A Hydra (IMAGE) Université de Genève Caption Une Hydre produisant trop peu de Sp5 développe spontanément de multiples têtes. 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.