The Finds (image) American Association for the Advancement of Science Share Print E-Mail Caption These are some of the artifacts from the 15,500-year-old horizon. Credit [Image courtesy of Michael R. Waters] Usage Restrictions May be used only with permission. Share Print E-Mail 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.