Researchers have uncovered an archaeological site in Ethiopia dating back 100,000 years, providing unusually comprehensive insights into daily existence and mortality. The findings of this study have been detailed in the journal Proceedings of the National Academy of Sciences.
Specifically, stone tools, animal bones, and three fragments of human skeletons were unearthed, offering evidence of life prior to the major outward migrations from Africa. Within a flat expanse of eroded sediment deposits in Ethiopia’s Afar Rift Valley, the artifacts and bones remain scattered almost precisely where they initially fell.
The discovery took place at Fara-Daba, a sedimentary outcrop situated in the Afar Rift Zone of northeastern Africa within Ethiopia. Here, archaeologist Jonas Beyene from the French Center for Ethiopian Studies (CFEE) documented a floodplain repeatedly utilized by ancient hominins.
Unlike many African archaeological locations where finds are preserved within caves, these layers preserve traces of open-air daily routines characteristic of the ancient landscape. This rare continuity lends the material unusual power while simultaneously leaving key questions regarding human movement and behavior unresolved.
Previous dating efforts established the age of the Halibee deposits, which belong to the Dawwite Dol Formation in the Afar Rift of Ethiopia, at roughly 100,000 years by correlating rock strata across the wider area.
The age of this location is approximately 100 millennia, corresponding to the Middle Stone Age, the African period before dispersal events. Older hominin fossils from the same basin date between 160,000 and 154,000 years ago, suggesting the proximity of early Homo sapiens to this spot.
What makes the Halibee assemblage distinct is its placement of a region already known for skeletal remains into context, rather than presenting isolated crania. The over 1,800 artifacts discovered, each larger than one and a half centimeters, are clustered throughout the sediment thickness with virtually no evidence of mixing.
Between 65% and 82% of the tools were fashioned from basalt, a common local rock, and the scattered debris illustrates how people worked their implements using nearby resources.
Evidence points toward repeated, brief visits, as these tools appear to have been made and discarded during short returns to the floodplain. Since the fragments remained localized, the resulting pattern demonstrates specific behaviors rather than a haphazard scatter of stones.
Only a small percentage of tools were made of obsidian, a volcanic glass that fractures into sharp edges, although obsidian itself was not present at Halibee. Less than two percent of recovered artifacts were obsidian-based, meaning each one could potentially serve as a clue to movement or exchange networks.
Beyene cautioned that missing rock outcrops could mislead assessment of raw material sources, as erosion might obscure some of them. Nevertheless, the imported stone remains compelling, though even a tiny sample doesn’t constitute a full trade map.
Animal bones suggest habitation on a seasonally flooded woodland plain adjacent to the ancient Awash River, a place offering sustenance, shade, and hazards. Primates, rodents, and medium-sized ungulates were frequent; giraffes, birds, reptiles, and large predators appeared less often.
“No evidence of butchery or unequivocal human modification of the bones was found,” wrote Jonas Beyene of the French Center for Ethiopian Studies.
In this fauna-rich environment, the site was unlikely to be the sole location for carcass processing, even though humans and animals frequented it repeatedly. Seasonal flooding likely compelled people to pause briefly before subsequent floods erased camp traces, failing to completely scour away the stones and bones.
Shade, water, and tool-making stone drew people back, while the high density of water and animals made each visit fleeting. This pattern of short, repeated use aligns with a mobile lifestyle where groups return to productive patches rather than establishing permanent settlements.
When viewed across time, Halibee emerges less as a snapshot of a single dramatic event and more as a montage of recurring decisions. One skeletal fragment appears to have been rapidly covered by sediment, escaping the tooth marks and weathering typical of exposed remains.
“The available information suggests rapid burial without prolonged surface exposure,” Beyene noted, describing an individual quickly interred, escaping significant weather damage and scavenging.
Rapid burial can occur when flood-borne sediments rapidly seal a body, blocking scavengers and slowing damage from sun exposure and trampling.
However, the team stopped short of labeling it deliberate interment, as nearby animal carcasses could also vanish quickly. Another individual yielded only a single tooth and small bone fragments, which were cracked, darkened, and broken by intense heat.
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At such high temperatures, burning alters the color and structure of bone as heat drives out water and reshapes its mineral crystals. Natural fire remains a possibility, but intentional cremation would push that practice back earlier than any commonly accepted instance.
Evidence remains difficult to gather, with the fire being the only clue whose origin remains uncertain.
The third skeletal fragment, belonging to a smaller adult individual, exhibited tooth marks, fractures, and missing joints, indicating scavenging shortly after death. Predators commonly target soft joints first, tearing carcasses apart, after which bones are dispersed over a short distance.
Compared to the rapidly buried individual and the burned fragments, this trace demonstrates that Halibee’s history did not possess a single, definitive ending. Within the same locale, at least three causes of death—involving water, fire, or animals—can be deciphered.
In the Halibee composition, tools, landscape, wildlife, and human remains are unified into a single open-air scene rather than being disparate fragments from multiple settings.
Further excavation could reveal whether these returns were part of localized daily life, the result of broader travel routes, or contributed to later forays outside of Africa.
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