Ancient ostrich eggshell engravings from southern Africa reveal something unexpected: a hidden geometry. At multiple archaeological sites across southern Africa, researchers have uncovered hundreds of unusual fragments of ostrich eggshell. These pieces date back more than 60,000 years and were engraved by groups of Homo sapiens living in the region at the time. A new [...]from SciTechDaily https://ift.tt/B6AvZFt
