A study of ancient ostrich eggshells reveals that early humans were capable of advanced geometric thinking, using precise patterns and intricate designs more than 60,000 years ago. 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 designs offer an astonishing glimpse into the adv... [4749 chars]