Composite Pigment (image) Arizona State University Caption Ochre specimens with scrape marks, believed to have been made by early humans who used the red pigment in symbolic behavior. Credit (Photo courtesy of The Mossel Bay Archaeology Project) Usage Restrictions Photo credit. 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.