Inside Pinnacle Point Cave (image) Arizona State University Caption The excavation shows layered sequences of human prehistory captured in this cave. A yellow total station is shown at the right. Credit Erich Fisher Usage Restrictions This image may only be used by permission of the ASU Institute of Human Origins for the purposes of illustrating coverage of the accompanying article. 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.