In the heart of Africa, Archaeologists have discovered the oldest evidence yet of a wooden structure crafted by the hands of a human ancestor. Two tree trunks, notched like Lincoln Logs, were discovered at the bottom of Zambia's Kalambo River. If the logs' estimated age of 476,000 years is correct, it means that woodworking predates the emergence of our own species, Homo sapiens, and demonstrates the intelligence of our hominin ancestors.
Archaeologists discovered the logs at Kalambo Falls, on Lake Tanganyika in northern Zambia near the Tanzanian border, a site that has been studied by scientists since the 1950s. Previous excavations near the falls yielded stone tools, preserved pollen, and wooden artifacts that have helped researchers learn more about human evolution and culture over hundreds of thousands of years.
A new analysis of five modified pieces of wood from Kalambo, however, is pushing back the site's earliest occupation and providing researchers with new insight into the minds of our Middle Pleistocene ancestors.
Researchers describe the wooden objects they discovered in a recently published new study. Two were discovered with stone tools below the river and three were discovered covered in clay deposits above the river level. Because of the permanently elevated water table, these wooden artifacts have survived for hundreds of thousands of years.
In the heart of Africa, archaeologists have discovered the oldest evidence yet
of a wooden structure crafted by the hands of a human ancestor.
Two tree trunks, notched like Lincoln logs, were discovered at the bottom of Zambia's Kalambo River.
If the log's estimated age of 476,000 years is correct, it means that woodworking predates the
emergence of our own species, Homo sapiens, and demonstrates the intelligence of our hominin
ancestors. Archaeologists discovered the logs at Kalambo Falls, on Lake Tanganyika in northern
Zambia, near the Tanzanian border, a site that has been studied by scientists since the 1950s.
Previous excavations near the falls yielded stone tools, preserved pollen, and wooden artefacts
that have helped researchers learn more about human evolution and culture over hundreds of
thousands of years. A new analysis of five modified pieces of wood from Kalambo, however,
is pushing back the site's earliest occupation and providing researchers with new insight into
the minds of our Middle Pleistocene ancestors. Researchers described the wooden objects they
discovered in a recently published new study. Two were discovered with stone tools below the river,
and three were discovered covered in clay deposits above the river level.
Because of the permanently elevated water table, these wooden artefacts have survived
for hundreds of thousands of years. Through luminescence dating of sand samples from the site,
archaeologists' colleagues discovered three clusters, a cut log and a tapered piece of wood
dating to 324,000 years ago, a digging stick dating to 390,000 years ago, and a wooden wedge
and two overlapping logs dating to 476,000 years ago. While the small modified hunks of
wood from Kalambo are similar to 400,000-year-old foraging and hunting tools discovered in Europe
and China, the interlocking logs have no known parallels in the African or Eurasian Paleolithic,
according to the researchers. Fossil skulls in Africa at this time include Bodo Man from Ethiopia,
but fossils from Zambia are almost unknown for this time. The upper log, recovered from a layer
that also contained stone tools, was 55 inches long and was discovered lying at a 75-degree angle
on a large tree trunk. The bottom of the top log and the top of the bottom trunk both had evidence
of chopping and scraping to create a notch, allowing them to fit together snugly. Wood
from tree trunks allowed humans to build large objects, implying that building a raised platform,
walkway, or foundation for dwellings would improve their life in a periodically wet floodplain.
The newly discovered objects could help scientists better understand our hominin
ancestors' technology by pushing back the dates of the earliest examples of woodworking.
Archaeological evidence of hominin behaviour is typically derived from nearly indestructible
artefacts such as stone tools, so the discovery of well-preserved perishable wooden items at
Kalambo Falls is highly significant. Given the prevalence of wood, it is unthinkable that
hominins would not use it. The new study demonstrates that humans and hominins used
available resources, and the very early date of the notched logs necessitates a rethinking of how
human cultural and biological evolution is understood. Scientists previously thought that
the hominins who lived at Kalambo Falls during the Middle Pleistocene were nomadic foragers with
little technological skill, but new discoveries show that they were far more intelligent than
previously thought, according to the researchers. This evidence enables us to consider various
materials used by hominins, such as those that left traces, and those that are perishable.
Meanwhile, in Europe, traces of large huts have been discovered at Terra Amata in southern France.
The huts were built by planting saplings in an oval pattern and then connecting their tops in
the centre. The saplings were braced by stones placed in a ring around the hut. Hearths scooped
in the ground and lined with burnt stones and blackened bones were discovered in some of these
huts. On a fossil beach, there was a settlement with several layers of habitation.
The habitations dated back to 380,000 BC and included evidence that the inhabitants lived in
beach huts. Each hut had a fireplace in the centre, with ashes indicating that the inhabitants had
domesticated fire. The discovery of red ochre at Terra Amata suggests that ancient humans used
ochre for personal adornment. According to dental evidence, these hominins were probably right-handed.
The last common ancestor was a sophisticated hunter, as evidenced by wooden projectile
spears attributed to this species discovered in Schöningen, Germany. The relics included
low walls of stones and beach pebbles placed north-west of the fireplaces, to protect the
fire from the strong mistral wind. Archaeologists thought the huts were made of animal skins
supported by poles, with a hole in the centre for the smoke to escape. A shelter of this size
could house between 20 and 40 people. If this theory is correct, Terra Amata is one of Europe's
oldest discoveries of man-made human settlements. This ancient shelter provided shelter for an early
human family or social group. At this location, scientists discovered post holes and other
evidence of multiple shelters. Some shelters were up to 50 feet long, which has implications for
There is also the first convincing evidence of two other innovations at 400,000 years ago,
the domestication of fire in hearths and the construction of artificial shelters.
In Asia, Homo erectus was known to have used stone tools, and it now appears that our ancient
ancestor also constructed shelters. Archaeologists in Japan have discovered the remains of what is
thought to be the world's oldest artificial structure. The site has been dated to 500,000
years ago, when Homo erectus lived in the area. It appears to be ten post holes that form two
irregular pentagons, thought to be the remains of two huts. Thirty stone tools were discovered
scattered throughout the site. On a hillside north of Tokyo, Japanese archaeologists discovered the
remains of what is thought to be the world's oldest artificial structure 20 years ago.
The shelter would have been constructed by an ancient human ancestor known to have used stone
tools, Homo erectus. According to a report in New Scientist, the site dates back half a million years.
It appears to be ten post holes forming two irregular pentagons, which could be the remains
of two huts. Thirty stone tools were also discovered scattered throughout the site.
If this is correctly dated and interpreted, it is the first good evidence of a hut structure
built by these people 500,000 years ago. Prior to the discovery, the oldest remains of a structure
were found in Terra Amata, France, between 200,000 and 400,000 years ago. Archaeologists discovered
a layer of volcanic ash in which the shallow post holes were dug after digging through about
two metres of river deposits. The holes stood out clearly from the volcanic layer. They had
The remains may shed light on how Homo erectus lived and hunted. It's evidence that they built
structures, but we don't know how permanent they were. Who knows if this was a shelter they stayed
in for a week or a month. It's fascinating because it demonstrates that hominids could imagine using
technology to organise their lives. They had the idea of building a structure, a place where people
could sleep. It symbolises a conceptual divide between inside and outside, and an important step
in human evolution.