Hydra
Mythological Narrative
A gigantic water serpent with multiple heads that regenerate when severed. Slain by Heracles as his second labor, who discovered that two heads grow back for each one cut off.
Scholarly Commentary & Evolution
## The Lernaean Water-Snake
Hesiod places the Hydra among Typhon and Echidna's brood. The second labor of Heracles is to kill the many-headed water-snake of Lerna; for each head cut, two grow, until Iolaus cauterizes the necks. The central head is called immortal and is buried under a rock.
The spring at Amymone is the local hook: a swamp monster tied to Argive hydrology, later moralized as a labor.
## The poisoned arrows
Apollodorus adds that Hera sent a giant crab to bite Heracles' foot during the fight, and Eurystheus refused to count the labour because Iolaus had helped. Heracles dipped his arrows in the Hydra's venomous gall, and the poison runs through the rest of his story: it kills the centaur Nessus, and Nessus's blood, soaked into a robe, eventually kills Heracles himself.
Academic Discussion & Critique
Exchange peer-reviewed hypotheses, comparative Indo-European etymologies, and archaeological field interpretations regarding Hydra.
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