Health
Aided by stem cells, a lizard regenerates a perfect tail for first time in more than 250 million years – Newswise
Lizards can regrow severed tails, making them the closest relative to humans that can regenerate a lost appendage.

Newswise — Lizards can regrow severed tails, making them the closest relative to humans that can regenerate a lost appendage. But in lieu of the original tail that includes a spinal column and nerves, the replacement structure is an imperfect cartilage…
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