Ancient Salmon Bones (IMAGE) Washington State University Caption Washington State University researchers extracted ancient DNA from salmon bones like these found in garbage piles, or middens, as many as 7,000 years old. Credit Washington State University 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.