Karin Margarita Frei, University of Copenhagen (image) University of Copenhagen Share Print E-Mail Caption Karin Margarita Frei analyses the nettles. Credit Please credit the National Museum of Denmark. Usage Restrictions Credit required 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.