In Greek mythology, the was a terrifying serpentine monster that haunted the marshes of Lerna. Born of the monsters Typhon and Echidna, it was best known for its regenerative ability: for every head severed, two more would grow in its place.
In the 18th century, biologists named a genus of small, freshwater invertebrates after the mythical beast because of their similar regenerative powers. These tiny, tube-like animals are members of the phylum Cnidaria , related to jellyfish and corals. Hydra: Current Biology - Cell Press In Greek mythology, the was a terrifying serpentine
The word —derived from the Greek hýdōr , meaning "water"—is a name that ripples through mythology, science, and history. Whether it refers to a nine-headed monster, a tiny "immortal" animal, or a sprawling constellation, the Hydra consistently represents something multifaceted, persistent, and difficult to conquer. 1. Mythology: The Beast of Lerna These tiny, tube-like animals are members of the
The creature’s destruction was the second of the . To defeat it, Heracles enlisted his nephew Iolaus, who used a torch to cauterize the stumps of the severed heads, preventing them from regrowing. Its venom was so potent that Heracles dipped his arrows in its blood to make them lethal, a move that eventually led to his own demise. 2. Biology: The "Immortal" Organism Heracles enlisted his nephew Iolaus
