For 4,500 years, Stone Age humans returned to this mysterious cave | Ars Technica – in what is now Ethiopia to make paint and dye!

perhaps the most incredible part of the Porc-Epic cave is the lack of change. For more than four millennia, humans used this cave to produce paint out of the same kinds of reddish rocks. Their techniques and favored colors varied a little over time, but for the most part they stuck with what they had learned from generations of ancestors. We’re left wondering what the ochre symbolized for these people.

Source: For 4,500 years, Stone Age humans returned to this mysterious cave | Ars Technica