Hail the Hydra, an Animal That May Be Immortal

In ancient Greek myth, the Hydra was a multi-headed monster that grew two more heads for every one that it lost. As it turns out, the real-life animal named after this mythical beast may be even more tenacious. A new study finds that hydra — spindly, freshwater polyps — can live seemingly forever, without aging. Unlike most multicellular species, hydra don’t … Continue reading →