Steffi Burchardt, Uppsala University (image) Uppsala University Share Print E-Mail Caption This is Steffi Burchardt in front of Payun in Argentina. Credit Karen Mair Usage Restrictions May only be published in connection to reports about research by Burchardt et al. 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.