during the Ice Age between about 43,000 and 34,000 years ago.
Thousands of Signs on Ice Age Artifacts
The researchers analyzed around 260 portable artifacts made from bone, antler, and ivory. These objects included personal ornaments, tools, and small figurines that may have carried symbolic or social meaning within Ice Age communities.
Across these artifacts, the team documented more than 3,000 engraved signs.
At first glance, many of the markings appear simple, short lines, dots, zigzags, crosses, and chevron-like patterns. For decades, archaeologists often interpreted such markings as decorative elements or artistic expressions.
However, the new analysis suggests a more complex possibility.
“We found that these signs are not randomly distributed,” Bentz said. “Their statistical structure indicates that people were likely following certain conventions when producing them.”
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Linguistic Tools Reveal Hidden Patterns
To better understand the markings, the researchers used analytical methods commonly applied in linguistics and information theory. These techniques allow scientists to measure how symbols carry and organize information.
By examining the frequency, diversity, and repetition of the engraved signs, the team found patterns that are unlikely to occur by chance. The statistical properties suggest the marks formed part of a structured symbolic system rather than random decoration.
The analysis also revealed that different types of objects carried different levels of symbolic complexity. Small figurines, for instance, tended to contain denser information patterns than practical tools.
This pattern suggests that the signs may have served distinct purposes depending on the object they appeared on.
A Symbolic System Lasting Thousands of Years
One of the most striking findings of the study is the remarkable consistency of the symbols.
Artifacts from different archaeological sites and time periods—spanning roughly ten thousand years—show similar patterns of engraved signs. Such consistency suggests the symbols were widely understood within the communities that produced them.
According to Dutkiewicz, this stability strengthens the argument that the signs formed part of a shared symbolic tradition.
“We see recurring patterns across many artifacts and locations,” Dutkiewicz said. “That strongly suggests these signs had meanings that were understood within these communities.”
Not Writing—But a Possible Precursor
Despite the structured patterns, the researchers emphasize that the signs should not be considered a true writing system.
Fully developed writing systems—such as the earliest cuneiform scripts of Mesopotamia—appeared only about 5,000 years ago and represent spoken language through standardized symbols.
The Ice Age engravings, by contrast, likely functioned as a simpler form of symbolic communication.
Scientists believe the markings may have been used to indicate ownership, mark group identities, record information, or convey symbolic meanings within social or ritual contexts.
Even without representing spoken language directly, such systems may have played a critical role in the development of human culture.
The Early Roots of Human Communication
For researchers studying human evolution, the ability to create symbolic systems marks a major cognitive milestone.
Symbols allow information to exist outside individual memory, making it possible to share knowledge across time and communities. Over thousands of years, such abilities could have paved the way for more complex cultural developments, including art, mythology, and eventually writing.
According to Bentz, the findings suggest that modern humans possessed sophisticated cognitive abilities far earlier than previously assumed.
“These symbols may appear simple,” he said. “But they could represent an early step toward the complex communication systems humans use today.”
For archaeologists, small objects carved tens of thousands of years ago offer a rare glimpse into the minds of Ice Age people. Each line and dot engraved into bone or ivory may once have carried meaning for a community that lived in a dramatically different world.
Today, with the help of modern analytical tools, researchers are beginning to decode those ancient patterns. And from these modest marks, a deeper story is emerging—one that suggests humans began experimenting with symbolic communication long before the first words were ever written down. (Sulung Prasetyo)
