Scientists have long been stymied by human regenerative healing — that is, wholesale regrowth of, say, a severed limb — an ability inherent in some species but lost on humans. But new research suggests the ability to regenerate isn’t based on something newts and flatworms have that we don’t; rather, it’s something we do have that’s keeping us from regenerating tissues. Researchers think a gene called p21 may control regenerative healing, and that by switching it off, humans could perform our own regeneration.
Full story: Humans Could Regenerate Tissue Like Newts By Switching Off a Single Gene | Popular Science