Could this man hold the secret to human regeneration?

Michael Levin wants to help people regrow lost limbs. Now he could be on the verge of a breakthrough. A future in which humans regrow lost or diseased body parts feels like a mirage. But why? After all, many species can accomplish the task with ease. A decapitated flatworm, for example, will grow a new head, replete with a new brain. For the first week of their lives, tadpoles can replace lost tails. And the axolotl, or Mexican salamander, has the ability to regenerate everything from its...

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