HYDRA

Hydra: A Powerful Tool for Brute-Forcing Passwords

Hydra, Dragonology Wiki

Model Organism: Hydra (Hydra vulgaris)

Biomimetics, Free Full-Text

Insider's Guide to Hydra, Greece

The Hydra: The Complete Guide to the Multi-Headed Serpent

Hail the Hydra, an Animal That May Be Immortal

Help from the Hydra: Can Cancer Ever Be Truly Eliminated? - Science in the News

HydraAEP Web Portal

Hydra: The Lernaean Serpent (Exploring Dragons and Serpents)