Hydra is a genus of tiny freshwater animals that catch and sting prey using a ring of tentacles. But before a hydra can eat, it has to rip its own skin apart just to open its mouth. Scientists now ...

People dreading the passing of their dog or cat, could find that an unusual marine creature might prove the perfect pet. Scientists claim a certain kind of a freshwater polyp is ‘effectively immortal’ ...

When the Greek hero Hercules sliced through one of the Lernaean Hydra's nine heads, two grew back in its place. This mythical creature's real life counterparts, a genus of tiny cylindrical animals ...