Finely incised ostrich eggshell fragments from sites including Diepkloof, Klipdrift, and Apollo 11 in southern Africa and Namibia preserve geometric motifs such as grids, parallel lines, right angles, ...
A new study published in PLOS One sheds new light on early human intelligence by revealing that 60,000-year-old ostrich eggshell fragments from southern Africa bear intricate geometric markings. These ...
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