Ancient Guanaco Jawbone (IMAGE) University of Adelaide Caption Ancient guanaco jawbone, and tooth sample used to extract DNA, originally excavated from Cueva del Mylodon (shown in photo 4). Credit Credit Alan Cooper/Malmo Museum Usage Restrictions for use with this story only 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.