Genevieve von Petzinger discovered our ancestors repeatedly used 32 signs. Why?
Five years ago, von Petzinger set out to document and systematically catalogue the geometric signs that were created tens of thousands of years ago in Europe during the Ice Age. She started by compiling a database of the geometric signs found at the nearly 370 known rock art sites across the continent.
From there, she identified gaps in the inventories at many sites and by exploring the rarely documented sites — with her husband, photographer/filmmaker Dillon von Petzinger, to capture the images — she made discoveries that hold tantalizing implications about the origin of art and the evolution of human cognition....
https://ideas.ted.com/what-the-mysterious-symbols-made-by-early-humans-can-teach-us-about-how-we-evolved/