Hydra (/ ˈ h aɪ d r ə / HY-drə) is a genus of small freshwater hydrozoans of the phylum Cnidaria. They are solitary, carnivorous jellyfishlike animals, [ 2 ] native to the temperate and tropical …

2015年12月22日 · Tentacled hydra may be immortal in perfect conditions, according to a new study that finds no sign that these animals lose fertility or become more likely to die with age.

2021年10月18日 · Turns out, there's some evidence that the hydra might actually have existed. Yikes! Bad news: The Lernean Hydra may indeed have been inspired by a real creature. Good …

2025年2月1日 · Hydra, genus of invertebrate freshwater animals of the class Hydrozoa (phylum Cnidaria). The body of such an organism consists of a thin, usually translucent tube that …

2022年1月4日 · The "Immortal" Hydra Eternal life. For humans, it’s a fantasy pulled from science fiction, but for the Hydra (Hydra vulgaris), a small freshwater invertebrate, it’s a reality. These …

In Greek mythology the Hydra was a poisonous, many-headed serpent with frustratingly effective powers of regeneration – cut off one of its heads and two would grow in its place. A monster of …

2021年12月13日 · Thanks to new research, scientists are closer to understanding how “immortal” aquatic animals called hydra regrow their lost heads. Hydra are inch-long freshwater creatures …