Dan Hultmark, Portrait (IMAGE) Umea University Caption Dan Hultmark, researcher at the Department of Molecular Biology and one of the researchers behind the study. Credit Elin Berge Usage Restrictions This photo may only be used in contexts related to this news release. 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.