A Hydra (IMAGE) Université de Genève Caption A Hydra that produces too little Sp5 spontaneously develops multiple heads. Credit © Brigitte Galliot, UNIGE 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.