80,000-Year-Old Bone Tools Discovered In South Africa Sheds New Light How Homo Sapiens Evolved

Conny Waters - AncientPages.com - Until the beginning of this century, the production of fully worked bone tools was considered an innovation introduced in Europe around 40,000 years ago by modern humans.

Over the last two decades, research has led to the discovery of bone tools in several regions of Africa, some of which could date back 100,000 years.

But these early bone tools are rare and non-standardized in shape.

Left: Sibudu Cave. Credit: DarkaRolandStark - CC BY-SA 3.0 - Right: Double-beveled bone tools from Sibudu. Credit: Fd’E. - Nature

Key cultural innovations

The discovery of 23 bone tools from the Sibudu rock shelter, Kwa Zulu-Natal, South Africa, all with a flattened ogival-shaped end, found in archaeological layers dated to between 80,000 and 60,000 years ago, changes the picture.

“Our new study documents the technology and function of the earliest fully shaped bone tools from this region. The discovery of these tools contribute to a better understanding of when and how these innovations arose, and what they were used for,” Francesco d’Errico says, the lead author of the paper published in Scientific Reports.

Specialized tools for debarking activities

“Our results suggest that the Sibudu double-beveled tools were not used for hunting or hide processing activities, which are tasks the earliest bone tools have been traditionally associated with, but rather for functions devoted to the exploitation of vegetal resources,” d’Errico explains.

The research was carried out by analysing the use wear on archeological and experimental tools with a confocal microscope. This allowed the researchers to measure roughness parameters of the wear left on the tool tips by use.

Textural and discriminant analysis indicate that most of the bone tools discovered were used in debarking activities, and possibly for digging in humus-rich soil, likely to extract roots or underground storage organs.

Standardized cultural traits

The scientists note that this type of tool continued to be used at this site for 20,000 years, despite the fact that the occupants radically changed the way they produced stone tools during this period.

“These bone tools certainly reflect a local cultural adaptation to a specific environment, as we do not find them elsewhere. Our results support a scenario in which some modern human groups in southern Africa developed and maintained specific, highly standardized cultural traits locally while sharing others across the subcontinent,” d’Errico says.

Complex technical systems

This also implies that MSA peoples had networks allowing the sharing of similar technologies, cultural practices, and new innovations over large territories while simultaneously maintaining local cultural traits and traditions.

From left to right: experimental debarking in Africa, the bone tool tip after use, Francesco d'Errico making replicas of an experimental bone tool in the field. (Photo: University of Bergen/SapienCE)

This study confirms that Middle Stone populations already had complex technical systems to help them gather various resources.

The bark of the trees on which the researchers conducted the debarking experiments is not edible but still used in traditional African medicine.

The bark may have been used already 80,000 years ago for similar purposes by Southern African early modern humans.

The study was published in Scientific Reports

Written by Conny Waters - AncientPages.com Staff Writer