60,000-Year-Old Ostrich Eggshell Engravings Reveal Early Geometry
A fresh study suggests that some of humanity’s earliest “geometric thinking” wasn’t scratched onto cave walls, but etched into ostrich eggshells used by Ice Age people in southern Africa. By measuring angles, line directions, and repeated pattern structures, researchers argue the designs follow consistent rules rather than ad‑hoc doodling. If they’re right, these fragile fragments preserve a surprisingly disciplined visual tradition more than 60,000 years old.
A Geometric Grammar on Ostrich Eggshells
The paper – Earliest geometries: A cognitive investigation of Howiesons Poort engraved ostrich eggshells, published by PLOS One analyzed 112 engraved fragments from sites in South Africa and Namibia. A companion report summarizing the work says over 80% of the configurations show coherent spatial regularities, including repeated parallel lines and angles close to 90 degrees. The researchers describe this as a kind of “visual grammar,” built through rotation, translation, repetition, and “embedding” (nesting elements inside others) according to a summary on Phys.org.
Silvia Ferrara of the University of Bologna, who coordinated the research, said: “These signs reveal a surprisingly structured, geometric way of thinking.”
The same report quotes first author Valentina Decembrini arguing that transforming simple forms into complex systems by rule-following is a deeply human trait, linking decoration to later symbolic systems. Whether the marks carried specific meanings is still unknown, but the structure itself is the find.
www.Ancient-Origins.net – Reconstructing the story of humanity’s past
Source: https://www.ancient-origins.net/news-history-archaeology/ostrich-eggshell-engravings-00102552
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