The study is published in the journal Science Advances. In Greek mythology, the Hydra is a monster slain by Heracles, with each of its nine heads regrowing as soon as it is cut off. But the hydra ...

The study is published in the journal Science Advances. In Greek mythology, the Hydra is a monster slain by Heracles, with each of its nine heads regrowing as soon as it is cut off. But the hydra is ...