The Jena Experiment (IMAGE) Karlsruher Institut für Technologie (KIT) Caption The Jena Experiment, one of the biggest and longest experiments on biodiversity, studied the effects of biodiversity on grassland. Credit (Photo: Jena Experiment) 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.