There is a cave in South Africa, the Sterkfontein caves, containing lots of early humanoid fossils but they have been very difficult to date for various reasons.

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So the evolution of our distant ancestors is more complex than was thought.


https://www.the-scientist.com/news-opinion/south-african-hominin-fossils-predate...

Primatologist and anthropologist Jane Goodall discovered that the Gombe
National Park chimpanzees used objects—stems, twigs, branches, leaves,
and rocks—in nine different ways to accomplish tasks associated with feeding,
drinking, cleaning themselves, investigating out-of-reach objects, and as
weapons, flailing branches and throwing rocks as missiles. In communities
outside Gombe, chimpanzees use objects for different purposes. These
behaviours, passed from one generation to the next through observational
learning, can be regarded as primitive cultures.