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Researchers found two interlocking logs joined using an intentionally cut notch, along with a collection of wooden tools, at Kalambo Falls in Zambia.
The structure of interlocking logs was found near a towering waterfall. The logs are about 476,000 years old.
The interlocking logs are about 476,000 years old and were located near towering Zambian waterfall.
‘While our evidence is suggestive, we do not consider it conclusive as yet’
The team hypothesized that humans evolved modern traits as an adaptational response to the need to hunt progressively smaller and quicker prey.