Rock Art (IMAGE) University of Tennessee at Knoxville Caption This art features a bird holding ceremonial maces and a ceremonial monolithic axe transforming into a human face. Credit Jan Simek, Alan Cressler, Nicholas Herrmann and Sarah Sherwood/Antiquity Publications Ltd. Usage Restrictions None 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.