Université de Sherbrooke students had an opportunity to participate in a hands-on lesson in prehistoric rock art this semester when course instructor Adelphine Bonneau gained permission to have her class recreate cave paintings on the university’s underground tunnels. Students in the course created paintings using a variety of mediums, including clay, ochre, calcite, and talc, which was bound with oil, egg yolk, egg white, or pig’s blood. Students were able to experience applying their mixtures to the wall with different techniques. The paintings are located within USherbrooke’s publicly accessible tunnel system. “Rock paintings are supposed to be secret,” said Bonneau, “so I won’t tell you exactly where they are.” CBC Note: Archived stories may contain dead links or be missing source links.