Ceramics Analyzed (IMAGE) Spanish National Research Council (CSIC) Caption Main ceramics analyzed in the experiments and heatmap of the visual fixations in each one of them. The images are organized, from left to right, in chronological order from oldest to most recent. Following time, the fixations direction changes from horizontal to vertical. Credit CSIC Usage Restrictions CC BY-NC License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.