: It suggests that early humans had a shared, intentional system of graphic communication long before formal writing systems like cuneiform existed. You can read the full study at PNAS .
3. Comparing Visual vs. Spoken Language (Psychology/Linguistics) : It suggests that early humans had a
Humans 40,000 y ago developed a system of conventional signs : It suggests that early humans had a
: It challenges the idea that sign languages are "just" gestures and explores how the visual nature of signing allows for more direct meaning than spoken sounds. The full text is available via Frontiers in Psychology . : It suggests that early humans had a