Metcalf CIFAR (IMAGE) Colorado State University Caption Jessica Metcalf, a CIFAR Azrieli Global Scholar, working at the Australian Centre for Ancient DNA to recover microbial DNA from viking latrine material. Credit Provided/Jessica Metcalf 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.