Image Courtesy of Paul Kenrick (image) University of Bristol Share Print E-Mail Caption Rhynia gwynne-vaughanii -- 400 million-year-old fossil plant stem from Aberdeenshire, Scotland. Credit Image courtesy of The Natural History Museum, London. Usage Restrictions None 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.