- Hydras can live forever, and the key to their immortality is in the genes CNET
- The Hydra's Freaky Ability to Regrow Its Own Head Relies on This Incredible Mechanism ScienceAlert
- How Hydra animals regenerate their own heads Phys.org
- Hydras can regrow their heads. Scientists want to know how they do it. Popular Science
- How Hydra – A Group of Small Aquatic Animals – Regenerate Their Own Heads SciTechDaily
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