A new study has revealed that the development of modern human tools was a slow and gradual process rather than a sudden breakthrough.
Published in Scientific Reports, the research focuses on findings from Amanzi Springs, an archaeological site in South Africa, where thousands of stone tools dating from about 380,000 to 95,000 years ago were discovered.
The tools capture an important period in human history when early populations were transitioning from older Acheulian technology—characterised by large, heavy hand axes—to the more advanced, smaller and sharper tools of the Middle Stone Age (MSA).
For years, scientists believed this shift happened quickly. However, the new evidence suggests otherwise.
Researchers found that older and newer tool-making methods overlapped for long periods. Early humans continued using familiar techniques while gradually experimenting with new ones, indicating a steady process of learning and adaptation.
“Persistent methods of flake production indicate a gradual transition and continuity into the Middle Stone Age,” the authors wrote.
The study also found that more advanced tools appeared in the region around 230,000 years ago—earlier than previously thought—making Amanzi Springs one of the earliest known sites showing this transition along Africa’s southern coast.
Beyond the timeline, the findings highlight that human evolution did not occur uniformly across the continent. Instead, different groups developed at different rates depending on local environmental conditions such as climate and resource availability.
The tools also point to changes in human thinking. Over time, tool-making became more deliberate, with evidence of planning and intention rather than simple stone striking. This shift reflects growing cognitive abilities, including problem-solving and creativity.
Researchers believe the location of Amanzi Springs, with its reliable water source and stable environment, may have encouraged repeated human settlement, supporting continuous development over time.
Overall, the study suggests that the path to modern human behaviour was complex and gradual, shaped by both environmental factors and human innovation.
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