Ancient Manioc Planting Bed (IMAGE) University of Colorado at Boulder Caption CU-Boulder graduate student Christine Dixon uncovers ancient manioc planting bed at Ceren, the first evidence of ancient manioc cultivation at any New World archaeology site. Credit Payson Sheets, University of Colorado 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.