60,000-Year-Old Ostrich Eggshell Engravings Show Sophisticated Thought

Engravings on 60,000-year-old ostrich eggshell fragments reveal a structured, geometric way of thinking in early humans. These markings, found at archaeological sites in southern Africa, suggest deliberate planning rather than improvised decoration. Researchers at the University of Bologna led the study. Their findings were published in *PLOS One*.

The analysis of 112 fragments showed consistent spatial patterns. These included recurring angles close to 90 degrees and sets of parallel lines. More complex designs featured hatched bands, grids, and diamond-shaped motifs. These designs demonstrated rotation, translation, repetition, and embedding of patterns.

Early humans likely used the ostrich eggshells as containers for water. The systematic quantitative analysis used geometric and statistical techniques. These methods helped reconstruct the directions, angles, and paths of the engraved lines. Over 80 percent of the configurations contained consistent spatial patterns.

This organized arrangement of shapes and lines indicates emerging abstract thought. The ability to create visual designs with consistent rules represents a significant development in human cognition. The study suggests that *Homo sapiens* 60,000 years ago possessed a remarkable capacity to organize visual space based on abstract principles.

This capacity to transform simple forms into complex systems by following defined rules is a fundamental human trait. It has characterized human history for millennia. This includes the creation of decorations, the development of symbolic systems, and ultimately, writing. The research was part of the FIS Advanced project SAPIENCE, directed by Professor Silvia Ferrara.