Eggshell Etchings Suggest Early Humans Knew Geometry

Early hunter-gatherers in southern Africa may have been doing more than just decorating their makeshift water bottles. A new study in the journal PLOS One suggests that engravings on 60,000-year-old ostrich eggshells—which were used to hold water—show a grasp of basic geometry, reports Smithsonian Magazine . Researchers analyzed...