Draisine (IMAGE) Saarland University Caption Professor Holger Hermanns riding the Dandy Horse, in the background Florian Schiessl, on the right the Belgian bicycle engineer Dries Callebaut. Credit Oliver Dietze 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.