During the Later Stone Age in what is now Namibia, rock artists imbued so much detail into their engravings of human and animal prints that current-day Indigenous trackers could identify which animals' prints they were depicting, as well as the animals' general age and sex. Andreas Pastoors of Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, and colleagues report these findings in a new study published September 13 in the open-access journal PLOS ONE.
